CVE-2022-49997

{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2022-49997", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2025-06-18T10:57:27.387Z", "datePublished": "2025-06-18T11:00:57.072Z", "dateUpdated": "2026-08-05T08:57:05.467Z"}, "containers": {"cna": {"providerMetadata": {"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-08-05T08:57:05.467Z"}, "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nnet: lantiq_xrx200: restore buffer if memory allocation failed\n\nIn a situation where memory allocation fails, an invalid buffer address\nis stored. When this descriptor is used again, the system panics in the\nbuild_skb() function when accessing memory."}], "metrics": [{"cvssV3_1": {"version": "3.1", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H", "baseScore": 7.5, "baseSeverity": "HIGH"}, "scenarios": [{"lang": "en", "value": "AV:N - The vulnerable code is the Lantiq XRX200 Ethernet PMAC NAPI RX path, reached solely by frames arriving on the wire to the CPU port of VRX200 DSL gateways; a remote attacker\u2019s packets both induce RX buffer refill and later reuse the poisoned descriptor with no local access required.\nAC:L - An attacker can reliably create the triggering condition by flooding a memory-constrained embedded gateway until napi_alloc_frag fails, permanently storing NULL in that ring slot; any subsequent received frame that reuses the descriptor then crashes, with no uncontrolled race or layout dependency.\nPR:N - There is no authentication, capability check, or credential gate between frame arrival and xrx200_hw_receive()/xrx200_alloc_buf()\u2014reception runs in softirq/NAPI before any socket-level authorization, so unauthenticated network traffic suffices.\nUI:N - The RX path runs autonomously in NAPI/softirq whenever frames arrive; no local user must open a device, mount anything, or take any action for the NULL dereference to occur.\nS:U - The panic and its consequences stay within the host kernel\u2019s security authority on the affected gateway; there is no VM escape, IOMMU bypass, or other cross-boundary impact.\nC:N - build_skb(NULL) faults while constructing skb_shared_info at a low address derived from a NULL head and aborts without returning kernel memory, pointers, or freed-object contents to the attacker.\nI:N - This is a stored NULL software pointer followed by a NULL dereference in build_skb, not an attacker-controlled out-of-bounds/UAF write or type confusion; execution aborts before any control-flow hijack or data-modification primitive is obtained.\nA:H - The NULL pointer dereference occurs in softirq/NAPI context and panics the kernel as described in the fix, fully denying service on the device and remaining re-triggerable after reboot under the same traffic load."}]}], "affected": [{"product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["drivers/net/ethernet/lantiq_xrx200.c"], "versions": [{"version": "7ea6cd16f1599c1eac6018751eadbc5fc736b99a", "lessThan": "3ef2786e32d93e562cd40601248a14ae090de873", "status": "affected", "versionType": "git"}, {"version": "7ea6cd16f1599c1eac6018751eadbc5fc736b99a", "lessThan": "c9c3b1775f80fa21f5bff874027d2ccb10f5d90c", "status": "affected", "versionType": "git"}, {"version": "217395c5ab15e92a4fd84fe77fab6b0b1bb4e456", "status": "affected", "versionType": "git"}, {"version": "70c8418469fb22a679fe5015ebe60fe15011ea43", "status": "affected", "versionType": "git"}, {"version": "5e006cdb9b759f604c4fc69b410aab37cf45f5b4", "status": "affected", "versionType": "git"}, {"version": "5.4.128", "lessThan": "5.5", "status": "affected", "versionType": "semver"}, {"version": "5.10.46", "lessThan": "5.11", "status": "affected", "versionType": "semver"}, {"version": "5.12.13", "lessThan": "5.13", "status": "affected", "versionType": "semver"}]}, {"product": "Linux", "vendor": "Linux", "defaultStatus": "affected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["drivers/net/ethernet/lantiq_xrx200.c"], "versions": [{"version": "5.13", "status": "affected"}, {"version": "0", "lessThan": "5.13", "status": "unaffected", "versionType": "semver"}, {"version": "5.19.6", "lessThanOrEqual": "5.19.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.0", "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": "5.13", "versionEndExcluding": "5.19.6"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.13", "versionEndExcluding": "6.0"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.4.128"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.10.46"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.12.13"}]}]}], "references": [{"url": "https://git.kernel.org/stable/c/3ef2786e32d93e562cd40601248a14ae090de873"}, {"url": "https://git.kernel.org/stable/c/c9c3b1775f80fa21f5bff874027d2ccb10f5d90c"}], "title": "net: lantiq_xrx200: restore buffer if memory allocation failed", "x_generator": {"engine": "bippy-1.2.0"}}}}

