{"id":"CVE-2026-11979","aliases":["ALSA-2026:60394","ALSA-2026:61247","ALSA-2026:61248","BELL-CVE-2026-11979","CLSA-2026-1782998484","CLSA-2026-1783006034","CLSA-2026-1783076182","CLSA-2026-1783076452","CLSA-2026-1783093006","CLSA-2026-1783093248","CLSA-2026-1783095251","CLSA-2026-1783095447","CLSA-2026-1783587336","CLSA-2026-1783587973","CLSA-2026-1783588204","CLSA-2026-1783632090","CLSA-2026-1783670609","CLSA-2026-1783948495","DEBIAN-CVE-2026-11979","EUVD-2026-40092","GHSA-h67q-h62w-5mjr","MGASA-2026-0459","OESA-2026-3039","RHSA-2026:33840","RHSA-2026:60394","RHSA-2026:61247","RHSA-2026:61248","RLSA-2026:60394","RLSA-2026:61247","RLSA-2026:61248","SUSE-SU-2026:22596-1","SUSE-SU-2026:22636-1","SUSE-SU-2026:22806-1","SUSE-SU-2026:22894-1","SUSE-SU-2026:3095-1","SUSE-SU-2026:3096-1","SUSE-SU-2026:3097-1","SUSE-SU-2026:3111-1","UBUNTU-CVE-2026-11979","openSUSE-SU-2026:11258-1","openSUSE-SU-2026:21317-1"],"status":"disputed","title":"Stack-Based Buffer Overflow in libxml2","description":"libxml2 is vulnerable to multiple stack-based buffer overflows in the xmlcatalog utility when running in --shell mode. The usershell() function processes user input using fixed-size stack buffers without proper bounds checking.\nBy supplying an overly long input line, an attacker can overflow internal buffers (command, arg, and argv) during input parsing. This results in memory corruption within the stack frame.\nSuccessful exploitation may cause a crash or potentially allow arbitrary code execution in the context of the xmlcatalog process.\n\nThis issue has been fixed in the commit c2e233fc.\n\nNOTE:\nThe maintainers of this project did not agree that this issue is a vulnerability and considered it a bug.","severity":{"version":"4.0","score":1.8,"vector":"CVSS:4.0/AV:L/AC:L/AT:P/PR:N/UI:A/VC:N/VI:N/VA:L/SC:L/SI:L/SA:N","level":"low","assessor":"cna","from":"cve"},"epss":{"day":"2026-11-09","score":0.00148,"percentile":0.04044,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":true},"cwes":["CWE-121"],"published":"2026-06-29T13:21:42Z","modified":"2026-10-29T11:32:31Z","fixes":[{"ecosystem":"AlmaLinux:10","package":"libxml2","fixed_in":["2.12.5-10.el10_2.3"],"sources":["osv"]},{"ecosystem":"AlmaLinux:10","package":"libxml2-devel","fixed_in":["2.12.5-10.el10_2.3"],"sources":["osv"]},{"ecosystem":"AlmaLinux:10","package":"libxml2-static","fixed_in":["2.12.5-10.el10_2.3"],"sources":["osv"]},{"ecosystem":"AlmaLinux:10","package":"python3-libxml2","fixed_in":["2.12.5-10.el10_2.3"],"sources":["osv"]},{"ecosystem":"AlmaLinux:8","package":"libxml2","fixed_in":["2.9.7-21.el8_10.7"],"sources":["osv"]},{"ecosystem":"AlmaLinux:8","package":"libxml2-devel","fixed_in":["2.9.7-21.el8_10.7"],"sources":["osv"]},{"ecosystem":"AlmaLinux:8","package":"python3-libxml2","fixed_in":["2.9.7-21.el8_10.7"],"sources":["osv"]},{"ecosystem":"TuxCare:AlmaLinux:9.2","package":"libxml2","fixed_in":["2.9.13-3.el9_2.1.tuxcare.els14"],"sources":["osv"]},{"ecosystem":"TuxCare:AlmaLinux:9.2","package":"libxml2-devel","fixed_in":["2.9.13-3.el9_2.1.tuxcare.els14"],"sources":["osv"]},{"ecosystem":"TuxCare:AlmaLinux:9.2","package":"libxml2-static","fixed_in":["2.9.13-3.el9_2.1.tuxcare.els14"],"sources":["osv"]},{"ecosystem":"TuxCare:AlmaLinux:9.2","package":"python3-libxml2","fixed_in":["2.9.13-3.el9_2.1.tuxcare.els14"],"sources":["osv"]},{"ecosystem":"TuxCare:Ubuntu:18.04","package":"libxml2","fixed_in":["2.9.4+dfsg1-6.1ubuntu1.9+tuxcare.els8"],"sources":["osv"]},{"ecosystem":"TuxCare:Ubuntu:18.04","package":"libxml2-dev","fixed_in":["2.9.4+dfsg1-6.1ubuntu1.9+tuxcare.els8"],"sources":["osv"]},{"ecosystem":"TuxCare:Ubuntu:18.04","package":"libxml2-doc","fixed_in":["2.9.4+dfsg1-6.1ubuntu1.9+tuxcare.els8"],"sources":["osv"]},{"ecosystem":"TuxCare:Ubuntu:18.04","package":"libxml2-utils","fixed_in":["2.9.4+dfsg1-6.1ubuntu1.9+tuxcare.els8"],"sources":["osv"]},{"ecosystem":"TuxCare:Ubuntu:18.04","package":"python-libxml2","fixed_in":["2.9.4+dfsg1-6.1ubuntu1.9+tuxcare.els8"],"sources":["osv"]},{"ecosystem":"TuxCare:Ubuntu:18.04","package":"python3-libxml2","fixed_in":["2.9.4+dfsg1-6.1ubuntu1.9+tuxcare.els8"],"sources":["osv"]},{"ecosystem":"TuxCare:CentOS-Stream:8","package":"libxml2","fixed_in":["2.9.7-18.el8.tuxcare.els10"],"sources":["osv"]},{"ecosystem":"TuxCare:CentOS-Stream:8","package":"libxml2-devel","fixed_in":["2.9.7-18.el8.tuxcare.els10"],"sources":["osv"]},{"ecosystem":"TuxCare:CentOS-Stream:8","package":"libxml2-static","fixed_in":["2.9.7-18.el8.tuxcare.els10"],"sources":["osv"]},{"ecosystem":"TuxCare:CentOS-Stream:8","package":"python3-libxml2","fixed_in":["2.9.7-18.el8.tuxcare.els10"],"sources":["osv"]},{"ecosystem":"TuxCare:Ubuntu:16.04","package":"libxml2","fixed_in":["2.9.3+dfsg1-1ubuntu0.7+tuxcare.els14"],"sources":["osv"]},{"ecosystem":"TuxCare:Ubuntu:16.04","package":"libxml2-dev","fixed_in":["2.9.3+dfsg1-1ubuntu0.7+tuxcare.els14"],"sources":["osv"]},{"ecosystem":"TuxCare:Ubuntu:16.04","package":"libxml2-doc","fixed_in":["2.9.3+dfsg1-1ubuntu0.7+tuxcare.els14"],"sources":["osv"]},{"ecosystem":"TuxCare:Ubuntu:16.04","package":"libxml2-utils","fixed_in":["2.9.3+dfsg1-1ubuntu0.7+tuxcare.els14"],"sources":["osv"]},{"ecosystem":"TuxCare:Ubuntu:16.04","package":"python-libxml2","fixed_in":["2.9.3+dfsg1-1ubuntu0.7+tuxcare.els14"],"sources":["osv"]},{"ecosystem":"TuxCare:OracleLinux:6","package":"libxml2","fixed_in":["2.7.6-21.0.1.el6_8.1.tuxcare.ol.els17"],"sources":["osv"]},{"ecosystem":"TuxCare:OracleLinux:6","package":"libxml2-devel","fixed_in":["2.7.6-21.0.1.el6_8.1.tuxcare.ol.els17"],"sources":["osv"]},{"ecosystem":"TuxCare:OracleLinux:6","package":"libxml2-python","fixed_in":["2.7.6-21.0.1.el6_8.1.tuxcare.ol.els17"],"sources":["osv"]},{"ecosystem":"TuxCare:OracleLinux:6","package":"libxml2-static","fixed_in":["2.7.6-21.0.1.el6_8.1.tuxcare.ol.els17"],"sources":["osv"]},{"ecosystem":"TuxCare:CentOS:6","package":"libxml2","fixed_in":["2.7.6-21.el6_8.1.tuxcare.els15"],"sources":["osv"]},{"ecosystem":"TuxCare:CentOS:6","package":"libxml2-devel","fixed_in":["2.7.6-21.el6_8.1.tuxcare.els15"],"sources":["osv"]},{"ecosystem":"TuxCare:CentOS:6","package":"libxml2-python","fixed_in":["2.7.6-21.el6_8.1.tuxcare.els15"],"sources":["osv"]},{"ecosystem":"TuxCare:CentOS:6","package":"libxml2-static","fixed_in":["2.7.6-21.el6_8.1.tuxcare.els15"],"sources":["osv"]},{"ecosystem":"TuxCare:Debian:10","package":"libxml2","fixed_in":["2.9.10+dfsg-5ubuntu0.20.04.10+tuxcare.els6"],"sources":["osv"]},{"ecosystem":"TuxCare:Debian:10","package":"libxml2-dev","fixed_in":["2.9.10+dfsg-5ubuntu0.20.04.10+tuxcare.els6"],"sources":["osv"]},{"ecosystem":"TuxCare:Debian:10","package":"libxml2-doc","fixed_in":["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Buffer Overflow in libxml2","description":"libxml2 is vulnerable to multiple stack-based buffer overflows in the xmlcatalog utility when running in --shell mode. The usershell() function processes user input using fixed-size stack buffers without proper bounds checking.\nBy supplying an overly long input line, an attacker can overflow internal buffers (command, arg, and argv) during input parsing. This results in memory corruption within the stack frame.\nSuccessful exploitation may cause a crash or potentially allow arbitrary code execution in the context of the xmlcatalog process.\n\nThis issue has been fixed in the commit c2e233fc.\n\nNOTE:\nThe maintainers of this project did not agree that this issue is a vulnerability and considered it a bug.","status":"disputed","published":"2026-06-29T13:21:42.697Z","modified":"2026-06-29T13:59:18.501Z","cvss":[{"version":"4.0","score":1.8,"vector":"CVSS:4.0/AV:L/AC:L/AT:P/PR:N/UI:A/VC:N/VI:N/VA:L/SC:L/SI:L/SA:N","level":"low","assessor":"cna"}],"cwes":["CWE-121"],"updated_at":"2026-11-02T14:20:04.463704Z"}],"euvd":[{"id":"EUVD-2026-40092","description":"libxml2 is vulnerable to multiple stack-based buffer overflows in the xmlcatalog utility when running in --shell mode. The usershell() function processes user input using fixed-size stack buffers without proper bounds checking.\nBy supplying an overly long input line, an attacker can overflow internal buffers (command, arg, and argv) during input parsing. This results in memory corruption within the stack frame.\nSuccessful exploitation may cause a crash or potentially allow arbitrary code execution in the context of the xmlcatalog process.\n\nThis issue has been fixed in the commit c2e233fc.