CVE-2026-64118 (CVSS 8.4)

Description

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.

Is your site exposed to CVE-2026-64118?

Run a free security scan — no signup, results in seconds.

CVSS v3.1 Score

8.4

HIGH

CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

EPSS — Exploit Prediction

0.0015

Probability of exploitation

0.05%

Percentile rank

EPSS estimates the probability that this vulnerability will be exploited in the wild within the next 30 days. A higher score means more likely to be exploited.

References

Other References

https://git.kernel.org/stable/c/06fa8e69019fd3c41a7b0ea8c5f509c3a33dc227 https://git.kernel.org/stable/c/0e47fc1c9181ae029e0e35a865cbf2adcbae626c https://git.kernel.org/stable/c/2bccfb8476ca5f3548afbd623dc7a6980d4e77de https://git.kernel.org/stable/c/3904b993cc17ec5d7c5d3b57dbd0b775dafb9684 https://git.kernel.org/stable/c/8cf5e4d2ca6b101d163c7423a426fb0aec34f7bb https://git.kernel.org/stable/c/9fe030719bd083b766602692ee96c8c985798e3c https://git.kernel.org/stable/c/a04c207f0801abdd23a169b5f902a9845059a65a https://git.kernel.org/stable/c/bdf678a273cadbccc347f331ae2e93ff4d14834c

Frequently Asked Questions

What is CVE-2026-64118? +

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. It has a CVSS v3.1 base score of 8.4 (HIGH).

How severe is CVE-2026-64118? +

CVE-2026-64118 has a CVSS v3.1 score of 8.4 out of 10, rated HIGH. This is a high-severity vulnerability that should be prioritized for patching. The EPSS score is 0.0015, placing it in the 0th percentile for exploitation probability.

How do I check if I'm vulnerable to CVE-2026-64118? +

You can use Secably's free Website Scanner to check your website for known vulnerabilities. For infrastructure scanning, use the Port Scanner to identify exposed services that may be affected. Check the vendor advisories linked above for specific patch and version information.

CVE-2026-64118