CVE-2026-98611Medium· 4.4▾ SunlitA flaw was found in the Linux kernel's BPF (Berkeley Packet Filter) subsystem. The bpf_crypto_ctx_create() function attempts to read reserved fields from a parameter structure prior to verifying that the supplied buffer is sufficiently lar…
▾ Sunlit zone — Low / medium · no exploitation signal
impact 24.2 · 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 CSAF
0.2%
Last analysed / modified upstream
— → 4.4
none → medium
A flaw was found in the Linux kernel's BPF (Berkeley Packet Filter) subsystem. The bpf_crypto_ctx_create() function attempts to read reserved fields from a parameter structure prior to verifying that the supplied buffer is sufficiently large. A local user capable of loading BPF programs can exploit this issue by supplying an undersized buffer, causing an out-of-bounds read from kernel memory. This flaw could lead to the exposure of sensitive kernel information or trigger a system crash resulting in a Denial of Service (DoS).
kernel: bpf: Check params size before reading reserved fields — rated Moderate by Red Hat. Released 2026-10-18, updated 2026-10-21.
Affected:
No fix planned:
Not affected:
Fix deferred
Field changes observed since this record was first indexed.
Connected by shared product, vendor, weakness, or advisory.
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