\n\nNOTE:\nThe maintainers of this project did not agree that this issue is a vulnerability and considered it a bug.","status":"published","published":"2026-06-29T13:21:42Z","modified":"2026-06-29T13:59:18Z","cvss":[{"version":"4.0","score":1.8,"vector":"CVSS:4.0/AV:L/AC:L/AT:P/PR:N/UI:A/VC:N/VI:N/VA:L/SC:L/SI:L/SA:N","level":"low"}],"updated_at":"2026-11-02T18:20:22.87152Z"}],"ghsa":[{"id":"GHSA-h67q-h62w-5mjr","title":"libxml2 is vulnerable to multiple stack-based buffer overflows in the xmlcatalog utility when...","description":"libxml2 is vulnerable to multiple stack-based buffer overflows in the xmlcatalog utility when running in --shell mode. The usershell() function processes user input using fixed-size stack buffers without proper bounds checking.\nBy supplying an overly long input line, an attacker can overflow internal buffers (command, arg, and argv) during input parsing. This results in memory corruption within the stack frame.\nSuccessful exploitation may cause a crash or potentially allow arbitrary code execution in the context of the xmlcatalog process.\n\nThis issue has been fixed in the commit c2e233fc.\n\nNOTE:\nThe maintainers of this project did not agree that this issue is a vulnerability and considered it a bug.","status":"published","published":"2026-06-29T15:32:05Z","modified":"2026-06-30T21:31:39Z","cvss":[{"version":"4.0","score":1.8,"vector":"CVSS:4.0/AV:L/AC:L/AT:P/PR:N/UI:A/VC:N/VI:N/VA:L/SC:L/SI:L/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X","level":"low"},{"version":"3.1","score":7.8,"vector":"CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H","level":"high"}],"cwes":["CWE-121"],"updated_at":"2026-11-02T15:09:06.582219Z"}],"nvd":[{"id":"CVE-2026-11979","description":"libxml2 is vulnerable to multiple stack-based buffer overflows in the xmlcatalog utility when running in --shell mode. The usershell() function processes user input using fixed-size stack buffers without proper bounds checking.\nBy supplying an overly long input line, an attacker can overflow internal buffers (command, arg, and argv) during input parsing. This results in memory corruption within the stack frame.\nSuccessful exploitation may cause a crash or potentially allow arbitrary code execution in the context of the xmlcatalog process.\n\nThis issue has been fixed in the commit c2e233fc.\n\nNOTE:\nThe maintainers of this project did not agree that this issue is a vulnerability and considered it a bug.","status":"disputed","published":"2026-06-29T14:16:40.593Z","modified":"2026-10-25T21:10:00.77Z","cvss":[{"version":"4.0","score":1.8,"vector":"CVSS:4.0/AV:L/AC:L/AT:P/PR:N/UI:A/VC:N/VI:N/VA:L/SC:L/SI:L/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X","level":"low","assessor":"secondary"},{"version":"3.1","score":7.8,"vector":"CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H","level":"high","assessor":"primary"}],"cwes":["CWE-121"],"updated_at":"2026-11-02T14:12:26.508751Z"}],"osv":[{"id":"BELL-CVE-2026-11979","title":"CVE-2026-11979 does not affect BellSoft software","status":"withdrawn","published":"2026-07-01T06:03:01.395041Z","modified":"2026-07-09T07:15:04.882753797Z","cvss":[{"version":"3.1","score":7.8,"vector":"CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H","level":"high"}],"updated_at":"2026-11-02T15:28:23.037038Z"},{"id":"CVE-2026-11979","title":"Stack-Based Buffer Overflow in libxml2","description":"libxml2 is vulnerable to multiple stack-based buffer overflows in the xmlcatalog utility when running in --shell mode. The usershell() function processes user input using fixed-size stack buffers without proper bounds checking.\nBy supplying an overly long input line, an attacker can overflow internal buffers (command, arg, and argv) during input parsing. This results in memory corruption within the stack frame.\nSuccessful exploitation may cause a crash or potentially allow arbitrary code execution in the context of the xmlcatalog process.\n\nThis issue has been fixed in the commit c2e233fc.