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Review reviewHigh

CVE-2026-64218

Linux

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() insi...

CVSS
7.8
EPSS
-
- percentile
CISA KEV
Not listed
Published
2026.07.25
PRIORITY ASSESSMENT

Review review

The CVSS severity warrants an early asset and exposure review.

Known exploitationNot established by KEV
Exploit probability-
Technical severityCVSS 7.8

Vulnerability overview

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() insi...

Affected product and versions

Product
Linux
Affected versions
>= 23721387c409087fd3b97e274f34d3ddc0970b74 < ce2c0ee4d76d5ee4b391fe0e31334361e25030ec, >= 23721387c409087fd3b97e274f34d3ddc0970b74 < 3423a45e5c3d3c5129f88143a9a969787d7d5a0a, >= 23721387c409087fd3b97e274f34d3ddc0970b74 < f1303adb1e59582f76c22798a2e2e150e054a9e7, >= 23721387c409087fd3b97e274f34d3ddc0970b74 < 48663158222b3b7f6ee6791a67d512ede7fc94bb, >= 23721387c409087fd3b97e274f34d3ddc0970b74 < eeddd7bab3d59c1e98642a204141f8c5d6194707, >= 23721387c409087fd3b97e274f34d3ddc0970b74 < c6de1a5a9c406e30b91f1515a6ce05cc84023baa, >= 23721387c409087fd3b97e274f34d3ddc0970b74 < 95a7034661274cf5985708bd2f6d86ee46f88fa9, >= 23721387c409087fd3b97e274f34d3ddc0970b74 < 0459430add32ea41f3e2ef9351610e6d33627a6b, >= 3.5
Fixed versions
No verified fixed-version field is available yet

Recommended response sequence

Confirm exposure before applying a vendor-supported change.

Full remediation guide
  1. 1
    Identify

    Confirm that Linux and an affected version are present.

  2. 2
    Prioritize

    Combine exploitation signals with asset exposure and business criticality.

  3. 3
    Remediate

    Follow the vendor advisory or supported update path and preserve rollback options.

  4. 4
    Verify

    Recheck the version, service health, access paths, and relevant logs.

Technical data

CVSS vector
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
CWE
Not available
CVE-2026-64218 — Linux | SECUFOCUS NOW