CVE-2022-49622

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The bug is reached by configuring nf_tables rules over netlink and triggering them in a local network namespace; nftables/netfilter is scored as Local, not remotely exploitable by itself.\nAC:L - An attacker who can install rules fully controls enabling nftrace and a STOLEN path (e.g. synproxy/fwd that consume_skb), then triggers the UAF synchronously on a locally generated packet with no race or external conditions.\nPR:L - nfnetlink requires CAP_NET_ADMIN, but that capability is obtainable in an unprivileged user+network namespace (unshare -Urn), so privileges required are Low rather than High.\nUI:N - No victim action is needed; the attacker installs the rules and sends packets that hit the chain themselves.\nS:U - This is a standard in-kernel use-after-free enabling local privilege escalation within the same OS security authority, not a VM/IOMMU/sandbox boundary escape.\nC:H - Use-after-free of the skb allows reading freed slab memory (including via nft_trace_notify packet/header dumps to netlink), which per guidance is High confidentiality impact.\nI:H - A kernel skb UAF is heap-corruptible via spraying and can yield write/control-flow primitives, so integrity impact is High.\nA:H - Accessing the freed skb in the tracing path can cause kernel oops/panic or otherwise crash the system, so availability impact is High."}]}], "affected": [{"product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["include/net/netfilter/nf_tables.h", "net/netfilter/nf_tables_core.c", "net/netfilter/nf_tables_trace.c"], "versions": [{"version": "5efa0fc6d7f7930b18801f07cefae8eeacd6ac02", "lessThan": "348218a4601e93de4d1e9fab29837cf656e4bf99", "status": "affected", "versionType": "git"}, {"version": "5efa0fc6d7f7930b18801f07cefae8eeacd6ac02", "lessThan": "453a67af8bd77463b33cb0336dd7f2341e332d29", "status": "affected", "versionType": "git"}, {"version": "5efa0fc6d7f7930b18801f07cefae8eeacd6ac02", "lessThan": "0016d5d46d7440729a3132f61a8da3bf7f84e2ba", "status": "affected", "versionType": "git"}, {"version": "5efa0fc6d7f7930b18801f07cefae8eeacd6ac02", "lessThan": "e34b9ed96ce3b06c79bf884009b16961ca478f87", "status": "affected", "versionType": "git"}]}, {"product": "Linux", "vendor": "Linux", "defaultStatus": "affected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["include/net/netfilter/nf_tables.h", "net/netfilter/nf_tables_core.c", "net/netfilter/nf_tables_trace.c"], "versions": [{"version": "4.10", "status": "affected"}, {"version": "0", "lessThan": "4.10", "status": "unaffected", "versionType": "semver"}, {"version": "5.10.273", "lessThanOrEqual": "5.10.*", "status": "unaffected", "versionType": "semver"}, {"version": "5.15.224", "lessThanOrEqual": "5.15.*", "status": "unaffected", "versionType": "semver"}, {"version": "5.18.13", "lessThanOrEqual": "5.18.*", "status": "unaffected", "versionType": "semver"}, {"version": "5.19", "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": "4.10", "versionEndExcluding": "5.10.273"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.10", "versionEndExcluding": "5.15.224"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.10", "versionEndExcluding": "5.18.13"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.10", "versionEndExcluding": "5.19"}]}]}], "references": [{"url": "https://git.kernel.org/stable/c/348218a4601e93de4d1e9fab29837cf656e4bf99"}, {"url": "https://git.kernel.org/stable/c/453a67af8bd77463b33cb0336dd7f2341e332d29"}, {"url": "https://git.kernel.org/stable/c/0016d5d46d7440729a3132f61a8da3bf7f84e2ba"}, {"url": "https://git.kernel.org/stable/c/e34b9ed96ce3b06c79bf884009b16961ca478f87"}], "title": "netfilter: nf_tables: avoid skb access on nf_stolen", "x_generator": {"engine": "bippy-1.2.0"}}, "adp": [{"metrics": [{"cvssV3_1": {"scope": "UNCHANGED", "version": "3.1", "baseScore": 7.8, "attackVector": "LOCAL", "baseSeverity": "HIGH", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H", "integrityImpact": "HIGH", "userInteraction": "NONE", "attackComplexity": "LOW", "availabilityImpact": "HIGH", "privilegesRequired": "LOW", "confidentialityImpact": "HIGH"}}, {"other": {"type": "ssvc", "content": {"id": "CVE-2022-49622", "role": "CISA Coordinator", "options": [{"Exploitation": "none"}, {"Automatable": "no"}, {"Technical Impact": "total"}], "version": "2.0.3", "timestamp": "2025-02-27T18:15:30.357017Z"}}}], "problemTypes": [{"descriptions": [{"lang": "en", "type": "CWE", "cweId": "CWE-416", "description": "CWE-416 Use After Free"}]}], "title": "CISA ADP Vulnrichment", "providerMetadata": {"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "shortName": "CISA-ADP", "dateUpdated": "2025-02-27T18:22:31.702Z"}}]}}

