{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-43092", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2026-05-01T14:12:55.984Z", "datePublished": "2026-05-06T07:40:24.619Z", "dateUpdated": "2026-05-06T07:40:24.619Z"}, "containers": {"cna": {"providerMetadata": {"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-05-06T07:40:24.619Z"}, "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nxsk: validate MTU against usable frame size on bind\n\nAF_XDP bind currently accepts zero-copy pool configurations without\nverifying that the device MTU fits into the usable frame space provided\nby the UMEM chunk.\n\nThis becomes a problem since we started to respect tailroom which is\nsubtracted from chunk_size (among with headroom). 2k chunk size might\nnot provide enough space for standard 1500 MTU, so let us catch such\nsettings at bind time. Furthermore, validate whether underlying HW will\nbe able to satisfy configured MTU wrt XSK's frame size multiplied by\nsupported Rx buffer chain length (that is exposed via\nnet_device::xdp_zc_max_segs)."}], "affected": [{"product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["net/xdp/xsk_buff_pool.c"], "versions": [{"version": "24ea50127ecf0efe819c1f6230add27abc6ca9d9", "lessThan": "a55793e5a97d4e39bdb380873a9780fe0010bff6", "status": "affected", "versionType": "git"}, {"version": "24ea50127ecf0efe819c1f6230add27abc6ca9d9", "lessThan": "f669d60db11dbabb96279f2b20f9d1cba43cddb2", "status": "affected", "versionType": "git"}, {"version": "24ea50127ecf0efe819c1f6230add27abc6ca9d9", "lessThan": "25e1e91a8da819924df0b16e3812d7b24c8ce133", "status": "affected", "versionType": "git"}, {"version": "24ea50127ecf0efe819c1f6230add27abc6ca9d9", "lessThan": "b2f4daa6422fd6cc0cec969794dab4a88ea4cea1", "status": "affected", "versionType": "git"}, {"version": "24ea50127ecf0efe819c1f6230add27abc6ca9d9", "lessThan": "36ee60b569ba0dfb6f961333b90d19ab5b323fa9", "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_buff_pool.c"], "versions": [{"version": "6.6", "status": "affected"}, {"version": "0", "lessThan": "6.6", "status": "unaffected", "versionType": "semver"}, {"version": "6.6.136", "lessThanOrEqual": "6.6.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.12.83", "lessThanOrEqual": "6.12.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.18.24", "lessThanOrEqual": "6.18.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.19.14", "lessThanOrEqual": "6.19.*", "status": "unaffected", "versionType": "semver"}, {"version": "7.0", "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": "6.6", "versionEndExcluding": "6.6.136"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.6", "versionEndExcluding": "6.12.83"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.6", "versionEndExcluding": "6.18.24"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.6", "versionEndExcluding": "6.19.14"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.6", "versionEndExcluding": "7.0"}]}]}], "references": [{"url": "https://git.kernel.org/stable/c/a55793e5a97d4e39bdb380873a9780fe0010bff6"}, {"url": "https://git.kernel.org/stable/c/f669d60db11dbabb96279f2b20f9d1cba43cddb2"}, {"url": "https://git.kernel.org/stable/c/25e1e91a8da819924df0b16e3812d7b24c8ce133"}, {"url": "https://git.kernel.org/stable/c/b2f4daa6422fd6cc0cec969794dab4a88ea4cea1"}, {"url": "https://git.kernel.org/stable/c/36ee60b569ba0dfb6f961333b90d19ab5b323fa9"}], "title": "xsk: validate MTU against usable frame size on bind", "x_generator": {"engine": "bippy-1.2.0"}}}}

{}

{"cveTags": [], "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nxsk: validate MTU against usable frame size on bind\n\nAF_XDP bind currently accepts zero-copy pool configurations without\nverifying that the device MTU fits into the usable frame space provided\nby the UMEM chunk.\n\nThis becomes a problem since we started to respect tailroom which is\nsubtracted from chunk_size (among with headroom). 2k chunk size might\nnot provide enough space for standard 1500 MTU, so let us catch such\nsettings at bind time. Furthermore, validate whether underlying HW will\nbe able to satisfy configured MTU wrt XSK's frame size multiplied by\nsupported Rx buffer chain length (that is exposed via\nnet_device::xdp_zc_max_segs)."}], "id": "CVE-2026-43092", "lastModified": "2026-05-06T13:08:07.970", "metrics": {}, "published": "2026-05-06T10:16:22.550", "references": [{"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/25e1e91a8da819924df0b16e3812d7b24c8ce133"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/36ee60b569ba0dfb6f961333b90d19ab5b323fa9"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/a55793e5a97d4e39bdb380873a9780fe0010bff6"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/b2f4daa6422fd6cc0cec969794dab4a88ea4cea1"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/f669d60db11dbabb96279f2b20f9d1cba43cddb2"}], "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "vulnStatus": "Awaiting Analysis"}

{"bugzilla": {"description": "kernel: xsk: validate MTU against usable frame size on bind", "id": "2467008", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2467008"}, "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-1284", "details": ["A flaw was found in the Linux kernel's AF_XDP (eXpress Data Path) subsystem. The AF_XDP bind operation fails to validate the Maximum Transmission Unit (MTU) against the usable frame space provided by the UMEM (User Memory) chunk. This can lead to situations where the configured MTU does not fit, potentially causing network communication failures or system instability. A local attacker could potentially leverage this vulnerability to disrupt network services, resulting in a denial of service."], "name": "CVE-2026-43092", "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": "2026-05-06T00:00:00Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2026-43092\nhttps://nvd.nist.gov/vuln/detail/CVE-2026-43092\nhttps://lore.kernel.org/linux-cve-announce/2026050618-CVE-2026-43092-883d@gregkh/T"], "threat_severity": "Low"}