CVE-2026-43382

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In this case,\nan rtnl_lock() would cause a deadlock.\n\nTo avoid this, rtnl_trylock() was used in this function to skip the\nretrieval of the ethtool information in case the RTNL lock was already\nheld.\n\nBut for cfg80211 interfaces, batadv_get_real_netdev() was called - which\nalso uses rtnl_lock(). The approach for __ethtool_get_link_ksettings() must\nalso be used instead and the lockless version __batadv_get_real_netdev()\nhas to be called."}], "affected": [{"product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["net/batman-adv/bat_v_elp.c", "net/batman-adv/hard-interface.c", "net/batman-adv/hard-interface.h"], "versions": [{"version": "a0019971f340ae02ba54cf1861f72da7e03e6b66", "lessThan": "4c3ae249431b4fcb315d7dfb4c3a13f9e443fd9b", "status": "affected", "versionType": "git"}, {"version": "3c0e0aecb78cb2a2ca1dc701982d08fedb088dc6", "lessThan": "192f40ad8a7dac58dae9199a065dbf7e6e67b75b", "status": "affected", "versionType": "git"}, {"version": "781a06fd265a8151f7601122d9c2e985663828ff", "lessThan": "fa7b4edfbabdf9235b0ab4bea297fc12b3bec9ca", "status": "affected", "versionType": "git"}, {"version": "a7aa2317285806640c844acd4cd2cd768e395264", "lessThan": 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"https://git.kernel.org/stable/c/cfc83a3c71517b59c1047db57da31e26a9dc2f33"}], "title": "batman-adv: Avoid double-rtnl_lock ELP metric worker", "x_generator": {"engine": "bippy-1.2.0"}}}}

{}

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vulnerability has been resolved:\n\nbatman-adv: Avoid double-rtnl_lock ELP metric worker\n\nbatadv_v_elp_get_throughput() might be called when the RTNL lock is already\nheld. This could be problematic when the work queue item is cancelled via\ncancel_delayed_work_sync() in batadv_v_elp_iface_disable(). In this case,\nan rtnl_lock() would cause a deadlock.\n\nTo avoid this, rtnl_trylock() was used in this function to skip the\nretrieval of the ethtool information in case the RTNL lock was already\nheld.\n\nBut for cfg80211 interfaces, batadv_get_real_netdev() was called - which\nalso uses rtnl_lock(). The approach for __ethtool_get_link_ksettings() must\nalso be used instead and the lockless version __batadv_get_real_netdev()\nhas to be called."}, {"lang": "es", "value": "En el kernel de Linux, la siguiente vulnerabilidad ha sido resuelta:\n\nbatman-adv: Evitar doble rtnl_lock en el trabajador de m\u00e9tricas ELP\n\nbatadv_v_elp_get_throughput() podr\u00eda ser llamada cuando el bloqueo RTNL ya est\u00e1 mantenido. Esto podr\u00eda ser problem\u00e1tico cuando el elemento de la cola de trabajo es cancelado a trav\u00e9s de cancel_delayed_work_sync() en batadv_v_elp_iface_disable(). En este caso, un rtnl_lock() causar\u00eda un interbloqueo.\n\nPara evitar esto, se us\u00f3 rtnl_trylock() en esta funci\u00f3n para omitir la recuperaci\u00f3n de la informaci\u00f3n de ethtool en caso de que el bloqueo RTNL ya estuviera mantenido.\n\nPero para las interfaces cfg80211, se llam\u00f3 a batadv_get_real_netdev() - que tambi\u00e9n usa rtnl_lock(). El enfoque para __ethtool_get_link_ksettings() tambi\u00e9n debe usarse en su lugar y la versi\u00f3n sin bloqueo __batadv_get_real_netdev() debe ser llamada."}], "id": "CVE-2026-43382", "lastModified": "2026-11-11T20:10:00.273", "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": "2026-05-08T15:16:49.463", "references": [{"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/192f40ad8a7dac58dae9199a065dbf7e6e67b75b"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/2ab9f2531d37775cd79228c1f5d80e6bd08d11d3"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/4c3ae249431b4fcb315d7dfb4c3a13f9e443fd9b"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/77808fe7d03ad0062840b95f431869a8b3d88b24"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/b7e5d8ddfdf1d6e9e0808d1adf7736a107372d77"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/cfc83a3c71517b59c1047db57da31e26a9dc2f33"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/f3ca45673dab0514a887231de6f3243a699d5bfd"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/fa7b4edfbabdf9235b0ab4bea297fc12b3bec9ca"}], "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "vulnStatus": "Analyzed", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-667"}], "source": "nvd@nist.gov", "type": "Primary"}]}

