CVE-2026-68402High· 7.1▾ TwilightIn the Linux kernel, the following vulnerability has been resolved: wifi: cfg80211: bound element ID read when checking non-inheritance cfg80211_is_element_inherited() reads the first data octet of the candidate element (id = elem->dat…
▾ Twilight zone — High severity, or a signal on a lesser flaw
impact 39.1 · likelihood 0.1 · exploitation 0
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Stakeholder-Specific Vulnerability Categorization from CISA's ADP record at CVE.org: whether exploitation is observed, whether an attack can be automated, and how much of the system is at stake. The CVSS score shown above comes from the assigning CNA record, not NVD.
Exploit-prediction probability, daily snapshots since Oct 16.
Disclosure to exploitation, from the record and what we observed since indexing it.
Disclosed via CVEORG
0.3%
Last analysed / modified upstream
0.3% → 0.3%
In the Linux kernel, the following vulnerability has been resolved:
wifi: cfg80211: bound element ID read when checking non-inheritance
cfg80211_is_element_inherited() reads the first data octet of the candidate element (id = elem->data[0]) to look it up in an extension non-inheritance list. It does so after testing elem->id, but without verifying that the element actually has a data octet. A zero-length extension element (WLAN_EID_EXTENSION with length 0) therefore makes it read one octet past the end of the element.
_ieee802_11_parse_elems_full() runs this check for every element of a frame once a non-inheritance context exists -- e.g. while parsing a per-STA profile of a Multi-Link element in a (re)association response, or a non-transmitted BSS profile -- so a crafted frame from an AP can trigger a one-octet slab-out-of-bounds read during element parsing:
BUG: KASAN: slab-out-of-bounds in cfg80211_is_element_inherited Read of size 1 ... in net/wireless/scan.c
Return early (treat the element as inherited) when an extension element carries no data, mirroring the existing handling of empty ID lists.
The bug was found by fuzzing ieee802_11_parse_elems_full() under KASAN.
Linux >= f7dacfb11475ba777e1e84ccec2e14b0ba5a17a3 < 521dd5fe6d12b0d3c275f919738dc3a07117f4a5Linux >= f7dacfb11475ba777e1e84ccec2e14b0ba5a17a3 < 24154c172246ae3f0e69bb17c9111095685ceedcLinux >= f7dacfb11475ba777e1e84ccec2e14b0ba5a17a3 < 2d31ebb26a14f103c9cdc5287fb20cb2d4bde901Linux >= f7dacfb11475ba777e1e84ccec2e14b0ba5a17a3 < 20c308d9a57722801961f816395bf825f7bde6bcLinux >= f7dacfb11475ba777e1e84ccec2e14b0ba5a17a3 < 84bd907361c56fbd5523eceb2682cb39da059bd5Linux >= f7dacfb11475ba777e1e84ccec2e14b0ba5a17a3 < 11ac7a5e75f5132f1778e0c60981d30dc29fb869Linux >= f7dacfb11475ba777e1e84ccec2e14b0ba5a17a3 < ddf2773bcc8e49a43c561f22ec1e7924215d7947Linux >= f7dacfb11475ba777e1e84ccec2e14b0ba5a17a3 < cb8afea4655ff004fa7feee825d5c79783525383Linux 5.2Refer to the linked advisories for vendor-supplied fixes and affected version ranges.
Connected by shared product, vendor, weakness, or advisory.
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