{"id":"CVE-2026-98057","state":"PUBLISHED","title":"ring-buffer: Add checking nr_subbufs to persistent ring buffer validation","description":"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 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.","publishedAt":"2026-09-25T10:24:03.541Z","updatedAt":"2026-10-19T09:13:03.914Z","severity":null,"assigner":"Linux","products":["Linux Linux"],"affected":[{"vendor":"Linux","product":"Linux","defaultStatus":"unaffected","versions":[{"version":"3ec743d558f111d8999aea24577ba66c65ee2eeb","status":"affected","lessThan":"f0467190e6a9fc61e343c8064ef16aad513788c3","versionType":"git"},{"version":"f5b95f1fa2ef3a03f49eeec658ba97e721412b32","status":"affected","lessThan":"364a31052aa9ef91db137f82d797366007cd85b7","versionType":"git"},{"version":"f5b95f1fa2ef3a03f49eeec658ba97e721412b32","status":"affected","lessThan":"69d502457e3f76142f7fcf6e2625e80e0ce8a60f","versionType":"git"},{"version":"f5b95f1fa2ef3a03f49eeec658ba97e721412b32","status":"affected","lessThan":"6c001a62c34f13fe1c6a24304c289b387d9e697d","versionType":"git"},{"version":"0d547a6f5e8fad26ebc12f501d7d19fccdbad6bf","status":"affected","versionType":"git"},{"version":"6.12.16","status":"affected","lessThan":"6.12.111","versionType":"semver"},{"version":"6.13.4","status":"affected","lessThan":"6.14","versionType":"semver"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["kernel/trace/ring_buffer.c"]},{"vendor":"Linux","product":"Linux","defaultStatus":"affected","versions":[{"version":"6.14","status":"affected"},{"version":"0","status":"unaffected","lessThan":"6.14","versionType":"semver"},{"version":"6.12.111","status":"unaffected","lessThanOrEqual":"6.12.*","versionType":"semver"},{"version":"6.18.57","status":"unaffected","lessThanOrEqual":"6.18.*","versionType":"semver"},{"version":"7.2.7","status":"unaffected","lessThanOrEqual":"7.2.*","versionType":"semver"},{"version":"7.3","status":"unaffected","lessThanOrEqual":"*","versionType":"original_commit_for_fix"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["kernel/trace/ring_buffer.c"]}],"references":["https://git.kernel.org/stable/c/f0467190e6a9fc61e343c8064ef16aad513788c3","https://git.kernel.org/stable/c/364a31052aa9ef91db137f82d797366007cd85b7","https://git.kernel.org/stable/c/69d502457e3f76142f7fcf6e2625e80e0ce8a60f","https://git.kernel.org/stable/c/6c001a62c34f13fe1c6a24304c289b387d9e697d"],"weaknesses":[],"ingestedAt":"2026-10-29T20:13:43.249Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2026/98xxx/CVE-2026-98057.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-98057","state":"PUBLISHED","datePublished":"2026-09-25T10:24:03.541Z","dateUpdated":"2026-10-19T09:13:03.914Z","assignerShortName":"Linux","assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","dateReserved":"2026-09-25T10:19:56.072Z"},"containers":{"cna":{"title":"ring-buffer: Add checking nr_subbufs to persistent ring buffer validation","descriptions":[{"lang":"en","value":"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 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."}],"affected":[{"vendor":"Linux","product":"Linux","defaultStatus":"unaffected","versions":[{"version":"3ec743d558f111d8999aea24577ba66c65ee2eeb","status":"affected","lessThan":"f0467190e6a9fc61e343c8064ef16aad513788c3","versionType":"git"},{"version":"f5b95f1fa2ef3a03f49eeec658ba97e721412b32","status":"affected","lessThan":"364a31052aa9ef91db137f82d797366007cd85b7","versionType":"git"},{"version":"f5b95f1fa2ef3a03f49eeec658ba97e721412b32","status":"affected","lessThan":"69d502457e3f76142f7fcf6e2625e80e0ce8a60f","versionType":"git"},{"version":"f5b95f1fa2ef3a03f49eeec658ba97e721412b32","status":"affected","lessThan":"6c001a62c34f13fe1c6a24304c289b387d9e697d","versionType":"git"},{"version":"0d547a6f5e8fad26ebc12f501d7d19fccdbad6bf","status":"affected","versionType":"git"},{"version":"6.12.16","status":"affected","lessThan":"6.12.111","versionType":"semver"},{"version":"6.13.4","status":"affected","lessThan":"6.14","versionType":"semver"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["kernel/trace/ring_buffer.c"]},{"vendor":"Linux","product":"Linux","defaultStatus":"affected","versions":[{"version":"6.14","status":"affected"},{"version":"0","status":"unaffected","lessThan":"6.14","versionType":"semver"},{"version":"6.12.111","status":"unaffected","lessThanOrEqual":"6.12.*","versionType":"semver"},{"version":"6.18.57","status":"unaffected","lessThanOrEqual":"6.18.*","versionType":"semver"},{"version":"7.2.7","status":"unaffected","lessThanOrEqual":"7.2.*","versionType":"semver"},{"version":"7.3","status":"unaffected","lessThanOrEqual":"*","versionType":"original_commit_for_fix"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["kernel/trace/ring_buffer.c"]}],"references":[{"url":"https://git.kernel.org/stable/c/f0467190e6a9fc61e343c8064ef16aad513788c3"},{"url":"https://git.kernel.org/stable/c/364a31052aa9ef91db137f82d797366007cd85b7"},{"url":"https://git.kernel.org/stable/c/69d502457e3f76142f7fcf6e2625e80e0ce8a60f"},{"url":"https://git.kernel.org/stable/c/6c001a62c34f13fe1c6a24304c289b387d9e697d"}],"providerMetadata":{"shortName":"Linux","orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","dateUpdated":"2026-10-19T09:13:03.914Z"},"cpeApplicability":[{"nodes":[{"operator":"OR","negate":false,"cpeMatch":[{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"6.12.16","versionEndExcluding":"6.12.111"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"6.14","versionEndExcluding":"6.18.57"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"6.14","versionEndExcluding":"7.2.7"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"6.14","versionEndExcluding":"7.3"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"6.13.4"}]}]}],"x_generator":{"engine":"bippy-1.2.0"}}}}}