CVE-2026-98183

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.