# CVE-2026-68351: wifi: carl9170: bound memcpy length in cmd callback to prevent OOB read

Status: published. Published: 2026-08-10. Updated: 2026-11-06.

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

wifi: carl9170: bound memcpy length in cmd callback to prevent OOB read

When the firmware sends a command response with a length mismatch,
carl9170_cmd_callback() logs the mismatch and calls carl9170_restart()
but then falls through to memcpy(ar->readbuf, buffer + 4, len - 4).
Since len comes from the firmware and can exceed ar->readlen, this
copies more data than the readbuf was allocated for.

Bound the memcpy to min(len - 4, ar->readlen) so that the response
is still completed -- avoiding repeated restarts from queued garbage --
while preventing an overread past the response buffer.

## Remediation

No remediation reported in collected sources

## Affected products and versions

- Linux / Linux: ≥ a84fab3cbfdc427e7d366f1cc844f27b2084c26c; < 38e240996a6a78c94ab07d461fd66e361d55c3c4 (affected, git); ≥ a84fab3cbfdc427e7d366f1cc844f27b2084c26c; < 2d05c321d27624c413c950278d2dc8e0f44a8950 (affected, git); ≥ a84fab3cbfdc427e7d366f1cc844f27b2084c26c; < 525036b20ef01d814a7fcd0567d123992e4479fa (affected, git); ≥ a84fab3cbfdc427e7d366f1cc844f27b2084c26c; < f74e34e66379e487a09009a4f2d42470051672bd (affected, git); ≥ a84fab3cbfdc427e7d366f1cc844f27b2084c26c; < 500c36649f270de05a56591fcc1aaaa36687958e (affected, git); ≥ a84fab3cbfdc427e7d366f1cc844f27b2084c26c; < 9aee949c68dc6dccbc54333537b109c53fe2079f (affected, git); ≥ a84fab3cbfdc427e7d366f1cc844f27b2084c26c; < cb7a38810cf25738176dac32dec7a146b3f959cf (affected, git); ≥ a84fab3cbfdc427e7d366f1cc844f27b2084c26c; < 4cde55b2feff9504d1f993ab80e84e7ccb62791c (affected, git). Source: CNA: Linux
- Linux / Linux: 2.6.37 (affected); ≥ 0; < 2.6.37 (unaffected, semver); ≥ 5.10.265; ≤ 5.10.* (unaffected, semver); ≥ 5.15.216; ≤ 5.15.* (unaffected, semver); ≥ 6.1.183; ≤ 6.1.* (unaffected, semver); ≥ 6.6.148; ≤ 6.6.* (unaffected, semver); ≥ 6.12.101; ≤ 6.12.* (unaffected, semver); ≥ 6.18.42; ≤ 6.18.* (unaffected, semver); ≥ 7.1.6; ≤ 7.1.* (unaffected, semver); ≥ 7.2; ≤ * (unaffected, original_commit_for_fix). Source: CNA: Linux

## Severity and prioritization

- CISA KEV: No listing in collected sources

- EPSS: 0.22% as of 2026-11-06; percentile 12.61%

- 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/38e240996a6a78c94ab07d461fd66e361d55c3c4 (CNA: Linux)

- https://git.kernel.org/stable/c/2d05c321d27624c413c950278d2dc8e0f44a8950 (CNA: Linux)

- https://git.kernel.org/stable/c/525036b20ef01d814a7fcd0567d123992e4479fa (CNA: Linux)

- https://git.kernel.org/stable/c/f74e34e66379e487a09009a4f2d42470051672bd (CNA: Linux)

- https://git.kernel.org/stable/c/500c36649f270de05a56591fcc1aaaa36687958e (CNA: Linux)

- https://git.kernel.org/stable/c/9aee949c68dc6dccbc54333537b109c53fe2079f (CNA: Linux)

- https://git.kernel.org/stable/c/cb7a38810cf25738176dac32dec7a146b3f959cf (CNA: Linux)

- https://git.kernel.org/stable/c/4cde55b2feff9504d1f993ab80e84e7ccb62791c (CNA: Linux)

- https://git.kernel.org/stable/c/2d05c321d27624c413c950278d2dc8e0f44a8950 (416baaa9-dc9f-4396-8d5f-8c081fb06d67)

- https://git.kernel.org/stable/c/38e240996a6a78c94ab07d461fd66e361d55c3c4 (416baaa9-dc9f-4396-8d5f-8c081fb06d67)

- https://git.kernel.org/stable/c/4cde55b2feff9504d1f993ab80e84e7ccb62791c (416baaa9-dc9f-4396-8d5f-8c081fb06d67)

- https://git.kernel.org/stable/c/500c36649f270de05a56591fcc1aaaa36687958e (416baaa9-dc9f-4396-8d5f-8c081fb06d67)

- https://git.kernel.org/stable/c/525036b20ef01d814a7fcd0567d123992e4479fa (416baaa9-dc9f-4396-8d5f-8c081fb06d67)

- https://git.kernel.org/stable/c/9aee949c68dc6dccbc54333537b109c53fe2079f (416baaa9-dc9f-4396-8d5f-8c081fb06d67)

- https://git.kernel.org/stable/c/cb7a38810cf25738176dac32dec7a146b3f959cf (416baaa9-dc9f-4396-8d5f-8c081fb06d67)

- https://git.kernel.org/stable/c/f74e34e66379e487a09009a4f2d42470051672bd (416baaa9-dc9f-4396-8d5f-8c081fb06d67)

## Provenance

- CNA: Linux: https://www.cve.org/CVERecord?id=CVE-2026-68351; retrieved 2026-11-06; source updated 2026-11-06

- NVD: https://nvd.nist.gov/vuln/detail/CVE-2026-68351; retrieved 2026-11-06; source updated 2026-11-06

- FIRST EPSS: https://api.first.org/data/v1/epss?cve=CVE-2026-68351; retrieved 2026-11-06; source updated Not reported

Revision: 0e489db9e9a473310ce7c5f868536468f1baa49be6a47c10411600f8e9de52db

Canonical: https://y2.dev/cve/CVE-2026-68351

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