CVE-2026-97587
CVE CVE-2026-97587EUVD EUVD-2026-86895Published 2026-09-25T10:22:06.000Z
What the advisory describes
In the Linux kernel, the following vulnerability has been resolved: perf: RISC-V: store available counter mask as bitmap The available-counter mask was a single unsigned long, but iteration uses RISCV_MAX_COUNTERS, which is 64. On RV32 that reads past the object. Filling with an unsigned-long bit at index 32 and above is also wrong. Use DECLARE_BITMAP and set_bit/bitmap helpers. Walk each bitmap word into CFG_MATCH when checking events, when allocating an index, and when stopping all counters. Set the counter base to i times BITS_PER_LONG. Share the CFG_MATCH ecall through a small helper so the 32-bit argument split is not duplicated. On qemu-system-riscv32 the probe bitmap has bits above XLEN set, so the first word alone is not enough. [pjw@kernel.org: updated to apply; fixed checkpatch.pl issues]
Source: EUVD (ENISA), in the words of the advisory.
Products the advisory names
These come from the advisory itself, not from any check we performed.
- Linux — Linux patch: 6.18.53; patch: 7.2.7; patch: 7.3-rc3; patch: 6.12.111; e9991434596f5373dfd75857b445eb92a9253c56 <143668c424772979a45118dc9cc9c2c13a35f41d; e9991434596f5373dfd75857b445eb92a9253c56 <9bec7beaed074bcae4181fde9ff9dfbe4e7b0957; e9991434596f5373dfd75857b445eb92a9253c56 <e5481db31f4654e9a1254d5d467d9b1ff2f8b1cb; 5.18; e9991434596f5373dfd75857b445eb92a9253c56 <6809da6e9c08ccc9a09cb0a48c61471679274aaa; patch: 0
The versions shown are the advisory's own. Patchlage compares no version numbers and derives no judgement from them — which version is installed is something a person has to look up.
Carried in the product catalogue
An estate covering these products can be recorded in Patchlage. An advisory about them appears in the next morning's situation report.
- Linux — Linux
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