{"id":"CVE-2026-98655","aliases":[],"cve":{"records":[{"id":"CVE-2026-98655","source":"Linux","state":"PUBLISHED","reasons":[],"replacements":[],"disputed":false,"unsupportedWhenAssigned":false,"reserved":"2026-09-25T10:25:14.362Z","published":"2026-10-18T15:44:05.722Z","modified":"2026-10-30T12:38:27.085Z"}],"publishers":[{"name":"Linux","role":"CNA","organizationId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","modified":"2026-10-30T12:38:27.085Z"}],"references":[{"url":"https://git.kernel.org/stable/c/4d8fc6290d14aa9e4c3b620fe3e5dc8ba3bea7e3","tags":[],"source":"Linux"},{"url":"https://git.kernel.org/stable/c/c30886396eb1c0e9fdc4296398dea0db0ab37610","tags":[],"source":"Linux"},{"url":"https://git.kernel.org/stable/c/0e26d44b7c64b045adebcf5d614140f811f09752","tags":[],"source":"Linux"},{"url":"https://git.kernel.org/stable/c/8c38cb055f6a9651198780e4e4d5283de4039f79","tags":[],"source":"Linux"},{"url":"https://git.kernel.org/stable/c/8473f44db9f710ea6f8cafb22f2e3ba6cb8ca9a7","tags":[],"source":"Linux"},{"url":"https://git.kernel.org/stable/c/e506333d1b9f42f1e402acebf1283af3c44a3809","tags":[],"source":"Linux"},{"url":"https://git.kernel.org/stable/c/677d0b51ac1a0db55d768c4c6399210b3de0795b","tags":[],"source":"Linux"},{"url":"https://git.kernel.org/stable/c/357e8a77a501d96c9517f01f4a211eed5e9c9184","tags":[],"source":"Linux"}],"weaknesses":[],"applicability":[{"source":"Linux","statements":[{"nodes":[{"operator":"OR","negate":false,"cpeMatch":[{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.9","versionEndExcluding":"5.10.273"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.9","versionEndExcluding":"5.15.224"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.9","versionEndExcluding":"6.1.191"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.9","versionEndExcluding":"6.6.160"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.9","versionEndExcluding":"6.12.113"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.9","versionEndExcluding":"6.18.56"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.9","versionEndExcluding":"7.2.10"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.9","versionEndExcluding":"7.3"}]}]}]}],"prioritization":[]},"title":"perf: Require kernel access for text poke events","titleSource":"Linux","descriptionSource":"Linux","description":"In the Linux kernel, the following vulnerability has been resolved:\n\nperf: Require kernel access for text poke events\n\nPerf events with exclude_kernel=1 can be opened without kernel perf\naccess. However, exclude_kernel does not suppress text-poke sideband\nrecords. Every PERF_RECORD_TEXT_POKE is marked PERF_RECORD_MISC_KERNEL\nand contains a raw kernel instruction address.\n\nAn unprivileged task can therefore open and mmap a task-local software\nevent with text_poke=1. Both opening a count-only tracepoint event and\nconfiguring UDP GRO for ESP-in-UDP cause updates to inline static calls;\nthe observer receives the relocated addresses of the modified instructions.\nFor a known kernel image, any such address reveals the runtime kernel\ntext base despite KASLR.