CVE-2025-40053

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If the allocation fails, it falls\nback to the normal path.\n\nTested-on: D-Link DGE-550T Rev-A3"}], "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 NIC RX completion path reached solely by frames arriving on the wire, and small IP packets routed from anywhere on the internet land in this path. No local access or account on the target is needed.\nAC:L - The gating condition is a GFP_ATOMIC skb allocation failure, which an attacker can reliably drive by flooding the interface and exhausting memory while simultaneously supplying the short frames that take the copy-break branch. The identical stmmac RX-exhaustion NULL deref was scored AC:L.\nPR:N - Frames are processed in the interrupt handler before any socket, credential, or filtering decision, so an unauthenticated attacker with no account on the system triggers the path just by sending traffic.\nUI:N - Packet reception and the resulting dereference happen autonomously in the driver's interrupt handler; no local user action is required.\nS:U - The fault occurs in the kernel and its impact is confined to the same kernel security authority, with no crossing of a VM, IOMMU, or sandbox boundary.\nC:N - The dereference is at a fixed small offset from NULL with no attacker control over the address or any returned data, so no kernel memory contents are disclosed.\nI:N - The only write is `skb->dev = dev` at a fixed NULL-page offset that is unmapped under mmap_min_addr; it yields no controlled write primitive and modifies no kernel data.\nA:H - The NULL dereference occurs in hard-IRQ context, producing a fatal 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No local access or account on the target is needed.\nAC:L - The gating condition is a GFP_ATOMIC skb allocation failure, which an attacker can reliably drive by flooding the interface and exhausting memory while simultaneously supplying the short frames that take the copy-break branch. The identical stmmac RX-exhaustion NULL deref was scored AC:L.\nPR:N - Frames are processed in the interrupt handler before any socket, credential, or filtering decision, so an unauthenticated attacker with no account on the system triggers the path just by sending traffic.\nUI:N - Packet reception and the resulting dereference happen autonomously in the driver's interrupt handler; no local user action is required.\nS:U - The fault occurs in the kernel and its impact is confined to the same kernel security authority, with no crossing of a VM, IOMMU, or sandbox boundary.\nC:N - The dereference is at a fixed small offset from NULL with no attacker control over the address or any returned data, so no kernel memory contents are disclosed.\nI:N - The only write is `skb->dev = dev` at a fixed NULL-page offset that is unmapped under mmap_min_addr; it yields no controlled write primitive and modifies no kernel data.\nA:H - The NULL dereference occurs in hard-IRQ context, producing a fatal exception in interrupt and a full kernel panic, and it can be re-triggered by an unauthenticated remote attacker."}]}], "affected": [{"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "product": "Linux", "versions": [{"status": "affected", "version": "1da177e4c3f41524e886b7f1b8a0c1fc7321cac2", "lessThan": "84fd710a704f3d53d4120e452e86cea558cf73a8", "versionType": "git"}, {"status": "affected", "version": "1da177e4c3f41524e886b7f1b8a0c1fc7321cac2", "lessThan": "5aa9b885602811a026a3f45c92ea2b4b04c54f09", "versionType": "git"}, {"status": "affected", "version": "1da177e4c3f41524e886b7f1b8a0c1fc7321cac2", "lessThan": "9d49e4b14609e1a20d931e718962c4b6b5485174", "versionType": "git"}, {"status": "affected", "version": "1da177e4c3f41524e886b7f1b8a0c1fc7321cac2", "lessThan": "ea87151df398d407a632c7bf63013290f01c5009", "versionType": "git"}, {"status": "affected", "version": "1da177e4c3f41524e886b7f1b8a0c1fc7321cac2", "lessThan": "7ed5010fef0930f4322d620052edc854ef3ec41f", "versionType": "git"}, {"status": "affected", "version": "1da177e4c3f41524e886b7f1b8a0c1fc7321cac2", "lessThan": "fd7b6b2c920d7fd370a612be416a904d6e1ebe55", "versionType": "git"}, {"status": "affected", "version": "1da177e4c3f41524e886b7f1b8a0c1fc7321cac2", "lessThan": "8169a6011c5fecc6cb1c3654c541c567d3318de8", "versionType": "git"}], "programFiles": ["drivers/net/ethernet/dlink/dl2k.c"], "defaultStatus": "unaffected"}, {"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "product": "Linux", "versions": [{"status": "affected", "version": "2.6.12"}, {"status": "unaffected", "version": "0", "lessThan": "2.6.12", "versionType": "semver"}, {"status": "unaffected", "version": "5.10.246", "versionType": "semver", "lessThanOrEqual": "5.10.*"}, {"status": "unaffected", "version": "5.15.195", "versionType": "semver", "lessThanOrEqual": "5.15.*"}, {"status": "unaffected", "version": "6.1.156", "versionType": "semver", "lessThanOrEqual": "6.1.*"}, {"status": "unaffected", "version": "6.6.112", "versionType": "semver", "lessThanOrEqual": "6.6.*"}, {"status": "unaffected", "version": "6.12.53", "versionType": "semver", "lessThanOrEqual": "6.12.*"}, {"status": "unaffected", "version": "6.17.3", "versionType": "semver", "lessThanOrEqual": "6.17.*"}, {"status": "unaffected", "version": "6.18", "versionType": "original_commit_for_fix", "lessThanOrEqual": "*"}], "programFiles": ["drivers/net/ethernet/dlink/dl2k.c"], "defaultStatus": "affected"}], "references": [{"url": "https://git.kernel.org/stable/c/84fd710a704f3d53d4120e452e86cea558cf73a8"}, {"url": "https://git.kernel.org/stable/c/5aa9b885602811a026a3f45c92ea2b4b04c54f09"}, {"url": "https://git.kernel.org/stable/c/9d49e4b14609e1a20d931e718962c4b6b5485174"}, {"url": "https://git.kernel.org/stable/c/ea87151df398d407a632c7bf63013290f01c5009"}, {"url": "https://git.kernel.org/stable/c/7ed5010fef0930f4322d620052edc854ef3ec41f"}, {"url": "https://git.kernel.org/stable/c/fd7b6b2c920d7fd370a612be416a904d6e1ebe55"}, {"url": "https://git.kernel.org/stable/c/8169a6011c5fecc6cb1c3654c541c567d3318de8"}], "x_generator": {"engine": "bippy-1.2.0"}, "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nnet: dlink: handle copy_thresh allocation failure\n\nThe driver did not handle failure of `netdev_alloc_skb_ip_align()`.\nIf the allocation failed, dereferencing `skb->protocol` could lead to\na NULL pointer dereference.\n\nThis patch tries to allocate `skb`. If the allocation fails, it falls\nback to the normal path.\n\nTested-on: D-Link DGE-550T Rev-A3"}], "cpeApplicability": [{"nodes": [{"negate": false, "cpeMatch": [{"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "versionEndExcluding": "5.10.246", "versionStartIncluding": "2.6.12"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "versionEndExcluding": "5.15.195", "versionStartIncluding": "2.6.12"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "versionEndExcluding": "6.1.156", "versionStartIncluding": "2.6.12"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "versionEndExcluding": "6.6.112", "versionStartIncluding": "2.6.12"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "versionEndExcluding": "6.12.53", "versionStartIncluding": "2.6.12"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "versionEndExcluding": "6.17.3", "versionStartIncluding": "2.6.12"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "versionEndExcluding": "6.18", "versionStartIncluding": "2.6.12"}], "operator": "OR"}]}], "providerMetadata": {"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-08-05T12:07:23.851Z"}}}, "cveMetadata": {"cveId": "CVE-2025-40053", "state": "PUBLISHED", "dateUpdated": "2026-10-15T22:02:37.095Z", "dateReserved": "2025-04-16T07:20:57.157Z", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "datePublished": "2025-10-28T11:48:28.444Z", "assignerShortName": "Linux"}, "dataVersion": "5.2"}

