7.8

CVE-2026-64218: linux

CVSS: 7.8v3.1HighAnalyzed
AliasesUBUNTU-CVE-2026-64218DEBIAN-CVE-2026-64218
Published 24-07-2026Last modified 05-08-2026
Open JSON

Vulnerability summary

CVE-2026-64218 is a high (CVSS 7.8) vulnerability in linux. EPSS estimates a 0.13% chance of exploitation in the next 30 days, higher than 2.3% of scored vulnerabilities.

Overall risk
31/100
0100
Medium · default modelHow is this calculated?
CVSS score
7.8/10
010
High · v3.1 (CVE.org)
EPSS score
0.13%
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 30 · Related 30
SUSE-SU-2026:23477-1SUSE-SU-2026:23481-1SUSE-SU-2026:23528-1SUSE-SU-2026:23529-1SUSE-SU-2026:4120-1SUSE-SU-2026:4254-1

Timeline

  1. 24-07-2026
    PublishedVulnerability first disclosed.
  2. 05-08-2026
    Last modifiedVulnerability information updated.

Description

In the Linux kernel, the following vulnerability has been resolved: batman-adv: bla: fix report_work leak on backbone_gw purge batadv_bla_purge_backbone_gw() removes stale backbone gateway entries, but fails to properly handle their associated report_work: - If report_work is running, the purge must wait for it to finish before freeing the backbone_gw, otherwise the worker may access freed memory (e.g. bat_priv). - If report_work is pending, the purge must cancel it and release the reference held for that pending work item. The previous implementation called hlist_for_each_entry_safe() inside a spin_lock_bh() section, but cancel_work_sync() may sleep and therefore cannot be called from within a spinlock-protected region. Restructure the loop to handle one entry per spinlock critical section: acquire the lock, find the next entry to purge, remove it from the hash list, then release the lock before calling cancel_work_sync() and dropping the hash_entry reference. Repeat until no more entries require purging.

CVSS metrics

4 scores · 4 sources · 1 version

EPSS trend

Probability

0.13%

Chance of exploitation in the next 30 days

Percentile

2%

Versus all other CVEs

30-day change

0.00 pp

From 0.13% on 20-09-2026

20-09-202620-10-2026
EPSS score
0.13%

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

No weakness data has been published for this record.

Affected systems

Ubuntu167 products
  • linuxAll versions (No fix recorded) | < 5.15.0-186.196 | < 6.8.0-139.139 | < 7.0.0-28.28
  • linux-allwinner-5.19All versions (No fix recorded)
  • linux-awsAll versions (No fix recorded) | < 5.15.0-1112.119 | < 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≥ 23721387c409087fd3b97e274f34d3ddc0970b74, < ce2c0ee4d76d5ee4b391fe0e31334361e25030ec | ≥ 23721387c409087fd3b97e274f34d3ddc0970b74, < 3423a45e5c3d3c5129f88143a9a969787d7d5a0a | ≥ 23721387c409087fd3b97e274f34d3ddc0970b74, < f1303adb1e59582f76c22798a2e2e150e054a9e7 | ≥ 23721387c409087fd3b97e274f34d3ddc0970b74, < 48663158222b3b7f6ee6791a67d512ede7fc94bb | ≥ 23721387c409087fd3b97e274f34d3ddc0970b74, < eeddd7bab3d59c1e98642a204141f8c5d6194707 | ≥ 23721387c409087fd3b97e274f34d3ddc0970b74, < c6de1a5a9c406e30b91f1515a6ce05cc84023baa | ≥ 23721387c409087fd3b97e274f34d3ddc0970b74, < 95a7034661274cf5985708bd2f6d86ee46f88fa9 | ≥ 23721387c409087fd3b97e274f34d3ddc0970b74, < 0459430add32ea41f3e2ef9351610e6d33627a6b | 3.5
  • linux_kernel≥ 3.5, < 5.10.258 | ≥ 5.11, < 5.15.209 | ≥ 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

36 links
Show all 36 references