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 Details
- CVSS 3.1 Base Score: 7.1
- CVSS 3.1 Vector: (CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:H)
Covered by Rapid7
| Product | Vendor Advisory | Solution File | Added | Published |
|---|---|---|---|---|
| Debian | — | Upgrade linux-6.12Upgrade linux | Aug 11, 2026 | Aug 11, 2026 |
| Redhat_linux | — | Upgrade kernelNo solution existsUpgrade kernel-rt | Aug 13, 2026 | Aug 10, 2026 |
| Rocky_linux | — | Upgrade kernel-rt-debug-modulesUpgrade kernel-debug-modules-coreUpgrade kernel-debug-modulesUpgrade kernel-rt-debug-debuginfoUpgrade kernel-rt-modules-coreUpgrade kernel-zfcpdump-modules-coreUpgrade kernel-rt-modules-extraUpgrade kernel-rtUpgrade kernel-modulesUpgrade kernel-zfcpdump-develUpgrade rvUpgrade kernel-debug-modules-extraUpgrade kernel-zfcpdump-modulesUpgrade kernel-debuginfo-common-x86_64Upgrade kernel-rt-debug-coreUpgrade kernel-debug-debuginfoUpgrade kernel-tools-libsUpgrade libperf-debuginfoUpgrade kernelUpgrade kernel-rt-debuginfoUpgrade kernel-devel-matchedUpgrade kernel-tools-libs-develUpgrade kernel-debug-devel-matchedUpgrade kernel-zfcpdumpUpgrade kernel-debuginfo-common-s390xUpgrade kernel-rt-debug-develUpgrade kernel-uki-virt-addonsUpgrade kernel-zfcpdump-coreUpgrade libperfUpgrade kernel-modules-coreUpgrade kernel-toolsUpgrade kernel-rt-develUpgrade kernel-debug-coreUpgrade perfUpgrade kernel-tools-debuginfoUpgrade kernel-coreUpgrade perf-debuginfoUpgrade kernel-zfcpdump-devel-matchedUpgrade kernel-debug-uki-virtUpgrade kernel-debugUpgrade kernel-develUpgrade kernel-zfcpdump-debuginfoUpgrade python3-perfUpgrade kernel-zfcpdump-modules-extraUpgrade kernel-rt-modulesUpgrade kernel-rt-debug-modules-coreUpgrade kernel-rt-debugUpgrade python3-perf-debuginfoUpgrade kernel-rt-debug-modules-extraUpgrade kernel-modules-extraUpgrade kernel-debuginfoUpgrade rtlaUpgrade kernel-uki-virtUpgrade kernel-rt-coreUpgrade kernel-debug-devel | Sep 17, 2026 | Sep 15, 2026 |
| Vmware Photon_os | — | Use 'tdnf update' to upgrade all packages to the latest version. | Aug 17, 2026 | Aug 10, 2026 |
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