What’s Vulnerable › Vulnerabilities

CVE-2026-74341: wifi: wcn36xx: fix heap overflow from oversized firmware HAL response

• Severity: high (CVSS 8.8 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.5% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2026-08-15 · updated 2026-10-30

Description

In the Linux kernel, the following vulnerability has been resolved: wifi: wcn36xx: fix heap overflow from oversized firmware HAL response The firmware response dispatcher copies all synchronous HAL responses into the 4096-byte hal_buf without validating the response length. A response exceeding WCN36XX_HAL_BUF_SIZE causes a heap buffer overflow with firmware-controlled content. Add a bounds check on the response length.

Affected products

• Linux: 3.13 — fixed in 7.2

How to fix

Upgrade to a fixed version: Linux 7.2. Check the vendor advisory for mitigations.

References

• https://git.kernel.org/stable/c/15545ee71301e82d26d9a31b407ed0019eb62a60
• https://git.kernel.org/stable/c/18813b90032bfaafb225906a4d2b51be4dfc02c3
• https://git.kernel.org/stable/c/1b5d8a248c3afa640bcc99fa95abcd1e36f3ee18
• https://git.kernel.org/stable/c/7acc1995bdcfdd82b2dd0dc735b1a4b076ae88a0
• https://git.kernel.org/stable/c/88a240d86d3d64521f9194abe185ac71cc74d0bd
• https://git.kernel.org/stable/c/b80c4b5268c297b0503f65ef18038327e2119ad1
• https://git.kernel.org/stable/c/cfc67aee0c83e7f5d43a1dad3e25c789e9cc1d92
• https://git.kernel.org/stable/c/dae9cadf0925f1cbfb71306d60490890df3870a6

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