CVE-2026-89581High· 7.0▾ TwilightA flaw was found in the Linux kernel's handling of Berkeley Packet Filter (BPF) programs on x86 architecture. An issue with how per-CPU addresses are resolved into extended registers can lead to incorrect memory access. A local attacker co…
▾ Twilight zone — High severity, or a signal on a lesser flaw
impact 38.5 · likelihood 0 · exploitation 0
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Exploit-prediction probability, daily snapshots since Sep 12.
Disclosure to exploitation, from the record and what we observed since indexing it.
Disclosed via CSAF
0.2%
— → 5.5
none → medium
— → 7.8
none → high
7.8 → 5.5
high → medium
5.5 → 7.8
medium → high
7.8 → 5.5
high → medium
Last analysed / modified upstream
5.5 → 7
medium → high
A flaw was found in the Linux kernel's handling of Berkeley Packet Filter (BPF) programs on x86 architecture. An issue with how per-CPU addresses are resolved into extended registers can lead to incorrect memory access. A local attacker could exploit this by running a specially crafted BPF program. This could cause a kernel panic, resulting in a denial of service (DoS) to the system.
kernel: bpf, x86: Fix per-CPU address resolution into an extended register — rated Moderate by Red Hat. Released 2026-09-11, updated 2026-09-18.
Affected:
No fix planned:
Not affected:
Affected
Field changes observed since this record was first indexed.
Connected by shared product, vendor, weakness, or advisory.
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