{"api_version":"1","generated_at":"2026-11-12T03:43:39+00:00","cve":"CVE-2026-98856","urls":{"html":"https://cve.report/CVE-2026-98856","api":"https://cve.report/api/cve/CVE-2026-98856.json","docs":"https://cve.report/api","cve_org":"https://www.cve.org/CVERecord?id=CVE-2026-98856","nvd":"https://nvd.nist.gov/vuln/detail/CVE-2026-98856"},"summary":{"title":"kprobes: Skip disarmed probes when checking optkprobe overlap","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.","state":"PUBLISHED","assigner":"Linux","published_at":"2026-10-18 16:17:40","updated_at":"2026-10-30 13:21:31"},"problem_types":[],"metrics":[],"references":[{"url":"https://git.kernel.org/stable/c/ab9ed9faa67bf67383ff7e1479655e232a843c2b","name":"https://git.kernel.org/stable/c/ab9ed9faa67bf67383ff7e1479655e232a843c2b","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/3b0f604df9e2b9a456f1ae5266a439998c4c8826","name":"https://git.kernel.org/stable/c/3b0f604df9e2b9a456f1ae5266a439998c4c8826","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/526fac219e8b7d3369b43026bd0a1df51b811cd4","name":"https://git.kernel.org/stable/c/526fac219e8b7d3369b43026bd0a1df51b811cd4","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/7a39c732a22ec4a369af9e19fbe3d666ec83eec4","name":"https://git.kernel.org/stable/c/7a39c732a22ec4a369af9e19fbe3d666ec83eec4","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/3f968dcdf018861129f97910fa7bd680d939a9b0","name":"https://git.kernel.org/stable/c/3f968dcdf018861129f97910fa7bd680d939a9b0","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/6745fa65f4115045431c0c15610e876855a04625","name":"https://git.kernel.org/stable/c/6745fa65f4115045431c0c15610e876855a04625","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/e29e819cacfb4e3cd56d41eb704ab4718d6d2915","name":"https://git.kernel.org/stable/c/e29e819cacfb4e3cd56d41eb704ab4718d6d2915","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/985a568171e7bdba6dcde3420d0e5bb515813457","name":"https://git.kernel.org/stable/c/985a568171e7bdba6dcde3420d0e5bb515813457","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://www.cve.org/CVERecord?id=CVE-2026-98856","name":"CVE Program record","refsource":"CVE.ORG","tags":["canonical"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-98856","name":"NVD vulnerability detail","refsource":"NVD","tags":["canonical","analysis"]}],"affected":[{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected afd66255b9a48f5851326ddae50e2203fbf71dc9 e29e819cacfb4e3cd56d41eb704ab4718d6d2915 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected afd66255b9a48f5851326ddae50e2203fbf71dc9 ab9ed9faa67bf67383ff7e1479655e232a843c2b git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected afd66255b9a48f5851326ddae50e2203fbf71dc9 3b0f604df9e2b9a456f1ae5266a439998c4c8826 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected afd66255b9a48f5851326ddae50e2203fbf71dc9 3f968dcdf018861129f97910fa7bd680d939a9b0 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected afd66255b9a48f5851326ddae50e2203fbf71dc9 985a568171e7bdba6dcde3420d0e5bb515813457 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected afd66255b9a48f5851326ddae50e2203fbf71dc9 6745fa65f4115045431c0c15610e876855a04625 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected afd66255b9a48f5851326ddae50e2203fbf71dc9 526fac219e8b7d3369b43026bd0a1df51b811cd4 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected afd66255b9a48f5851326ddae50e2203fbf71dc9 7a39c732a22ec4a369af9e19fbe3d666ec83eec4 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 2.6.34","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 2.6.34 semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 5.10.273 5.10.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 5.15.224 5.15.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 6.1.191 6.1.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 6.6.160 6.6.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 6.12.113 6.12.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 6.18.56 6.18.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 7.2.10 7.2.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 7.3 * original_commit_for_fix","platforms":[]}],"timeline":[],"solutions":[],"workarounds":[],"exploits":[],"credits":[],"nvd_cpes":[],"vendor_comments":[],"enrichments":{"kev":null,"epss":{"cve_year":"2026","cve_id":"98856","cve":"CVE-2026-98856","epss":"0.001770000","percentile":"0.073200000","score_date":"2026-11-01","updated_at":"2026-11-02 