CVE-2026-90344

In the Linux kernel, the following vulnerability has been resolved: wifi: mac80211: disconnect on CSA to channel 0 The refactor for the CSA parsing erroneously equates channel zero and no information present, leading it to ignore a CSA on an AP that advertises a switch to that (invalid) channel. This leads to not disconnecting, which we should. For Intel devices, this can lead to a firmware crash. Fix this by using an int type for the channel number as well as the opclass, and using a (negative) value that cannot be encoded in the element to indicate it's not present.

CVSS

No CVSS.

References

Link	Resource
https://git.kernel.org/stable/c/099aadb2012d7490bc584cc5075ef11cbc33f2c3
https://git.kernel.org/stable/c/cf57f0a674cc3e3cda1a789359cc1238b61b9d7d
https://git.kernel.org/stable/c/e7bc5ab93acd1c3f54feeb9fa19ead3530168090
https://git.kernel.org/stable/c/eef374088450bb91626e133c7172b8a0e969a522

Configurations

No configuration.

History

17 Sep 2026, 17:17

Type	Values Removed	Values Added
New CVE

Information

Published : 2026-09-17 17:17

Updated : 2026-09-17 17:17

NVD link : CVE-2026-90344

Mitre link : CVE-2026-90344

CVE.ORG link : CVE-2026-90344

JSON object : View

Products Affected

No product.

CWE

No CWE.

{"id": "CVE-2026-90344", "cveTags": [], "metrics": {}, "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": "21c3f8f95554feff9bed15703e89adbe582e0383", "lessThan": "099aadb2012d7490bc584cc5075ef11cbc33f2c3", "versionType": "git"}, {"status": "affected", "version": "21c3f8f95554feff9bed15703e89adbe582e0383", "lessThan": "e7bc5ab93acd1c3f54feeb9fa19ead3530168090", "versionType": "git"}, {"status": "affected", "version": "21c3f8f95554feff9bed15703e89adbe582e0383", "lessThan": "eef374088450bb91626e133c7172b8a0e969a522", "versionType": "git"}, {"status": "affected", "version": "21c3f8f95554feff9bed15703e89adbe582e0383", "lessThan": "cf57f0a674cc3e3cda1a789359cc1238b61b9d7d", "versionType": "git"}], "programFiles": ["net/mac80211/spectmgmt.c"], "defaultStatus": "unaffected"}, {"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "product": "Linux", "versions": [{"status": "affected", "version": "6.9"}, {"status": "unaffected", "version": "0", "lessThan": "6.9", "versionType": "semver"}, {"status": "unaffected", "version": "6.12.110", "versionType": "semver", "lessThanOrEqual": "6.12.*"}, {"status": "unaffected", "version": "6.18.52", "versionType": "semver", "lessThanOrEqual": "6.18.*"}, {"status": "unaffected", "version": "7.2.6", "versionType": "semver", "lessThanOrEqual": "7.2.*"}, {"status": "unaffected", "version": "7.3-rc1", "versionType": "original_commit_for_fix", "lessThanOrEqual": "*"}], "programFiles": ["net/mac80211/spectmgmt.c"], "defaultStatus": "affected"}]}], "published": "2026-09-17T17:17:33.103", "references": [{"url": "https://git.kernel.org/stable/c/099aadb2012d7490bc584cc5075ef11cbc33f2c3", "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}, {"url": "https://git.kernel.org/stable/c/cf57f0a674cc3e3cda1a789359cc1238b61b9d7d", "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}, {"url": "https://git.kernel.org/stable/c/e7bc5ab93acd1c3f54feeb9fa19ead3530168090", "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}, {"url": "https://git.kernel.org/stable/c/eef374088450bb91626e133c7172b8a0e969a522", "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}], "vulnStatus": "Received", "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nwifi: mac80211: disconnect on CSA to channel 0\n\nThe refactor for the CSA parsing erroneously equates channel\nzero and no information present, leading it to ignore a CSA\non an AP that advertises a switch to that (invalid) channel.\nThis leads to not disconnecting, which we should. For Intel\ndevices, this can lead to a firmware crash.\n\nFix this by using an int type for the channel number as well\nas the opclass, and using a (negative) value that cannot be\nencoded in the element to indicate it's not present."}], "lastModified": "2026-09-17T17:17:33.103", "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}