CVEvulnerability
CVE-2026-98526
- Status
- Received
- Published
- 2026-10-18
- Last modified
- 2026-10-19
- Assigner
- 416baaa9-dc9f-4396-8d5f-8c081fb06d67
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.
References
- https://git.kernel.org/stable/c/018020f5a48cc86fdd6dc2d380f6c70443ae7639 git.kernel.org
- https://git.kernel.org/stable/c/16ceac2daa89dd16917bc488ab05b9dd6961a603 git.kernel.org
- https://git.kernel.org/stable/c/1937222c2511ac91377d39f28106c34734f5f8c6 git.kernel.org
- https://git.kernel.org/stable/c/3361c93e417384ebf28003e0fb6d5304653d3b05 git.kernel.org
- https://git.kernel.org/stable/c/3a3f57c4061d9e9cc3bc04205d36ce41ae3406c1 git.kernel.org
- https://git.kernel.org/stable/c/72b5b9a28b996e09b8b5b944370c79851bb68f52 git.kernel.org
- https://git.kernel.org/stable/c/7c38524b2b2456bd33cb360420da6cbf9cad1b33 git.kernel.org
- https://git.kernel.org/stable/c/e06f8b6e27cc616d3c587e9784c4a033eb310a16 git.kernel.org