CVE-2026-98183wifi: mac80211: avoid out-of-bounds read for empty PREQ elements
Updated under an hour ago ()
Does this affect you?
It affects Linux. Add what you run to find out whether that includes you.
No exploitation reported and no EPSS estimate yet.
Do this next
Free account, 1 product
In the Linux kernel, the following vulnerability has been resolved: wifi: mac80211: avoid out-of-bounds read for empty PREQ elements ieee80211_mesh_preq_size_ok() derives the location of the PREQ bottom fields before checking whether the element contains even the fixed header. ieee80211_mesh_hwmp_preq_get_bottom() reads the flags byte to account for the optional Address Extension field. Consequently, an empty PREQ element causes a one-byte read beyond its declared payload. Move the helper call after both size checks, so the bottom fields are only accessed when they are present.
- CVSS
- Not yet scored
- Weakness (CWE)
- Not given
- Known exploited
- Not in CISA's KEV catalog
- EPSS (exploitation in the next 30 days)
- Not loaded for this CVE
- Assigned by
- Linux
- NVD analysis
- Received
- Record last updated
- Oct 6, 2026
- First seen by InfoSec Signals
- Oct 9, 2026
Affected products
Linux Linux linux:linux (from the name) | 8b40b1d24a6099fe9fac8e207d4cb04ab5e0baae builds before 3beddbd56946577478fd5e649f556aaaebe15b0a; from 8b40b1d24a6099fe9fac8e207d4cb04ab5e0baae before e6031f02269c0f51cf67886d177f02bc300b47cd | CNA record |
References
- https://git.kernel.org/stable/c/3beddbd56946577478fd5e649f556aaaebe15b0a
- https://git.kernel.org/stable/c/e6031f02269c0f51cf67886d177f02bc300b47cd
The CVE record on cve.org NVD's entry
The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.