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.

CVSS v3 8.8 HIGH

8.8^/10

CVSS v3 : HIGH

Vector :

Exploitability : 2.8 / Impact : 5.9

Attack Vector ADJACENT_NETWORK

Attack Complexity LOW

Privileges Required NONE

User Interaction NONE

Confidentiality Impact HIGH

Integrity Impact HIGH

Availability Impact HIGH

Scope UNCHANGED

References

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

Configurations

No configuration.

History

No history.

Information

Published : 2026-08-15 06:22

Updated : 2026-08-17 06:19

NVD link : CVE-2026-74341

Mitre link : CVE-2026-74341

CVE.ORG link : CVE-2026-74341

JSON object : View

Products Affected

No product.

CWE

No CWE.

{"id": "CVE-2026-74341", "cveTags": [], "metrics": {"cvssMetricV31": [{"type": "Secondary", "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "cvssData": {"scope": "UNCHANGED", "version": "3.1", "baseScore": 8.8, "attackVector": "ADJACENT_NETWORK", "baseSeverity": "HIGH", "vectorString": "CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H", "integrityImpact": "HIGH", "userInteraction": "NONE", "attackComplexity": "LOW", "availabilityImpact": "HIGH", "privilegesRequired": "NONE", "confidentialityImpact": "HIGH"}, "impactScore": 5.9, "exploitabilityScore": 2.8}]}, "affected": [{"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "affectedData": [{"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "product": "Linux", "versions": [{"status": "affected", "version": "8e84c25821698bdef73c0329fb2022a4673b7adc", "lessThan": "dae9cadf0925f1cbfb71306d60490890df3870a6", "versionType": "git"}, {"status": "affected", "version": "8e84c25821698bdef73c0329fb2022a4673b7adc", "lessThan": "cfc67aee0c83e7f5d43a1dad3e25c789e9cc1d92", "versionType": "git"}, {"status": "affected", "version": "8e84c25821698bdef73c0329fb2022a4673b7adc", "lessThan": "15545ee71301e82d26d9a31b407ed0019eb62a60", "versionType": "git"}, {"status": "affected", "version": "8e84c25821698bdef73c0329fb2022a4673b7adc", "lessThan": "1b5d8a248c3afa640bcc99fa95abcd1e36f3ee18", "versionType": "git"}, {"status": "affected", "version": "8e84c25821698bdef73c0329fb2022a4673b7adc", "lessThan": "18813b90032bfaafb225906a4d2b51be4dfc02c3", "versionType": "git"}, {"status": "affected", "version": "8e84c25821698bdef73c0329fb2022a4673b7adc", "lessThan": "88a240d86d3d64521f9194abe185ac71cc74d0bd", "versionType": "git"}], "programFiles": ["drivers/net/wireless/ath/wcn36xx/smd.c"], "defaultStatus": "unaffected"}, {"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "product": "Linux", "versions": [{"status": "affected", "version": "3.13"}, {"status": "unaffected", "version": "0", "lessThan": "3.13", "versionType": "semver"}, {"status": "unaffected", "version": "6.1.178", "versionType": "semver", "lessThanOrEqual": "6.1.*"}, {"status": "unaffected", "version": "6.6.145", "versionType": "semver", "lessThanOrEqual": "6.6.*"}, {"status": "unaffected", "version": "6.12.97", "versionType": "semver", "lessThanOrEqual": "6.12.*"}, {"status": "unaffected", "version": "6.18.40", "versionType": "semver", "lessThanOrEqual": "6.18.*"}, {"status": "unaffected", "version": "7.1.5", "versionType": "semver", "lessThanOrEqual": "7.1.*"}, {"status": "unaffected", "version": "7.2", "versionType": "original_commit_for_fix", "lessThanOrEqual": "*"}], "programFiles": ["drivers/net/wireless/ath/wcn36xx/smd.c"], "defaultStatus": "affected"}]}], "published": "2026-08-15T06:22:35.127", "references": [{"url": "https://git.kernel.org/stable/c/15545ee71301e82d26d9a31b407ed0019eb62a60", "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}, {"url": "https://git.kernel.org/stable/c/18813b90032bfaafb225906a4d2b51be4dfc02c3", "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}, {"url": "https://git.kernel.org/stable/c/1b5d8a248c3afa640bcc99fa95abcd1e36f3ee18", "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}, {"url": "https://git.kernel.org/stable/c/88a240d86d3d64521f9194abe185ac71cc74d0bd", "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}, {"url": "https://git.kernel.org/stable/c/cfc67aee0c83e7f5d43a1dad3e25c789e9cc1d92", "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}, {"url": "https://git.kernel.org/stable/c/dae9cadf0925f1cbfb71306d60490890df3870a6", "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}], "vulnStatus": "Received", "descriptions": [{"lang": "en", "value": "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 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."}], "lastModified": "2026-08-17T06:19:28.620", "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}