{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2025-40159", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2025-04-16T07:20:57.176Z", "datePublished": "2025-11-12T10:24:36.104Z", "dateUpdated": "2025-11-12T10:24:36.104Z"}, "containers": {"cna": {"providerMetadata": {"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2025-11-12T10:24:36.104Z"}, "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nxsk: Harden userspace-supplied xdp_desc validation\n\nTurned out certain clearly invalid values passed in xdp_desc from\nuserspace can pass xp_{,un}aligned_validate_desc() and then lead\nto UBs or just invalid frames to be queued for xmit.\n\ndesc->len close to ``U32_MAX`` with a non-zero pool->tx_metadata_len\ncan cause positive integer overflow and wraparound, the same way low\nenough desc->addr with a non-zero pool->tx_metadata_len can cause\nnegative integer overflow. Both scenarios can then pass the\nvalidation successfully.\nThis doesn't happen with valid XSk applications, but can be used\nto perform attacks.\n\nAlways promote desc->len to ``u64`` first to exclude positive\noverflows of it. Use explicit check_{add,sub}_overflow() when\nvalidating desc->addr (which is ``u64`` already).\n\nbloat-o-meter reports a little growth of the code size:\n\nadd/remove: 0/0 grow/shrink: 2/1 up/down: 60/-16 (44)\nFunction old new delta\nxskq_cons_peek_desc 299 330 +31\nxsk_tx_peek_release_desc_batch 973 1002 +29\nxsk_generic_xmit 3148 3132 -16\n\nbut hopefully this doesn't hurt the performance much."}], "affected": [{"product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["net/xdp/xsk_queue.h"], "versions": [{"version": "341ac980eab90ac1f6c22ee9f9da83ed9604d899", "lessThan": "1463cd066f32efd56ddfd3ac4e3524200f362980", "status": "affected", "versionType": "git"}, {"version": "341ac980eab90ac1f6c22ee9f9da83ed9604d899", "lessThan": "5b5fffa7c81e55d8c8edf05ad40d811ec7047e21", "status": "affected", "versionType": "git"}, {"version": "341ac980eab90ac1f6c22ee9f9da83ed9604d899", "lessThan": "07ca98f906a403637fc5e513a872a50ef1247f3b", "status": "affected", "versionType": "git"}]}, {"product": "Linux", "vendor": "Linux", "defaultStatus": "affected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["net/xdp/xsk_queue.h"], "versions": [{"version": "6.8", "status": "affected"}, {"version": "0", "lessThan": "6.8", "status": "unaffected", "versionType": "semver"}, {"version": "6.12.54", "lessThanOrEqual": "6.12.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.17.4", "lessThanOrEqual": "6.17.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.18-rc1", "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": "6.8", "versionEndExcluding": "6.12.54"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.8", "versionEndExcluding": "6.17.4"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.8", "versionEndExcluding": "6.18-rc1"}]}]}], "references": [{"url": "https://git.kernel.org/stable/c/1463cd066f32efd56ddfd3ac4e3524200f362980"}, {"url": "https://git.kernel.org/stable/c/5b5fffa7c81e55d8c8edf05ad40d811ec7047e21"}, {"url": "https://git.kernel.org/stable/c/07ca98f906a403637fc5e513a872a50ef1247f3b"}], "title": "xsk: Harden userspace-supplied xdp_desc validation", "x_generator": {"engine": "bippy-1.2.0"}}}}

{}

{"cveTags": [], "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nxsk: Harden userspace-supplied xdp_desc validation\n\nTurned out certain clearly invalid values passed in xdp_desc from\nuserspace can pass xp_{,un}aligned_validate_desc() and then lead\nto UBs or just invalid frames to be queued for xmit.\n\ndesc->len close to ``U32_MAX`` with a non-zero pool->tx_metadata_len\ncan cause positive integer overflow and wraparound, the same way low\nenough desc->addr with a non-zero pool->tx_metadata_len can cause\nnegative integer overflow. Both scenarios can then pass the\nvalidation successfully.\nThis doesn't happen with valid XSk applications, but can be used\nto perform attacks.\n\nAlways promote desc->len to ``u64`` first to exclude positive\noverflows of it. Use explicit check_{add,sub}_overflow() when\nvalidating desc->addr (which is ``u64`` already).\n\nbloat-o-meter reports a little growth of the code size:\n\nadd/remove: 0/0 grow/shrink: 2/1 up/down: 60/-16 (44)\nFunction old new delta\nxskq_cons_peek_desc 299 330 +31\nxsk_tx_peek_release_desc_batch 973 1002 +29\nxsk_generic_xmit 3148 3132 -16\n\nbut hopefully this doesn't hurt the performance much."}], "id": "CVE-2025-40159", "lastModified": "2025-11-12T16:19:12.850", "metrics": {}, "published": "2025-11-12T11:15:46.000", "references": [{"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/07ca98f906a403637fc5e513a872a50ef1247f3b"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/1463cd066f32efd56ddfd3ac4e3524200f362980"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/5b5fffa7c81e55d8c8edf05ad40d811ec7047e21"}], "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "vulnStatus": "Awaiting Analysis"}

{"bugzilla": {"description": "kernel: xsk: Harden userspace-supplied xdp_desc validation", "id": "2414496", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2414496"}, "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:\nxsk: Harden userspace-supplied xdp_desc validation\nTurned out certain clearly invalid values passed in xdp_desc from\nuserspace can pass xp_{,un}aligned_validate_desc() and then lead\nto UBs or just invalid frames to be queued for xmit.\ndesc->len close to ``U32_MAX`` with a non-zero pool->tx_metadata_len\ncan cause positive integer overflow and wraparound, the same way low\nenough desc->addr with a non-zero pool->tx_metadata_len can cause\nnegative integer overflow. Both scenarios can then pass the\nvalidation successfully.\nThis doesn't happen with valid XSk applications, but can be used\nto perform attacks.\nAlways promote desc->len to ``u64`` first to exclude positive\noverflows of it. Use explicit check_{add,sub}_overflow() when\nvalidating desc->addr (which is ``u64`` already).\nbloat-o-meter reports a little growth of the code size:\nadd/remove: 0/0 grow/shrink: 2/1 up/down: 60/-16 (44)\nFunction old new delta\nxskq_cons_peek_desc 299 330 +31\nxsk_tx_peek_release_desc_batch 973 1002 +29\nxsk_generic_xmit 3148 3132 -16\nbut hopefully this doesn't hurt the performance much."], "name": "CVE-2025-40159", "package_state": [{"cpe": "cpe:/o:redhat:enterprise_linux:10", "fix_state": "Fix deferred", "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": "Fix deferred", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 9"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Fix deferred", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 9"}], "public_date": "2025-11-12T00:00:00Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2025-40159\nhttps://nvd.nist.gov/vuln/detail/CVE-2025-40159\nhttps://lore.kernel.org/linux-cve-announce/2025111239-CVE-2025-40159-fe53@gregkh/T"], "threat_severity": "Low"}