{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-74710", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2026-08-15T05:44:03.928Z", "datePublished": "2026-08-22T15:33:07.172Z", "dateUpdated": "2026-08-25T05:41:52.464Z"}, "containers": {"cna": {"providerMetadata": {"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-08-25T05:41:52.464Z"}, "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nxsk: require at least 16 bytes of TX metadata\n\nAF_XDP accepts a TX metadata length as small as eight bytes, but every\nsupported request needs the flags plus at least one eight-byte request\nfield. Such short metadata also lets the kernel read beyond the registered\narea.\n\nRequire 16 bytes rather than sizeof(struct xsk_tx_metadata) to preserve\ncompatibility with applications that do not use launch-time metadata."}], "metrics": [{"cvssV3_1": {"version": "3.1", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H", "baseScore": 7.8, "baseSeverity": "HIGH"}, "scenarios": [{"lang": "en", "value": "AV:L - The bug is reached only through local AF_XDP setup\u2014socket(AF_XDP), setsockopt(XDP_UMEM_REG) with tx_metadata_len=8, ring configuration, bind, and TX descriptor submission\u2014not via remote packet handling or network-facing services.\nAC:L - The attacker fully controls tx_metadata_len, descriptor addresses, metadata flags, and TX timing, and can place frames at chunk boundaries to reliably trigger kernel reads/writes past the declared 8-byte metadata headroom.\nPR:L - AF_XDP socket creation requires CAP_NET_RAW (xsk_create()); per kernel CNA guidance this is Low because unprivileged processes can obtain it inside user/network namespaces (e.g., unshare -Urn).\nUI:N - No victim action is required; the attacker configures their own AF_XDP socket, UMEM, rings, and TX descriptors to trigger the faulty metadata handling during transmit.\nS:U - Impact is confined to kernel processing of attacker-supplied AF_XDP metadata and pinned UMEM frames; it does not cross VM, hypervisor, or IOMMU isolation boundaries.\nC:H - With only 8 bytes registered, the kernel still dereferences xsk_tx_metadata request fields (checksum, launch time) beyond the metadata area; this out-of-bounds read can cross chunk/UMEM boundaries and expose adjacent memory.\nI:H - TX timestamp completion writes through meta->completion.tx_timestamp when only 8 bytes of metadata were reserved, causing an out-of-bounds write past the registered metadata headroom that can corrupt adjacent memory or be leveraged further.\nA:H - Reading or writing metadata fields beyond the registered length at chunk/UMEM edges can access unmapped pages and trigger kernel faults; out-of-bounds kernel accesses in this path can cause oops/panic-level denial of service."}]}], "affected": [{"product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["net/xdp/xdp_umem.c"], "versions": [{"version": "341ac980eab90ac1f6c22ee9f9da83ed9604d899", "lessThan": "21b8536aee819792f1b4b38b9aacf2a073025d49", "status": "affected", "versionType": "git"}, {"version": "341ac980eab90ac1f6c22ee9f9da83ed9604d899", "lessThan": "642c6e73fce17fdca93a5793c4d22359fda866d7", "status": "affected", "versionType": "git"}, {"version": "341ac980eab90ac1f6c22ee9f9da83ed9604d899", "lessThan": "cfb9d2976b277e554e28c165e3eff4b4a8ea10bd", "status": "affected", "versionType": "git"}, {"version": "341ac980eab90ac1f6c22ee9f9da83ed9604d899", "lessThan": "1bb30b181d9f0484e141f8411e15ed906d5c6780", "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/xdp_umem.c"], "versions": [{"version": "6.8", "status": "affected"}, {"version": "0", "lessThan": "6.8", "status": "unaffected", "versionType": "semver"}, {"version": "6.12.104", "lessThanOrEqual": "6.12.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.18.45", "lessThanOrEqual": "6.18.*", "status": "unaffected", "versionType": "semver"}, {"version": "7.1.9", "lessThanOrEqual": "7.1.*", "status": "unaffected", "versionType": "semver"}, {"version": "7.2", "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": "6.12.104"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.8", "versionEndExcluding": "6.18.45"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.8", "versionEndExcluding": "7.1.9"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.8", "versionEndExcluding": "7.2"}]}]}], "references": [{"url": "https://git.kernel.org/stable/c/21b8536aee819792f1b4b38b9aacf2a073025d49"}, {"url": "https://git.kernel.org/stable/c/642c6e73fce17fdca93a5793c4d22359fda866d7"}, {"url": "https://git.kernel.org/stable/c/cfb9d2976b277e554e28c165e3eff4b4a8ea10bd"}, {"url": "https://git.kernel.org/stable/c/1bb30b181d9f0484e141f8411e15ed906d5c6780"}], "title": "xsk: require at least 16 bytes of TX metadata", "x_generator": {"engine": "bippy-1.2.0"}}}}

