CVE-2025-37943: Linux kernel · wifi: ath12k: Fix invalid data access in ath12k_dp_rx_h_undecap_nwifi
Source GCVE Database
Not known to be exploited · CVSS 7.8 High.
Data as of 13 Nov 2026, 19:22 UTC
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:HExploitation evidence
Disclosed: evidence found.
CVE published 20 May 2025
Detectable: no evidence on record.
No public nuclei template indexed
Weaponized: no evidence on record.
No public exploit code indexed in Metasploit or Exploit-DB
Exploited in the wildExploited: no evidence on record.
Not in CISA KEV and no source reports exploitation
Observed by OffSeq MirageSeen by Mirage: no evidence on record.
No attack traffic recorded by OffSeq Mirage sensors
A missing step is not evidence of safety. Sources: cve.org (opens in a new tab), the Metasploit, Exploit-DB and nuclei-templates index as of 13 Nov 2026.
What to do
AI-suggested
A fix has been implemented that adds a sanity check to prevent invalid data access in the affected function. Users should apply the official Linux kernel updates that include this patch once available. Since this is not a cloud service, manual patching is required. Patch status is not explicitly confirmed in the provided data; users should consult the official Linux kernel advisories for the fixed versions and apply updates accordingly.
Description
CVE-2025-37943 is a high-severity vulnerability in the Linux kernel's ath12k Wi-Fi driver. It involves invalid data access in the ath12k_dp_rx_h_undecap_nwifi function when processing packets with lengths exceeding the maximum native Wi-Fi header length. This flaw can lead to memory corruption. A sanity check was added to prevent this invalid access. The issue was tested on specific Qualcomm hardware.
References
- nvd.nist.gov/vuln/detail/CVE-2025-37943 (opens in a new tab)
- git.kernel.org/stable/c/3abe15e756481c45f6acba3d476cb3ca4afc3b61 (opens in a new tab)
- git.kernel.org/stable/c/50be1fb76556e80af9f5da80f28168b6c71bce58 (opens in a new tab)
- git.kernel.org/stable/c/6ee653194ddb83674913fd2727b8ecfae0597ade (opens in a new tab)
- git.kernel.org/stable/c/7f1d986da5c6abb75ffe4d0d325fc9b341c41a1c (opens in a new tab)
- git.kernel.org/stable/c/9a0dddfb30f120db3851627935851d262e4e7acb (opens in a new tab)