{}

{"affected": [{"affectedData": [{"defaultStatus": "unaffected", "product": "Linux", "programFiles": ["drivers/net/ethernet/lantiq_xrx200.c"], "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "versions": [{"lessThan": "3ef2786e32d93e562cd40601248a14ae090de873", "status": "affected", "version": "7ea6cd16f1599c1eac6018751eadbc5fc736b99a", "versionType": "git"}, {"lessThan": "c9c3b1775f80fa21f5bff874027d2ccb10f5d90c", "status": "affected", "version": "7ea6cd16f1599c1eac6018751eadbc5fc736b99a", "versionType": "git"}, {"status": "affected", "version": "217395c5ab15e92a4fd84fe77fab6b0b1bb4e456", "versionType": "git"}, {"status": "affected", "version": "70c8418469fb22a679fe5015ebe60fe15011ea43", "versionType": "git"}, {"status": "affected", "version": "5e006cdb9b759f604c4fc69b410aab37cf45f5b4", "versionType": "git"}, {"lessThan": "5.5", "status": "affected", "version": "5.4.128", "versionType": "semver"}, {"lessThan": "5.11", "status": "affected", "version": "5.10.46", "versionType": "semver"}, {"lessThan": "5.13", "status": "affected", "version": "5.12.13", "versionType": "semver"}]}, {"defaultStatus": "affected", "product": "Linux", "programFiles": ["drivers/net/ethernet/lantiq_xrx200.c"], "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "versions": [{"status": "affected", "version": "5.13"}, {"lessThan": "5.13", "status": "unaffected", "version": "0", "versionType": "semver"}, {"lessThanOrEqual": "5.19.*", "status": "unaffected", "version": "5.19.6", "versionType": "semver"}, {"lessThanOrEqual": "*", "status": "unaffected", "version": "6.0", "versionType": "original_commit_for_fix"}]}], "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}], "configurations": [{"nodes": [{"cpeMatch": [{"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "matchCriteriaId": "FF0E26CA-9CB9-477B-AA35-E7B31CEC27E9", "versionEndExcluding": "5.5", "versionStartIncluding": "5.4.128", "vulnerable": true}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "matchCriteriaId": "743A8541-0DB4-4FAE-8258-3E2246FC59A9", "versionEndExcluding": "5.11", "versionStartIncluding": "5.10.46", "vulnerable": true}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "matchCriteriaId": "345B3FFB-F301-4653-97D4-5E240FD16CC3", "versionEndExcluding": "5.13", "versionStartIncluding": "5.12.13", "vulnerable": true}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "matchCriteriaId": "D16E4756-4459-43FB-B78F-5618D846219F", "versionEndExcluding": "5.19.6", "versionStartIncluding": "5.13.1", "vulnerable": true}, {"criteria": "cpe:2.3:o:linux:linux_kernel:5.13:-:*:*:*:*:*:*", "matchCriteriaId": "8F0E7012-0BA3-4E6A-ADE9-57973CBDEE28", "vulnerable": true}, {"criteria": "cpe:2.3:o:linux:linux_kernel:5.13:rc7:*:*:*:*:*:*", "matchCriteriaId": "F63101C7-E7A3-4C74-9CD5-B5FC5F53F5C8", "vulnerable": true}, {"criteria": "cpe:2.3:o:linux:linux_kernel:6.0:rc1:*:*:*:*:*:*", "matchCriteriaId": "E8BD11A3-8643-49B6-BADE-5029A0117325", "vulnerable": true}, {"criteria": "cpe:2.3:o:linux:linux_kernel:6.0:rc2:*:*:*:*:*:*", "matchCriteriaId": "5F0AD220-F6A9-4012-8636-155F1B841FAD", "vulnerable": true}], "negate": false, "operator": "OR"}]}], "cveTags": [], "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nnet: lantiq_xrx200: restore buffer if memory allocation failed\n\nIn a situation where memory allocation fails, an invalid buffer address\nis stored. When this descriptor is used again, the system panics in the\nbuild_skb() function when accessing memory."}, {"lang": "es", "value": "En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: net: lantiq_xrx200: restaurar el b\u00fafer si falla la asignaci\u00f3n de memoria. En caso de fallo en la asignaci\u00f3n de memoria, se almacena una direcci\u00f3n de b\u00fafer no v\u00e1lida. Al volver a utilizar este descriptor, el sistema entra en p\u00e1nico en la funci\u00f3n build_skb() al acceder a la memoria."}], "id": "CVE-2022-49997", "lastModified": "2026-08-04T10:18:02.527", "metrics": {"cvssMetricV31": [{"cvssData": {"attackComplexity": "LOW", "attackVector": "NETWORK", "availabilityImpact": "HIGH", "baseScore": 7.5, "baseSeverity": "HIGH", "confidentialityImpact": "NONE", "integrityImpact": "NONE", "privilegesRequired": "NONE", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H", "version": "3.1"}, "exploitabilityScore": 3.9, "impactScore": 3.6, "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "type": "Secondary"}, {"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": "2025-06-18T11:15:27.447", "references": [{"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/3ef2786e32d93e562cd40601248a14ae090de873"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/c9c3b1775f80fa21f5bff874027d2ccb10f5d90c"}], "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "vulnStatus": "Modified", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-401"}], "source": "nvd@nist.gov", "type": "Primary"}]}

{"bugzilla": {"description": "kernel: net: lantiq_xrx200: restore buffer if memory allocation failed", "id": "2373408", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2373408"}, "csaw": false, "cvss3": {"cvss3_base_score": "7.0", "cvss3_scoring_vector": "CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H", "status": "draft"}, "details": ["In the Linux kernel, the following vulnerability has been resolved:\nnet: lantiq_xrx200: restore buffer if memory allocation failed\nIn a situation where memory allocation fails, an invalid buffer address\nis stored. When this descriptor is used again, the system panics in the\nbuild_skb() function when accessing memory."], "name": "CVE-2022-49997", "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": "2025-06-18T00:00:00Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2022-49997\nhttps://nvd.nist.gov/vuln/detail/CVE-2022-49997\nhttps://lore.kernel.org/linux-cve-announce/2025061826-CVE-2022-49997-f087@gregkh/T"], "threat_severity": "Moderate"}

{"created": "2025-06-23T08:36:33.968109+00:00", "updated": "2025-06-23T08:36:33.968150+00:00", "vendors": ["linux", "linux$PRODUCT$linux_kernel"]}