wifi: mwifiex: bound the pairwise-cipher OUI walk to the IE length
In the Linux kernel, the following vulnerability has been resolved: wifi: mwifiex: bound the pairwise-cipher OUI walk to the IE length mwifiex_search_oui_in_ie() reads a pairwise-cipher (PTK) count from a beacon/probe-response RSN or WPA information element and then walks that many 4-byte OUIs, comparing each with memcmp(). The count comes straight from the (attacker-supplied) IE and is never checked against the element's own length, and the callers admit the element on element_id alone (has_ieee_hdr() / has_vendor_hdr(), no length check). A crafted RSN/WPA IE with a large pairwise count therefore makes the walk read up to 255 * 4 bytes past the element -- an out-of-bounds read of the kmemdup()'d beacon buffer, reachable from any AP whose beacon/probe response is processed during scan-result parsing. Pass the number of IE bytes available at the OUI list and bound the walk to the element. Keep the length signed and reject a negative value before any unsigned arithmetic, so a small or zero IE length cannot underflow to a large size_t and defeat the bound. Found by 0sec automated security-research tooling (https://0sec.ai).
CVE-2026-98186
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-2026-98186
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": "5e6e3a92b9a4c9416b17f468fa5c7fa2233b8b4e",
"lessThan": "77e642af7f2f6029e12a35c847c56cbd0466e799",
"versionType": "git"
},
{
"status": "affected",
"version": "5e6e3a92b9a4c9416b17f468fa5c7fa2233b8b4e",
"lessThan": "982b8fcdbb28f63bbbf02f0822c0bbda12ec27ed",
"versionType": "git"
},
{
"status": "affected",
"version": "5e6e3a92b9a4c9416b17f468fa5c7fa2233b8b4e",
"lessThan": "58767b41f87244eebaa5a475b9d276c83b89b933",
"versionType": "git"
},
{
"status": "affected",
"version": "5e6e3a92b9a4c9416b17f468fa5c7fa2233b8b4e",
"lessThan": "2402c9e2644b7e10c7aaaf87bf12743d7e363559",
"versionType": "git"
},
{
"status": "affected",
"version": "5e6e3a92b9a4c9416b17f468fa5c7fa2233b8b4e",
"lessThan": "54a9cc5bd70b0d77a5069d4c46998c679a10c857",
"versionType": "git"
},
{
"status": "affected",
"version": "5e6e3a92b9a4c9416b17f468fa5c7fa2233b8b4e",
"lessThan": "8bbef2b1ebfbadc0b9c37bbbf9c9e26fe2e41960",
"versionType": "git"
},
{
"status": "affected",
"version": "5e6e3a92b9a4c9416b17f468fa5c7fa2233b8b4e",
"lessThan": "46cda9d42f0d6ec3057d878ddb1f38c0ab9f51df",
"versionType": "git"
},
{
"status": "affected",
"version": "5e6e3a92b9a4c9416b17f468fa5c7fa2233b8b4e",
"lessThan": "e667aee1c192d67d27c803007bfa9c6e0873e959",
"versionType": "git"
}
],
"programFiles": [
"drivers/net/wireless/marvell/mwifiex/scan.c"
],
"defaultStatus": "unaffected"
},
{
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"product": "Linux",
"versions": [
{
"status": "affected",
"version": "3.0"
},
{
"status": "unaffected",
"version": "0",
"lessThan": "3.0",
"versionType": "semver"
},
{
"status": "unaffected",
"version": "5.10.271",
"versionType": "semver",
"lessThanOrEqual": "5.10.*"
},
{
"status": "unaffected",
"version": "5.15.222",
"versionType": "semver",
"lessThanOrEqual": "5.15.*"
},
{
"status": "unaffected",
"version": "6.1.189",
"versionType": "semver",
"lessThanOrEqual": "6.1.*"
},
{
"status": "unaffected",
"version": "6.6.158",
"versionType": "semver",
"lessThanOrEqual": "6.6.*"
},
{
"status": "unaffected",
"version": "6.12.112",
"versionType": "semver",
"lessThanOrEqual": "6.12.*"
},
{
"status": "unaffected",
"version": "6.18.54",
"versionType": "semver",
"lessThanOrEqual": "6.18.*"
},
{
"status": "unaffected",
"version": "7.2.8",
"versionType": "semver",
"lessThanOrEqual": "7.2.*"
},
{
"status": "unaffected",
"version": "7.3",
"versionType": "original_commit_for_fix",
"lessThanOrEqual": "*"
}
],
"programFiles": [
"drivers/net/wireless/marvell/mwifiex/scan.c"
],
"defaultStatus": "affected"
}
]- Related CVEs
- CVE-2026-98186
Source reference:
/cveMetadata/cveId
Publisher severity
No explicit severity was provided.
- Event
- #38269 · Revision 1
- Added to Heist Feed
- Publisher date