kprobes: Skip disarmed probes when checking optkprobe overlap
In the Linux kernel, the following vulnerability has been resolved: kprobes: Skip disarmed probes when checking optkprobe overlap On x86, an optkprobe at A replaces five bytes with a jump. If a disabled probe B is at A+2, get_optimized_kprobe() stops at B when arming a new probe C at A+4. It leaves A optimized: A A+1 A+2 A+3 A+4 A's jump | e9 | d0 | d1 | d2 | d3 | after C | e9 | d0 | d1 | d2 | cc | The INT3 for C overwrites the last byte of A's jump displacement, so execution can jump to the wrong address. B can have prepared optinsns while disarmed, but has no jump to unoptimize. Continue past disarmed and unprepared probes to find the active optimized probe before arming a probe in its jump.
CVE-2026-98856
Primary source · Revision 1
Imported from structured advisory data. Source references identify upstream records or fields; verify affected versions and your deployed configuration.
Security context
Source reference: cve:CVE-2026-98856
Linux
Source reference: /containers/cna/affected/0/product
- Affected versions
- Not stated in this record
- Fixed versions
- Not stated in this record
- Prerequisites
- Not stated in this record
Linux
Source reference: /containers/cna/affected/1/product
- Affected versions
- Not stated in this record
- Fixed versions
- Not stated in this record
- Prerequisites
- Not stated in this record
Structured affected-version data
Original package identities and version rules from this source.
[
{
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"product": "Linux",
"versions": [
{
"status": "affected",
"version": "afd66255b9a48f5851326ddae50e2203fbf71dc9",
"lessThan": "3f968dcdf018861129f97910fa7bd680d939a9b0",
"versionType": "git"
},
{
"status": "affected",
"version": "afd66255b9a48f5851326ddae50e2203fbf71dc9",
"lessThan": "985a568171e7bdba6dcde3420d0e5bb515813457",
"versionType": "git"
},
{
"status": "affected",
"version": "afd66255b9a48f5851326ddae50e2203fbf71dc9",
"lessThan": "6745fa65f4115045431c0c15610e876855a04625",
"versionType": "git"
},
{
"status": "affected",
"version": "afd66255b9a48f5851326ddae50e2203fbf71dc9",
"lessThan": "526fac219e8b7d3369b43026bd0a1df51b811cd4",
"versionType": "git"
},
{
"status": "affected",
"version": "afd66255b9a48f5851326ddae50e2203fbf71dc9",
"lessThan": "7a39c732a22ec4a369af9e19fbe3d666ec83eec4",
"versionType": "git"
}
],
"programFiles": [
"kernel/kprobes.c"
],
"defaultStatus": "unaffected"
},
{
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"product": "Linux",
"versions": [
{
"status": "affected",
"version": "2.6.34"
},
{
"status": "unaffected",
"version": "0",
"lessThan": "2.6.34",
"versionType": "semver"
},
{
"status": "unaffected",
"version": "6.6.160",
"versionType": "semver",
"lessThanOrEqual": "6.6.*"
},
{
"status": "unaffected",
"version": "6.12.113",
"versionType": "semver",
"lessThanOrEqual": "6.12.*"
},
{
"status": "unaffected",
"version": "6.18.56",
"versionType": "semver",
"lessThanOrEqual": "6.18.*"
},
{
"status": "unaffected",
"version": "7.2.10",
"versionType": "semver",
"lessThanOrEqual": "7.2.*"
},
{
"status": "unaffected",
"version": "7.3",
"versionType": "original_commit_for_fix",
"lessThanOrEqual": "*"
}
],
"programFiles": [
"kernel/kprobes.c"
],
"defaultStatus": "affected"
}
]- Related CVEs
- CVE-2026-98856
Source reference:
/cveMetadata/cveId
Publisher severity
No explicit severity was provided.
- Event
- #49010 · Revision 1
- Added to Heist Feed
- Publisher date