\n\nNOTE:\nThe maintainers of this project did not agree that this issue is a vulnerability and considered it a bug.","status":"published","published":"2026-06-29T13:21:42.697Z","modified":"2026-10-28T10:45:36.241701772Z","cvss":[{"version":"4.0","score":1.8,"vector":"CVSS:4.0/AV:L/AC:L/AT:P/PR:N/UI:A/VC:N/VI:N/VA:L/SC:L/SI:L/SA:N","level":"low"}],"cwes":["CWE-121"],"updated_at":"2026-11-02T15:44:57.354194Z"},{"id":"DEBIAN-CVE-2026-11979","description":"libxml2 is vulnerable to multiple stack-based buffer overflows in the xmlcatalog utility when running in --shell mode. The usershell() function processes user input using fixed-size stack buffers without proper bounds checking. By supplying an overly long input line, an attacker can overflow internal buffers (command, arg, and argv) during input parsing. This results in memory corruption within the stack frame. Successful exploitation may cause a crash or potentially allow arbitrary code execution in the context of the xmlcatalog process.  This issue has been fixed in the commit c2e233fc.  NOTE: The maintainers of this project did not agree that this issue is a vulnerability and considered it a bug.","status":"published","published":"2026-06-29T14:16:40.593Z","modified":"2026-10-26T11:47:34.197714808Z","cvss":[{"version":"3.1","score":7.8,"vector":"CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H","level":"high"}],"updated_at":"2026-11-02T15:45:51.374409Z"},{"id":"OESA-2026-3039","title":"libxml2 security update","description":"This library allows to manipulate XML files. It includes support to read, modify and write XML and HTML files. There is DTDs support this includes parsing and validation even with complex DtDs, either at parse time or later once the document has been modified. The output can be a simple SAX stream or and in-memory DOM like representations. In this case one can use the built-in XPath and XPointer implementation to select sub nodes or ranges. A flexible Input/Output mechanism is available, with existing HTTP and FTP modules and combined to an URI library.\r\n\r\nSecurity Fix(es):\n\nlibxml2 is vulnerable to multiple stack-based buffer overflows in the xmlcatalog utility when running in --shell mode. The usershell() function processes user input using fixed-size stack buffers without proper bounds checking.\nBy supplying an overly long input line, an attacker can overflow internal buffers (command, arg, and argv) during input parsing. This results in memory corruption within the stack frame.\nSuccessful exploitation may cause a crash or potentially allow arbitrary code execution in the context of the xmlcatalog process.\n\nThis issue has been fixed in the commit c2e233fc.\n\nNOTE:\nThe maintainers of this project did not agree that this issue is a vulnerability and considered it a bug.(CVE-2026-11979)","status":"published","published":"2026-07-19T11:11:56Z","modified":"2026-08-18T01:21:20.247383798Z","cvss":[{"version":"3.1","score":7.8,"vector":"CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H","level":"high"}],"updated_at":"2026-11-02T15:52:46.823443Z"},{"id":"RHSA-2026:33840","title":"Red Hat Security Advisory: Red Hat Hardened Images RPMs Security Update","status":"published","published":"2026-07-01T10:19:52Z","modified":"2026-10-15T10:17:10Z","cvss":[{"version":"3.1","score":5.9,"vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H","level":"medium"}],"updated_at":"2026-11-02T15:53:19.963895Z"},{"id":"RHSA-2026:60394","title":"Red Hat Security Advisory: libxml2 security update","status":"published","published":"2026-08-27T10:16:16Z","modified":"2026-10-15T10:22:50Z","cvss":[{"version":"3.1","score":5.9,"vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H","level":"medium"}],"updated_at":"2026-11-02T15:53:21.91255Z"},{"id":"RHSA-2026:61247","title":"Red Hat Security Advisory: libxml2 security update","status":"published","published":"2026-08-31T10:12:07Z","modified":"2026-10-15T10:22:55Z","cvss":[{"version":"3.1","score":5.9,"vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H","level":"medium"}],"updated_at":"2026-11-02T15:53:21.91255Z"},{"id":"RHSA-2026:61248","title":"Red Hat Security Advisory: libxml2 security update","status":"published","published":"2026-08-31T10:12:07Z","modified":"2026-10-15T10:22:56Z","cvss":[{"version":"3.1","score":5.9,"vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H","level":"medium"}],"updated_at":"2026-11-02T15:53:21.91255Z"},{"id":"RLSA-2026:60394","title":"Moderate: libxml2 security update","description":"The libxml2 library is a development toolbox providing the implementation of various XML standards.