What is CVE-2026-43009?

CVE-2026-43009 is a high-severity vulnerability in Linux. CVSS score: 7.8/10. Published 2026-05-01.

How severe is CVE-2026-43009?

High severity. CVSS v3 base score is 7.8 out of 10.

Vulnerability in Linux

CVE-2026-43009

In the Linux kernel, the following vulnerability has been resolved: bpf: Fix incorrect pruning due to atomic fetch precision tracking When backtrack_insn encounters a BPF_STX instruction with BPF_ATOMIC and BPF_FETCH, the src register (o…

EPSS: 0.000 (4.2th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 7.8 (High). Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H.

Affected products

Linux — versions 5ca419f2864a2c60940dcf4bbaeb69546200e36f, 5.12, 0
Linux Linux_kernel — versions 7.0

References

416baaa9-dc9f-4396-8d5f-8c081fb06d67 (Patch)
416baaa9-dc9f-4396-8d5f-8c081fb06d67 (Patch)

Frequently asked questions

What is CVE-2026-43009?: CVE-2026-43009 is a high-severity vulnerability in Linux. CVSS score: 7.8/10. Published 2026-05-01.
How severe is CVE-2026-43009?: High severity. CVSS v3 base score is 7.8 out of 10.