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{"affected": [{"affectedData": [{"defaultStatus": "unaffected", "product": "Linux", "programFiles": ["include/net/netfilter/nf_tables.h", "net/netfilter/nf_tables_core.c", "net/netfilter/nf_tables_trace.c"], "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "versions": [{"lessThan": "348218a4601e93de4d1e9fab29837cf656e4bf99", "status": "affected", "version": "5efa0fc6d7f7930b18801f07cefae8eeacd6ac02", "versionType": "git"}, {"lessThan": "453a67af8bd77463b33cb0336dd7f2341e332d29", "status": "affected", "version": "5efa0fc6d7f7930b18801f07cefae8eeacd6ac02", "versionType": "git"}, {"lessThan": "0016d5d46d7440729a3132f61a8da3bf7f84e2ba", "status": "affected", "version": "5efa0fc6d7f7930b18801f07cefae8eeacd6ac02", "versionType": "git"}, {"lessThan": "e34b9ed96ce3b06c79bf884009b16961ca478f87", "status": "affected", "version": "5efa0fc6d7f7930b18801f07cefae8eeacd6ac02", "versionType": "git"}]}, {"defaultStatus": "affected", "product": "Linux", "programFiles": ["include/net/netfilter/nf_tables.h", "net/netfilter/nf_tables_core.c", "net/netfilter/nf_tables_trace.c"], "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "versions": [{"status": "affected", "version": "4.10"}, {"lessThan": "4.10", "status": "unaffected", "version": "0", "versionType": "semver"}, {"lessThanOrEqual": "5.10.*", "status": "unaffected", "version": "5.10.273", "versionType": "semver"}, {"lessThanOrEqual": "5.15.*", "status": "unaffected", "version": "5.15.224", "versionType": "semver"}, {"lessThanOrEqual": "5.18.*", "status": "unaffected", "version": "5.18.13", "versionType": "semver"}, {"lessThanOrEqual": "*", "status": "unaffected", "version": "5.19", "versionType": "original_commit_for_fix"}]}], "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}], "configurations": [{"nodes": [{"cpeMatch": [{"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "matchCriteriaId": "5E7A257D-D28B-46EB-BC21-AD8C60095E96", "versionEndExcluding": "5.18.13", "vulnerable": true}, {"criteria": "cpe:2.3:o:linux:linux_kernel:5.19:rc1:*:*:*:*:*:*", "matchCriteriaId": "A8C30C2D-F82D-4D37-AB48-D76ABFBD5377", "vulnerable": true}, {"criteria": "cpe:2.3:o:linux:linux_kernel:5.19:rc2:*:*:*:*:*:*", "matchCriteriaId": "BF8547FC-C849-4F1B-804B-A93AE2F04A92", "vulnerable": true}, {"criteria": "cpe:2.3:o:linux:linux_kernel:5.19:rc3:*:*:*:*:*:*", "matchCriteriaId": "F3068028-F453-4A1C-B80F-3F5609ACEF60", "vulnerable": true}, {"criteria": "cpe:2.3:o:linux:linux_kernel:5.19:rc4:*:*:*:*:*:*", "matchCriteriaId": "2E9C0DB0-D349-489F-A3D6-B77214E93A8A", "vulnerable": true}], "negate": false, "operator": "OR"}]}], "cveTags": [], "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nnetfilter: nf_tables: avoid skb access on nf_stolen\n\nWhen verdict is NF_STOLEN, the skb might have been freed.\n\nWhen tracing is enabled, this can result in a use-after-free:\n1. access to skb->nf_trace\n2. access to skb->mark\n3. computation of trace id\n4. dump of packet payload\n\nTo avoid 1, keep a cached copy of skb->nf_trace in the\ntrace state struct.\nRefresh this copy whenever verdict is != STOLEN.\n\nAvoid 2 by skipping skb->mark access if verdict is STOLEN.\n\n3 is avoided by precomputing the trace id.\n\nOnly dump the packet when verdict is not \"STOLEN\"."