Answer in brief
CVE-2026-98856 records a Unknown severity vulnerability in kprobes: Skip disarmed probes when checking optkprobe overlap. The current sources do not mark it as known exploited. The current feed maps Linux/Linux (generic), Linux/Linux (generic), Linux/Linux (generic). Check affected ranges and fixed versions before updating.
Analysis pending evidence review
HOL Guard separates source facts from reviewed analysis. See the methodology.
A CVSS score is not reported in the current record. The current sources do not mark it as known exploited. Treat this as a source-backed prioritization signal, not a statement about your environment.
Analysis status
Analysis pending evidence review
Factual feed record only; HOL analysis is not approved for indexing. Read the methodology.
The current feed maps Linux/Linux (generic), Linux/Linux (generic), Linux/Linux (generic). Check affected ranges and fixed versions before updating.
| Package | Affected range | Fixed version |
|---|---|---|
| Linux/Linuxgeneric | >=afd66255b9a48f5851326ddae50e2203fbf71dc9 <985a568171e7bdba6dcde3420d0e5bb515813457 || >=afd66255b9a48f5851326ddae50e2203fbf71dc9 <6745fa65f4115045431c0c15610e876855a04625 || >=afd66255b9a48f5851326ddae50e2203fbf71dc9 <526fac219e8b7d3369b43026bd0a1df51b811cd4 || >=afd66255b9a48f5851326ddae50e2203fbf71dc9 <7a39c732a22ec4a369af9e19fbe3d666ec83eec4 | 985a568171e7bdba6dcde3420d0e5bb515813457, 6745fa65f4115045431c0c15610e876855a04625, 526fac219e8b7d3369b43026bd0a1df51b811cd4, 7a39c732a22ec4a369af9e19fbe3d666ec83eec4 |
| Linux/Linuxgeneric | 2.6.34 | Not reported |
| Linux/Linuxgeneric | >=afd66255b9a48f5851326ddae50e2203fbf71dc9 <3f968dcdf018861129f97910fa7bd680d939a9b0 || >=afd66255b9a48f5851326ddae50e2203fbf71dc9 <985a568171e7bdba6dcde3420d0e5bb515813457 || >=afd66255b9a48f5851326ddae50e2203fbf71dc9 <6745fa65f4115045431c0c15610e876855a04625 || >=afd66255b9a48f5851326ddae50e2203fbf71dc9 <526fac219e8b7d3369b43026bd0a1df51b811cd4 || >=afd66255b9a48f5851326ddae50e2203fbf71dc9 <7a39c732a22ec4a369af9e19fbe3d666ec83eec4 | 3f968dcdf018861129f97910fa7bd680d939a9b0, 985a568171e7bdba6dcde3420d0e5bb515813457, 6745fa65f4115045431c0c15610e876855a04625, 526fac219e8b7d3369b43026bd0a1df51b811cd4, 7a39c732a22ec4a369af9e19fbe3d666ec83eec4 |
Published upstream
Oct 18, 2026
Evidence: source:cvelist:source_dates:source-dates:recordSource modified
Oct 21, 2026
Evidence: source:cvelist:source_dates:source-dates:recordFirst seen by HOL
Oct 18, 2026
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.
Quoted source text, attributed separately from HOL analysis.