{"id":"CVE-2026-98057","title":"In the Linux kernel, the following vulnerability has been resolved:\n\nring-buffer: Add checking nr_subbufs to persistent ring buffer validation\n\nSashiko reported that the code was using meta->nr_subbufs without making\nsure that it matched…","summary":"In the Linux kernel, the following vulnerability has been resolved:\n\nring-buffer: Add checking nr_subbufs to persistent ring buffer validation\n\nSashiko reported that the code was using meta->nr_subbufs without making\nsure that it matched…","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","cwe":["CWE-787"],"vendor":"Linux","product":"Linux","affected":["Linux >= 3ec743d558f111d8999aea24577ba66c65ee2eeb < f0467190e6a9fc61e343c8064ef16aad513788c3","Linux >= f5b95f1fa2ef3a03f49eeec658ba97e721412b32 < 69d502457e3f76142f7fcf6e2625e80e0ce8a60f","Linux >= f5b95f1fa2ef3a03f49eeec658ba97e721412b32 < 6c001a62c34f13fe1c6a24304c289b387d9e697d","Linux 0d547a6f5e8fad26ebc12f501d7d19fccdbad6bf","Linux >= 6.12.16 < 6.12.111","Linux >= 6.13.4 < 6.14","Linux 6.14"],"published":"2026-09-25","updated":"2026-10-15","sourceUpdated":"2026-10-15T11:18:10.673","source":"NVD","sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2026-98057","references":[{"url":"https://git.kernel.org/stable/c/364a31052aa9ef91db137f82d797366007cd85b7","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/69d502457e3f76142f7fcf6e2625e80e0ce8a60f","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/6c001a62c34f13fe1c6a24304c289b387d9e697d","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/f0467190e6a9fc61e343c8064ef16aad513788c3","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-98057.json"},{"url":"https://access.redhat.com/security/cve/CVE-2026-98057"},{"url":"https://bugzilla.redhat.com/show_bug.cgi?id=2541162"},{"url":"https://www.cve.org/CVERecord?id=CVE-2026-98057"},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-98057"},{"url":"https://git.kernel.org/pub/scm/linux/security/vulns.git/plain/cve/published/2026/CVE-2026-98057.mbox"}],"tags":["nvd","cve.org","csaf","vex","red-hat"],"epss":0.00168,"epssPercentile":0.06054,"cvssSource":"vendor","ingestedAt":"2026-09-25T11:06:38.844Z","slug":"CVE-2026-98057","body":"## Overview\n\nIn the Linux kernel, the following vulnerability has been resolved:\n\nring-buffer: Add checking nr_subbufs to persistent ring buffer validation\n\nSashiko reported that the code was using meta->nr_subbufs without making\nsure that it matched the nr_pages + 1 on data that was assuming the two\nwere the same.\n\nAdd a check to the persistent ring buffer validation code to make sure\nthat the saved nr_subbufs matches what we expect.\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.\n\n## Vendor advisories\n\n- **Red Hat VEX** · Moderate · affected: Red Hat Enterprise Linux 10 · no fix planned: Red Hat Enterprise Linux 10 · updated 2026-10-17 · [vex](https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-98057.json)","depth":"sunlit","depthScore":30,"depthScoreParts":{"impact":30.3,"likelihood":0,"exploitation":0,"ransomware":0},"changes":[{"seq":212390,"id":"CVE-2026-98057","ts":1790668171072,"field":"cvss","old":null,"new":"5.5"},{"seq":212389,"id":"CVE-2026-98057","ts":1790668171072,"field":"severity","old":"none","new":"medium"}]}