{"id":"CVE-2026-95520","aliases":["AZL-105813","DEBIAN-CVE-2026-95520","EUVD-2026-88733","GHSA-4hhr-mf67-g46r","UBUNTU-CVE-2026-95520"],"status":"published","title":"Rpm: rpm: integer overflow in iterreadarchivenext() leads to heap-based buffer overflow when parsing untrusted rpm packages","description":"A heap-based buffer overflow flaw was found in rpm. Parsing a symlink entry in an untrusted RPM package whose declared RPMTAG_LONGFILESIZES value is 0xFFFFFFFFFFFFFFFF causes an integer overflow in iterReadArchiveNext() that shrinks a buffer allocation to one byte, after which the payload's independently-controlled cpio filesize field is used to write attacker-controlled data past the end of that allocation. This is reachable via rpm2cpio, rpm2archive, and rpm -qlvp on an  untrusted package.","severity":{"version":"3.1","score":7.1,"vector":"CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:H/A:H","level":"high","assessor":"cna","from":"cve"},"epss":{"day":"2026-11-11","score":0.00119,"percentile":0.0181,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":false},"cwes":["CWE-787"],"published":"2026-09-29T11:02:06Z","modified":"2026-11-06T07:38:05Z","affected":[{"source":"osv","ecosystem":"Azure Linux:3","package":"rpm","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"last_affected":"4.18.2-2"}]}]},{"source":"osv","ecosystem":"Debian:12","package":"rpm","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["4.18.0+dfsg-1","4.18.0+dfsg-1+deb12u1","4.18.2+dfsg-1","4.18.2+dfsg-1.1~exp1","4.18.2+dfsg-2","4.18.2+dfsg-2.1","4.18.2+dfsg-2.1~exp1","4.19.1.1+dfsg-1","4.19.1.1+dfsg-1~exp","4.20.0+dfsg-1","4.20.0+dfsg-2","4.20.0+dfsg-3","4.20.0+dfsg-4","4.20.1+dfsg-1","4.20.1+dfsg-2","4.20.1+dfsg-3","6.0.0-1","6.0.0-2","6.0.1-1","6.1.0-1"]},{"source":"osv","ecosystem":"Debian:13","package":"rpm","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["4.20.1+dfsg-3","6.0.0-1","6.0.0-2","6.0.1-1","6.1.0-1"]},{"source":"osv","ecosystem":"Debian:14","package":"rpm","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["4.20.1+dfsg-3","6.0.0-1","6.0.0-2","6.0.1-1","6.1.0-1"]},{"source":"osv","ecosystem":"Ubuntu:Pro:14.04:LTS","package":"rpm","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["4.11.1-2","4.11.1-3","4.11.1-3ubuntu0.1","4.11.1-3ubuntu0.1+esm1"]},{"source":"osv","ecosystem":"Ubuntu:Pro:16.04:LTS","package":"rpm","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["4.12.0.1+dfsg1-3build2","4.12.0.1+dfsg1-3build3","4.12.0.1+dfsg1-3ubuntu0.1~esm1"]},{"source":"osv","ecosystem":"Ubuntu:Pro:18.04:LTS","package":"rpm","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["4.12.0.2+dfsg1-2build2","4.14.0+dfsg1-2","4.14.1+dfsg1-2","4.14.1+dfsg1-2ubuntu0.1~esm1"]},{"source":"osv","ecosystem":"Ubuntu:Pro:20.04:LTS","package":"rpm","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["4.14.2.1+dfsg1-1","4.14.2.1+dfsg1-1build1","4.14.2.1+dfsg1-1build2","4.14.2.1+dfsg1-1ubuntu0.1~esm1"]},{"source":"osv","ecosystem":"Ubuntu:22.04:LTS","package":"rpm","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["4.16.1.2+dfsg1-3ubuntu1","4.16.1.2+dfsg1-3ubuntu3","4.17.0+dfsg1-1","4.17.0+dfsg1-3","4.17.0+dfsg1-4","4.17.0+dfsg1-4build1"]},{"source":"osv","ecosystem":"Ubuntu:24.04:LTS","package":"rpm","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["4.18.0+dfsg-1build1","4.18.0+dfsg-1build2","4.18.2+dfsg-1","4.18.2+dfsg-2","4.18.2+dfsg-2.1build1","4.18.2+dfsg-2.1build2"]},{"source":"osv","ecosystem":"Ubuntu:26.10","package":"rpm","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["6.0.1-1build1","6.1.0-1"]},{"source":"osv","ecosystem":"Ubuntu:26.04:LTS","package":"rpm","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["4.20.1+dfsg-3","6.0.0-2","6.0.1-1","6.0.1-1build1"]}],"products":[{"vendor":"red