wifi: mac80211: avoid out-of-bounds read for empty PREQ elements
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.
CVE-2026-98183
Primary source · Revision 1
Imported from structured advisory data. Source references identify upstream records or fields; verify affected versions and your deployed configuration.
Security context
Source reference: cve:CVE-2026-98183
Linux
Source reference: /containers/cna/affected/0/product
- Affected versions
- Not stated in this record
- Fixed versions
- Not stated in this record
- Prerequisites
- Not stated in this record
Linux
Source reference: /containers/cna/affected/1/product
- Affected versions
- Not stated in this record
- Fixed versions
- Not stated in this record
- Prerequisites
- Not stated in this record
Structured affected-version data
Original package identities and version rules from this source.
[
{
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"product": "Linux",
"versions": [
{
"status": "affected",
"version": "8b40b1d24a6099fe9fac8e207d4cb04ab5e0baae",
"lessThan": "3beddbd56946577478fd5e649f556aaaebe15b0a",
"versionType": "git"
},
{
"status": "affected",
"version": "8b40b1d24a6099fe9fac8e207d4cb04ab5e0baae",
"lessThan": "e6031f02269c0f51cf67886d177f02bc300b47cd",
"versionType": "git"
}
],
"programFiles": [
"include/linux/ieee80211-mesh.h"
],
"defaultStatus": "unaffected"
},
{
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"product": "Linux",
"versions": [
{
"status": "affected",
"version": "7.2"
},
{
"status": "unaffected",
"version": "0",
"lessThan": "7.2",
"versionType": "semver"
},
{
"status": "unaffected",
"version": "7.2.8",
"versionType": "semver",
"lessThanOrEqual": "7.2.*"
},
{
"status": "unaffected",
"version": "7.3",
"versionType": "original_commit_for_fix",
"lessThanOrEqual": "*"
}
],
"programFiles": [
"include/linux/ieee80211-mesh.h"
],
"defaultStatus": "affected"
}
]- Related CVEs
- CVE-2026-98183
Source reference:
/cveMetadata/cveId
Publisher severity
No explicit severity was provided.
- Event
- #38266 · Revision 1
- Added to Heist Feed
- Publisher date