{"id":"CVE-2026-17591","aliases":["AZL-109785","AZL-109788","BELL-CVE-2026-17591","DEBIAN-CVE-2026-17591","EUVD-2026-103190","GHSA-x7v4-6qhp-jg74","OESA-2026-4415","OESA-2026-4547","OESA-2026-4548","OESA-2026-4549","RHSA-2026:77775","UBUNTU-CVE-2026-17591"],"status":"published","title":"Libarchive: libarchive: use-after-free via aliased mac metadata copy","description":"A flaw was found in libarchive. An attacker can cause a Denial of Service (DoS) or potential information disclosure due to a use-after-free vulnerability, which occurs when a program reads memory that has already been released. This issue arises when the archive_entry_copy_mac_metadata() function deallocates an internal buffer before completing a data copy. An attacker who can supply input to an application utilizing this function can trigger the flaw to crash the application or read uninitialized memory 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(rhoai)"}],"references":[{"url":"https://access.redhat.com/errata/RHSA-2026:77775","tags":["vendor-advisory","x_refsource_REDHAT","advisory"]},{"url":"https://access.redhat.com/security/cve/CVE-2026-17591","tags":["vdb-entry","x_refsource_REDHAT","report"]},{"url":"https://bugzilla.redhat.com/show_bug.cgi?id=2554209","tags":["issue-tracking","x_refsource_REDHAT","report"]},{"url":"https://github.com/libarchive/libarchive/pull/3318","tags":["article","report"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-17591","tags":["web","advisory"]},{"url":"https://github.com/advisories/GHSA-x7v4-6qhp-jg74"},{"url":"https://docs.bell-sw.com/security/cves/CVE-2026-17591","tags":["advisory"]},{"url":"https://security-tracker.debian.org/tracker/CVE-2026-17591","tags":["advisory"]},{"url":"https://www.openeuler.org/zh/security/security-bulletins/detail/?id=openEuler-SA-2026-4415","tags":["advisory"]},{"url":"https://www.openeuler.org/zh/security/security-bulletins/detail/?id=openEuler-SA-2026-4547","tags":["advisory"]},{"url":"https://www.openeuler.org/zh/security/security-bulletins/detail/?id=openEuler-SA-2026-4548","tags":["advisory"]},{"url":"https://www.openeuler.org/zh/security/security-bulletins/detail/?id=openEuler-SA-2026-4549","tags":["advisory"]},{"url":"https://images.redhat.com/","tags":["article"]},{"url":"https://access.redhat.com/security/updates/classification/","tags":["article"]},{"url":"https://security.access.redhat.com/data/csaf/v2/advisories/2026/rhsa-2026_77775.json","tags":["advisory"]},{"url":"https://www.cve.org/CVERecord?id=CVE-2026-17591","tags":["advisory","report"]},{"url":"https://ubuntu.com/security/CVE-2026-17591","tags":["report"]}],"sources":{"cve":[{"id":"CVE-2026-17591","title":"Libarchive: libarchive: use-after-free via aliased mac metadata copy","description":"A flaw was found in libarchive. An attacker can cause a Denial of Service (DoS) or potential information disclosure due to a use-after-free vulnerability, which occurs when a program reads memory that has already been released. This issue arises when the archive_entry_copy_mac_metadata() function deallocates an internal buffer before completing a data copy. An attacker who can supply input to an application utilizing this function can trigger the flaw to crash the application or read uninitialized memory data.","status":"published","published":"2026-10-16T22:03:40.603Z","modified":"2026-11-06T18:08:38.984Z","cvss":[{"version":"3.1","score":3.6,"vector":"CVSS:3.1/AV:L/AC:H/PR:N/UI:R/S:U/C:L/I:N/A:L","level":"low","assessor":"cna"}],"cwes":["CWE-416"],"updated_at":"2026-11-06T19:59:19.701997Z"}],"euvd":[{"id":"EUVD-2026-103190","description":"A flaw was found in libarchive. An attacker can cause a Denial of Service (DoS) or potential information disclosure due to a use-after-free vulnerability, which occurs when a program reads memory that has already been released. This issue arises when the archive_entry_copy_mac_metadata() function deallocates an internal buffer before completing a data copy. An attacker who can supply input to an application utilizing this function can trigger the flaw to crash the application or read uninitialized memory data.","status":"published","published":"2026-10-16T22:03:40Z","modified":"2026-11-06T18:08:38Z","cvss":[{"version":"3.1","score":3.6,"vector":"CVSS:3.1/AV:L/AC:H/PR:N/UI:R/S:U/C:L/I:N/A:L","level":"low"}],"updated_at":"2026-11-06T19:05:52.672747Z"}],"ghsa":[{"id":"GHSA-x7v4-6qhp-jg74","title":"A flaw was found in libarchive. An attacker can cause a Denial of Service (DoS) or potential...","description":"A flaw was found in libarchive. An attacker can cause a Denial of Service (DoS) or potential information disclosure due to a use-after-free vulnerability, which occurs when a program reads memory that has already been released. This issue arises when the archive_entry_copy_mac_metadata() function deallocates an internal buffer before completing a data copy. An