hat","product":"red hat enterprise linux 10"},{"vendor":"red hat","product":"red hat enterprise linux 6"},{"vendor":"red hat","product":"red hat enterprise linux 7"},{"vendor":"red hat","product":"red hat enterprise linux 8"},{"vendor":"red hat","product":"red hat enterprise linux 9"},{"vendor":"red hat","product":"red hat hardened images"},{"vendor":"red hat","product":"red hat openshift ai (rhoai)"}],"references":[{"url":"https://access.redhat.com/security/cve/CVE-2026-95520","tags":["vdb-entry","x_refsource_REDHAT","report"]},{"url":"https://bugzilla.redhat.com/show_bug.cgi?id=2537809","tags":["issue-tracking","x_refsource_REDHAT","report"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-95520","tags":["web"]},{"url":"https://github.com/advisories/GHSA-4hhr-mf67-g46r"},{"url":"https://security-tracker.debian.org/tracker/CVE-2026-95520","tags":["advisory"]},{"url":"https://ubuntu.com/security/CVE-2026-95520","tags":["report"]},{"url":"https://www.cve.org/CVERecord?id=CVE-2026-95520","tags":["report"]}],"sources":{"cve":[{"id":"CVE-2026-95520","title":"Rpm: rpm: integer overflow in iterreadarchivenext() leads to heap-based buffer overflow when parsing untrusted rpm packages","description":"A heap-based buffer overflow flaw was found in rpm. Parsing a symlink entry in an untrusted RPM package whose declared RPMTAG_LONGFILESIZES value is 0xFFFFFFFFFFFFFFFF causes an integer overflow in iterReadArchiveNext() that shrinks a buffer allocation to one byte, after which the payload's independently-controlled cpio filesize field is used to write attacker-controlled data past the end of that allocation. This is reachable via rpm2cpio, rpm2archive, and rpm -qlvp on an  untrusted package.","status":"published","published":"2026-09-29T11:02:06.457Z","modified":"2026-11-06T07:38:05.396Z","cvss":[{"version":"3.1","score":7.1,"vector":"CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:H/A:H","level":"high","assessor":"cna"}],"cwes":["CWE-787"],"updated_at":"2026-11-06T08:57:32.08691Z"}],"euvd":[{"id":"EUVD-2026-88733","description":"A heap-based buffer overflow flaw was found in rpm. Parsing a symlink entry in an untrusted RPM package whose declared RPMTAG_LONGFILESIZES value is 0xFFFFFFFFFFFFFFFF causes an integer overflow in iterReadArchiveNext() that shrinks a buffer allocation to one byte, after which the payload's independently-controlled cpio filesize field is used to write attacker-controlled data past the end of that allocation. This is reachable via rpm2cpio, rpm2archive, and rpm -qlvp on an  untrusted package.","status":"published","published":"2026-09-29T11:02:06Z","modified":"2026-11-06T07:38:05Z","cvss":[{"version":"3.1","score":7.1,"vector":"CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:H/A:H","level":"high"}],"updated_at":"2026-11-06T09:04:28.113071Z"}],"ghsa":[{"id":"GHSA-4hhr-mf67-g46r","title":"A heap-based buffer overflow flaw was found in rpm. Parsing a symlink entry in an untrusted RPM...","description":"A heap-based buffer overflow flaw was found in rpm. Parsing a symlink entry in an untrusted RPM package whose declared RPMTAG_LONGFILESIZES value is 0xFFFFFFFFFFFFFFFF causes an integer overflow in iterReadArchiveNext() that shrinks a buffer allocation to one byte, after which the payload's independently-controlled cpio filesize field is used to write attacker-controlled data past the end of that