{"id":"CVE-2026-43093","revision":"120b304e01d54b05b5945e5b4606916d","records":[{"revision":"120b304e01d54b05b5945e5b4606916d","observedAt":"2026-10-23T15:48:27.903+00:00","statement":{"source":"cve-program","id":"CVE-2026-43093","aliases":[],"title":"xsk: tighten UMEM headroom validation to account for tailroom and min frame","description":"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.","state":0,"publishedAt":"2026-05-06T07:40:25.266+00:00","modifiedAt":"2026-10-19T19:06:13.475+00:00","affected":[{"ecosystem":"Vendor product","name":"Linux","ranges":[],"versions":[],"rawVersionEvidence":"{\n                    \"product\": \"Linux\",\n                    \"vendor\": \"Linux\",\n                    \"defaultStatus\": \"unaffected\",\n                    \"repo\": \"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\",\n                    \"programFiles\": [\n                        \"net/xdp/xdp_umem.c\"\n                    ],\n                    \"versions\": [\n                        {\n                            \"version\": \"99e3a236dd43d06c65af0a2ef9cb44306aef6e02\",\n                            \"lessThan\": \"5f123bc278bf4e3283d8606321bebbfd299f4384\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"99e3a236dd43d06c65af0a2ef9cb44306aef6e02\",\n                            \"lessThan\": \"1a6051cd7e3e4c54ff3854a43b638b9292af5e67\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"99e3a236dd43d06c65af0a2ef9cb44306aef6e02\",\n                            \"lessThan\": \"8769708add9eadeea8041a9761771bb715a87104\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"99e3a236dd43d06c65af0a2ef9cb44306aef6e02\",\n                            \"lessThan\": \"a03975beb9f6af0d8ac051e30b2abeabe618414f\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"99e3a236dd43d06c65af0a2ef9cb44306aef6e02\",\n                            \"lessThan\": \"0ec4d3f6e6934deb843b561ae048cd17218e5ad1\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"99e3a236dd43d06c65af0a2ef9cb44306aef6e02\",\n                            \"lessThan\": \"9ea6ba4f3195dcba6e8b3e7b2e748593b7cafb12\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"99e3a236dd43d06c65af0a2ef9cb44306aef6e02\",\n                            \"lessThan\": \"6523bc1b40e69301f24c14338b762af4739d6d39\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"99e3a236dd43d06c65af0a2ef9cb44306aef6e02\",\n                            \"lessThan\": \"a315e022a72d95ef5f1d4e58e903cb492b0ad931\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"ad8fb61c184fe0f8d1e0b5b954d010fb9f94a6ee\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"25c9cdef57488578da21d99eb614b97ffcf6e59f\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"98d3c852e63b49129515dd18c875999efaf8530a\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"4.19.118\",\n                            \"lessThan\": \"4.20\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"5.4.35\",\n                            \"lessThan\": \"5.5\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"5.6.7\",\n                            \"lessThan\": \"5.7\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"semver\"\n                        }\n                    ]\n                }"},{"ecosystem":"Vendor product","name":"Linux","ranges":[],"versions":[],"rawVersionEvidence":"{\n                    \"product\": \"Linux\",\n                    \"vendor\": \"Linux\",\n                    \"defaultStatus\": \"affected\",\n                    \"repo\": \"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\",\n                    \"programFiles\": [\n                        \"net/xdp/xdp_umem.c\"\n                    ],\n                    \"versions\": [\n                        {\n                            \"version\": \"5.7\",\n                            \"status\": \"affected\"\n                        },\n                        {\n                            \"version\": \"0\",\n                            \"lessThan\": \"5.7\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"5.10.258\",\n                            \"lessThanOrEqual\": \"5.10.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"5.15.209\",\n                            \"lessThanOrEqual\": \"5.15.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"6.1.175\",\n                            \"lessThanOrEqual\": \"6.1.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"6.6.136\",\n                            \"lessThanOrEqual\": \"6.6.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"6.12.83\",\n                            \"lessThanOrEqual\": \"6.12.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"6.18.24\",\n                            \"lessThanOrEqual\": \"6.18.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"6.19.14\",\n                            \"lessThanOrEqual\": \"6.19.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"7.0\",\n                            \"lessThanOrEqual\": \"*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"original_commit_for_fix\"\n                        }\n                    ]\n                }"}],"metrics":[{"system":"CVSS 3.1","vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","score":7.8,"severity":"HIGH"}],"references":["https://git.kernel.org/stable/c/5f123bc278bf4e3283d8606321bebbfd299f4384","https://git.kernel.org/stable/c/1a6051cd7e3e4c54ff3854a43b638b9292af5e67","https://git.kernel.org/stable/c/8769708add9eadeea8041a9761771bb715a87104","https://git.kernel.org/stable/c/a03975beb9f6af0d8ac051e30b2abeabe618414f","https://git.kernel.org/stable/c/0ec4d3f6e6934deb843b561ae048cd17218e5ad1","https://git.kernel.org/stable/c/9ea6ba4f3195dcba6e8b3e7b2e748593b7cafb12","https://git.kernel.org/stable/c/6523bc1b40e69301f24c14338b762af4739d6d39","https://git.kernel.org/stable/c/a315e022a72d95ef5f1d4e58e903cb492b0ad931"],"sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2026-43093","license":"CVE Program Terms of Use","key":"cve-program:CVE-2026-43093","identifiers":["CVE-2026-43093"]},"retained":false,"historicalAffected":[]}],"coverage":[]}