\n\nCall perf_allow_kernel() whenever attr.text_poke is set, regardless of\nexclude_kernel. Events that neither monitor kernel execution nor request\ntext-poke records retain their existing permissions.","score":null,"severity":"unknown","published":"2026-10-18T15:44:05.722Z","modified":"2026-10-30T12:38:27.085Z","withdrawn":false,"knownExploited":false,"affected":[],"products":[{"vendor":"Linux","name":"Linux","platforms":[],"versions":[{"version":"e17d43b93e544f5016c0251d2074c15568d5d963","status":"affected","lessThan":"4d8fc6290d14aa9e4c3b620fe3e5dc8ba3bea7e3","versionType":"git"},{"version":"e17d43b93e544f5016c0251d2074c15568d5d963","status":"affected","lessThan":"c30886396eb1c0e9fdc4296398dea0db0ab37610","versionType":"git"},{"version":"e17d43b93e544f5016c0251d2074c15568d5d963","status":"affected","lessThan":"0e26d44b7c64b045adebcf5d614140f811f09752","versionType":"git"},{"version":"e17d43b93e544f5016c0251d2074c15568d5d963","status":"affected","lessThan":"8c38cb055f6a9651198780e4e4d5283de4039f79","versionType":"git"},{"version":"e17d43b93e544f5016c0251d2074c15568d5d963","status":"affected","lessThan":"8473f44db9f710ea6f8cafb22f2e3ba6cb8ca9a7","versionType":"git"},{"version":"e17d43b93e544f5016c0251d2074c15568d5d963","status":"affected","lessThan":"e506333d1b9f42f1e402acebf1283af3c44a3809","versionType":"git"},{"version":"e17d43b93e544f5016c0251d2074c15568d5d963","status":"affected","lessThan":"677d0b51ac1a0db55d768c4c6399210b3de0795b","versionType":"git"},{"version":"e17d43b93e544f5016c0251d2074c15568d5d963","status":"affected","lessThan":"357e8a77a501d96c9517f01f4a211eed5e9c9184","versionType":"git"}],"defaultStatus":"unaffected","cpes":[],"source":"Linux","url":"https://www.cve.org/CVERecord?id=CVE-2026-98655"},{"vendor":"Linux","name":"Linux","platforms":[],"versions":[{"version":"5.9","status":"affected"},{"version":"0","status":"unaffected","lessThan":"5.9","versionType":"semver"},{"version":"5.10.273","status":"unaffected","lessThanOrEqual":"5.10.*","versionType":"semver"},{"version":"5.15.224","status":"unaffected","lessThanOrEqual":"5.15.*","versionType":"semver"},{"version":"6.1.191","status":"unaffected","lessThanOrEqual":"6.1.*","versionType":"semver"},{"version":"6.6.160","status":"unaffected","lessThanOrEqual":"6.6.*","versionType":"semver"},{"version":"6.12.113","status":"unaffected","lessThanOrEqual":"6.12.*","versionType":"semver"},{"version":"6.18.56","status":"unaffected","lessThanOrEqual":"6.18.*","versionType":"semver"},{"version":"7.2.10","status":"unaffected","lessThanOrEqual":"7.2.*","versionType":"semver"},{"version":"7.3","status":"unaffected","lessThanOrEqual":"*","versionType":"original_commit_for_fix"}],"defaultStatus":"affected","cpes":[],"source":"Linux","url":"https://www.cve.org/CVERecord?id=CVE-2026-98655"}],"remediation":[],"references":["https://git.kernel.org/stable/c/4d8fc6290d14aa9e4c3b620fe3e5dc8ba3bea7e3","https://git.kernel.org/stable/c/c30886396eb1c0e9fdc4296398dea0db0ab37610","https://git.kernel.org/stable/c/0e26d44b7c64b045adebcf5d614140f811f09752","https://git.kernel.org/stable/c/8c38cb055f6a9651198780e4e4d5283de4039f79","https://git.kernel.org/stable/c/8473f44db9f710ea6f8cafb22f2e3ba6cb8ca9a7","https://git.kernel.org/stable/c/e506333d1b9f42f1e402acebf1283af3c44a3809","https://git.kernel.org/stable/c/677d0b51ac1a0db55d768c4c6399210b3de0795b","https://git.kernel.org/stable/c/357e8a77a501d96c9517f01f4a211eed5e9c9184"],"sources":[{"name":"CVE","id":"CVE-2026-98655","modified":"2026-10-30T12:38:27.085Z","url":"https://www.cve.org/CVERecord?id=CVE-2026-98655"}],"assessments":[],"sourceAffected":[],"observedAt":"2026-10-30T14:01:51.861Z","kev":{"status":"not-listed","checkedAt":"2026-11-15T00:10:33.488Z"},"coverage":[{"source":"NVD","status":"not-checked"},{"source":"GHSA","status":"not-checked"},{"source":"EUVD","status":"not-checked"},{"source":"EPSS","status":"not-checked"}],"evidence":[],"aiSummary":null}