{"bugzilla": {"description": "kernel: batman-adv: Avoid double-rtnl_lock ELP metric worker", "id": "2468189", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2468189"}, "csaw": false, "cwe": "CWE-833", "details": ["A flaw was found in the batman-adv module of the Linux kernel. This vulnerability occurs when the `batadv_v_elp_get_throughput()` function attempts to acquire a network lock (RTNL lock) that is already held, particularly during the cancellation of a work queue item. This can lead to a deadlock, causing a Denial of Service (DoS) for the affected system."], "name": "CVE-2026-43382", "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": "2026-05-08T00:00:00Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2026-43382\nhttps://nvd.nist.gov/vuln/detail/CVE-2026-43382\nhttps://lore.kernel.org/linux-cve-announce/2026050833-CVE-2026-43382-d102@gregkh/T"]}

{"affected": [{"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[a0019971f340ae02ba54cf1861f72da7e03e6b66,4c3ae249431b4fcb315d7dfb4c3a13f9e443fd9b)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[3c0e0aecb78cb2a2ca1dc701982d08fedb088dc6,192f40ad8a7dac58dae9199a065dbf7e6e67b75b)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[781a06fd265a8151f7601122d9c2e985663828ff,fa7b4edfbabdf9235b0ab4bea297fc12b3bec9ca)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[a7aa2317285806640c844acd4cd2cd768e395264,f3ca45673dab0514a887231de6f3243a699d5bfd)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[0fdc3c166ac17b26014313fa2b93696354511b24,b7e5d8ddfdf1d6e9e0808d1adf7736a107372d77)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[8c8ecc98f5c65947b0070a24bac11e12e47cc65d,2ab9f2531d37775cd79228c1f5d80e6bd08d11d3)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[8c8ecc98f5c65947b0070a24bac11e12e47cc65d,77808fe7d03ad0062840b95f431869a8b3d88b24)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[8c8ecc98f5c65947b0070a24bac11e12e47cc65d,cfc83a3c71517b59c1047db57da31e26a9dc2f33)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "1c334629176c2d644befc31a20d4bf75542f7631"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "af264c2a9adc37f4bdf88ca7f3affa15d8c7de9e"}}], "enrichment": {"confidence": 99.0, "confidence_source": "inferred", "scores": [{"score": 99.0, "source": "inferred"}, {"score": 100.0, "source": "matching"}]}, "original": {"product": "Linux", "source": "cna", "vendor": "Linux"}, "product": "linux_kernel", "vendor": "linux"}, {"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "semver", "value": "6.14"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[0,6.14)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[5.10.253,5.11.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[5.15.203,5.16.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[6.1.167,6.2.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[6.6.130,6.7.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[6.12.78,6.13.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[6.18.19,6.19.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[6.19.9,6.20.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "generic", "value": "[7.0,*]"}}], "enrichment": {"confidence": 99.0, "confidence_source": "inferred", "scores": [{"score": 99.0, "source": "inferred"}, {"score": 100.0, "source": "matching"}]}, "original": {"product": "Linux", "source": "cna", "vendor": "Linux"}, "product": "linux_kernel", "vendor": "linux"}], "created": "2026-05-08T16:00:13.270477+00:00", "updated": "2026-05-26T19:00:15.783001+00:00", "vendors": ["linux", "linux$PRODUCT$linux_kernel"]}