CVE-2026-68402
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…
Does this matter?
High impact if exploited, but EPSS currently rates exploitation as unlikely (0.27%). Schedule it in the normal patch cycle and watch for a rise in EPSS or a public exploit.
Description
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.
- CVSS 3.1
- 7.1 HIGHCVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:H
- EPSS
- 0.27% probability · 19th percentile
- CISA KEV
- Not listed
- Source
- 416baaa9-dc9f-4396-8d5f-8c081fb06d67
References
- https://git.kernel.org/stable/c/11ac7a5e75f5132f1778e0c60981d30dc29fb869
- https://git.kernel.org/stable/c/20c308d9a57722801961f816395bf825f7bde6bc
- https://git.kernel.org/stable/c/24154c172246ae3f0e69bb17c9111095685ceedc
- https://git.kernel.org/stable/c/2d31ebb26a14f103c9cdc5287fb20cb2d4bde901
- https://git.kernel.org/stable/c/521dd5fe6d12b0d3c275f919738dc3a07117f4a5
- https://git.kernel.org/stable/c/84bd907361c56fbd5523eceb2682cb39da059bd5
- https://git.kernel.org/stable/c/cb8afea4655ff004fa7feee825d5c79783525383
- https://git.kernel.org/stable/c/ddf2773bcc8e49a43c561f22ec1e7924215d7947
Source: NVD record, EPSS from FIRST.org, KEV from CISA. Refreshed daily.