AZL-108723
See a problem?- Import Source
- https://github.com/microsoft/AzureLinuxVulnerabilityData/blob/main/osv/AZL-108723.json
- JSON Data
- https://api.osv.dev/v1/vulns/AZL-108723
- Upstream
- Published
- 2026-10-18T16:17:40Z
- Modified
- 2026-10-19T14:16:49Z
- Summary
- CVE-2026-98856 affecting package kernel 6.6.157.1-1
- Details
-
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+4A'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.
- References