\n\nSecurity Fix(es):\n\n* libxml2: libxml2: Arbitrary code execution in xmlcatalog utility via buffer overflow (CVE-2026-11979)\n\nFor more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and other related information, refer to the CVE page(s) listed in the References section.","status":"published","published":"2026-08-28T12:08:28.834117Z","modified":"2026-08-28T12:30:02.646676252Z","cvss":[{"version":"3.1","score":4.8,"vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:R/S:U/C:L/I:L/A:L","level":"medium"}],"updated_at":"2026-11-02T15:53:26.111232Z"},{"id":"RLSA-2026:61247","title":"Moderate: libxml2 security update","description":"The libxml2 library is a development toolbox providing the implementation of various XML standards.\n\nSecurity Fix(es):\n\n* libxml2: mingw-libxml2: libxml2: Denial of Service via crafted XML input due to use-after-free (CVE-2026-6653)\n\n* libxml2: libxml2: Arbitrary code execution in xmlcatalog utility via buffer overflow (CVE-2026-11979)\n\nFor more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and other related information, refer to the CVE page(s) listed in the References section.","status":"published","published":"2026-08-31T12:05:35.058762Z","modified":"2026-08-31T12:30:02.707848518Z","cvss":[{"version":"3.1","score":5.9,"vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H","level":"medium"}],"updated_at":"2026-11-02T15:53:26.111232Z"},{"id":"RLSA-2026:61248","title":"Moderate: libxml2 security update","description":"The libxml2 library is a development toolbox providing the implementation of various XML standards.\n\nSecurity Fix(es):\n\n* libxml2: libxml2: Arbitrary code execution in xmlcatalog utility via buffer overflow (CVE-2026-11979)\n\nFor more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and other related information, refer to the CVE page(s) listed in the References section.","status":"published","published":"2026-08-31T12:01:18.720066Z","modified":"2026-08-31T12:30:02.701045444Z","cvss":[{"version":"3.1","score":4.8,"vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:R/S:U/C:L/I:L/A:L","level":"medium"}],"updated_at":"2026-11-02T15:53:26.111232Z"},{"id":"UBUNTU-CVE-2026-11979","description":"libxml2 is vulnerable to multiple stack-based buffer overflows in the xmlcatalog utility when running in --shell mode. The usershell() function processes user input using fixed-size stack buffers without proper bounds checking. By supplying an overly long input line, an attacker can overflow internal buffers (command, arg, and argv) during input parsing. This results in memory corruption within the stack frame. Successful exploitation may cause a crash or potentially allow arbitrary code execution in the context of the xmlcatalog process. This issue has been fixed in the commit c2e233fc. NOTE: The maintainers of this project did not agree that this issue is a vulnerability and considered it a bug.","status":"published","published":"2026-06-29T14:16:00Z","modified":"2026-10-09T01:45:17.197547634Z","cvss":[{"version":"4.0","score":1.8,"vector":"CVSS:4.0/AV:L/AC:L/AT:P/PR:N/UI:A/VC:N/VI:N/VA:L/SC:L/SI:L/SA:N","level":"low"},{"version":"3.1","score":7.8,"vector":"CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H","level":"high"}],"updated_at":"2026-11-02T16:56:00.081948Z"},{"id":"ALSA-2026:60394","title":"Moderate: libxml2 security update","description":"The libxml2 library is a development toolbox providing the implementation of various XML standards.  \n\nSecurity Fix(es):  \n\n  * libxml2: libxml2: Arbitrary code execution in xmlcatalog utility via buffer overflow (CVE-2026-11979)\n\n\nFor more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and other related information, refer to the CVE page(s) listed in the References section.\n","status":"published","published":"2026-08-26T00:00:00Z","modified":"2026-10-29T11:30:47.797695075Z","updated_at":"2026-11-02T15:27:54.753319Z"},{"id":"ALSA-2026:61247","title":"Moderate: libxml2 security update","description":"The libxml2 library is a development toolbox providing the implementation of various XML standards.  \n\nSecurity Fix(es):  \n\n  * libxml2: mingw-libxml2: libxml2: Denial of Service via crafted XML input due to use-after-free (CVE-2026-6653)\n  * libxml2: libxml2: Arbitrary code execution in xmlcatalog utility via buffer overflow (CVE-2026-11979)\n\n\nFor more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and other related information, refer to the CVE page(s) listed in the References section.