{"api_version":"1","generated_at":"2026-05-13T07:40:17+00:00","cve":"CVE-2026-43092","urls":{"html":"https://cve.report/CVE-2026-43092","api":"https://cve.report/api/cve/CVE-2026-43092.json","docs":"https://cve.report/api","cve_org":"https://www.cve.org/CVERecord?id=CVE-2026-43092","nvd":"https://nvd.nist.gov/vuln/detail/CVE-2026-43092"},"summary":{"title":"xsk: validate MTU against usable frame size on bind","description":"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).","state":"PUBLISHED","assigner":"Linux","published_at":"2026-05-06 10:16:22","updated_at":"2026-05-06 13:08:07"},"problem_types":[],"metrics":[],"references":[{"url":"https://git.kernel.org/stable/c/36ee60b569ba0dfb6f961333b90d19ab5b323fa9","name":"https://git.kernel.org/stable/c/36ee60b569ba0dfb6f961333b90d19ab5b323fa9","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/b2f4daa6422fd6cc0cec969794dab4a88ea4cea1","name":"https://git.kernel.org/stable/c/b2f4daa6422fd6cc0cec969794dab4a88ea4cea1","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/25e1e91a8da819924df0b16e3812d7b24c8ce133","name":"https://git.kernel.org/stable/c/25e1e91a8da819924df0b16e3812d7b24c8ce133","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/a55793e5a97d4e39bdb380873a9780fe0010bff6","name":"https://git.kernel.org/stable/c/a55793e5a97d4e39bdb380873a9780fe0010bff6","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/f669d60db11dbabb96279f2b20f9d1cba43cddb2","name":"https://git.kernel.org/stable/c/f669d60db11dbabb96279f2b20f9d1cba43cddb2","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://www.cve.org/CVERecord?id=CVE-2026-43092","name":"CVE Program record","refsource":"CVE.ORG","tags":["canonical"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-43092","name":"NVD vulnerability detail","refsource":"NVD","tags":["canonical","analysis"]}],"affected":[{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 24ea50127ecf0efe819c1f6230add27abc6ca9d9 a55793e5a97d4e39bdb380873a9780fe0010bff6 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 24ea50127ecf0efe819c1f6230add27abc6ca9d9 f669d60db11dbabb96279f2b20f9d1cba43cddb2 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 24ea50127ecf0efe819c1f6230add27abc6ca9d9 25e1e91a8da819924df0b16e3812d7b24c8ce133 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 24ea50127ecf0efe819c1f6230add27abc6ca9d9 b2f4daa6422fd6cc0cec969794dab4a88ea4cea1 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 24ea50127ecf0efe819c1f6230add27abc6ca9d9 36ee60b569ba0dfb6f961333b90d19ab5b323fa9 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 6.6","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 6.6 semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 6.6.136 6.6.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 6.12.83 6.12.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 6.18.24 6.18.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 6.19.14 6.19.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 7.0 * original_commit_for_fix","platforms":[]}],"timeline":[],"solutions":[],"workarounds":[],"exploits":[],"credits":[],"nvd_cpes":[],"vendor_comments":[],"enrichments":{"kev":null,"epss":null,"legacy_qids":[]},"source_records":{"cve_program":{"containers":{"cna":{"affected":[{"defaultStatus":"unaffected","product":"Linux","programFiles":["net/xdp/xsk_buff_pool.c"],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","vendor":"Linux","versions":[{"lessThan":"a55793e5a97d4e39bdb380873a9780fe0010bff6","status":"affected","version":"24ea50127ecf0efe819c1f6230add27abc6ca9d9","versionType":"git"},{"lessThan":"f669d60db11dbabb96279f2b20f9d1cba43cddb2","status":"affected","version":"24ea50127ecf0efe819c1f6230add27abc6ca9d9","versionType":"git"},{"lessThan":"25e1e91a8da819924df0b16e3812d7b24c8ce133","status":"affected","version":"24ea50127ecf0efe819c1f6230add27abc6ca9d9","versionType":"git"},{"lessThan":"b2f4daa6422fd6cc0cec969794dab4a88ea4cea1","status":"affected","version":"24ea50127ecf0efe819c1f6230add27abc6ca9d9","versionType":"git"},{"lessThan":"36ee60b569ba0dfb6f961333b90d19ab5b323fa9","status":"affected","version":"24ea50127ecf0efe819c1f6230add27abc6ca9d9","versionType":"git"}]},{"defaultStatus":"affected","product":"Linux","programFiles":["net/xdp/xsk_buff_pool.c"],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","vendor":"Linux","versions":[{"status":"affected","version":"6.6"},{"lessThan":"6.6","status":"unaffected","version":"0","versionType":"semver"},{"lessThanOrEqual":"6.6.*","status":"unaffected","version":"6.6.136","versionType":"semver"},{"lessThanOrEqual":"6.12.*","status":"unaffected","version":"6.12.83","versionType":"semver"},{"lessThanOrEqual":"6.18.*","status":"unaffected","version":"6.18.24","versionType":"semver"},{"lessThanOrEqual":"6.19.*","status":"unaffected","version":"6.19.14","versionType":"semver"},{"lessThanOrEqual":"*","status":"unaffected","version":"7.0","versionType":"original_commit_for_fix"}]}],"cpeApplicability":[{"nodes":[{"cpeMatch":[{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"6.6.136","versionStartIncluding":"6.6","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"6.12.83","versionStartIncluding":"6.6","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"6.18.24","versionStartIncluding":"6.6","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"6.19.14","versionStartIncluding":"6.6","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"7.0","versionStartIncluding":"6.6","vulnerable":true}],"negate":false,"operator":"OR"}]}],"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)."}],"providerMetadata":{"dateUpdated":"2026-05-06T07:40:24.619Z","orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","shortName":"Linux"},"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"}}},"cveMetadata":{"assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","assignerShortName":"Linux","cveId":"CVE-2026-43092","datePublished":"2026-05-06T07:40:24.619Z","dateReserved":"2026-05-01T14:12:55.984Z","dateUpdated":"2026-05-06T07:40:24.619Z","state":"PUBLISHED"},"dataType":"CVE_RECORD","dataVersion":"5.2"},"nvd":{"publishedDate":"2026-05-06 10:16:22","lastModifiedDate":"2026-05-06 13:08:07","problem_types":[],"metrics":[],"configurations":[]},"legacy_mitre":{"record":{"CveYear":"2026","CveId":"43092","Ordinal":"1","Title":"xsk: validate MTU against usable frame size on bind","CVE":"CVE-2026-43092","Year":"2026"},"notes":[{"CveYear":"2026","CveId":"43092","Ordinal":"1","NoteData":"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).","Type":"Description","Title":"xsk: validate MTU against usable frame size on bind"}]}}}