CVE-2026-89580High· 7.0▾ TwilightA flaw was found in the Linux kernel's BPF (Berkeley Packet Filter) subsystem. A local attacker could exploit a timing issue in the `__bpf_get_stack` function. This occurs when a preemptible BPF program is scheduled out, allowing another t…
▾ 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%
— → 6.3
none → medium
— → 7.8
none → high
7.8 → 6.3
high → medium
6.3 → 7.8
medium → high
7.8 → 6.3
high → medium
Last analysed / modified upstream
6.3 → 7
medium → high
A flaw was found in the Linux kernel's BPF (Berkeley Packet Filter) subsystem. A local attacker could exploit a timing issue in the __bpf_get_stack function. This occurs when a preemptible BPF program is scheduled out, allowing another task to overwrite a per-CPU buffer. This leads to an out-of-bounds write, potentially causing memory corruption.
kernel: bpf: Disable preemption in __bpf_get_stack — 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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