8.4

CVE-2026-64118: linux Double Free

CVSS: 8.4v3.1HighModified
AliasesUBUNTU-CVE-2026-64118DEBIAN-CVE-2026-64118
Published 19-07-2026Last modified 19-10-2026
Open JSON

Vulnerability summary

CVE-2026-64118 is a high (CVSS 8.4) Double Free vulnerability in linux. EPSS estimates a 0.15% chance of exploitation in the next 30 days, higher than 3.9% of scored vulnerabilities.

Overall risk
34/100
0100
Medium · default modelHow is this calculated?
CVSS score
8.4/10
010
High · v3.1 (CVE.org)
EPSS score
0.15%
0%100%
Low · 0.00 pp in 30 days
KEVNot listedIn no KEV catalog
RansomwareNone recordedNo known use recorded
Public exploits0No public exploits recorded

Advisory lineage

Upstream 0 · Downstream 37 · Related 37
OPENSUSE-SU-2026:21910-1SUSE-SU-2026:23477-1SUSE-SU-2026:23481-1SUSE-SU-2026:23528-1SUSE-SU-2026:23529-1SUSE-SU-2026:23881-1

Timeline

  1. 19-07-2026
    PublishedVulnerability first disclosed.
  2. 19-10-2026
    Last modifiedVulnerability information updated.

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.

CVSS metrics

4 scores · 4 sources · 1 version

EPSS trend

Probability

0.15%

Chance of exploitation in the next 30 days

Percentile

4%

Versus all other CVEs

30-day change

0.00 pp

From 0.15% on 19-09-2026

19-09-202619-10-2026
EPSS score
0.15%

Known exploited

Compare KEV catalogs

Not in any of the 3 tracked catalogs.

Public exploits

0 found

No public exploits indexed.

Weaknesses

CWE · root cause

Affected systems

Ubuntu167 products
  • linuxAll versions (No fix recorded) | < 5.15.0-198.208 | < 6.8.0-139.139 | < 7.0.0-28.28
  • linux-allwinner-5.19All versions (No fix recorded)
  • linux-awsAll versions (No fix recorded) | < 5.15.0-1117.124 | < 6.8.0-1064.67 | < 7.0.0-1009.9
  • linux-aws-5.0All versions (No fix recorded)
  • linux-aws-5.11All versions (No fix recorded)
Linux2 products
  • linux≥ fe56b9e6a8d957d6a20729d626027f800c17a2da, < 9fe030719bd083b766602692ee96c8c985798e3c | ≥ fe56b9e6a8d957d6a20729d626027f800c17a2da, < 06fa8e69019fd3c41a7b0ea8c5f509c3a33dc227 | ≥ fe56b9e6a8d957d6a20729d626027f800c17a2da, < 8cf5e4d2ca6b101d163c7423a426fb0aec34f7bb | ≥ fe56b9e6a8d957d6a20729d626027f800c17a2da, < 3904b993cc17ec5d7c5d3b57dbd0b775dafb9684 | ≥ fe56b9e6a8d957d6a20729d626027f800c17a2da, < bdf678a273cadbccc347f331ae2e93ff4d14834c | ≥ fe56b9e6a8d957d6a20729d626027f800c17a2da, < 0e47fc1c9181ae029e0e35a865cbf2adcbae626c | ≥ fe56b9e6a8d957d6a20729d626027f800c17a2da, < a04c207f0801abdd23a169b5f902a9845059a65a | ≥ fe56b9e6a8d957d6a20729d626027f800c17a2da, < 2bccfb8476ca5f3548afbd623dc7a6980d4e77de | 4.4
  • linux_kernel≥ 4.4, < 5.10.259 | ≥ 5.11, < 5.15.210 | ≥ 5.16, < 6.1.175 | ≥ 6.2, < 6.6.142 | ≥ 6.7, < 6.12.92 | ≥ 6.13, < 6.18.34 | ≥ 6.19, < 7.0.11 | 7.1:rc1 | 7.1:rc2 | 7.1:rc3 | 7.1:rc4
Debian1 product
  • linux< 6.1.176-1 | < 6.12.94-1 | < 7.0.12-1

3 vendors · 170 products

References

37 links
Show all 37 references