What is CVE-2026-31413?

CVE-2026-31413 is a high-severity vulnerability in Linux, classified under Out-of-bounds Read. CVSS score: 7.8/10. Published 2026-04-12.

How severe is CVE-2026-31413?

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

Is CVE-2026-31413 known to be exploited?

1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.

Out-of-bounds Read in Linux

CVE-2026-31413

In the Linux kernel, the following vulnerability has been resolved: bpf: Fix unsound scalar forking in maybe_fork_scalars() for BPF_OR maybe_fork_scalars() is called for both BPF_AND and BPF_OR when the source operand is a constant. Whe…

Vulnerability class: Buffer Overflow

EPSS: 0.000 (1.4th 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 dea9989a3f3961faede93752cd81eb5a9514d911, 4c122e8ae14950cf6b59d208fc5160f7c601e746, e52567173ba86dbffb990595fbe60e2e83899372
Linux Linux_kernel

Weakness classification (CWE)

CWE-125 — Out-of-bounds Read

Public proof-of-concept exploits

Rat5ak/CVE-2026-31413-BPF-Container-Escape

References

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

Frequently asked questions

What is CVE-2026-31413?: CVE-2026-31413 is a high-severity vulnerability in Linux, classified under Out-of-bounds Read. CVSS score: 7.8/10. Published 2026-04-12.
How severe is CVE-2026-31413?: High severity. CVSS v3 base score is 7.8 out of 10.
Is CVE-2026-31413 known to be exploited?: 1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.