CVE-2026-98591Medium· 6.7▾ SunlitA flaw was found in the Linux kernel's BPF (Berkeley Packet Filter) subsystem. An integer underflow in the bounds-checking logic for network packet buffer pointers allows validation checks to pass incorrectly. A local user capable of runni…
▾ Sunlit zone — Low / medium · no exploitation signal
impact 36.9 · 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
Last analysed / modified upstream
0.2%
— → 6.7
none → medium
0.2% → 0.2%
A flaw was found in the Linux kernel's BPF (Berkeley Packet Filter) subsystem. An integer underflow in the bounds-checking logic for network packet buffer pointers allows validation checks to pass incorrectly. A local user capable of running BPF programs could exploit this flaw to create pointers referencing invalid memory, potentially leading to out-of-bounds memory access, a denial of service (system crash), or privilege escalation.
kernel: bpf: Fix bounds check for skb-backed dynptrs — rated Moderate by Red Hat. Released 2026-10-18, updated 2026-10-20.
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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