attacker who can supply input to an application utilizing this function can trigger the flaw to crash the application or read uninitialized memory data.","status":"published","published":"2026-10-17T00:31:19Z","modified":"2026-10-17T18:31:09Z","cvss":[{"version":"3.1","score":3.6,"vector":"CVSS:3.1/AV:L/AC:H/PR:N/UI:R/S:U/C:L/I:N/A:L","level":"low"}],"cwes":["CWE-416"],"updated_at":"2026-11-02T15:13:53.726362Z"}],"nvd":[{"id":"CVE-2026-17591","description":"A flaw was found in libarchive. An attacker can cause a Denial of Service (DoS) or potential information disclosure due to a use-after-free vulnerability, which occurs when a program reads memory that has already been released. This issue arises when the archive_entry_copy_mac_metadata() function deallocates an internal buffer before completing a data copy. An attacker who can supply input to an application utilizing this function can trigger the flaw to crash the application or read uninitialized memory data.","status":"published","published":"2026-10-16T23:17:01.42Z","modified":"2026-11-06T19:17:46.67Z","cvss":[{"version":"3.1","score":3.6,"vector":"CVSS:3.1/AV:L/AC:H/PR:N/UI:R/S:U/C:L/I:N/A:L","level":"low","assessor":"secondary"}],"cwes":["CWE-416"],"updated_at":"2026-11-06T22:02:14.293692Z"}],"osv":[{"id":"BELL-CVE-2026-17591","status":"published","published":"2026-10-17T06:05:37.583112Z","modified":"2026-10-28T07:15:06.594384827Z","cvss":[{"version":"3.1","score":3.6,"vector":"CVSS:3.1/AV:L/AC:H/PR:N/UI:R/S:U/C:L/I:N/A:L","level":"low"}],"updated_at":"2026-11-02T15:28:23.037038Z"},{"id":"DEBIAN-CVE-2026-17591","description":"A flaw was found in libarchive. An attacker can cause a Denial of Service (DoS) or potential information disclosure due to a use-after-free vulnerability, which occurs when a program reads memory that has already been released. This issue arises when the archive_entry_copy_mac_metadata() function deallocates an internal buffer before completing a data copy. An attacker who can supply input to an application utilizing this function can trigger the flaw to crash the application or read uninitialized memory data.","status":"published","published":"2026-10-16T23:17:01.42Z","modified":"2026-11-07T10:01:29.250812156Z","cvss":[{"version":"3.1","score":3.6,"vector":"CVSS:3.1/AV:L/AC:H/PR:N/UI:R/S:U/C:L/I:N/A:L","level":"low"}],"updated_at":"2026-11-07T10:13:34.340634Z"},{"id":"OESA-2026-4415","title":"libarchive security update","description":"is an open-source BSD-licensed C programming library that  provides streaming access to a variety of different archive formats, including tar, cpio, pax, zip, and ISO9660 images. The distribution  also includes bsdtar and bsdcpio, full-featured implementations of  tar and cpio that use .\r\n\r\nSecurity Fix(es):\n\nA flaw was found in libarchive. An attacker can cause a Denial of Service (DoS) or potential information disclosure due to a use-after-free vulnerability, which occurs when a program reads memory that has already been released. This issue arises when the archive_entry_copy_mac_metadata() function deallocates an internal buffer before completing a data copy. An attacker who can supply input to an application utilizing this function can trigger the flaw to crash the application or read uninitialized memory data.(CVE-2026-17591)","status":"published","published":"2026-10-22T14:34:53Z","modified":"2026-10-22T14:45:04.177701795Z","cvss":[{"version":"3.1","score":3.6,"vector":"CVSS:3.1/AV:L/AC:H/PR:N/UI:R/S:U/C:L/I:N/A:L","level":"low"}],"updated_at":"2026-11-02T15:52:47.981622Z"},{"id":"OESA-2026-4547","title":"libarchive security update","description":"is an open-source BSD-licensed C programming library that  provides streaming access to a variety of different archive formats, including tar, cpio, pax, zip, and ISO9660 images. The distribution  also includes bsdtar and bsdcpio, full-featured implementations of  tar and cpio that use .\r\n\r\nSecurity Fix(es):\n\nA flaw was found in libarchive. An attacker can cause a Denial of Service (DoS) or potential information disclosure due to a use-after-free vulnerability, which occurs when a program reads memory that has already been released. This issue arises when the archive_entry_copy_mac_metadata() function deallocates an internal buffer before completing a data copy. An attacker who can supply input to an application utilizing this function can trigger the flaw to crash the application or read uninitialized memory data.(CVE-2026-17591)","status":"published","published":"2026-10-29T09:02:48Z","modified":"2026-10-29T09:15:28.61787135Z","cvss":[{"version":"3.1","score":3.6,"vector":"CVSS:3.1/AV:L/AC:H/PR:N/UI:R/S:U/C:L/I:N/A:L","level":"low"}],"updated_at":"2026-11-02T15:52:47.981622Z"},{"id":"OESA-2026-4548","title":"libarchive security update","description":"is an open-source BSD-licensed C programming library that  provides streaming access to a variety of different archive formats, including tar, cpio, pax, zip, and ISO9660 images. The distribution  also includes bsdtar and bsdcpio, full-featured implementations of  tar and cpio that use .