\n","status":"published","published":"2026-08-31T00:00:00Z","modified":"2026-10-29T11:32:31.60004447Z","updated_at":"2026-11-02T15:27:54.753319Z"},{"id":"ALSA-2026:61248","title":"Moderate: libxml2 security update","description":"The libxml2 library is a development toolbox providing the implementation of various XML standards.  \n\nSecurity Fix(es):  \n\n  * libxml2: libxml2: Arbitrary code execution in xmlcatalog utility via buffer overflow (CVE-2026-11979)\n\n\nFor more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and other related information, refer to the CVE page(s) listed in the References section.\n","status":"published","published":"2026-08-31T00:00:00Z","modified":"2026-10-29T11:02:25.093133142Z","updated_at":"2026-11-02T15:27:54.753319Z"},{"id":"CLSA-2026-1782998484","title":"libxml2: Fix of CVE-2026-11979","description":"- CVE-2026-11979: add bounds checks in xmlcatalog usershell() to prevent\n  stack-based buffer overflow on long --shell input","status":"published","published":"2026-07-02T13:21:40Z","modified":"2026-10-26T09:30:24.992892515Z","updated_at":"2026-11-02T15:43:45.794021Z"},{"id":"CLSA-2026-1783006034","title":"Fix CVE(s): CVE-2026-11979","description":"   * SECURITY UPDATE: stack-based buffer overflows in the xmlcatalog utility\n     interactive --shell mode\n     - debian/patches/CVE-2026-11979.patch: Add bounds checks in usershell() in\n       xmlcatalog.c so the command, arg and argv fixed-size stack buffers are not\n       overflowed by an overly long --shell input line\n     - CVE-2026-11979","status":"published","published":"2026-07-02T15:27:30Z","modified":"2026-10-26T09:32:03.332130228Z","updated_at":"2026-11-02T15:43:45.794021Z"},{"id":"CLSA-2026-1783076182","title":"libxml2: Fix of CVE-2026-11979","description":"- CVE-2026-11979: add overflow checks for large xmlcatalog --shell\n  commands in usershell()","status":"published","published":"2026-07-03T10:56:38Z","modified":"2026-10-26T09:31:37.64815313Z","updated_at":"2026-11-02T15:43:45.794021Z"},{"id":"CLSA-2026-1783076452","title":"Fix CVE(s): CVE-2026-11979","description":"   * SECURITY UPDATE: buffer overflow in xmlcatalog --shell interactive mode\n     - debian/patches/CVE-2026-11979.patch: add overflow checks for large\n       commands, args and argv in usershell() in xmlcatalog.c\n     - CVE-2026-11979","status":"published","published":"2026-07-03T11:01:08Z","modified":"2026-10-26T09:31:46.801698665Z","updated_at":"2026-11-02T15:43:45.794021Z"},{"id":"CLSA-2026-1783093006","title":"libxml2: Fix of CVE-2026-11979","description":"- CVE-2026-11979: add bounds checks in xmlcatalog --shell usershell() to\n  prevent stack buffer overflows when parsing overly long command lines","status":"published","published":"2026-07-03T15:37:02Z","modified":"2026-10-26T09:31:46.145299243Z","updated_at":"2026-11-02T15:43:45.794021Z"},{"id":"CLSA-2026-1783093248","title":"libxml2: Fix of CVE-2026-11979","description":"- CVE-2026-11979: add bounds checks in xmlcatalog --shell usershell() to\n  prevent stack buffer overflows when parsing overly long command lines","status":"published","published":"2026-07-07T14:00:20Z","modified":"2026-10-26T09:31:39.311559952Z","updated_at":"2026-11-02T15:43:45.794021Z"},{"id":"CLSA-2026-1783095251","title":"Fix CVE(s): CVE-2026-11979","description":"   * SECURITY UPDATE: stack buffer overflows in xmlcatalog --shell mode\n     - debian/patches/CVE-2026-11979.patch: add bounds checks in the\n       usershell() command-line parser in xmlcatalog.c to prevent stack\n       buffer overflows when parsing overly long command lines\n     - CVE-2026-11979","status":"published","published":"2026-07-03T16:14:28Z","modified":"2026-10-26T09:31:52.322180291Z","updated_at":"2026-11-02T15:43:45.794021Z"},{"id":"CLSA-2026-1783095447","title":"Fix CVE(s): CVE-2026-11979","description":"   * SECURITY UPDATE: stack buffer overflows in xmlcatalog --shell mode\n     - debian/patches/CVE-2026-11979.patch: add bounds checks in the\n       usershell() command-line parser in xmlcatalog.c to prevent stack\n       buffer overflows when parsing overly long