# CVE-2022-49967: bpf: Fix a data-race around bpf_jit_limit.

Status: published. Published: 2025-06-18. Updated: 2026-11-05.

In the Linux kernel, the following vulnerability has been resolved:

bpf: Fix a data-race around bpf_jit_limit.

While reading bpf_jit_limit, it can be changed concurrently via sysctl,
WRITE_ONCE() in __do_proc_doulongvec_minmax(). The size of bpf_jit_limit
is long, so we need to add a paired READ_ONCE() to avoid load-tearing.

## Remediation

No remediation reported in collected sources

## Affected products and versions

- Linux / Linux: ≥ ede95a63b5e84ddeea6b0c473b36ab8bfd8c6ce3; < ba632ad0bacb13197a8f38e7526448974e87f292 (affected, git); ≥ ede95a63b5e84ddeea6b0c473b36ab8bfd8c6ce3; < 0947ae1121083d363d522ff7518ee72b55bd8d29 (affected, git); c98446e1bab6253ddce7144cc2a91c400a323839 (affected, git); a1fe647042affe713a17243cd10e9b25f3d83948 (affected, git); 43caa29c99db5a41b204e8ced01b00e151335ca8 (affected, git); ≥ 4.9.190; < 4.10 (affected, semver); ≥ 4.14.140; < 4.15 (affected, semver); ≥ 4.19.47; < 4.20 (affected, semver). Source: CNA: Linux
- Linux / Linux: 4.20 (affected); ≥ 0; < 4.20 (unaffected, semver); ≥ 5.19.8; ≤ 5.19.* (unaffected, semver); ≥ 6.0; ≤ * (unaffected, original_commit_for_fix). Source: CNA: Linux

## Severity and prioritization

- CISA KEV: No listing in collected sources

- EPSS: 0.14% as of 2026-11-05; percentile 3.70%

- SSVC: exploitation none; automatable no; technical impact partial; source ADP: CISA-ADP

- Weaknesses: Not reported

## Exploit evidence

No exploit evidence in collected sources. This is not proof of no exploitation.

## References

- https://git.kernel.org/stable/c/ba632ad0bacb13197a8f38e7526448974e87f292 (CNA: Linux)

- https://git.kernel.org/stable/c/0947ae1121083d363d522ff7518ee72b55bd8d29 (CNA: Linux)

## Provenance

- CNA: Linux: https://www.cve.org/CVERecord?id=CVE-2022-49967; retrieved 2026-11-05; source updated 2026-11-05

- FIRST EPSS: https://api.first.org/data/v1/epss?cve=CVE-2022-49967; retrieved 2026-11-05; source updated Not reported

Revision: 30f864d6724c7f16051aed4f3d98e324d90464a7dff03aa5f179d20315bc580c

Canonical: https://y2.dev/cve/CVE-2022-49967

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