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If the allocation fails, it falls\nback to the normal path.\n\nTested-on: D-Link DGE-550T Rev-A3"}, {"lang": "es", "value": "En el kernel de Linux, la siguiente vulnerabilidad ha sido resuelta:\n\nnet: dlink: manejar el fallo de asignaci\u00f3n de copy_thresh\n\nEl controlador no manej\u00f3 el fallo de 'netdev_alloc_skb_ip_align()'.\nSi la asignaci\u00f3n fallaba, desreferenciar 'skb->protocol' podr\u00eda llevar a una desreferencia de puntero NULL.\n\nEste parche intenta asignar 'skb'. Si la asignaci\u00f3n falla, recurre a la ruta normal.\n\nProbado en: D-Link DGE-550T Rev-A3"}], "id": "CVE-2025-40053", "lastModified": "2026-10-19T21:10:00.160", "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"}], "ssvcV203": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "ssvcData": {"id": "CVE-2025-40053", "options": [{"exploitation": "none"}, {"automatable": "yes"}, {"technicalImpact": "partial"}], "role": "CISA Coordinator", "timestamp": "2026-10-15T21:56:34.706462Z", "version": "2.0.3"}}]}, "published": "2025-10-28T12:15:39.510", "references": [{"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/5aa9b885602811a026a3f45c92ea2b4b04c54f09"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/7ed5010fef0930f4322d620052edc854ef3ec41f"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/8169a6011c5fecc6cb1c3654c541c567d3318de8"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/84fd710a704f3d53d4120e452e86cea558cf73a8"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/9d49e4b14609e1a20d931e718962c4b6b5485174"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/ea87151df398d407a632c7bf63013290f01c5009"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/fd7b6b2c920d7fd370a612be416a904d6e1ebe55"}], "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "vulnStatus": "Deferred"}

{"bugzilla": {"description": "kernel: net: dlink: handle copy_thresh allocation failure", "id": "2406738", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2406738"}, "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": ["No description is available for this CVE."], "name": "CVE-2025-40053", "package_state": [{"cpe": "cpe:/o:redhat:enterprise_linux:10", "fix_state": "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": "Affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:8", "fix_state": "Affected", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 9"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Affected", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 9"}], "public_date": "2025-10-28T00:00:00Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2025-40053\nhttps://nvd.nist.gov/vuln/detail/CVE-2025-40053\nhttps://lore.kernel.org/linux-cve-announce/2025102814-CVE-2025-40053-8e42@gregkh/T"], "threat_severity": "Moderate"}

{"created": "2025-10-29T10:58:12.804285+00:00", "updated": "2025-10-29T10:58:12.804311+00:00", "vendors": ["linux", "linux$PRODUCT$linux_kernel"]}