CVE-2026-52926

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This leaves stale\ngateway state behind across cleanup and can break a later mesh recreation.\n\nClear bat_priv->gw.curr_gw before walking the gateway list so the selected\ngateway reference is dropped as part of teardown."}], "affected": [{"product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["net/batman-adv/gateway_client.c"], "versions": [{"version": "2265c141086474bbae55a5bb3afa1ebb78ccaa7c", "lessThan": "a3f3f1ec8aad84c5dd386c430b9c61cddd85b18f", "status": "affected", "versionType": "git"}, {"version": "2265c141086474bbae55a5bb3afa1ebb78ccaa7c", "lessThan": "e2ec4c712d19141ca7bf7fbbb1d842f73abaa186", "status": "affected", "versionType": "git"}, {"version": "2265c141086474bbae55a5bb3afa1ebb78ccaa7c", "lessThan": "9a1a8ed4facfe843bde6fdfcf7af0e9923eb2e17", "status": "affected", "versionType": "git"}, {"version": "2265c141086474bbae55a5bb3afa1ebb78ccaa7c", "lessThan": "6de089b545db013433cf934bb4e4433dec2dd65f", "status": "affected", "versionType": "git"}, {"version": "2265c141086474bbae55a5bb3afa1ebb78ccaa7c", "lessThan": "30bda3ef4b0cac777f1a7c314cd08b8ff6437365", "status": "affected", "versionType": "git"}, {"version": "2265c141086474bbae55a5bb3afa1ebb78ccaa7c", "lessThan": "ae7aeb0ce3c0ebbe357ed525779acac197a18086", "status": "affected", "versionType": "git"}, {"version": "2265c141086474bbae55a5bb3afa1ebb78ccaa7c", "lessThan": "17e3a441111cd1a530cd6ee69a22f3161d80d810", "status": "affected", "versionType": "git"}, {"version": "2265c141086474bbae55a5bb3afa1ebb78ccaa7c", "lessThan": "a340a51ed801eab7bb454150c226323b865263cc", "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/gateway_client.c"], "versions": [{"version": "3.1", "status": "affected"}, {"version": "0", "lessThan": "3.1", "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": "3.1", "versionEndExcluding": "5.10.258"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "3.1", "versionEndExcluding": "5.15.209"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "3.1", "versionEndExcluding": "6.1.175"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "3.1", "versionEndExcluding": "6.6.142"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "3.1", "versionEndExcluding": "6.12.92"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "3.1", "versionEndExcluding": "6.18.34"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "3.1", "versionEndExcluding": "7.0.11"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "3.1", "versionEndExcluding": "7.1"}]}]}], "references": [{"url": "https://git.kernel.org/stable/c/a3f3f1ec8aad84c5dd386c430b9c61cddd85b18f"}, {"url": "https://git.kernel.org/stable/c/e2ec4c712d19141ca7bf7fbbb1d842f73abaa186"}, {"url": "https://git.kernel.org/stable/c/9a1a8ed4facfe843bde6fdfcf7af0e9923eb2e17"}, {"url": "https://git.kernel.org/stable/c/6de089b545db013433cf934bb4e4433dec2dd65f"}, {"url": "https://git.kernel.org/stable/c/30bda3ef4b0cac777f1a7c314cd08b8ff6437365"}, {"url": "https://git.kernel.org/stable/c/ae7aeb0ce3c0ebbe357ed525779acac197a18086"}, {"url": "https://git.kernel.org/stable/c/17e3a441111cd1a530cd6ee69a22f3161d80d810"}, {"url": "https://git.kernel.org/stable/c/a340a51ed801eab7bb454150c226323b865263cc"}], "title": "batman-adv: clear current gateway during teardown", "x_generator": {"engine": "bippy-1.2.0"}}}}

{}

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following vulnerability has been resolved:\n\nbatman-adv: clear current gateway during teardown\n\nbatadv_gw_node_free() removes the gateway list entries during mesh teardown,\nbut it does not clear the currently selected gateway. This leaves stale\ngateway state behind across cleanup and can break a later mesh recreation.\n\nClear bat_priv->gw.curr_gw before walking the gateway list so the selected\ngateway reference is dropped as part of teardown."}], "id": "CVE-2026-52926", "lastModified": "2026-07-08T15:28:58.480", "metrics": {"cvssMetricV31": [{"cvssData": {"attackComplexity": "LOW", "attackVector": "LOCAL", "availabilityImpact": "HIGH", "baseScore": 5.5, "baseSeverity": "MEDIUM", "confidentialityImpact": "NONE", "integrityImpact": "NONE", "privilegesRequired": "LOW", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H", "version": "3.1"}, "exploitabilityScore": 1.8, "impactScore": 3.6, "source": "nvd@nist.gov", "type": "Primary"}]}, "published": "2026-06-24T08:16:22.697", "references": [{"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/17e3a441111cd1a530cd6ee69a22f3161d80d810"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/30bda3ef4b0cac777f1a7c314cd08b8ff6437365"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/6de089b545db013433cf934bb4e4433dec2dd65f"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/9a1a8ed4facfe843bde6fdfcf7af0e9923eb2e17"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/a340a51ed801eab7bb454150c226323b865263cc"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/a3f3f1ec8aad84c5dd386c430b9c61cddd85b18f"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/ae7aeb0ce3c0ebbe357ed525779acac197a18086"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/e2ec4c712d19141ca7bf7fbbb1d842f73abaa186"}], "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "vulnStatus": "Analyzed", "weaknesses": [{"description": [{"lang": "en", "value": "NVD-CWE-noinfo"}], "source": "nvd@nist.gov", "type": "Primary"}]}

{"bugzilla": {"description": "kernel: batman-adv: clear current gateway during teardown", "id": "2492106", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2492106"}, "csaw": false, "cwe": "CWE-459", "details": ["A flaw was found in the Linux kernel's batman-adv module, which is responsible for managing mesh networks. When a mesh network is being shut down, the system fails to properly clear the active gateway information. This leaves outdated network configuration data, which can prevent the mesh network from being successfully re-established. The consequence is a disruption of network services, effectively a denial of service."], "name": "CVE-2026-52926", "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-2026-52926\nhttps://nvd.nist.gov/vuln/detail/CVE-2026-52926\nhttps://lore.kernel.org/linux-cve-announce/2026062431-CVE-2026-52926-00d4@gregkh/T"]}

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