\r\n\r\nSecurity Fix(es):\n\nA flaw was found in libarchive. An attacker can cause a Denial of Service (DoS) or potential information disclosure due to a use-after-free vulnerability, which occurs when a program reads memory that has already been released. This issue arises when the archive_entry_copy_mac_metadata() function deallocates an internal buffer before completing a data copy. An attacker who can supply input to an application utilizing this function can trigger the flaw to crash the application or read uninitialized memory data.(CVE-2026-17591)","status":"published","published":"2026-10-29T09:02:48Z","modified":"2026-10-29T09:15:25.496511754Z","cvss":[{"version":"3.1","score":3.6,"vector":"CVSS:3.1/AV:L/AC:H/PR:N/UI:R/S:U/C:L/I:N/A:L","level":"low"}],"updated_at":"2026-11-02T15:52:47.981622Z"},{"id":"OESA-2026-4549","title":"libarchive security update","description":"is an open-source BSD-licensed C programming library that  provides streaming access to a variety of different archive formats, including tar, cpio, pax, zip, and ISO9660 images. The distribution  also includes bsdtar and bsdcpio, full-featured implementations of  tar and cpio that use .\r\n\r\nSecurity Fix(es):\n\nA flaw was found in libarchive. An attacker can cause a Denial of Service (DoS) or potential information disclosure due to a use-after-free vulnerability, which occurs when a program reads memory that has already been released. This issue arises when the archive_entry_copy_mac_metadata() function deallocates an internal buffer before completing a data copy. An attacker who can supply input to an application utilizing this function can trigger the flaw to crash the application or read uninitialized memory data.(CVE-2026-17591)","status":"published","published":"2026-10-29T09:02:49Z","modified":"2026-10-29T09:15:25.481555641Z","cvss":[{"version":"3.1","score":3.6,"vector":"CVSS:3.1/AV:L/AC:H/PR:N/UI:R/S:U/C:L/I:N/A:L","level":"low"}],"updated_at":"2026-11-02T15:52:47.981622Z"},{"id":"RHSA-2026:77775","title":"Red Hat Security Advisory: Red Hat Hardened Images RPMs bug fix and enhancement update","status":"published","published":"2026-10-18T10:04:47Z","modified":"2026-10-18T10:15:34.795609779Z","cvss":[{"version":"3.1","score":3.6,"vector":"CVSS:3.1/AV:L/AC:H/PR:N/UI:R/S:U/C:L/I:N/A:L","level":"low"}],"updated_at":"2026-11-02T15:53:23.547034Z"},{"id":"UBUNTU-CVE-2026-17591","description":"A flaw was found in libarchive. An attacker can cause a Denial of Service (DoS) or potential information disclosure due to a use-after-free vulnerability, which occurs when a program reads memory that has already been released. This issue arises when the archive_entry_copy_mac_metadata() function deallocates an internal buffer before completing a data copy. An attacker who can supply input to an application utilizing this function can trigger the flaw to crash the application or read uninitialized memory data.","status":"published","published":"2026-10-16T23:17:00Z","modified":"2026-10-28T20:15:46.907463854Z","cvss":[{"version":"3.1","score":3.6,"vector":"CVSS:3.1/AV:L/AC:H/PR:N/UI:R/S:U/C:L/I:N/A:L","level":"low"}],"updated_at":"2026-11-02T16:56:01.334185Z"},{"id":"AZL-109785","title":"CVE-2026-17591 affecting package cmake 3.30.3-15","description":"A flaw was found in libarchive. An attacker can cause a Denial of Service (DoS) or potential information disclosure due to a use-after-free vulnerability, which occurs when a program reads memory that has already been released. This issue arises when the archive_entry_copy_mac_metadata() function deallocates an internal buffer before completing a data copy. An attacker who can supply input to an application utilizing this function can trigger the flaw to crash the application or read uninitialized memory data.","status":"published","published":"2026-10-16T23:17:01Z","modified":"2026-10-27T05:36:16Z","updated_at":"2026-11-02T15:28:02.044071Z"},{"id":"AZL-109788","title":"CVE-2026-17591 affecting package libarchive 3.7.7-7","description":"A flaw was found in libarchive. An attacker can cause a Denial of Service (DoS) or potential information disclosure due to a use-after-free vulnerability, which occurs when a program reads memory that has already been released. This issue arises when the archive_entry_copy_mac_metadata() function deallocates an internal buffer before completing a data copy. An attacker who can supply input to an application utilizing this function can trigger the flaw to crash the application or read uninitialized memory data.","status":"published","published":"2026-10-16T23:17:01Z","modified":"2026-11-05T05:40:51Z","updated_at":"2026-11-05T16:41:18.42484Z"}]}}