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VulnerabilityPublished Updated

CVE-2025-37943: Linux kernel · wifi: ath12k: Fix invalid data access in ath12k_dp_rx_h_undecap_nwifi

Source GCVE Database

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Not known to be exploited · CVSS 7.8 High.

Data as of 13 Nov 2026, 19:22 UTC

CVSS 3.1 base score
7.8High
How severe the flaw is on the 0–10 CVSS scale.
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Exploitation evidence

  1. Disclosed: evidence found.

    CVE published 20 May 2025

  2. Detectable: no evidence on record.

    No public nuclei template indexed

  3. Weaponized: no evidence on record.

    No public exploit code indexed in Metasploit or Exploit-DB

  4. Exploited in the wild: no evidence on record.

    Not in CISA KEV and no source reports exploitation

  5. Observed by OffSeq 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

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