CVE-2026-98655None▾ SunlitIn 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 …
▾ Sunlit zone — Low / medium · no exploitation signal
impact 2.8 · likelihood 0 · exploitation 0
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Exploit-prediction probability, daily snapshots since Oct 20.
Disclosure to exploitation, from the record and what we observed since indexing it.
Disclosed via CVEORG
0.2%
Last analysed / modified upstream
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.
Linux >= e17d43b93e544f5016c0251d2074c15568d5d963 < 8c38cb055f6a9651198780e4e4d5283de4039f79Linux >= e17d43b93e544f5016c0251d2074c15568d5d963 < 8473f44db9f710ea6f8cafb22f2e3ba6cb8ca9a7Linux >= e17d43b93e544f5016c0251d2074c15568d5d963 < e506333d1b9f42f1e402acebf1283af3c44a3809Linux >= e17d43b93e544f5016c0251d2074c15568d5d963 < 677d0b51ac1a0db55d768c4c6399210b3de0795bLinux >= e17d43b93e544f5016c0251d2074c15568d5d963 < 357e8a77a501d96c9517f01f4a211eed5e9c9184Linux 5.9Refer to the linked advisories for vendor-supplied fixes and affected version ranges.
Connected by shared product, vendor, weakness, or advisory.
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