# CVE-2026-64218: linux: In the Linux kernel, the following vulnerability has been resolved: batman-adv: bla: fix report_work leak on backbon... CVE-2026-64218 is fixed in 31 products on 1 platform, first by DEBIAN-CVE-2026-64218, released July 25, 2026. It is not reported as exploited. Patch Radar priority: High. - Web page: https://patchblox.com/security/cve/CVE-2026-64218 - Priority: High - CVSS: 7.8 (high) - EPSS: 0.0013 - CISA KEV: not listed - Exploited (vendor report): no - Publicly disclosed: no - Published: Jul 24, 2026 ## 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. ## Where it's fixed | Platform | Product | Fixed in | Fix | Released | |---|---|---|---|---| | Linux | bpftool ol 8 | 0:5.15.0-323.211.3.3.el9uek | [bpftool 0:5.15.0-323.211.3.3.el9uek](https://patchblox.com/security/data/fix/linux/ol-8-bpftool-0-5.15.0-323.211.3.3.el9uek.md) | Aug 11, 2026 | | Linux | bpftool ol 9 | 0:5.15.0-323.211.3.3.el9uek | [bpftool 0:5.15.0-323.211.3.3.el9uek](https://patchblox.com/security/data/fix/linux/ol-9-bpftool-0-5.15.0-323.211.3.3.el9uek.md) | Aug 11, 2026 | | Linux | kernel-64kb sles 15.7 | 6.4.0-150700.53.81.1 | [SUSE-SU-2026:4254-1](https://patchblox.com/security/data/fix/linux/suse-su-2026-4254-1.md) | Oct 7, 2026 | | Linux | kernel-azure sles 15.7 | 6.4.0-150700.53.81.1 | [SUSE-SU-2026:4254-1](https://patchblox.com/security/data/fix/linux/suse-su-2026-4254-1.md) | Oct 7, 2026 | | Linux | kernel-default sles 15.7 | 6.4.0-150700.53.81.1 | [SUSE-SU-2026:4254-1](https://patchblox.com/security/data/fix/linux/suse-su-2026-4254-1.md) | Oct 7, 2026 | | Linux | kernel-default-base sles 15.7 | 6.4.0-150700.53.81.1.150700.17.45.1 | [SUSE-SU-2026:4254-1](https://patchblox.com/security/data/fix/linux/suse-su-2026-4254-1.md) | Oct 7, 2026 | | Linux | kernel-docs sles 15.7 | 6.4.0-150700.53.81.1 | [SUSE-SU-2026:4254-1](https://patchblox.com/security/data/fix/linux/suse-su-2026-4254-1.md) | Oct 7, 2026 | | Linux | kernel-livepatch-SLE15-SP7-RT_Update_20 sles 15.7 | 1-150700.1.3.1 | [SUSE-SU-2026:4120-1](https://patchblox.com/security/data/fix/linux/suse-su-2026-4120-1.md) | Sep 10, 2026 | | Linux | kernel-livepatch-SLE15-SP7_Update_21 sles 15.7 | 1-150700.15.3.1 | [SUSE-SU-2026:4254-1](https://patchblox.com/security/data/fix/linux/suse-su-2026-4254-1.md) | Oct 7, 2026 | | Linux | kernel-obs-build sles 15.7 | 6.4.0-150700.53.81.1 | [SUSE-SU-2026:4254-1](https://patchblox.com/security/data/fix/linux/suse-su-2026-4254-1.md) | Oct 7, 2026 | | Linux | kernel-source sles 15.7 | 6.4.0-150700.53.81.1 | [SUSE-SU-2026:4254-1](https://patchblox.com/security/data/fix/linux/suse-su-2026-4254-1.md) | Oct 7, 2026 | | Linux | kernel-syms sles 15.7 | 6.4.0-150700.53.81.1 | [SUSE-SU-2026:4254-1](https://patchblox.com/security/data/fix/linux/suse-su-2026-4254-1.md) | Oct 7, 2026 | | Linux | kernel-uek ol 8 | 0:5.15.0-323.211.3.3.el9uek | [kernel-uek 0:5.15.0-323.211.3.3.el9uek](https://patchblox.com/security/data/fix/linux/ol-8-kernel-uek-0-5.15.0-323.211.3.3.el9uek.md) | Aug 11, 2026 | | Linux | kernel-uek