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CVE-2026-74341

HIGHCVSS 8.8/10EPSS 0.19%

Last modified

CVE-2026-74341 is a high-severity vulnerability rated 8.8/10 on the CVSS scale. 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.. EPSS estimates a 0.19% chance of exploitation in the next 30 days.

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.

Metrics

CVSS 3.1
8.8/10

CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

EPSS Probability
0.19%

9.0th percentile

Probability of exploitation in the next 30 days. Learn more

Affected Software

Source: CNA advisory (CVE.org). NVD analysis pending.

VendorProductVersions
LinuxLinux>= 8e84c25821698bdef73c0329fb2022a4673b7adc, < dae9cadf0925f1cbfb71306d60490890df3870a6; >= 8e84c25821698bdef73c0329fb2022a4673b7adc, < cfc67aee0c83e7f5d43a1dad3e25c789e9cc1d92; >= 8e84c25821698bdef73c0329fb2022a4673b7adc, < 15545ee71301e82d26d9a31b407ed0019eb62a60; >= 8e84c25821698bdef73c0329fb2022a4673b7adc, < 1b5d8a248c3afa640bcc99fa95abcd1e36f3ee18; >= 8e84c25821698bdef73c0329fb2022a4673b7adc, < 18813b90032bfaafb225906a4d2b51be4dfc02c3; >= 8e84c25821698bdef73c0329fb2022a4673b7adc, < 88a240d86d3d64521f9194abe185ac71cc74d0bd
LinuxLinux3.13

References

Timeline

Published
Last Modified
Status
Received

Frequently Asked Questions

What is CVE-2026-74341?
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.
How severe is CVE-2026-74341?
CVE-2026-74341 has a CVSS score of 8.8/10 (HIGH severity). The EPSS model estimates a 0.19% probability of exploitation in the next 30 days.
How do I fix CVE-2026-74341?
Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

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Source: NVD / NIST