{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-52919", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2026-06-09T07:44:35.367Z", "datePublished": "2026-06-24T07:14:15.201Z", "dateUpdated": "2026-06-24T07:14:15.201Z"}, "containers": {"cna": {"providerMetadata": {"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-06-24T07:14:15.201Z"}, "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nbatman-adv: fix tp_meter counter underflow during shutdown\n\nbatadv_tp_sender_shutdown() unconditionally decrements the \"sending\"\natomic counter. If multiple paths (e.g. timeout, user cancel, and\nnormal finish) call this function, the counter can underflow to -1.\n\nSince the sender logic treats any non-zero value as \"still sending\",\na negative value causes the sender kthread to loop indefinitely.\nThis leads to a use-after-free when the interface is removed while\nthe zombie thread is still active.\n\nFix this by using atomic_xchg() to ensure the counter only transitions\nfrom 1 to 0 once.\n\n[sven: added missing change in batadv_tp_send]"}], "affected": [{"product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["net/batman-adv/tp_meter.c"], "versions": [{"version": "33a3bb4a3345bb511f9c69c913da95d4693e2a4e", "lessThan": "e75e2ab463b5b34df6b98f94d740aff327ce9f6b", "status": "affected", "versionType": "git"}, {"version": "33a3bb4a3345bb511f9c69c913da95d4693e2a4e", "lessThan": "abae88fa254f2981d39ac003a7b302528a22af64", "status": "affected", "versionType": "git"}, {"version": "33a3bb4a3345bb511f9c69c913da95d4693e2a4e", "lessThan": "c66d20a3ff095e3f000551d208ec2606616db15c", "status": "affected", "versionType": "git"}, {"version": "33a3bb4a3345bb511f9c69c913da95d4693e2a4e", "lessThan": "c1bac194733aabd731aafa6a01350c229e187dba", "status": "affected", "versionType": "git"}, {"version": "33a3bb4a3345bb511f9c69c913da95d4693e2a4e", "lessThan": "01cefc5923889e29dbb5f281c3d457714ceb9c00", "status": "affected", "versionType": "git"}, {"version": "33a3bb4a3345bb511f9c69c913da95d4693e2a4e", "lessThan": "90ae3eae06b7b8ab9f6250b9497c860915b4c17b", "status": "affected", "versionType": "git"}, {"version": "33a3bb4a3345bb511f9c69c913da95d4693e2a4e", "lessThan": "aeae11c5dad9cd0d50723890bdd866f8e6db2e7d", "status": "affected", "versionType": "git"}, {"version": "33a3bb4a3345bb511f9c69c913da95d4693e2a4e", "lessThan": "94f3b133168d1c49895e7cc6afbcf1cc0b354602", "status": "affected", "versionType": "git"}]}, {"product": "Linux", "vendor": "Linux", "defaultStatus": "affected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["net/batman-adv/tp_meter.c"], "versions": [{"version": "4.8", "status": "affected"}, {"version": "0", "lessThan": "4.8", "status": "unaffected", "versionType": "semver"}, {"version": "5.10.258", "lessThanOrEqual": "5.10.*", "status": "unaffected", "versionType": "semver"}, {"version": "5.15.209", "lessThanOrEqual": "5.15.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.1.175", "lessThanOrEqual": "6.1.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.6.142", "lessThanOrEqual": "6.6.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.12.92", "lessThanOrEqual": "6.12.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.18.34", "lessThanOrEqual": "6.18.*", "status": "unaffected", "versionType": "semver"}, {"version": "7.0.11", "lessThanOrEqual": "7.0.*", "status": "unaffected", "versionType": "semver"}, {"version": "7.1", "lessThanOrEqual": "*", "status": "unaffected", "versionType": "original_commit_for_fix"}]}], "cpeApplicability": [{"nodes": [{"operator": "OR", "negate": false, "cpeMatch": [{"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.8", "versionEndExcluding": "5.10.258"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.8", "versionEndExcluding": "5.15.209"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.8", "versionEndExcluding": "6.1.175"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.8", "versionEndExcluding": "6.6.142"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.8", "versionEndExcluding": "6.12.92"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.8", "versionEndExcluding": "6.18.34"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.8", "versionEndExcluding": "7.0.11"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.8", "versionEndExcluding": "7.1"}]}]}], "references": [{"url": "https://git.kernel.org/stable/c/e75e2ab463b5b34df6b98f94d740aff327ce9f6b"}, {"url": "https://git.kernel.org/stable/c/abae88fa254f2981d39ac003a7b302528a22af64"}, {"url": "https://git.kernel.org/stable/c/c66d20a3ff095e3f000551d208ec2606616db15c"}, {"url": "https://git.kernel.org/stable/c/c1bac194733aabd731aafa6a01350c229e187dba"}, {"url": "https://git.kernel.org/stable/c/01cefc5923889e29dbb5f281c3d457714ceb9c00"}, {"url": "https://git.kernel.org/stable/c/90ae3eae06b7b8ab9f6250b9497c860915b4c17b"}, {"url": "https://git.kernel.org/stable/c/aeae11c5dad9cd0d50723890bdd866f8e6db2e7d"}, {"url": "https://git.kernel.org/stable/c/94f3b133168d1c49895e7cc6afbcf1cc0b354602"}], "title": "batman-adv: fix tp_meter counter underflow during shutdown", "x_generator": {"engine": "bippy-1.2.0"}}}}

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{"bugzilla": {"description": "kernel: batman-adv: fix tp_meter counter underflow during shutdown", "id": "2492089", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2492089"}, "csaw": false, "cwe": "CWE-191", "details": ["A flaw was found in the `batman-adv` module of the Linux kernel. During the shutdown process of the `tp_meter` sender, an atomic counter can underflow due to multiple decrements. This can cause the sender kernel thread to loop indefinitely, leading to a use-after-free vulnerability if the associated network interface is removed. This issue could result in system instability or a denial of service."], "name": "CVE-2026-52919", "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": "2026-06-24T00:00:00Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2026-52919\nhttps://nvd.nist.gov/vuln/detail/CVE-2026-52919\nhttps://lore.kernel.org/linux-cve-announce/2026062430-CVE-2026-52919-f17e@gregkh/T"]}