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CVE-2026-64118

HIGHCVSS 8.4/10EPSS 0.15%

Last modified

CVE-2026-64118 is a high-severity vulnerability rated 8.4/10 on the CVSS scale. 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. EPSS estimates a 0.15% chance of exploitation in the next 30 days.

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.

Metrics

CVSS 3.1
8.4/10

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

EPSS Probability
0.15%

4.9th percentile

Probability of exploitation in the next 30 days. Learn more

Affected Software

Source: CNA advisory (CVE.org). NVD analysis pending.

VendorProductVersions
LinuxLinux>= fe56b9e6a8d957d6a20729d626027f800c17a2da, < 9fe030719bd083b766602692ee96c8c985798e3c; >= fe56b9e6a8d957d6a20729d626027f800c17a2da, < 06fa8e69019fd3c41a7b0ea8c5f509c3a33dc227; >= fe56b9e6a8d957d6a20729d626027f800c17a2da, < 8cf5e4d2ca6b101d163c7423a426fb0aec34f7bb; >= fe56b9e6a8d957d6a20729d626027f800c17a2da, < 3904b993cc17ec5d7c5d3b57dbd0b775dafb9684; >= fe56b9e6a8d957d6a20729d626027f800c17a2da, < bdf678a273cadbccc347f331ae2e93ff4d14834c; >= fe56b9e6a8d957d6a20729d626027f800c17a2da, < 0e47fc1c9181ae029e0e35a865cbf2adcbae626c; >= fe56b9e6a8d957d6a20729d626027f800c17a2da, < a04c207f0801abdd23a169b5f902a9845059a65a; >= fe56b9e6a8d957d6a20729d626027f800c17a2da, < 2bccfb8476ca5f3548afbd623dc7a6980d4e77de
LinuxLinux4.4

References

Timeline

Published
Last Modified
Status
Awaiting Analysis

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.
How severe is CVE-2026-64118?
CVE-2026-64118 has a CVSS score of 8.4/10 (HIGH severity). The EPSS model estimates a 0.15% probability of exploitation in the next 30 days.
How do I fix CVE-2026-64118?
Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

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Source: NVD / NIST