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.

Package Linux Kernel
Published 2026-10-06
Last modified 2026-10-06
Patch available
Yes

Affected versions

Linux kernel versions 7.2 and later are affected. Fixed in 7.2.8, 7.3-rc4 and their respective stable series.

Affected from
≥ 7.2
Fixed in
✓ 7.2.8 7.2.x ✓ 7.3-rc4

References

2 total

Frequently asked questions

  • What is CVE-2026-98183?

    CVE-2026-98183 is a unscored severity Linux kernel vulnerability . It affects Linux kernel versions from 7.2 onward and has been patched in 7.2.8 and 7.3-rc4. CVE-2026-98183 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.

  • Is there a patch available for CVE-2026-98183?

    Yes. CVE-2026-98183 has been patched. Fixed versions include 7.2.8 and 7.3-rc4. If you are running Linux kernel 7.2 or later up to the fix versions, apply the relevant patch for your kernel branch.

  • Is CVE-2026-98183 actively exploited?

    No. CVE-2026-98183 has not been confirmed as actively exploited. It is not listed in the CISA Known Exploited Vulnerabilities (KEV) catalog.

Back to
All CVEs
View on
NVD / NIST