{}

{"affected": [{"affectedData": [{"defaultStatus": "unaffected", "product": "Linux", "programFiles": ["net/xdp/xdp_umem.c"], "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "versions": [{"lessThan": "21b8536aee819792f1b4b38b9aacf2a073025d49", "status": "affected", "version": "341ac980eab90ac1f6c22ee9f9da83ed9604d899", "versionType": "git"}, {"lessThan": "642c6e73fce17fdca93a5793c4d22359fda866d7", "status": "affected", "version": "341ac980eab90ac1f6c22ee9f9da83ed9604d899", "versionType": "git"}, {"lessThan": "cfb9d2976b277e554e28c165e3eff4b4a8ea10bd", "status": "affected", "version": "341ac980eab90ac1f6c22ee9f9da83ed9604d899", "versionType": "git"}, {"lessThan": "1bb30b181d9f0484e141f8411e15ed906d5c6780", "status": "affected", "version": "341ac980eab90ac1f6c22ee9f9da83ed9604d899", "versionType": "git"}]}, {"defaultStatus": "affected", "product": "Linux", "programFiles": ["net/xdp/xdp_umem.c"], "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "versions": [{"status": "affected", "version": "6.8"}, {"lessThan": "6.8", "status": "unaffected", "version": "0", "versionType": "semver"}, {"lessThanOrEqual": "6.12.*", "status": "unaffected", "version": "6.12.104", "versionType": "semver"}, {"lessThanOrEqual": "6.18.*", "status": "unaffected", "version": "6.18.45", "versionType": "semver"}, {"lessThanOrEqual": "7.1.*", "status": "unaffected", "version": "7.1.9", "versionType": "semver"}, {"lessThanOrEqual": "*", "status": "unaffected", "version": "7.2", "versionType": "original_commit_for_fix"}]}], "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}], "cveTags": [], "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nxsk: require at least 16 bytes of TX metadata\n\nAF_XDP accepts a TX metadata length as small as eight bytes, but every\nsupported request needs the flags plus at least one eight-byte request\nfield. Such short metadata also lets the kernel read beyond the registered\narea.\n\nRequire 16 bytes rather than sizeof(struct xsk_tx_metadata) to preserve\ncompatibility with applications that do not use launch-time metadata."}], "id": "CVE-2026-74710", "lastModified": "2026-08-25T06:18:55.687", "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"}]}, "published": "2026-08-22T16:16:45.743", "references": [{"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/1bb30b181d9f0484e141f8411e15ed906d5c6780"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/21b8536aee819792f1b4b38b9aacf2a073025d49"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/642c6e73fce17fdca93a5793c4d22359fda866d7"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/cfb9d2976b277e554e28c165e3eff4b4a8ea10bd"}], "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "vulnStatus": "Received"}

{"bugzilla": {"description": "kernel: xsk: require at least 16 bytes of TX metadata", "id": "2521421", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2521421"}, "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"}, "cwe": "CWE-125", "details": ["In the Linux kernel, the following vulnerability has been resolved:\nxsk: require at least 16 bytes of TX metadata\nAF_XDP accepts a TX metadata length as small as eight bytes, but every\nsupported request needs the flags plus at least one eight-byte request\nfield. Such short metadata also lets the kernel read beyond the registered\narea.\nRequire 16 bytes rather than sizeof(struct xsk_tx_metadata) to preserve\ncompatibility with applications that do not use launch-time metadata.", "A flaw was found in the Linux kernel's AF_XDP (eXpress Data Path) component. This vulnerability arises because the AF_XDP mechanism accepts a transmit (TX) metadata length that is smaller than required, allowing the kernel to read beyond its designated memory area. An attacker could potentially exploit this out-of-bounds read to gain unauthorized access to sensitive information, leading to information disclosure."], "name": "CVE-2026-74710", "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": "2026-08-22T00:00:00Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2026-74710\nhttps://nvd.nist.gov/vuln/detail/CVE-2026-74710\nhttps://lore.kernel.org/linux-cve-announce/2026082237-CVE-2026-74710-5bcd@gregkh/T"], "threat_severity": "Moderate"}