CVE-2026-98183

Summary

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.

Affected Software

VendorProductVersion RangeStatus
LinuxLinux8b40b1d24a6099fe9fac8e207d4cb04ab5e0baae < 3beddbd56946577478fd5e649f556aaaebe15b0aaffected
LinuxLinux8b40b1d24a6099fe9fac8e207d4cb04ab5e0baae < e6031f02269c0f51cf67886d177f02bc300b47cdaffected
LinuxLinux7.2affected
LinuxLinux0 < 7.2unaffected
LinuxLinux7.2.8 <= 7.2.*unaffected
LinuxLinux7.3-rc4 <= *unaffected

Weaknesses

References