ol 9 | 0:5.15.0-323.211.3.3.el9uek | [kernel-uek 0:5.15.0-323.211.3.3.el9uek](https://patchblox.com/security/data/fix/linux/ol-9-kernel-uek-0-5.15.0-323.211.3.3.el9uek.md) | Aug 11, 2026 | | Linux | kernel-uek-container ol 8 | 0:5.15.0-323.211.3.3.el9uek | [kernel-uek-container 0:5.15.0-323.211.3.3.el9uek](https://patchblox.com/security/data/fix/linux/ol-8-kernel-uek-container-0-5.15.0-323.211.3.3.el9uek.md) | Aug 11, 2026 | | Linux | kernel-uek-container ol 9 | 0:5.15.0-323.211.3.3.el9uek | [kernel-uek-container 0:5.15.0-323.211.3.3.el9uek](https://patchblox.com/security/data/fix/linux/ol-9-kernel-uek-container-0-5.15.0-323.211.3.3.el9uek.md) | Aug 11, 2026 | | Linux | kernel-uek-container-debug ol 8 | 0:5.15.0-323.211.3.3.el9uek | [kernel-uek-container-debug 0:5.15.0-323.211.3.3.el9uek](https://patchblox.com/security/data/fix/linux/ol-8-kernel-uek-container-debug-0-5.15.0-323.211.3.3.el9uek.md) | Aug 11, 2026 | | Linux | kernel-uek-container-debug ol 9 | 0:5.15.0-323.211.3.3.el9uek | [kernel-uek-container-debug 0:5.15.0-323.211.3.3.el9uek](https://patchblox.com/security/data/fix/linux/ol-9-kernel-uek-container-debug-0-5.15.0-323.211.3.3.el9uek.md) | Aug 11, 2026 | | Linux | kernel-uek-core ol 8 | 0:5.15.0-323.211.3.3.el9uek | [kernel-uek-core 0:5.15.0-323.211.3.3.el9uek](https://patchblox.com/security/data/fix/linux/ol-8-kernel-uek-core-0-5.15.0-323.211.3.3.el9uek.md) | Aug 11, 2026 | | Linux | kernel-uek-core ol 9 | 0:5.15.0-323.211.3.3.el9uek | [kernel-uek-core 0:5.15.0-323.211.3.3.el9uek](https://patchblox.com/security/data/fix/linux/ol-9-kernel-uek-core-0-5.15.0-323.211.3.3.el9uek.md) | Aug 11, 2026 | | Linux | kernel-uek-debug ol 8 | 0:5.15.0-323.211.3.3.el9uek | [kernel-uek-debug 0:5.15.0-323.211.3.3.el9uek](https://patchblox.com/security/data/fix/linux/ol-8-kernel-uek-debug-0-5.15.0-323.211.3.3.el9uek.md) | Aug 11, 2026 | | Linux | kernel-uek-debug ol 9 | 0:5.15.0-323.211.3.3.el9uek | [kernel-uek-debug 0:5.15.0-323.211.3.3.el9uek](https://patchblox.com/security/data/fix/linux/ol-9-kernel-uek-debug-0-5.15.0-323.211.3.3.el9uek.md) | Aug 11, 2026 | | Linux | kernel-uek-debug-core ol 8 | 0:5.15.0-323.211.3.3.el9uek | [kernel-uek-debug-core 0:5.15.0-323.211.3.3.el9uek](https://patchblox.com/security/data/fix/linux/ol-8-kernel-uek-debug-core-0-5.15.0-323.211.3.3.el9uek.md) | Aug 11, 2026 | | Linux | kernel-uek-debug-core ol 9 | 0:5.15.0-323.211.3.3.el9uek | [kernel-uek-debug-core 0:5.15.0-323.211.3.3.el9uek](https://patchblox.com/security/data/fix/linux/ol-9-kernel-uek-debug-core-0-5.15.0-323.211.3.3.el9uek.md) | Aug 11, 2026 | | Linux | kernel-uek-debug-devel ol 8 | 0:5.15.0-323.211.3.3.el9uek | [kernel-uek-debug-devel 0:5.15.0-323.211.3.3.el9uek](https://patchblox.com/security/data/fix/linux/ol-8-kernel-uek-debug-devel-0-5.15.0-323.211.3.3.el9uek.md) | Aug 11, 2026 | | Linux | kernel-uek-debug-devel ol 9 | 0:5.15.0-323.211.3.3.el9uek | [kernel-uek-debug-devel 0:5.15.0-323.211.3.3.el9uek](https://patchblox.com/security/data/fix/linux/ol-9-kernel-uek-debug-devel-0-5.15.0-323.211.3.3.el9uek.md) | Aug 