CVE-2026-98526

llc: reserve device headroom for allocated frames

State: Published
Severity: Not scored
Published: Oct 18, 2026
Updated: Oct 19, 2026
Reserved: Sep 25, 2026

Description

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.

Scores

The record has no CVSS score.

Weaknesses

The record names no weakness.

Affected Products

Product	Versions
LinuxLinux	bf9ae5386bca8836c16e69ab8fdbe46767d7452a to before 018020f5a48cc86fdd6dc2d380f6c70443ae7639Affected bf9ae5386bca8836c16e69ab8fdbe46767d7452a to before 3a3f57c4061d9e9cc3bc04205d36ce41ae3406c1Affected bf9ae5386bca8836c16e69ab8fdbe46767d7452a to before 7c38524b2b2456bd33cb360420da6cbf9cad1b33Affected bf9ae5386bca8836c16e69ab8fdbe46767d7452a to before 1937222c2511ac91377d39f28106c34734f5f8c6Affected bf9ae5386bca8836c16e69ab8fdbe46767d7452a to before 16ceac2daa89dd16917bc488ab05b9dd6961a603Affected bf9ae5386bca8836c16e69ab8fdbe46767d7452a to before e06f8b6e27cc616d3c587e9784c4a033eb310a16Affected bf9ae5386bca8836c16e69ab8fdbe46767d7452a to before 3361c93e417384ebf28003e0fb6d5304653d3b05Affected bf9ae5386bca8836c16e69ab8fdbe46767d7452a to before 72b5b9a28b996e09b8b5b944370c79851bb68f52Affected
LinuxLinux	2.6.34Affected before 2.6.34Not affected 5.10.271 through 5.10.Not affected 5.15.222 through 5.15.Not affected 6.1.189 through 6.1.Not affected 6.6.158 through 6.6.Not affected 6.12.112 through 6.12.Not affected 6.18.55 through 6.18.Not affected 7.2.9 through 7.2.*Not affected 7.3 and laterNot affected

Product

Versions

LinuxLinux

bf9ae5386bca8836c16e69ab8fdbe46767d7452a to before 018020f5a48cc86fdd6dc2d380f6c70443ae7639Affected
bf9ae5386bca8836c16e69ab8fdbe46767d7452a to before 3a3f57c4061d9e9cc3bc04205d36ce41ae3406c1Affected
bf9ae5386bca8836c16e69ab8fdbe46767d7452a to before 7c38524b2b2456bd33cb360420da6cbf9cad1b33Affected
bf9ae5386bca8836c16e69ab8fdbe46767d7452a to before 1937222c2511ac91377d39f28106c34734f5f8c6Affected
bf9ae5386bca8836c16e69ab8fdbe46767d7452a to before 16ceac2daa89dd16917bc488ab05b9dd6961a603Affected
bf9ae5386bca8836c16e69ab8fdbe46767d7452a to before e06f8b6e27cc616d3c587e9784c4a033eb310a16Affected
bf9ae5386bca8836c16e69ab8fdbe46767d7452a to before 3361c93e417384ebf28003e0fb6d5304653d3b05Affected
bf9ae5386bca8836c16e69ab8fdbe46767d7452a to before 72b5b9a28b996e09b8b5b944370c79851bb68f52Affected

LinuxLinux

2.6.34Affected
before 2.6.34Not affected
5.10.271 through 5.10.*Not affected
5.15.222 through 5.15.*Not affected
6.1.189 through 6.1.*Not affected
6.6.158 through 6.6.*Not affected
6.12.112 through 6.12.*Not affected
6.18.55 through 6.18.*Not affected
7.2.9 through 7.2.*Not affected
7.3 and laterNot affected

References

Every record here comes from the CVE Program’s CVE List. © 1999–2026 The MITRE Corporation. CVE is a registered trademark of The MITRE Corporation. The records are reproduced under the CVE Program terms of use.