wifi: mac80211: handle empty FILS association request payload
In the Linux kernel, the following vulnerability has been resolved: wifi: mac80211: handle empty FILS association request payload fils_encrypt_assoc_req() accepts a (Re)Association Request frame whose last element is the FILS Session element. crypt_len is then zero and aes_siv_encrypt() is called with an empty plaintext. kmemdup() returns ZERO_SIZE_PTR for a zero-length allocation, so the unconditional sg_init_one() puts an invalid page into the scatterlist. With CONFIG_DEBUG_SG this triggers a kernel BUG in sg_set_buf(); without the debug check the bogus page is handed to the crypto backend. AES-SIV is defined for empty plaintext and the S2V result is then the complete output, so handle this case before the CTR step, which has nothing to encrypt.
CVE-2026-98698
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-2026-98698
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": "39404feee691a2dc524a629ed6eb5cfe5d8898d1",
"lessThan": "0b1e4a7eeb6a301ee33bd318982927cbdbae9f36",
"versionType": "git"
},
{
"status": "affected",
"version": "39404feee691a2dc524a629ed6eb5cfe5d8898d1",
"lessThan": "2f5b62f6534d336a62fdb9e88b186dd70b4323ef",
"versionType": "git"
},
{
"status": "affected",
"version": "39404feee691a2dc524a629ed6eb5cfe5d8898d1",
"lessThan": "452f1c9b76f7a122bbc4630b9691bda4809677c4",
"versionType": "git"
},
{
"status": "affected",
"version": "39404feee691a2dc524a629ed6eb5cfe5d8898d1",
"lessThan": "20f939b0c151d1d28e6b62a76b2454fa6fe877f2",
"versionType": "git"
},
{
"status": "affected",
"version": "39404feee691a2dc524a629ed6eb5cfe5d8898d1",
"lessThan": "5bfd4b0b40b79781d900cb2f7da0685070f53c67",
"versionType": "git"
}
],
"programFiles": [
"net/mac80211/fils_aead.c"
],
"defaultStatus": "unaffected"
},
{
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"product": "Linux",
"versions": [
{
"status": "affected",
"version": "4.10"
},
{
"status": "unaffected",
"version": "0",
"lessThan": "4.10",
"versionType": "semver"
},
{
"status": "unaffected",
"version": "6.6.160",
"versionType": "semver",
"lessThanOrEqual": "6.6.*"
},
{
"status": "unaffected",
"version": "6.12.113",
"versionType": "semver",
"lessThanOrEqual": "6.12.*"
},
{
"status": "unaffected",
"version": "6.18.56",
"versionType": "semver",
"lessThanOrEqual": "6.18.*"
},
{
"status": "unaffected",
"version": "7.2.10",
"versionType": "semver",
"lessThanOrEqual": "7.2.*"
},
{
"status": "unaffected",
"version": "7.3",
"versionType": "original_commit_for_fix",
"lessThanOrEqual": "*"
}
],
"programFiles": [
"net/mac80211/fils_aead.c"
],
"defaultStatus": "affected"
}
]- Related CVEs
- CVE-2026-98698
Source reference:
/cveMetadata/cveId
Publisher severity
No explicit severity was provided.
- Event
- #48911 · Revision 1
- Added to Heist Feed
- Publisher date