{"id":"CVE-2026-98856","aliases":[],"cve":{"records":[{"id":"CVE-2026-98856","source":"Linux","state":"PUBLISHED","reasons":[],"replacements":[],"disputed":false,"unsupportedWhenAssigned":false,"reserved":"2026-09-25T10:25:14.376Z","published":"2026-10-18T15:51:12.359Z","modified":"2026-10-30T12:40:17.396Z"}],"publishers":[{"name":"Linux","role":"CNA","organizationId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","modified":"2026-10-30T12:40:17.396Z"}],"references":[{"url":"https://git.kernel.org/stable/c/e29e819cacfb4e3cd56d41eb704ab4718d6d2915","tags":[],"source":"Linux"},{"url":"https://git.kernel.org/stable/c/ab9ed9faa67bf67383ff7e1479655e232a843c2b","tags":[],"source":"Linux"},{"url":"https://git.kernel.org/stable/c/3b0f604df9e2b9a456f1ae5266a439998c4c8826","tags":[],"source":"Linux"},{"url":"https://git.kernel.org/stable/c/3f968dcdf018861129f97910fa7bd680d939a9b0","tags":[],"source":"Linux"},{"url":"https://git.kernel.org/stable/c/985a568171e7bdba6dcde3420d0e5bb515813457","tags":[],"source":"Linux"},{"url":"https://git.kernel.org/stable/c/6745fa65f4115045431c0c15610e876855a04625","tags":[],"source":"Linux"},{"url":"https://git.kernel.org/stable/c/526fac219e8b7d3369b43026bd0a1df51b811cd4","tags":[],"source":"Linux"},{"url":"https://git.kernel.org/stable/c/7a39c732a22ec4a369af9e19fbe3d666ec83eec4","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":"2.6.34","versionEndExcluding":"5.10.273"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"2.6.34","versionEndExcluding":"5.15.224"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"2.6.34","versionEndExcluding":"6.1.191"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"2.6.34","versionEndExcluding":"6.6.160"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"2.6.34","versionEndExcluding":"6.12.113"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"2.6.34","versionEndExcluding":"6.18.56"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"2.6.34","versionEndExcluding":"7.2.10"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"2.6.34","versionEndExcluding":"7.3"}]}]}]}],"prioritization":[]},"title":"kprobes: Skip disarmed probes when checking optkprobe overlap","titleSource":"Linux","descriptionSource":"Linux","description":"In the Linux kernel, the following vulnerability has been resolved:\n\nkprobes: Skip disarmed probes when checking optkprobe overlap\n\nOn x86, an optkprobe at A replaces five bytes with a jump. If a disabled\nprobe B is at A+2, get_optimized_kprobe() stops at B when arming a new\nprobe C at A+4. It leaves A optimized:\n\n              A    A+1  A+2  A+3  A+4\n  A's jump  | e9 | d0 | d1 | d2 | d3 |\n  after C   | e9 | d0 | d1 | d2 | cc |\n\nThe INT3 for C overwrites the last byte of A's jump displacement, so\nexecution can jump to the wrong address. B can have prepared optinsns\nwhile disarmed, but has no jump to unoptimize.\n\nContinue past disarmed and unprepared probes to find the active optimized\nprobe before arming a probe in its jump.","score":null,"severity":"unknown","published":"2026-10-18T15:51:12.359Z","modified":"2026-10-30T12:40:17.396Z","withdrawn":false,"knownExploited":false,"affected":[],"products":[{"vendor":"Linux","name":"Linux","platforms":[],"versions":[{"version":"afd66255b9a48f5851326ddae50e2203fbf71dc9","status":"affected","lessThan":"e29e819cacfb4e3cd56d41eb704ab4718d6d2915","versionType":"git"},{"version":"afd66255b9a48f5851326ddae50e2203fbf71dc9","status":"affected","lessThan":"ab9ed9faa67bf67383ff7e1479655e232a843c2b","versionType":"git"},{"version":"afd66255b9a48f5851326ddae50e2203fbf71dc9","status":"affected","lessThan":"3b0f604df9e2b9a456f1ae5266a439998c4c8826","versionType":"git"},{"version":"afd66255b9a48f5851326ddae50e2203fbf71dc9","status":"affected","lessThan":"3f968dcdf018861129f97910fa7bd680d939a9b0","versionType":"git"},{"version":"afd66255b9a48f5851326ddae50e2203fbf71dc9","status":"affected","lessThan":"985a568171e7bdba6dcde3420d0e5bb515813457","versionType":"git"},{"version":"afd66255b9a48f5851326ddae50e2203fbf71dc9","status":"affected","lessThan":"6745fa65f4115045431c0c15610e876855a04625","versionType":"git"},{"version":"afd66255b9a48f5851326ddae50e2203fbf71dc9","status":"affected","lessThan":"526fac219e8b7d3369b43026bd0a1df51b811cd4","versionType":"git"},{"version":"afd66255b9a48f5851326ddae50e2203fbf71dc9","status":"affected","lessThan":"7a39c732a22ec4a369af9e19fbe3d666ec83eec4","versionType":"git"}],"defaultStatus":"unaffected","cpes":[],"source":"Linux","url":"https://www.cve.org/CVERecord?id=CVE-2026-98856"},{"vendor":"Linux","name":"Linux","platforms":[],"versions":[{"version":"2.6.34","status":"affected"},{"version":"0","status":"unaffected","lessThan":"2.6.34","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-2026-98856"}],"remediation":[],"references":["https://git.kernel.org/stable/c/e29e819cacfb4e3cd56d41eb704ab4718d6d2915","https://git.kernel.org/stable/c/ab9ed9faa67bf67383ff7e1479655e232a843c2b","https://git.kernel.org/stable/c/3b0f604df9e2b9a456f1ae5266a439998c4c8826","https://git.kernel.org/stable/c/3f968dcdf018861129f97910fa7bd680d939a9b0","https://git.kernel.org/stable/c/985a568171e7bdba6dcde3420d0e5bb515813457","https://git.kernel.org/stable/c/6745fa65f4115045431c0c15610e876855a04625","https://git.kernel.org/stable/c/526fac219e8b7d3369b43026bd0a1df51b811cd4","https://git.kernel.org/stable/c/7a39c732a22ec4a369af9e19fbe3d666ec83eec4"],"sources":[{"name":"CVE","id":"CVE-2026-98856","modified":"2026-10-30T12:40:17.396Z","url":"https://www.cve.org/CVERecord?id=CVE-2026-98856"}],"assessments":[],"sourceAffected":[],"observedAt":"2026-10-30T13:09:55.710Z","kev":{"status":"not-listed","checkedAt":"2026-11-15T02:35:33.315Z"},"coverage":[{"source":"NVD","status":"not-checked"},{"source":"GHSA","status":"not-checked"},{"source":"EUVD","status":"not-checked"},{"source":"EPSS","status":"not-checked"}],"evidence":[],"aiSummary":null}