CVE-2026-98611bpf: Check params size before reading reserved fields
Updated under an hour ago ()
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No exploitation reported and no EPSS estimate yet.
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In the Linux kernel, the following vulnerability has been resolved: bpf: Check params size before reading reserved fields bpf_crypto_ctx_create() is a kfunc whose second argument is declared with the __sz annotation, so the verifier only guarantees that params__sz bytes of params are valid. The function nevertheless reads params->reserved[0] and params->reserved[1] (offsets 14 and 15) before comparing params__sz against the size of struct bpf_crypto_params, so a BPF program can pass a shorter buffer and have the kernel read past the region that was validated for it. Move the size check in front of the reserved field reads.
- CVSS
- Not yet scored
- Weakness (CWE)
- Not given
- Known exploited
- Not in CISA's KEV catalog
- EPSS (exploitation in the next 30 days)
- Not loaded for this CVE
- Assigned by
- Linux
- NVD analysis
- Received
- Record last updated
- Oct 18, 2026
- First seen by InfoSec Signals
- Oct 18, 2026
Affected products
Linux Linux linux:linux (from the name) | from 3e1c6f35409f9e447bf37f64840f5b65576bfb78 before e03253f5d65ebcd2a6d479f140c3bd9c7e4fb84a; from 3e1c6f35409f9e447bf37f64840f5b65576bfb78 before cd12d3e08620257fbcaa262785d7f4b9473afc7a; from 3e1c6f35409f9e447bf37f64840f5b65576bfb78 before 86a0e945fb645ea90233fde239cd2de79f01974c; from 3e1c6f35409f9e447bf37f64840f5b65576bfb78 before a11212910cf09b2fe8db9afa41ef60c4f81879c5 | CNA record |
References
- https://git.kernel.org/stable/c/e03253f5d65ebcd2a6d479f140c3bd9c7e4fb84a
- https://git.kernel.org/stable/c/cd12d3e08620257fbcaa262785d7f4b9473afc7a
- https://git.kernel.org/stable/c/86a0e945fb645ea90233fde239cd2de79f01974c
- https://git.kernel.org/stable/c/a11212910cf09b2fe8db9afa41ef60c4f81879c5
The CVE record on cve.org NVD's entry
The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.