00:05:55"},"legacy_qids":[]},"source_records":{"cve_program":{"containers":{"cna":{"affected":[{"defaultStatus":"unaffected","product":"Linux","programFiles":["kernel/kprobes.c"],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","vendor":"Linux","versions":[{"lessThan":"e29e819cacfb4e3cd56d41eb704ab4718d6d2915","status":"affected","version":"afd66255b9a48f5851326ddae50e2203fbf71dc9","versionType":"git"},{"lessThan":"ab9ed9faa67bf67383ff7e1479655e232a843c2b","status":"affected","version":"afd66255b9a48f5851326ddae50e2203fbf71dc9","versionType":"git"},{"lessThan":"3b0f604df9e2b9a456f1ae5266a439998c4c8826","status":"affected","version":"afd66255b9a48f5851326ddae50e2203fbf71dc9","versionType":"git"},{"lessThan":"3f968dcdf018861129f97910fa7bd680d939a9b0","status":"affected","version":"afd66255b9a48f5851326ddae50e2203fbf71dc9","versionType":"git"},{"lessThan":"985a568171e7bdba6dcde3420d0e5bb515813457","status":"affected","version":"afd66255b9a48f5851326ddae50e2203fbf71dc9","versionType":"git"},{"lessThan":"6745fa65f4115045431c0c15610e876855a04625","status":"affected","version":"afd66255b9a48f5851326ddae50e2203fbf71dc9","versionType":"git"},{"lessThan":"526fac219e8b7d3369b43026bd0a1df51b811cd4","status":"affected","version":"afd66255b9a48f5851326ddae50e2203fbf71dc9","versionType":"git"},{"lessThan":"7a39c732a22ec4a369af9e19fbe3d666ec83eec4","status":"affected","version":"afd66255b9a48f5851326ddae50e2203fbf71dc9","versionType":"git"}]},{"defaultStatus":"affected","product":"Linux","programFiles":["kernel/kprobes.c"],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","vendor":"Linux","versions":[{"status":"affected","version":"2.6.34"},{"lessThan":"2.6.34","status":"unaffected","version":"0","versionType":"semver"},{"lessThanOrEqual":"5.10.*","status":"unaffected","version":"5.10.273","versionType":"semver"},{"lessThanOrEqual":"5.15.*","status":"unaffected","version":"5.15.224","versionType":"semver"},{"lessThanOrEqual":"6.1.*","status":"unaffected","version":"6.1.191","versionType":"semver"},{"lessThanOrEqual":"6.6.*","status":"unaffected","version":"6.6.160","versionType":"semver"},{"lessThanOrEqual":"6.12.*","status":"unaffected","version":"6.12.113","versionType":"semver"},{"lessThanOrEqual":"6.18.*","status":"unaffected","version":"6.18.56","versionType":"semver"},{"lessThanOrEqual":"7.2.*","status":"unaffected","version":"7.2.10","versionType":"semver"},{"lessThanOrEqual":"*","status":"unaffected","version":"7.3","versionType":"original_commit_for_fix"}]}],"cpeApplicability":[{"nodes":[{"cpeMatch":[{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"5.10.273","versionStartIncluding":"2.6.34","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"5.15.224","versionStartIncluding":"2.6.34","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"6.1.191","versionStartIncluding":"2.6.34","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"6.6.160","versionStartIncluding":"2.6.34","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"6.12.113","versionStartIncluding":"2.6.34","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"6.18.56","versionStartIncluding":"2.6.34","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"7.2.10","versionStartIncluding":"2.6.34","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"7.3","versionStartIncluding":"2.6.34","vulnerable":true}],"negate":false,"operator":"OR"}]}],"descriptions":[{"lang":"en","value":"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."}],"providerMetadata":{"dateUpdated":"2026-10-30T12:40:17.396Z","orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","shortName":"Linux"},"references":[{"url":"https://git.kernel.org/stable/c/e29e819cacfb4e3cd56d41eb704ab4718d6d2915"},{"url":"https://git.kernel.org/stable/c/ab9ed9faa67bf67383ff7e1479655e232a843c2b"},{"url":"https://git.kernel.org/stable/c/3b0f604df9e2b9a456f1ae5266a439998c4c8826"},{"url":"https://git.kernel.org/stable/c/3f968dcdf018861129f97910fa7bd680d939a9b0"},{"url":"https://git.kernel.org/stable/c/985a568171e7bdba6dcde3420d0e5bb515813457"},{"url":"https://git.kernel.org/stable/c/6745fa65f4115045431c0c15610e876855a04625"},{"url":"https://git.kernel.org/stable/c/526fac219e8b7d3369b43026bd0a1df51b811cd4"},{"url":"https://git.kernel.org/stable/c/7a39c732a22ec4a369af9e19fbe3d666ec83eec4"}],"title":"kprobes: Skip disarmed probes when checking optkprobe overlap","x_generator":{"engine":"bippy-1.2.0"}}},"cveMetadata":{"assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","assignerShortName":"Linux","cveId":"CVE-2026-98856","datePublished":"2026-10-18T15:51:12.359Z","dateReserved":"2026-09-25T10:25:14.376Z","dateUpdated":"2026-10-30T12:40:17.396Z","state":"PUBLISHED"},"dataType":"CVE_RECORD","dataVersion":"5.2"},"nvd":{"publishedDate":"2026-10-18 16:17:40","lastModifiedDate":"2026-10-30 13:21:31","problem_types":[],"metrics":[],"configurations":[]},"legacy_mitre":{"record":{"CveYear":"2026","CveId":"98856","Ordinal":"1","Title":"kprobes: Skip disarmed probes when checking optkprobe overlap","CVE":"CVE-2026-98856","Year":"2026"},"notes":[{"CveYear":"2026","CveId":"98856","Ordinal":"1","NoteData":"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.","Type":"Description","Title":"kprobes: Skip disarmed probes when checking optkprobe overlap"}]}}}