11, 2026 | | Linux | kernel-uek-debug-modules ol 8 | 0:5.15.0-323.211.3.3.el9uek | [kernel-uek-debug-modules 0:5.15.0-323.211.3.3.el9uek](https://patchblox.com/security/data/fix/linux/ol-8-kernel-uek-debug-modules-0-5.15.0-323.211.3.3.el9uek.md) | Aug 11, 2026 | | Linux | kernel-uek-debug-modules ol 9 | 0:5.15.0-323.211.3.3.el9uek | [kernel-uek-debug-modules 0:5.15.0-323.211.3.3.el9uek](https://patchblox.com/security/data/fix/linux/ol-9-kernel-uek-debug-modules-0-5.15.0-323.211.3.3.el9uek.md) | Aug 11, 2026 | | Linux | kernel-uek-debug-modules-extra ol 8 | 0:5.15.0-323.211.3.3.el9uek | [kernel-uek-debug-modules-extra 0:5.15.0-323.211.3.3.el9uek](https://patchblox.com/security/data/fix/linux/ol-8-kernel-uek-debug-modules-extra-0-5.15.0-323.211.3.3.el9uek.md) | Aug 11, 2026 | | Linux | kernel-uek-debug-modules-extra ol 9 | 0:5.15.0-323.211.3.3.el9uek | [kernel-uek-debug-modules-extra 0:5.15.0-323.211.3.3.el9uek](https://patchblox.com/security/data/fix/linux/ol-9-kernel-uek-debug-modules-extra-0-5.15.0-323.211.3.3.el9uek.md) | Aug 11, 2026 | | Linux | kernel-uek-devel ol 8 | 0:5.15.0-323.211.3.3.el9uek | [kernel-uek-devel 0:5.15.0-323.211.3.3.el9uek](https://patchblox.com/security/data/fix/linux/ol-8-kernel-uek-devel-0-5.15.0-323.211.3.3.el9uek.md) | Aug 11, 2026 | | Linux | kernel-uek-devel ol 9 | 0:5.15.0-323.211.3.3.el9uek | [kernel-uek-devel 0:5.15.0-323.211.3.3.el9uek](https://patchblox.com/security/data/fix/linux/ol-9-kernel-uek-devel-0-5.15.0-323.211.3.3.el9uek.md) | Aug 11, 2026 | | Linux | kernel-uek-doc ol 8 | 0:5.15.0-323.211.3.3.el9uek | [kernel-uek-doc 0:5.15.0-323.211.3.3.el9uek](https://patchblox.com/security/data/fix/linux/ol-8-kernel-uek-doc-0-5.15.0-323.211.3.3.el9uek.md) | Aug 11, 2026 | | Linux | kernel-uek-doc ol 9 | 0:5.15.0-323.211.3.3.el9uek | [kernel-uek-doc 0:5.15.0-323.211.3.3.el9uek](https://patchblox.com/security/data/fix/linux/ol-9-kernel-uek-doc-0-5.15.0-323.211.3.3.el9uek.md) | Aug 11, 2026 | | Linux | kernel-uek-modules ol 8 | 0:5.15.0-323.211.3.3.el9uek | [kernel-uek-modules 0:5.15.0-323.211.3.3.el9uek](https://patchblox.com/security/data/fix/linux/ol-8-kernel-uek-modules-0-5.15.0-323.211.3.3.el9uek.md) | Aug 11, 2026 | | Linux | kernel-uek-modules ol 9 | 0:5.15.0-323.211.3.3.el9uek | [kernel-uek-modules 0:5.15.0-323.211.3.3.el9uek](https://patchblox.com/security/data/fix/linux/ol-9-kernel-uek-modules-0-5.15.0-323.211.3.3.el9uek.md) | Aug 11, 2026 | | Linux | kernel-uek-modules-extra ol 8 | 0:5.15.0-323.211.3.3.el9uek | [kernel-uek-modules-extra 0:5.15.0-323.211.3.3.el9uek](https://patchblox.com/security/data/fix/linux/ol-8-kernel-uek-modules-extra-0-5.15.0-323.211.3.3.el9uek.md) | Aug 11, 2026 | | Linux | kernel-uek-modules-extra ol 9 | 0:5.15.0-323.211.3.3.el9uek | [kernel-uek-modules-extra 0:5.15.0-323.211.3.3.el9uek](https://patchblox.com/security/data/fix/linux/ol-9-kernel-uek-modules-extra-0-5.15.0-323.211.3.3.el9uek.md) | Aug 11, 2026 | | Linux | kernel-uek64k ol 8 | 0:5.15.0-323.211.3.3.el9uek | [kernel-uek64k 