{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-43093","assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","state":"PUBLISHED","assignerShortName":"Linux","dateReserved":"2026-05-01T14:12:55.984Z","datePublished":"2026-05-06T07:40:25.266Z","dateUpdated":"2026-05-11T22:17:35.645Z"},"containers":{"cna":{"providerMetadata":{"orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","shortName":"Linux","dateUpdated":"2026-05-11T22:17:35.645Z"},"descriptions":[{"lang":"en","value":"In the Linux kernel, the following vulnerability has been resolved:\n\nxsk: tighten UMEM headroom validation to account for tailroom and min frame\n\nThe current headroom validation in xdp_umem_reg() could leave us with\ninsufficient space dedicated to even receive minimum-sized ethernet\nframe. Furthermore if multi-buffer would come to play then\nskb_shared_info stored at the end of XSK frame would be corrupted.\n\nHW typically works with 128-aligned sizes so let us provide this value\nas bare minimum.\n\nMulti-buffer setting is known later in the configuration process so\nbesides accounting for 128 bytes, let us also take care of tailroom space\nupfront."}],"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"}}],"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":"99e3a236dd43d06c65af0a2ef9cb44306aef6e02","lessThan":"a03975beb9f6af0d8ac051e30b2abeabe618414f","status":"affected","versionType":"git"},{"version":"99e3a236dd43d06c65af0a2ef9cb44306aef6e02","lessThan":"0ec4d3f6e6934deb843b561ae048cd17218e5ad1","status":"affected","versionType":"git"},{"version":"99e3a236dd43d06c65af0a2ef9cb44306aef6e02","lessThan":"9ea6ba4f3195dcba6e8b3e7b2e748593b7cafb12","status":"affected","versionType":"git"},{"version":"99e3a236dd43d06c65af0a2ef9cb44306aef6e02","lessThan":"6523bc1b40e69301f24c14338b762af4739d6d39","status":"affected","versionType":"git"},{"version":"99e3a236dd43d06c65af0a2ef9cb44306aef6e02","lessThan":"a315e022a72d95ef5f1d4e58e903cb492b0ad931","status":"affected","versionType":"git"},{"version":"ad8fb61c184fe0f8d1e0b5b954d010fb9f94a6ee","status":"affected","versionType":"git"},{"version":"25c9cdef57488578da21d99eb614b97ffcf6e59f","status":"affected","versionType":"git"},{"version":"98d3c852e63b49129515dd18c875999efaf8530a","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":"5.7","status":"affected"},{"version":"0","lessThan":"5.7","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":"5.7","versionEndExcluding":"6.6.136"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.7","versionEndExcluding":"6.12.83"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.7","versionEndExcluding":"6.18.24"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.7","versionEndExcluding":"6.19.14"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.7","versionEndExcluding":"7.0"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"4.19.118"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.4.35"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.6.7"}]}]}],"references":[{"url":"https://git.kernel.org/stable/c/a03975beb9f6af0d8ac051e30b2abeabe618414f"},{"url":"https://git.kernel.org/stable/c/0ec4d3f6e6934deb843b561ae048cd17218e5ad1"},{"url":"https://git.kernel.org/stable/c/9ea6ba4f3195dcba6e8b3e7b2e748593b7cafb12"},{"url":"https://git.kernel.org/stable/c/6523bc1b40e69301f24c14338b762af4739d6d39"},{"url":"https://git.kernel.org/stable/c/a315e022a72d95ef5f1d4e58e903cb492b0ad931"}],"title":"xsk: tighten UMEM headroom validation to account for tailroom and min frame","x_generator":{"engine":"bippy-1.2.0"}}}}