allocation. This is reachable via rpm2cpio, rpm2archive, and rpm -qlvp on an  untrusted package.","status":"published","published":"2026-09-29T12:31:32Z","modified":"2026-09-29T12:31:39Z","cvss":[{"version":"3.1","score":7.1,"vector":"CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:H/A:H","level":"high"}],"cwes":["CWE-787"],"updated_at":"2026-11-02T15:12:33.186319Z"}],"nvd":[{"id":"CVE-2026-95520","description":"A heap-based buffer overflow flaw was found in rpm. Parsing a symlink entry in an untrusted RPM package whose declared RPMTAG_LONGFILESIZES value is 0xFFFFFFFFFFFFFFFF causes an integer overflow in iterReadArchiveNext() that shrinks a buffer allocation to one byte, after which the payload's independently-controlled cpio filesize field is used to write attacker-controlled data past the end of that allocation. This is reachable via rpm2cpio, rpm2archive, and rpm -qlvp on an  untrusted package.","status":"published","published":"2026-09-29T12:17:12.65Z","modified":"2026-11-06T08:17:39.483Z","cvss":[{"version":"3.1","score":7.1,"vector":"CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:H/A:H","level":"high","assessor":"secondary"}],"cwes":["CWE-787"],"updated_at":"2026-11-06T11:59:57.419913Z"}],"osv":[{"id":"DEBIAN-CVE-2026-95520","description":"A heap-based buffer overflow flaw was found in rpm. Parsing a symlink entry in an untrusted RPM package whose declared RPMTAG_LONGFILESIZES value is 0xFFFFFFFFFFFFFFFF causes an integer overflow in iterReadArchiveNext() that shrinks a buffer allocation to one byte, after which the payload's independently-controlled cpio filesize field is used to write attacker-controlled data past the end of that allocation. This is reachable via rpm2cpio, rpm2archive, and rpm -qlvp on an  untrusted package.","status":"published","published":"2026-09-29T12:17:12.65Z","modified":"2026-11-07T09:47:30.063909498Z","cvss":[{"version":"3.1","score":7.1,"vector":"CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:H/A:H","level":"high"}],"updated_at":"2026-11-07T10:14:39.995311Z"},{"id":"UBUNTU-CVE-2026-95520","description":"A heap-based buffer overflow flaw was found in rpm. Parsing a symlink entry in an untrusted RPM package whose declared RPMTAG_LONGFILESIZES value is 0xFFFFFFFFFFFFFFFF causes an integer overflow in iterReadArchiveNext() that shrinks a buffer allocation to one byte, after which the payload's independently-controlled cpio filesize field is used to write attacker-controlled data past the end of that allocation. This is reachable via rpm2cpio, rpm2archive, and rpm -qlvp on an  untrusted package.","status":"published","published":"2026-09-29T12:17:00Z","modified":"2026-10-17T13:01:20.102567617Z","cvss":[{"version":"3.1","score":7.1,"vector":"CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:H/A:H","level":"high"}],"updated_at":"2026-11-02T16:57:44.071534Z"},{"id":"AZL-105813","title":"CVE-2026-95520 affecting package rpm 4.18.2-2","description":"A heap-based buffer overflow flaw was found in rpm. Parsing a symlink entry in an untrusted RPM package whose declared RPMTAG_LONGFILESIZES value is 0xFFFFFFFFFFFFFFFF causes an integer overflow in iterReadArchiveNext() that shrinks a buffer allocation to one byte, after which the payload's independently-controlled cpio filesize field is used to write attacker-controlled data past the end of that allocation. This is reachable via rpm2cpio, rpm2archive, and rpm -qlvp on an  untrusted package.","status":"published","published":"2026-09-29T12:17:12Z","modified":"2026-11-05T05:40:51Z","updated_at":"2026-11-05T16:41:17.719431Z"}]}}