What’s Vulnerable › Vulnerabilities

CVE-2026-74340: wifi: wcn36xx: fix OOB read from firmware count in PRINT_REG_INFO indication

• Severity: high (CVSS 8.1 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.4% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2026-08-15 · updated 2026-10-16

Description

In the Linux kernel, the following vulnerability has been resolved: wifi: wcn36xx: fix OOB read from firmware count in PRINT_REG_INFO indication The firmware-controlled rsp->count field is used as the loop bound for indexing into the flexible rsp->regs[] array without validation against the message length. A count exceeding the actual data causes out-of- bounds reads from the heap-allocated message buffer. Add a check that count fits within the received message.

Affected products

• Linux kernel: 4.11 — fixed in 7.2

How to fix

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

References

• https://git.kernel.org/stable/c/0907c06dccae9e3c8d5a68eb9014beec73a36e79
• https://git.kernel.org/stable/c/22b0b8572a64362531dd0ed499b75e16282aeb2b
• https://git.kernel.org/stable/c/23d210877968657bd07e1a517e0b516db20a1d80
• https://git.kernel.org/stable/c/3cf92b44c4fb88a5e8de8733a4494c0956606bca
• https://git.kernel.org/stable/c/64228dfc4247aca178c01e5a37af7d8dcc7a6089
• https://git.kernel.org/stable/c/df2187acfca6c6cca372c5d35f42394d9c270b09
• https://git.kernel.org/stable/c/f03782f7f41f2afee5076a1ef08ced5649218771
• https://git.kernel.org/stable/c/f987efff29a5fe45320ea5991c9d5cb98b676953

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