llc: reserve device headroom for allocated frames
In the Linux kernel, the following vulnerability has been resolved: llc: reserve device headroom for allocated frames llc_alloc_frame() reserves link-layer headroom using the device type. This is insufficient for stacked Ethernet devices such as VLAN devices, where vlan_dev_hard_header() pushes a VLAN header before the lower device's Ethernet header. An LLC response on such a device can therefore underflow skb headroom in eth_header(). Use LL_RESERVED_SPACE() to account for the device's actual required headroom while preserving the existing LLC device-type check.
CVE-2026-98526
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-2026-98526
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": "bf9ae5386bca8836c16e69ab8fdbe46767d7452a",
"lessThan": "018020f5a48cc86fdd6dc2d380f6c70443ae7639",
"versionType": "git"
},
{
"status": "affected",
"version": "bf9ae5386bca8836c16e69ab8fdbe46767d7452a",
"lessThan": "3a3f57c4061d9e9cc3bc04205d36ce41ae3406c1",
"versionType": "git"
},
{
"status": "affected",
"version": "bf9ae5386bca8836c16e69ab8fdbe46767d7452a",
"lessThan": "7c38524b2b2456bd33cb360420da6cbf9cad1b33",
"versionType": "git"
},
{
"status": "affected",
"version": "bf9ae5386bca8836c16e69ab8fdbe46767d7452a",
"lessThan": "1937222c2511ac91377d39f28106c34734f5f8c6",
"versionType": "git"
},
{
"status": "affected",
"version": "bf9ae5386bca8836c16e69ab8fdbe46767d7452a",
"lessThan": "16ceac2daa89dd16917bc488ab05b9dd6961a603",
"versionType": "git"
},
{
"status": "affected",
"version": "bf9ae5386bca8836c16e69ab8fdbe46767d7452a",
"lessThan": "e06f8b6e27cc616d3c587e9784c4a033eb310a16",
"versionType": "git"
},
{
"status": "affected",
"version": "bf9ae5386bca8836c16e69ab8fdbe46767d7452a",
"lessThan": "3361c93e417384ebf28003e0fb6d5304653d3b05",
"versionType": "git"
},
{
"status": "affected",
"version": "bf9ae5386bca8836c16e69ab8fdbe46767d7452a",
"lessThan": "72b5b9a28b996e09b8b5b944370c79851bb68f52",
"versionType": "git"
}
],
"programFiles": [
"net/llc/llc_sap.c"
],
"defaultStatus": "unaffected"
},
{
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"product": "Linux",
"versions": [
{
"status": "affected",
"version": "2.6.34"
},
{
"status": "unaffected",
"version": "0",
"lessThan": "2.6.34",
"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": "6.18.55",
"versionType": "semver",
"lessThanOrEqual": "6.18.*"
},
{
"status": "unaffected",
"version": "7.2.9",
"versionType": "semver",
"lessThanOrEqual": "7.2.*"
},
{
"status": "unaffected",
"version": "7.3",
"versionType": "original_commit_for_fix",
"lessThanOrEqual": "*"
}
],
"programFiles": [
"net/llc/llc_sap.c"
],
"defaultStatus": "affected"
}
]- Related CVEs
- CVE-2026-98526
Source reference:
/cveMetadata/cveId
Publisher severity
No explicit severity was provided.
- Event
- #38552 · Revision 1
- Added to Heist Feed
- Publisher date