0:5.15.0-323.211.3.3.el9uek](https://patchblox.com/security/data/fix/linux/ol-8-kernel-uek64k-0-5.15.0-323.211.3.3.el9uek.md) | Aug 11, 2026 | | Linux | kernel-uek64k ol 9 | 0:5.15.0-323.211.3.3.el9uek | [kernel-uek64k 0:5.15.0-323.211.3.3.el9uek](https://patchblox.com/security/data/fix/linux/ol-9-kernel-uek64k-0-5.15.0-323.211.3.3.el9uek.md) | Aug 11, 2026 | | Linux | kernel-uek64k-core ol 8 | 0:5.15.0-323.211.3.3.el9uek | [kernel-uek64k-core 0:5.15.0-323.211.3.3.el9uek](https://patchblox.com/security/data/fix/linux/ol-8-kernel-uek64k-core-0-5.15.0-323.211.3.3.el9uek.md) | Aug 11, 2026 | | Linux | kernel-uek64k-core ol 9 | 0:5.15.0-323.211.3.3.el9uek | [kernel-uek64k-core 0:5.15.0-323.211.3.3.el9uek](https://patchblox.com/security/data/fix/linux/ol-9-kernel-uek64k-core-0-5.15.0-323.211.3.3.el9uek.md) | Aug 11, 2026 | | Linux | kernel-uek64k-devel ol 8 | 0:5.15.0-323.211.3.3.el9uek | [kernel-uek64k-devel 0:5.15.0-323.211.3.3.el9uek](https://patchblox.com/security/data/fix/linux/ol-8-kernel-uek64k-devel-0-5.15.0-323.211.3.3.el9uek.md) | Aug 11, 2026 | | Linux | kernel-uek64k-devel ol 9 | 0:5.15.0-323.211.3.3.el9uek | [kernel-uek64k-devel 0:5.15.0-323.211.3.3.el9uek](https://patchblox.com/security/data/fix/linux/ol-9-kernel-uek64k-devel-0-5.15.0-323.211.3.3.el9uek.md) | Aug 11, 2026 | | Linux | kernel-uek64k-modules ol 8 | 0:5.15.0-323.211.3.3.el9uek | [kernel-uek64k-modules 0:5.15.0-323.211.3.3.el9uek](https://patchblox.com/security/data/fix/linux/ol-8-kernel-uek64k-modules-0-5.15.0-323.211.3.3.el9uek.md) | Aug 11, 2026 | | Linux | kernel-uek64k-modules ol 9 | 0:5.15.0-323.211.3.3.el9uek | [kernel-uek64k-modules 0:5.15.0-323.211.3.3.el9uek](https://patchblox.com/security/data/fix/linux/ol-9-kernel-uek64k-modules-0-5.15.0-323.211.3.3.el9uek.md) | Aug 11, 2026 | | Linux | kernel-uek64k-modules-extra ol 8 | 0:5.15.0-323.211.3.3.el9uek | [kernel-uek64k-modules-extra 0:5.15.0-323.211.3.3.el9uek](https://patchblox.com/security/data/fix/linux/ol-8-kernel-uek64k-modules-extra-0-5.15.0-323.211.3.3.el9uek.md) | Aug 11, 2026 | | Linux | kernel-uek64k-modules-extra ol 9 | 0:5.15.0-323.211.3.3.el9uek | [kernel-uek64k-modules-extra 0:5.15.0-323.211.3.3.el9uek](https://patchblox.com/security/data/fix/linux/ol-9-kernel-uek64k-modules-extra-0-5.15.0-323.211.3.3.el9uek.md) | Aug 11, 2026 | | Linux | kernel-zfcpdump sles 15.7 | 6.4.0-150700.53.81.1 | [SUSE-SU-2026:4254-1](https://patchblox.com/security/data/fix/linux/suse-su-2026-4254-1.md) | Oct 7, 2026 | | Linux | linux Debian 12.15 (bookworm) | 6.1.176-1 | [DEBIAN-CVE-2026-64218](https://patchblox.com/security/data/fix/linux/debian-cve-2026-64218.md) | Jul 25, 2026 | | Linux | linux Debian 13.5 (trixie) | 6.12.94-1 | [DEBIAN-CVE-2026-64218](https://patchblox.com/security/data/fix/linux/debian-cve-2026-64218.md) | Jul 25, 2026 | | Linux | linux Debian 14 | 7.0.12-1 | [DEBIAN-CVE-2026-64218](https://patchblox.com/security/data/fix/linux/debian-cve-2026-64218.md) | Jul 25, 2026 | --- Data as of 2026-11-08T13:06:02Z UTC. 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