CVE-2026-74341wifi: wcn36xx: fix heap overflow from oversized firmware HAL response
- 8.8HighCVSS base score
- 0.53%Exploitation in 30 daysEPSS · top 54% of all CVEs
- NoKnown exploitednot in CISA's KEV catalog
- NonePublic exploitsnone known yet
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.
Timeline
ID reserved
By Linux
Published
- 3 months later
· 3 months later
Record updated
Changes after publication (a new score, a public exploit, EPSS crossing 1, 10 or 50 %, leaving KEV) are kept since November 2026; earlier ones are not known.
Scores
| Scored by | CVSS | Score | Vector |
|---|---|---|---|
| LinuxCNA (assigner) | 3.1 | High8.8 | CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H |
| NVDNVD · Received | 3.1 | High8.8 | CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H |
- EPSS (exploitation in 30 days)
- 0.53% · top 54% of all CVEs (14 Nov 2026)
The list uses the assigner's score when there is one, then CISA's, then NVD's: High 8.8.
Affected products
- affected 8e84c25821698bdef73c0329fb2022a4673b7adc – < 7acc1995bdcfdd82b2dd0dc735b1a4b076ae88a0
- affected 8e84c25821698bdef73c0329fb2022a4673b7adc – < b80c4b5268c297b0503f65ef18038327e2119ad1
- affected 8e84c25821698bdef73c0329fb2022a4673b7adc – < dae9cadf0925f1cbfb71306d60490890df3870a6
- affected 8e84c25821698bdef73c0329fb2022a4673b7adc – < cfc67aee0c83e7f5d43a1dad3e25c789e9cc1d92
- affected 8e84c25821698bdef73c0329fb2022a4673b7adc – < 15545ee71301e82d26d9a31b407ed0019eb62a60
- affected 8e84c25821698bdef73c0329fb2022a4673b7adc – < 1b5d8a248c3afa640bcc99fa95abcd1e36f3ee18
- affected 8e84c25821698bdef73c0329fb2022a4673b7adc – < 18813b90032bfaafb225906a4d2b51be4dfc02c3
- affected 8e84c25821698bdef73c0329fb2022a4673b7adc – < 88a240d86d3d64521f9194abe185ac71cc74d0bd
- affected 3.13
- unaffected < 3.13
- unaffected 5.10.273 – ≤ 5.10.*
- unaffected 5.15.224 – ≤ 5.15.*
- unaffected 6.1.178 – ≤ 6.1.*
- unaffected 6.6.145 – ≤ 6.6.*
- unaffected 6.12.97 – ≤ 6.12.*
- unaffected 6.18.40 – ≤ 6.18.*
- unaffected 7.1.5 – ≤ 7.1.*
- unaffected 7.2 – ≤ *
References
References8
- https://git.kernel.org/stable/c/7acc1995bdcfdd82b2dd0dc735b1a4b076ae88a0 (opens in a new tab)
- https://git.kernel.org/stable/c/b80c4b5268c297b0503f65ef18038327e2119ad1 (opens in a new tab)
- https://git.kernel.org/stable/c/dae9cadf0925f1cbfb71306d60490890df3870a6 (opens in a new tab)
- https://git.kernel.org/stable/c/cfc67aee0c83e7f5d43a1dad3e25c789e9cc1d92 (opens in a new tab)
- https://git.kernel.org/stable/c/15545ee71301e82d26d9a31b407ed0019eb62a60 (opens in a new tab)
- https://git.kernel.org/stable/c/1b5d8a248c3afa640bcc99fa95abcd1e36f3ee18 (opens in a new tab)
- https://git.kernel.org/stable/c/18813b90032bfaafb225906a4d2b51be4dfc02c3 (opens in a new tab)
- https://git.kernel.org/stable/c/88a240d86d3d64521f9194abe185ac71cc74d0bd (opens in a new tab)
Sources
The same CVE in the primary databases and aggregators, to check against.
- CVE.org record (opens in a new tab)
- CVE List JSON (GitHub) (opens in a new tab)
- NVD (opens in a new tab)
- FIRST EPSS (opens in a new tab)
- EUVD EUVD-2026-59488 (opens in a new tab)
- OSV.dev (opens in a new tab)
- GitHub Advisories (opens in a new tab)
- CIRCL Vulnerability-Lookup (opens in a new tab)
Badge for a README or a ticket
[](https://cveledger.app/cve/CVE-2026-74341)Record last updated .