# CVE-2026-68349: wifi: carl9170: fix buffer overflow in rx_stream failover path

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

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

wifi: carl9170: fix buffer overflow in rx_stream failover path

The failover continuation in carl9170_rx_stream() copies the full tlen
from the second USB transfer instead of capping at rx_failover_missing
bytes. When both transfers are near maximum size, the total exceeds the
65535-byte failover SKB, triggering skb_over_panic.

Limit the copy size to the missing byte count.

[Fix checkpatch CHECK:PARENTHESIS_ALIGNMENT]

## Remediation

No remediation reported in collected sources

## Affected products and versions

- Linux / Linux: ≥ a84fab3cbfdc427e7d366f1cc844f27b2084c26c; < 5fb00a09e9b0375e1ad9d4fefc4a62a67e7ea658 (affected, git); ≥ a84fab3cbfdc427e7d366f1cc844f27b2084c26c; < 48c81fb523ecdc6a4b8654944ff32e499f21e6d0 (affected, git); ≥ a84fab3cbfdc427e7d366f1cc844f27b2084c26c; < a1ce01764a812c22a47d30aea78e347aebd3eea1 (affected, git); ≥ a84fab3cbfdc427e7d366f1cc844f27b2084c26c; < 5acfa18de66b6089b81c1c0bf1a3ae3c940ec39e (affected, git); ≥ a84fab3cbfdc427e7d366f1cc844f27b2084c26c; < b9dfee5e63ee9b5c47be9e344ebc5bd3f43fca78 (affected, git); ≥ a84fab3cbfdc427e7d366f1cc844f27b2084c26c; < 4503829843353dbb18b879c35be1cdfc9af677b7 (affected, git); ≥ a84fab3cbfdc427e7d366f1cc844f27b2084c26c; < 21f59906ea75618fdd46a7e32754d54fbee083ea (affected, git); ≥ a84fab3cbfdc427e7d366f1cc844f27b2084c26c; < a1a21995c2e1cc2ca6b2226cfe4f5f018370182a (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: 0.20% as of 2026-11-06; percentile 10.41%

- 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/5fb00a09e9b0375e1ad9d4fefc4a62a67e7ea658 (CNA: Linux)

- https://git.kernel.org/stable/c/48c81fb523ecdc6a4b8654944ff32e499f21e6d0 (CNA: Linux)

- https://git.kernel.org/stable/c/a1ce01764a812c22a47d30aea78e347aebd3eea1 (CNA: Linux)

- https://git.kernel.org/stable/c/5acfa18de66b6089b81c1c0bf1a3ae3c940ec39e (CNA: Linux)

- https://git.kernel.org/stable/c/b9dfee5e63ee9b5c47be9e344ebc5bd3f43fca78 (CNA: Linux)

- https://git.kernel.org/stable/c/4503829843353dbb18b879c35be1cdfc9af677b7 (CNA: Linux)

- https://git.kernel.org/stable/c/21f59906ea75618fdd46a7e32754d54fbee083ea (CNA: Linux)

- https://git.kernel.org/stable/c/a1a21995c2e1cc2ca6b2226cfe4f5f018370182a (CNA: Linux)

- https://git.kernel.org/stable/c/21f59906ea75618fdd46a7e32754d54fbee083ea (416baaa9-dc9f-4396-8d5f-8c081fb06d67)

- https://git.kernel.org/stable/c/4503829843353dbb18b879c35be1cdfc9af677b7 (416baaa9-dc9f-4396-8d5f-8c081fb06d67)

- https://git.kernel.org/stable/c/48c81fb523ecdc6a4b8654944ff32e499f21e6d0 (416baaa9-dc9f-4396-8d5f-8c081fb06d67)

- https://git.kernel.org/stable/c/5acfa18de66b6089b81c1c0bf1a3ae3c940ec39e (416baaa9-dc9f-4396-8d5f-8c081fb06d67)

- https://git.kernel.org/stable/c/5fb00a09e9b0375e1ad9d4fefc4a62a67e7ea658 (416baaa9-dc9f-4396-8d5f-8c081fb06d67)

- https://git.kernel.org/stable/c/a1a21995c2e1cc2ca6b2226cfe4f5f018370182a (416baaa9-dc9f-4396-8d5f-8c081fb06d67)

- https://git.kernel.org/stable/c/a1ce01764a812c22a47d30aea78e347aebd3eea1 (416baaa9-dc9f-4396-8d5f-8c081fb06d67)

- https://git.kernel.org/stable/c/b9dfee5e63ee9b5c47be9e344ebc5bd3f43fca78 (416baaa9-dc9f-4396-8d5f-8c081fb06d67)

## Provenance

- CNA: Linux: https://www.cve.org/CVERecord?id=CVE-2026-68349; retrieved 2026-11-06; source updated 2026-11-06

- NVD: https://nvd.nist.gov/vuln/detail/CVE-2026-68349; retrieved 2026-11-06; source updated 2026-11-06

- FIRST EPSS: https://api.first.org/data/v1/epss?cve=CVE-2026-68349; retrieved 2026-11-06; source updated Not reported

Revision: 7d47968e89431298c3365e27efb958f4f771c402d706ffbb726d2c5db2e991fa

Canonical: https://y2.dev/cve/CVE-2026-68349

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