CVE-2026-72229

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The netdev registration will be aborted because of this veto.\n\nThe register_netdevice() call will try to clean up the net_device using\nunregister_netdevice_queue() - which only uses the .priv_destructor to\nfree private resources. In this situation, .dellink will not be called.\n\nThe cleanup of the untagged batadv_meshif_vlan must thefore be done in the\ndestructor to avoid a leak of this object."}], "affected": [{"product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["net/batman-adv/main.c", "net/batman-adv/mesh-interface.c", "net/batman-adv/mesh-interface.h"], "versions": [{"version": "5d2c05b213377694a2aa8ce1ed9b23f7c39b0569", "lessThan": "86e32dfb6a6fe29898f4a562b7b6e38e480bba4d", "status": "affected", "versionType": "git"}, {"version": "5d2c05b213377694a2aa8ce1ed9b23f7c39b0569", "lessThan": "06ae245168268b705a204f93c318b30107d10e92", "status": "affected", "versionType": "git"}, {"version": "5d2c05b213377694a2aa8ce1ed9b23f7c39b0569", "lessThan": "dbca15fcbeed5276af440a53aed3901590fa7fc9", "status": "affected", "versionType": "git"}, {"version": "5d2c05b213377694a2aa8ce1ed9b23f7c39b0569", "lessThan": 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But in\nthis process, another receiver of this notification can veto the\nregistration. The netdev registration will be aborted because of this veto.\n\nThe register_netdevice() call will try to clean up the net_device using\nunregister_netdevice_queue() - which only uses the .priv_destructor to\nfree private resources. In this situation, .dellink will not be called.\n\nThe cleanup of the untagged batadv_meshif_vlan must thefore be done in the\ndestructor to avoid a leak of this object."}], "id": "CVE-2026-72229", "lastModified": "2026-11-06T17:19:40.593", "metrics": {"ssvcV203": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "ssvcData": {"id": "CVE-2026-72229", "options": [{"exploitation": "none"}, {"automatable": "no"}, {"technicalImpact": "partial"}], "role": "CISA Coordinator", "timestamp": "2026-11-06T16:53:08.171910Z", "version": "2.0.3"}}]}, "published": "2026-08-15T06:21:49.750", "references": [{"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/06ae245168268b705a204f93c318b30107d10e92"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/5a82c558098889cc8bfff85cc62f563833205d91"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/8669a550c752d86baebc5fdc83b8ff35c4372c0e"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/86e32dfb6a6fe29898f4a562b7b6e38e480bba4d"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/c945f6007e7851e74706c72f98763023699bcd97"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/dbca15fcbeed5276af440a53aed3901590fa7fc9"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/f15ca6250591cfe78408114a54eaa8d58da51bfa"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/f2423da55976ea249f73029e468aefda4b94acba"}], "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "vulnStatus": "Received"}

{"bugzilla": {"description": "kernel: batman-adv: clean untagged VLAN on netdev registration failure", "id": "2516647", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2516647"}, "csaw": false, "cvss3": {"cvss3_base_score": "5.5", "cvss3_scoring_vector": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H", "status": "draft"}, "cwe": "CWE-772", "details": ["A flaw was found in the `batman-adv` component of the Linux kernel. When a mesh interface is registered, an untagged VLAN object is created. If the network device (netdev) registration fails due to a veto, the cleanup process does not properly free this object. This can lead to a memory leak, potentially impacting system stability or performance over time."], "name": "CVE-2026-72229", "package_state": [{"cpe": "cpe:/o:redhat:enterprise_linux:10", "fix_state": "Not affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 10"}, {"cpe": "cpe:/o:redhat:enterprise_linux:6", "fix_state": "Not affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 6"}, {"cpe": "cpe:/o:redhat:enterprise_linux:7", "fix_state": "Not affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 7"}, {"cpe": "cpe:/o:redhat:enterprise_linux:7", "fix_state": "Not affected", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 7"}, {"cpe": "cpe:/o:redhat:enterprise_linux:8", "fix_state": "Not affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:8", "fix_state": "Not affected", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Not affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 9"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Not affected", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 9"}], "public_date": "2026-08-15T00:00:00Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2026-72229\nhttps://nvd.nist.gov/vuln/detail/CVE-2026-72229\nhttps://lore.kernel.org/linux-cve-announce/2026081549-CVE-2026-72229-232f@gregkh/T"], "threat_severity": "Moderate"}

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