}, {"lang": "es", "value": "En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: netfilter: nf_tables: evitar el acceso a skb en nf_stolen Cuando el veredicto es NF_STOLEN, es posible que se haya liberado el skb. Cuando el rastreo est\u00e1 habilitado, esto puede dar como resultado un use-after-free: 1. acceso a skb->nf_trace 2. acceso a skb->mark 3. c\u00e1lculo del identificador de rastreo 4. volcado de el payload del paquete Para evitar 1, mantenga una copia en cach\u00e9 de skb->nf_trace en la estructura de estado de rastreo. Actualice esta copia siempre que el veredicto sea != STOLEN. Evite 2 omitiendo el acceso a skb->mark si el veredicto es STOLEN. 3 se evita precalculando el identificador de rastreo. Solo vuelque el paquete cuando el veredicto no sea \"STOLEN\"."}], "id": "CVE-2022-49622", "lastModified": "2026-10-30T13:17:13.987", "metrics": {"cvssMetricV31": [{"cvssData": {"attackComplexity": "LOW", "attackVector": "LOCAL", "availabilityImpact": "HIGH", "baseScore": 7.8, "baseSeverity": "HIGH", "confidentialityImpact": "HIGH", "integrityImpact": "HIGH", "privilegesRequired": "LOW", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H", "version": "3.1"}, "exploitabilityScore": 1.8, "impactScore": 5.9, "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "type": "Secondary"}, {"cvssData": {"attackComplexity": "LOW", "attackVector": "LOCAL", "availabilityImpact": "HIGH", "baseScore": 7.8, "baseSeverity": "HIGH", "confidentialityImpact": "HIGH", "integrityImpact": "HIGH", "privilegesRequired": "LOW", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H", "version": "3.1"}, "exploitabilityScore": 1.8, "impactScore": 5.9, "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "type": "Secondary"}], "ssvcV203": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "ssvcData": {"id": "CVE-2022-49622", "options": [{"exploitation": "none"}, {"automatable": "no"}, {"technicalImpact": "total"}], "role": "CISA Coordinator", "timestamp": "2025-02-27T18:15:30.357017Z", "version": "2.0.3"}}]}, "published": "2025-02-26T07:01:37.580", "references": [{"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/0016d5d46d7440729a3132f61a8da3bf7f84e2ba"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/348218a4601e93de4d1e9fab29837cf656e4bf99"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/453a67af8bd77463b33cb0336dd7f2341e332d29"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/e34b9ed96ce3b06c79bf884009b16961ca478f87"}], "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "vulnStatus": "Modified", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-416"}], "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "type": "Secondary"}]}

{"bugzilla": {"description": "kernel: netfilter: nf_tables: avoid skb access on nf_stolen", "id": "2348363", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2348363"}, "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"}, "details": ["In the Linux kernel, the following vulnerability has been resolved:\nnetfilter: nf_tables: avoid skb access on nf_stolen\nWhen verdict is NF_STOLEN, the skb might have been freed.\nWhen tracing is enabled, this can result in a use-after-free:\n1. access to skb->nf_trace\n2. access to skb->mark\n3. computation of trace id\n4. dump of packet payload\nTo avoid 1, keep a cached copy of skb->nf_trace in the\ntrace state struct.\nRefresh this copy whenever verdict is != STOLEN.\nAvoid 2 by skipping skb->mark access if verdict is STOLEN.\n3 is avoided by precomputing the trace id.\nOnly dump the packet when verdict is not \"STOLEN\"."], "name": "CVE-2022-49622", "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": "Out of support scope", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 7"}, {"cpe": "cpe:/o:redhat:enterprise_linux:7", "fix_state": "Out of support scope", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 7"}, {"cpe": "cpe:/o:redhat:enterprise_linux:8", "fix_state": "Out of support scope", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:8", "fix_state": "Out of support scope", "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": "2025-02-26T00:00:00Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2022-49622\nhttps://nvd.nist.gov/vuln/detail/CVE-2022-49622\nhttps://lore.kernel.org/linux-cve-announce/2025022615-CVE-2022-49622-bd19@gregkh/T"], "threat_severity": "Moderate"}

{}