PT-2026-61435 · Linux · Linux

CVE-2026-64118 · Published 2026-07-19 · Updated 2026-07-19

NVD

CVSS v3.1

8.4

High

Base vector

AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

In the Linux kernel, the following vulnerability has been resolved:

qed: fix double free in qed cxt tables alloc()

If one of the later PF or VF CID bitmap allocations fails, qed cid map alloc() jumps to cid map fail and frees the previously allocated CID bitmaps before returning an error. qed cxt tables alloc() then calls qed cxt mngr free(), which invokes qed cid map free() again.

Fix this by setting each CID bitmap pointer to NULL after bitmap free() to avoid double free.

The bug was first flagged by an experimental analysis tool we are developing for kernel memory-management bugs while analyzing v6.13-rc1. The tool is still under development and is not yet publicly available. Manual inspection confirms that the bug is still present in v7.1-rc3.

Runtime reproduction was not attempted because exercising the failing allocation path requires device-specific setup.

Fix

Related Identifiers

CVE-2026-64118

Affected Products

Linux

References · 9

• https://nvd.nist.gov/vuln/detail/CVE-2026-64118 · Security Note
• https://git.kernel.org/stable/c/06fa8e69019fd3c41a7b0ea8c5f509c3a33dc227 · Note
• https://git.kernel.org/stable/c/a04c207f0801abdd23a169b5f902a9845059a65a · Note
• https://git.kernel.org/stable/c/bdf678a273cadbccc347f331ae2e93ff4d14834c · Note
• https://git.kernel.org/stable/c/8cf5e4d2ca6b101d163c7423a426fb0aec34f7bb · Note
• https://git.kernel.org/stable/c/9fe030719bd083b766602692ee96c8c985798e3c · Note
• https://git.kernel.org/stable/c/2bccfb8476ca5f3548afbd623dc7a6980d4e77de · Note
• https://git.kernel.org/stable/c/3904b993cc17ec5d7c5d3b57dbd0b775dafb9684 · Note
• https://git.kernel.org/stable/c/0e47fc1c9181ae029e0e35a865cbf2adcbae626c · Note