CVE-2026-43039

{"id": "CVE-2026-43039", "cveTags": [], "metrics": {"cvssMetricV31": [{"type": "Secondary", "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "cvssData": {"scope": "UNCHANGED", "version": "3.1", "baseScore": 9.8, "attackVector": "NETWORK", "baseSeverity": "CRITICAL", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H", "integrityImpact": "HIGH", "userInteraction": "NONE", "attackComplexity": "LOW", "availabilityImpact": "HIGH", "privilegesRequired": "NONE", "confidentialityImpact": "HIGH"}, "impactScore": 5.9, "exploitabilityScore": 3.9}]}, "affected": [{"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "affectedData": [{"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "product": "Linux", "versions": [{"status": "affected", "version": "7a64bb388df3cf091afdd047c701039a13acd3b4", "lessThan": "a968438d4fc17ee1dcdc3cfa490dcb5e7709cf76", "versionType": "git"}, {"status": "affected", "version": "7a64bb388df3cf091afdd047c701039a13acd3b4", "lessThan": "5597dd284ff8c556c0b00f6a34473677426e3f81", "versionType": "git"}], "programFiles": ["drivers/net/ethernet/ti/icssg/icssg_common.c"], "defaultStatus": "unaffected"}, {"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "product": "Linux", "versions": [{"status": "affected", "version": "6.19"}, {"status": "unaffected", "version": "0", "lessThan": "6.19", "versionType": "semver"}, {"status": "unaffected", "version": "6.19.12", "versionType": "semver", "lessThanOrEqual": "6.19.*"}, {"status": "unaffected", "version": "7.0", "versionType": "original_commit_for_fix", "lessThanOrEqual": "*"}], "programFiles": ["drivers/net/ethernet/ti/icssg/icssg_common.c"], "defaultStatus": "affected"}]}], "published": "2026-05-01T15:16:50.000", "references": [{"url": "https://git.kernel.org/stable/c/5597dd284ff8c556c0b00f6a34473677426e3f81", "tags": ["Patch"], "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}, {"url": "https://git.kernel.org/stable/c/a968438d4fc17ee1dcdc3cfa490dcb5e7709cf76", "tags": ["Patch"], "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}], "vulnStatus": "Analyzed", "weaknesses": [{"type": "Primary", "source": "nvd@nist.gov", "description": [{"lang": "en", "value": "NVD-CWE-noinfo"}]}], "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nnet: ti: icssg-prueth: fix missing data copy and wrong recycle in ZC RX dispatch\n\nemac_dispatch_skb_zc() allocates a new skb via napi_alloc_skb() but\nnever copies the packet data from the XDP buffer into it. The skb is\npassed up the stack containing uninitialized heap memory instead of\nthe actual received packet, leaking kernel heap contents to userspace.\n\nCopy the received packet data from the XDP buffer into the skb using\nskb_copy_to_linear_data().\n\nAdditionally, remove the skb_mark_for_recycle() call since the skb is\nbacked by the NAPI page frag allocator, not page_pool. Marking a\nnon-page_pool skb for recycle causes the free path to return pages to\na page_pool that does not own them, corrupting page_pool state.\n\nThe non-ZC path (emac_rx_packet) does not have these issues because it\nuses napi_build_skb() to wrap the existing page_pool page directly,\nrequiring no copy, and correctly marks for recycle since the page comes\nfrom page_pool_dev_alloc_pages()."}, {"lang": "es", "value": "En el kernel de Linux, la siguiente vulnerabilidad ha sido resuelta:\n\nnet: ti: icssg-prueth: correcci\u00f3n de copia de datos faltante y reciclaje incorrecto en el despacho ZC RX\n\nemac_dispatch_skb_zc() asigna un nuevo skb a trav\u00e9s de napi_alloc_skb() pero nunca copia los datos del paquete desde el b\u00fafer XDP en \u00e9l. El skb se pasa hacia arriba en la pila conteniendo memoria de pila no inicializada en lugar del paquete recibido real, filtrando contenidos de la pila del kernel al espacio de usuario.\n\nCopie los datos del paquete recibido desde el b\u00fafer XDP en el skb usando skb_copy_to_linear_data().\n\nAdem\u00e1s, elimine la llamada a skb_mark_for_recycle() ya que el skb est\u00e1 respaldado por el asignador de fragmentos de p\u00e1gina NAPI, no por page_pool. Marcar un skb que no es de page_pool para reciclaje hace que la ruta de liberaci\u00f3n devuelva p\u00e1ginas a un page_pool que no las posee, corrompiendo el estado de page_pool.\n\nLa ruta no ZC (emac_rx_packet) no tiene estos problemas porque usa napi_build_skb() para envolver directamente la p\u00e1gina page_pool existente, sin requerir copia, y marca correctamente para reciclaje ya que la p\u00e1gina proviene de page_pool_dev_alloc_pages()."}], "lastModified": "2026-11-11T23:10:00.263", "configurations": [{"nodes": [{"negate": false, "cpeMatch": [{"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "0A2B9540-02D5-41B4-B16A-82AF66FD4F36", "versionEndExcluding": "6.19.12", "versionStartIncluding": "6.19"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:7.0:rc1:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "F253B622-8837-4245-BCE5-A7BF8FC76A16"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:7.0:rc2:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "4AE85AD8-4641-4E7C-A2F4-305E2CD9EE64"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:7.0:rc3:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "F666C8D8-6538-46D4-B318-87610DE64C34"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:7.0:rc4:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "02259FDA-961B-47BC-AE7F-93D7EC6E90C2"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:7.0:rc5:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "58A9FEFF-C040-420D-8F0A-BFDAAA1DF258"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:7.0:rc6:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "1D2315C0-D46F-4F85-9754-F9E5E11374A6"}], "operator": "OR"}]}], "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}