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CVE-2026-74341

wifi: wcn36xx: fix heap overflow from oversized firmware HAL response

HIGH
8.8
CVSS Score
Published: August 15, 2026 at 05:58 AM UTC
Updated: August 17, 2026 at 06:19 AM UTC
1 product affected across 1 vendorLinux Kernel

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Severity
HIGH8.8
Exploit prediction
EPSS 0.5%

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

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

Linux Kernel· Linux
95%
3.13 ≤ v < 6.1.1783.13 ≤ v < 6.12.973.13 ≤ v < 6.18.403.13 ≤ v < 6.6.1453.13 ≤ v < 7.1.53.13 ≤ v < 7.23.138e84c25821698bdef73c0329fb2022a4673b7adc
Vendor states this is fixed in 15545ee71301e82d26d9a31b407ed0019eb62a60 (fixed)
Vendor states this is fixed in 18813b90032bfaafb225906a4d2b51be4dfc02c3 (fixed)
Vendor states this is fixed in 1b5d8a248c3afa640bcc99fa95abcd1e36f3ee18 (fixed)
Vendor states this is fixed in 88a240d86d3d64521f9194abe185ac71cc74d0bd (fixed)
Vendor states this is fixed in cfc67aee0c83e7f5d43a1dad3e25c789e9cc1d92 (fixed)
Vendor states this is fixed in dae9cadf0925f1cbfb71306d60490890df3870a6 (fixed)
Vendor states this is fixed in 3.13 (unaffected)
Vendor states this is fixed in 6.1.178 (unaffected)
Vendor states this is fixed in 6.12.97 (unaffected)
Vendor states this is fixed in 6.18.40 (unaffected)
Vendor states this is fixed in 6.6.145 (unaffected)
Vendor states this is fixed in 7.1.5 (unaffected)
Vendor states this is fixed in 7.2 (unaffected)

Remediation

No guide yet

No remediation guidance has been written for this CVE yet, and no fixed version or vendor advisory is recorded against it.

References (6)

Source: cverecord
https://git.kernel.org/stable/c/dae9cadf0925f1cbfb71306d60490890df3870a6
Source: cverecord
https://git.kernel.org/stable/c/cfc67aee0c83e7f5d43a1dad3e25c789e9cc1d92
Source: cverecord
https://git.kernel.org/stable/c/15545ee71301e82d26d9a31b407ed0019eb62a60
Source: cverecord
https://git.kernel.org/stable/c/1b5d8a248c3afa640bcc99fa95abcd1e36f3ee18
Source: cverecord
https://git.kernel.org/stable/c/18813b90032bfaafb225906a4d2b51be4dfc02c3
Source: cverecord
https://git.kernel.org/stable/c/88a240d86d3d64521f9194abe185ac71cc74d0bd

CVSS

8.8HIGHLinux
Vector?

Quick Info

StatusRECEIVED

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