command lines\n     - CVE-2026-11979","status":"published","published":"2026-07-03T16:17:43Z","modified":"2026-10-26T09:32:05.222662077Z","updated_at":"2026-11-02T15:43:45.794021Z"},{"id":"CLSA-2026-1783587336","title":"libxml2: Fix of CVE-2026-11979","description":"- CVE-2026-11979: add bounds checks in xmlcatalog --shell usershell() to\n  prevent stack buffer overflows when parsing overly long command lines","status":"published","published":"2026-07-09T10:06:38Z","modified":"2026-10-26T09:31:42.103183569Z","updated_at":"2026-11-02T15:43:46.151924Z"},{"id":"CLSA-2026-1783587973","title":"libxml2: Fix of CVE-2026-11979","description":"- CVE-2026-11979: add bounds checks in xmlcatalog --shell usershell() to\n  prevent stack buffer overflows when parsing overly long command lines","status":"published","published":"2026-07-09T09:06:29Z","modified":"2026-10-26T09:31:58.189007842Z","updated_at":"2026-11-02T15:43:46.151924Z"},{"id":"CLSA-2026-1783588204","title":"libxml2: Fix of CVE-2026-11979","description":"- CVE-2026-11979: add bounds checks in xmlcatalog --shell usershell() to\n  prevent stack buffer overflows when parsing overly long command lines","status":"published","published":"2026-07-09T09:10:20Z","modified":"2026-10-26T09:31:55.40626978Z","updated_at":"2026-11-02T15:43:46.151924Z"},{"id":"CLSA-2026-1783632090","title":"libxml2: Fix of CVE-2026-11979","description":"- CVE-2026-11979.patch: add overflow checks for large xmlcatalog --shell\n  commands in usershell()","status":"published","published":"2026-07-09T21:21:47Z","modified":"2026-10-26T09:31:49.719901208Z","updated_at":"2026-11-02T15:43:46.151924Z"},{"id":"CLSA-2026-1783670609","title":"libxml2: Fix of CVE-2026-11979","description":"- CVE-2026-11979.patch: add overflow checks for large xmlcatalog --shell\n  commands in usershell()","status":"published","published":"2026-07-10T08:03:44Z","modified":"2026-10-26T09:31:51.133933242Z","updated_at":"2026-11-02T15:43:46.151924Z"},{"id":"CLSA-2026-1783948495","title":"libxml2: Fix of CVE-2026-11979","description":"- CVE-2026-11979: add bounds checks in xmlcatalog usershell() to prevent\n  stack-based buffer overflow on long --shell input","status":"published","published":"2026-07-13T13:15:12Z","modified":"2026-10-26T09:31:14.886474243Z","updated_at":"2026-11-02T15:43:46.151924Z"},{"id":"MGASA-2026-0459","title":"Updated libxml2 packages fix security vulnerabilities","description":"The updated packages fix several security issues:\nStack-Based Buffer Overflow in libxml2. (CVE-2026-11979)\nIn libxml2 before 2.15.4, xmlFAParsePosCharGroup has an out-of-bounds\nread, aka an out-of-bounds read in the NXT macro in xmlregexp.\n(CVE-2026-86137)\nIn libxml2 before 2.15.4, xmlDictAddQString in dict.c has an integer\noverflow and resultant heap-based buffer overflow. (CVE-2026-86138)\nIn libxml2 before 2.15.4, xmlURIEscapeStr in uri.c has an integer\noverflow. (CVE-2026-86139)\nIn libxml2 before 2.15.4, xmlSnprintfElements in valid.c has a strcat\nstack-based buffer overflow. (CVE-2026-86140)\nxmlregexp in libxml2 before 2.15.4 has a NULL pointer dereference in\nxmlRegNewParserCtxt after a strdup failure, i.e., it does not calculate\na string length after NULL checking. (CVE-2026-86141)\nIn libxml2 before 2.15.4, there is a heap-based buffer overflow in\nxmlXPtrEvalXPtrPart because of xmlXPtrEval xpointer length saturation.\n(CVE-2026-86142)\nIn xmlIO in libxml2 before 2.15.4, an inconsistency in\nxmlOutputWriteCallback and xmlBufUse causes negative lengths to reach\nwrite callbacks, aka a lack of a check for integer overflow before\ncalling writecallback. This has security relevance for many types of\nuses of that length value within a callback. (CVE-2026-86143)\nIn xinclude in libxml2 before 2.15.4, xmlXIncludeProcess and\nxmlXIncludeProcessTree do not propagate parseFlags. This has security\nrelevance for, for example, the XML_PARSE_NONET flag, if (without it) a\ncustom resource loader accesses the internet and triggers XML external\nentity injection, SSRF, or a denial of service (e.g., for an\nattacker-controlled internet resource that is intentionally slow).