CVE-2026-98655
CVE.org · Published
- Record status
- Published
- Identifier year (not publication year)
- 2026
- Source publication
- Source updated
- Imported by cveboard
- Source snapshot
- cve_2026-10-24_midnight_baseline ·
CNA source text (English)
perf: Require kernel access for text poke events
In the Linux kernel, the following vulnerability has been resolved: perf: Require kernel access for text poke events Perf events with exclude_kernel=1 can be opened without kernel perf access. However, exclude_kernel does not suppress text-poke sideband records. Every PERF_RECORD_TEXT_POKE is marked PERF_RECORD_MISC_KERNEL and contains a raw kernel instruction address. An unprivileged task can therefore open and mmap a task-local software event with text_poke=1. Both opening a count-only tracepoint event and configuring UDP GRO for ESP-in-UDP cause updates to inline static calls; the observer receives the relocated addresses of the modified instructions. For a known kernel image, any such address reveals the runtime kernel text base despite KASLR. Call perf_allow_kernel() whenever attr.text_poke is set, regardless of exclude_kernel. Events that neither monitor kernel execution nor request text-poke records retain their existing permissions.
Scoped product and version facts
Fix information unknown; no fixed version is derived here. Missing information does not prove that no fix exists.
Exploitation unknown; this catalogue does not assess exploitation.
Linux
- Vendor
- Linux
- Product
- Linux
- Platforms
- Unknown
- Default status
unaffected
| Version (version) | Status (status) | Version scheme (versionType) | Exclusive end (lessThan) | Inclusive end (lessThanOrEqual) | Status changes (at → status) |
|---|---|---|---|---|---|
| e17d43b93e544f5016c0251d2074c15568d5d963 | affected | git | 8c38cb055f6a9651198780e4e4d5283de4039f79 | Unavailable | None listed |
| e17d43b93e544f5016c0251d2074c15568d5d963 | affected | git | 8473f44db9f710ea6f8cafb22f2e3ba6cb8ca9a7 | Unavailable | None listed |
| e17d43b93e544f5016c0251d2074c15568d5d963 | affected | git | e506333d1b9f42f1e402acebf1283af3c44a3809 | Unavailable | None listed |
| e17d43b93e544f5016c0251d2074c15568d5d963 | affected | git | 677d0b51ac1a0db55d768c4c6399210b3de0795b | Unavailable | None listed |
| e17d43b93e544f5016c0251d2074c15568d5d963 | affected | git | 357e8a77a501d96c9517f01f4a211eed5e9c9184 | Unavailable | None listed |
Linux
- Vendor
- Linux
- Product
- Linux
- Platforms
- Unknown
- Default status
affected
| Version (version) | Status (status) | Version scheme (versionType) | Exclusive end (lessThan) | Inclusive end (lessThanOrEqual) | Status changes (at → status) |
|---|---|---|---|---|---|
| 5.9 | affected | Unavailable | Unavailable | Unavailable | None listed |
| 0 | unaffected | semver | 5.9 | Unavailable | None listed |
| 6.6.160 | unaffected | semver | Unavailable | 6.6.* | None listed |
| 6.12.113 | unaffected | semver | Unavailable | 6.12.* | None listed |
| 6.18.56 | unaffected | semver | Unavailable | 6.18.* | None listed |
| 7.2.10 | unaffected | semver | Unavailable | 7.2.* | None listed |
| 7.3 | unaffected | original_commit_for_fix | Unavailable | * | None listed |