{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-98856", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2026-09-25T10:25:14.376Z", "datePublished": "2026-10-18T15:51:12.359Z", "dateUpdated": "2026-10-21T12:57:35.270Z"}, "containers": {"cna": {"providerMetadata": {"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-10-21T12:57:35.270Z"}, "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."}], "affected": [{"product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["kernel/kprobes.c"], "versions": [{"version": "afd66255b9a48f5851326ddae50e2203fbf71dc9", "lessThan": "3f968dcdf018861129f97910fa7bd680d939a9b0", "status": "affected", "versionType": "git"}, {"version": "afd66255b9a48f5851326ddae50e2203fbf71dc9", "lessThan": "985a568171e7bdba6dcde3420d0e5bb515813457", "status": "affected", "versionType": "git"}, {"version": "afd66255b9a48f5851326ddae50e2203fbf71dc9", "lessThan": "6745fa65f4115045431c0c15610e876855a04625", "status": "affected", "versionType": "git"}, {"version": "afd66255b9a48f5851326ddae50e2203fbf71dc9", "lessThan": "526fac219e8b7d3369b43026bd0a1df51b811cd4", "status": "affected", "versionType": "git"}, {"version": "afd66255b9a48f5851326ddae50e2203fbf71dc9", "lessThan": "7a39c732a22ec4a369af9e19fbe3d666ec83eec4", "status": "affected", "versionType": "git"}]}, {"product": "Linux", "vendor": "Linux", "defaultStatus": "affected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["kernel/kprobes.c"], "versions": [{"version": "2.6.34", "status": "affected"}, {"version": "0", "lessThan": "2.6.34", "status": "unaffected", "versionType": "semver"}, {"version": "6.6.160", "lessThanOrEqual": "6.6.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.12.113", "lessThanOrEqual": "6.12.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.18.56", "lessThanOrEqual": "6.18.*", "status": "unaffected", "versionType": "semver"}, {"version": "7.2.10", "lessThanOrEqual": "7.2.*", "status": "unaffected", "versionType": "semver"}, {"version": "7.3", "lessThanOrEqual": "*", "status": "unaffected", "versionType": "original_commit_for_fix"}]}], "cpeApplicability": [{"nodes": [{"operator": "OR", "negate": false, "cpeMatch": [{"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"}]}]}], "references": [{"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"}}}}

{}

{"affected": [{"affectedData": [{"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": "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": "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"}]}], "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}], "cveTags": [], "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."}], "id": "CVE-2026-98856", "lastModified": "2026-10-21T13:21:50.127", "metrics": {}, "published": "2026-10-18T16:17:40.050", "references": [{"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/3f968dcdf018861129f97910fa7bd680d939a9b0"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/526fac219e8b7d3369b43026bd0a1df51b811cd4"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/6745fa65f4115045431c0c15610e876855a04625"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/7a39c732a22ec4a369af9e19fbe3d666ec83eec4"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/985a568171e7bdba6dcde3420d0e5bb515813457"}], "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "vulnStatus": "Received"}

{}