\n(CVE-2026-86144)\n","status":"published","published":"2026-09-28T17:04:04Z","modified":"2026-09-28T17:15:03.661029458Z","updated_at":"2026-11-02T15:49:43.795591Z"},{"id":"openSUSE-SU-2026:11258-1","title":"libxml2-16-2.15.3-2.1 on GA media","description":"These are all security issues fixed in the libxml2-16-2.15.3-2.1 package on the GA media of openSUSE Tumbleweed.","status":"published","published":"2026-07-12T00:00:00Z","modified":"2026-07-13T09:00:11.045139252Z","updated_at":"2026-11-02T16:58:38.95195Z"},{"id":"openSUSE-SU-2026:21317-1","title":"Security update for libxml2","description":"This update for libxml2 fixes the following issues\n\n- CVE-2026-6732: crafted XSD-validated document can cause a denial of service (bsc#1262719).\n- CVE-2026-11979: stack-based buffer overflows in the `xmlcatalog` utility when running in `--shell` mode (bsc#1269790).\n","status":"published","published":"2026-07-13T07:51:58Z","modified":"2026-07-15T18:24:12.674113688Z","updated_at":"2026-11-02T16:58:41.885092Z"},{"id":"SUSE-SU-2026:22596-1","title":"Security update for libxml2","description":"This update for libxml2 fixes the following issues\n\n- CVE-2026-6732: crafted XSD-validated document can cause a denial of service (bsc#1262719).\n- CVE-2026-11979: stack-based buffer overflows in the `xmlcatalog` utility when running in `--shell` mode (bsc#1269790).\n","status":"published","published":"2026-07-13T07:52:15Z","modified":"2026-07-16T18:24:37.995537011Z","updated_at":"2026-11-02T15:54:03.080707Z"},{"id":"SUSE-SU-2026:22636-1","title":"Security update for libxml2","description":"This update for libxml2 fixes the following issues\n\n- CVE-2026-6732: crafted XSD-validated document can cause a denial of service (bsc#1262719).\n- CVE-2026-11979: stack-based buffer overflows in the `xmlcatalog` utility when running in `--shell` mode (bsc#1269790).\n","status":"published","published":"2026-07-13T07:52:15Z","modified":"2026-07-17T18:24:03.925260747Z","updated_at":"2026-11-02T15:54:03.080707Z"},{"id":"SUSE-SU-2026:22806-1","title":"Security update for libxml2","description":"This update for libxml2 fixes the following issue\n\n- CVE-2026-11979: stack-based buffer overflows in the `xmlcatalog` utility when running in `--shell` mode (bsc#1269790).\n","status":"published","published":"2026-07-22T08:36:01Z","modified":"2026-07-28T18:24:06.417388575Z","updated_at":"2026-11-02T15:54:03.080707Z"},{"id":"SUSE-SU-2026:22894-1","title":"Security update for libxml2","description":"This update for libxml2 fixes the following issue\n\n- CVE-2026-11979: stack-based buffer overflows in the `xmlcatalog` utility when running in `--shell` mode (bsc#1269790).\n","status":"published","published":"2026-07-22T09:00:00Z","modified":"2026-07-28T18:24:14.077500483Z","updated_at":"2026-11-02T15:54:03.080707Z"},{"id":"SUSE-SU-2026:3095-1","title":"Security update for libxml2","description":"This update for libxml2 fixes the following issue\n\n- CVE-2026-11979: stack-based buffer overflows in the `xmlcatalog` utility when running in `--shell` mode (bsc#1269790).\n","status":"published","published":"2026-07-17T11:38:33Z","modified":"2026-07-18T08:45:09.836597735Z","updated_at":"2026-11-02T15:54:04.987808Z"},{"id":"SUSE-SU-2026:3096-1","title":"Security update for libxml2","description":"This update for libxml2 fixes the following issue\n\n- CVE-2026-11979: stack-based buffer overflows in the `xmlcatalog` utility when running in `--shell` mode (bsc#1269790).\n","status":"published","published":"2026-07-17T11:39:16Z","modified":"2026-07-18T08:45:08.675321907Z","updated_at":"2026-11-02T15:54:04.987808Z"},{"id":"SUSE-SU-2026:3097-1","title":"Security update for libxml2","description":"This update for libxml2 fixes the following issue\n\n- CVE-2026-11979: stack-based buffer overflows in the `xmlcatalog` utility when running in `--shell` mode (bsc#1269790).\n","status":"published","published":"2026-07-17T11:39:38Z","modified":"2026-07-18T08:45:09.733972968Z","updated_at":"2026-11-02T15:54:04.987808Z"},{"id":"SUSE-SU-2026:3111-1","title":"Security update for libxml2","description":"This update for libxml2 fixes the following issue\n\n- CVE-2026-11979: stack-based buffer overflows in the `xmlcatalog` utility when running in `--shell` mode (bsc#1269790).\n","status":"published","published":"2026-07-17T14:17:57Z","modified":"2026-07-18T08:45:10.070067042Z","updated_at":"2026-11-02T15:54:04.987808Z"}]}}