CVE-2026-98183 (GCVE-0-2026-98183)

Vulnerability from cvelistv5 – Published: 2026-10-06 08:44 – Updated: 2026-10-06 08:44
VLAI
Title
wifi: mac80211: avoid out-of-bounds read for empty PREQ elements
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.
Severity
No CVSS data available.
Assigner
Linux CNA under the mitre root
CNA scorecard D 54/100 over 6633 records in the last 180 days details
References
Impacted products
Vendor Product Version CPE status
Linux Linux Affected: 8b40b1d24a6099fe9fac8e207d4cb04ab5e0baae , < 3beddbd56946577478fd5e649f556aaaebe15b0a (git)
Affected: 8b40b1d24a6099fe9fac8e207d4cb04ab5e0baae , < e6031f02269c0f51cf67886d177f02bc300b47cd (git)
guessed Create a notification for this product.
Linux Linux Affected: 7.2
Unaffected: 0 , < 7.2 (semver)
Unaffected: 7.2.8 , ≤ 7.2.* (semver)
Unaffected: 7.3-rc4 , ≤ * (original_commit_for_fix)
guessed Create a notification for this product.
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        }
      ],
      "providerMetadata": {
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            "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nwifi: mac80211: avoid out-of-bounds read for empty PREQ elements\n\nieee80211_mesh_preq_size_ok() derives the location of the PREQ bottom\nfields before checking whether the element contains even the fixed\nheader. ieee80211_mesh_hwmp_preq_get_bottom() reads the flags byte to\naccount for the optional Address Extension field. Consequently, an\nempty PREQ element causes a one-byte read beyond its declared payload.\n\nMove the helper call after both size checks, so the bottom fields are\nonly accessed when they are present."
          }
        ],
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        "metrics": {},
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      "url": "https://ftp.suse.com/pub/projects/security/csaf-vex/cve-2026-98183.json",
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    }
  }
}



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