{"id":"CVE-2026-72107","title":"kernel: dm era: fix out-of-bounds memory access for non-zero start sector (CVE-2026-72107)","summary":"A flaw was found in the Linux kernel's device-mapper (dm-era) component. This vulnerability arises from an incorrect calculation of writeset blocks, which can lead to an out-of-bounds memory access. An attacker could potentially exploit th…","severity":"medium","cvss":5.5,"cvssVector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H","cvssSource":"vendor","cwe":"CWE-125","vendor":"Red Hat","product":"Red Hat Enterprise Linux 9","affected":["enterprise_linux 10","enterprise_linux 6","enterprise_linux 8","enterprise_linux 9"],"published":"2026-08-15","updated":"2026-10-26","sourceUpdated":"2026-10-26T11:08:44+00:00","source":"CSAF","sourceUrl":"https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-72107.json","references":[{"url":"https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-72107.json"},{"url":"https://access.redhat.com/security/cve/CVE-2026-72107"},{"url":"https://bugzilla.redhat.com/show_bug.cgi?id=2516419"},{"url":"https://www.cve.org/CVERecord?id=CVE-2026-72107"},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-72107"},{"url":"https://kernelcve.org/list/?q=CVE-2026-72107"},{"url":"https://lore.kernel.org/linux-cve-announce/2026081526-CVE-2026-72107-0676@gregkh/T"},{"url":"https://git.kernel.org/stable/c/fe94a0b14010a3c267ff9a2508afb4f27ff1c5bf"},{"url":"https://git.kernel.org/stable/c/e3ffa8e492e5cdee62d916ee3e9244ccce2b73c5"},{"url":"https://git.kernel.org/stable/c/9946a7176bd8c25ddd6e5f1799c54e572ee6bf0f"},{"url":"https://git.kernel.org/stable/c/7e1822f83c5a1ee7b4a19e98edde8770a10b4c71"},{"url":"https://git.kernel.org/stable/c/db5f9b4601f0012038e5a2628aedec2f47933380"},{"url":"https://git.kernel.org/stable/c/1fcb5e29dd7a5b85adb9d8b539911741d878e829"},{"url":"https://git.kernel.org/stable/c/bafe3e720cdac38cd7ea4eb7852a8f2dbe1bbfe6"},{"url":"https://git.kernel.org/stable/c/a868196f03c2b19418ae3d2b69e195d668a271e5"}],"tags":["csaf","vex","red-hat","cve.org","score-dispute"],"epss":0.0065,"epssPercentile":0.50968,"ssvc":{"exploitation":"none","automatable":"no","technicalImpact":"total","timestamp":"2026-10-16T15:52:12.284460Z"},"scores":{"vendor":5.5,"cna":8.8},"ingestedAt":"2026-10-16T17:24:46.878Z","slug":"CVE-2026-72107","body":"## Overview\n\nA flaw was found in the Linux kernel's device-mapper (dm-era) component. This vulnerability arises from an incorrect calculation of writeset blocks, which can lead to an out-of-bounds memory access. An attacker could potentially exploit this to cause a denial of service or other undefined behavior due to memory corruption.\n\n## Vendor advisories\n\n- **Red Hat VEX** · Moderate · affected: Red Hat Enterprise Linux 10, Red Hat Enterprise Linux 6, Red Hat Enterprise Linux 8, Red Hat Enterprise Linux 9 · no fix planned: Red Hat Enterprise Linux 6, Red Hat Enterprise Linux 10, Red Hat Enterprise Linux 8, Red Hat Enterprise Linux 9 · updated 2026-10-26 · [vex](https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-72107.json)\n\n**kernel: dm era: fix out-of-bounds memory access for non-zero start sector** — rated Moderate by Red Hat. Released 2026-08-15, updated 2026-10-26.\n\nAffected:\n\n- Red Hat Enterprise Linux 10\n- Red Hat Enterprise Linux 6\n- Red Hat Enterprise Linux 8\n- Red Hat Enterprise Linux 9\n\nNo fix planned:\n\n- Red Hat Enterprise Linux 6\n- Red Hat Enterprise Linux 10\n- Red Hat Enterprise Linux 8\n- Red Hat Enterprise Linux 9\n\nNot affected:\n\n- Red Hat Enterprise Linux 7\n\n## Remediation\n\nOut of support scope\n\nWorkarounds / mitigations:\n\n- Mitigation for this issue is either not available or the currently available options don't meet the Red Hat Product Security criteria comprising ease of use and deployment, applicability to widespread installation base or stability.","depth":"sunlit","depthScore":30,"depthScoreParts":{"impact":30.3,"likelihood":0.1,"exploitation":0,"ransomware":0},"changes":[{"seq":229302,"id":"CVE-2026-72107","ts":1793019670590,"field":"cvss","old":"8.8","new":"5.5"},{"seq":229301,"id":"CVE-2026-72107","ts":1793019670590,"field":"severity","old":"high","new":"medium"}]}