{"id":"CVE-2026-74341","title":"wifi: wcn36xx: fix heap overflow from oversized firmware HAL response","summary":"In the Linux kernel, the following vulnerability has been resolved:\n\nwifi: wcn36xx: fix heap overflow from oversized firmware HAL response\n\nThe firmware response dispatcher copies all synchronous HAL responses\ninto the 4096-byte hal_buf …","severity":"high","cvss":8.8,"cvssVector":"CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","cvssSource":"cna","vendor":"Linux","product":"Linux","affected":["Linux >= 8e84c25821698bdef73c0329fb2022a4673b7adc < 7acc1995bdcfdd82b2dd0dc735b1a4b076ae88a0","Linux >= 8e84c25821698bdef73c0329fb2022a4673b7adc < b80c4b5268c297b0503f65ef18038327e2119ad1","Linux >= 8e84c25821698bdef73c0329fb2022a4673b7adc < dae9cadf0925f1cbfb71306d60490890df3870a6","Linux >= 8e84c25821698bdef73c0329fb2022a4673b7adc < cfc67aee0c83e7f5d43a1dad3e25c789e9cc1d92","Linux >= 8e84c25821698bdef73c0329fb2022a4673b7adc < 15545ee71301e82d26d9a31b407ed0019eb62a60","Linux >= 8e84c25821698bdef73c0329fb2022a4673b7adc < 1b5d8a248c3afa640bcc99fa95abcd1e36f3ee18","Linux >= 8e84c25821698bdef73c0329fb2022a4673b7adc < 18813b90032bfaafb225906a4d2b51be4dfc02c3","Linux >= 8e84c25821698bdef73c0329fb2022a4673b7adc < 88a240d86d3d64521f9194abe185ac71cc74d0bd","Linux 3.13"],"published":"2026-08-15","updated":"2026-10-30","sourceUpdated":"2026-10-30T12:29:46.830Z","source":"CVEORG","sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2026-74341","references":[{"url":"https://git.kernel.org/stable/c/7acc1995bdcfdd82b2dd0dc735b1a4b076ae88a0"},{"url":"https://git.kernel.org/stable/c/b80c4b5268c297b0503f65ef18038327e2119ad1"},{"url":"https://git.kernel.org/stable/c/dae9cadf0925f1cbfb71306d60490890df3870a6"},{"url":"https://git.kernel.org/stable/c/cfc67aee0c83e7f5d43a1dad3e25c789e9cc1d92"},{"url":"https://git.kernel.org/stable/c/15545ee71301e82d26d9a31b407ed0019eb62a60"},{"url":"https://git.kernel.org/stable/c/1b5d8a248c3afa640bcc99fa95abcd1e36f3ee18"},{"url":"https://git.kernel.org/stable/c/18813b90032bfaafb225906a4d2b51be4dfc02c3"},{"url":"https://git.kernel.org/stable/c/88a240d86d3d64521f9194abe185ac71cc74d0bd"}],"tags":["cve.org"],"epss":0.00532,"epssPercentile":0.45251,"ingestedAt":"2026-11-05T15:02:32.538Z","slug":"CVE-2026-74341","body":"## Overview\n\nIn the Linux kernel, the following vulnerability has been resolved:\n\nwifi: wcn36xx: fix heap overflow from oversized firmware HAL response\n\nThe firmware response dispatcher copies all synchronous HAL responses\ninto the 4096-byte hal_buf without validating the response length. A\nresponse exceeding WCN36XX_HAL_BUF_SIZE causes a heap buffer overflow\nwith firmware-controlled content.\n\nAdd a bounds check on the response length.\n\n## Affected\n\n- `Linux >= 8e84c25821698bdef73c0329fb2022a4673b7adc < 7acc1995bdcfdd82b2dd0dc735b1a4b076ae88a0`\n- `Linux >= 8e84c25821698bdef73c0329fb2022a4673b7adc < b80c4b5268c297b0503f65ef18038327e2119ad1`\n- `Linux >= 8e84c25821698bdef73c0329fb2022a4673b7adc < dae9cadf0925f1cbfb71306d60490890df3870a6`\n- `Linux >= 8e84c25821698bdef73c0329fb2022a4673b7adc < cfc67aee0c83e7f5d43a1dad3e25c789e9cc1d92`\n- `Linux >= 8e84c25821698bdef73c0329fb2022a4673b7adc < 15545ee71301e82d26d9a31b407ed0019eb62a60`\n- `Linux >= 8e84c25821698bdef73c0329fb2022a4673b7adc < 1b5d8a248c3afa640bcc99fa95abcd1e36f3ee18`\n- `Linux >= 8e84c25821698bdef73c0329fb2022a4673b7adc < 18813b90032bfaafb225906a4d2b51be4dfc02c3`\n- `Linux >= 8e84c25821698bdef73c0329fb2022a4673b7adc < 88a240d86d3d64521f9194abe185ac71cc74d0bd`\n- `Linux 3.13`\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.","depth":"twilight","depthScore":49,"depthScoreParts":{"impact":48.4,"likelihood":0.1,"exploitation":0,"ransomware":0},"changes":[]}