Answer in brief
CVE-2026-98655 records a Unknown severity vulnerability in perf: Require kernel access for text poke events. 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 | >=e17d43b93e544f5016c0251d2074c15568d5d963 <8473f44db9f710ea6f8cafb22f2e3ba6cb8ca9a7 || >=e17d43b93e544f5016c0251d2074c15568d5d963 <e506333d1b9f42f1e402acebf1283af3c44a3809 || >=e17d43b93e544f5016c0251d2074c15568d5d963 <677d0b51ac1a0db55d768c4c6399210b3de0795b || >=e17d43b93e544f5016c0251d2074c15568d5d963 <357e8a77a501d96c9517f01f4a211eed5e9c9184 | 8473f44db9f710ea6f8cafb22f2e3ba6cb8ca9a7, e506333d1b9f42f1e402acebf1283af3c44a3809, 677d0b51ac1a0db55d768c4c6399210b3de0795b, 357e8a77a501d96c9517f01f4a211eed5e9c9184 |
| Linux/Linuxgeneric | 5.9 | Not reported |
| Linux/Linuxgeneric | >=e17d43b93e544f5016c0251d2074c15568d5d963 <8c38cb055f6a9651198780e4e4d5283de4039f79 || >=e17d43b93e544f5016c0251d2074c15568d5d963 <8473f44db9f710ea6f8cafb22f2e3ba6cb8ca9a7 || >=e17d43b93e544f5016c0251d2074c15568d5d963 <e506333d1b9f42f1e402acebf1283af3c44a3809 || >=e17d43b93e544f5016c0251d2074c15568d5d963 <677d0b51ac1a0db55d768c4c6399210b3de0795b || >=e17d43b93e544f5016c0251d2074c15568d5d963 <357e8a77a501d96c9517f01f4a211eed5e9c9184 | 8c38cb055f6a9651198780e4e4d5283de4039f79, 8473f44db9f710ea6f8cafb22f2e3ba6cb8ca9a7, e506333d1b9f42f1e402acebf1283af3c44a3809, 677d0b51ac1a0db55d768c4c6399210b3de0795b, 357e8a77a501d96c9517f01f4a211eed5e9c9184 |
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: 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.
Quoted source text, attributed separately from HOL analysis.