{"id":"CVE-2026-43093","url":"https://www.cyber-defence.io/tools/cve/CVE-2026-43093","generatedAt":"2026-10-28T03:32:42.123Z","title":"In the Linux kernel, the following vulnerability has been resolved: xsk: tighten UMEM headroom validation to account for tailroom and min frame The current headroom validation in xdp_umem_reg() could leave us with insufficient space dedicated to even…","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.","published":"2026-05-06T10:16:23.000Z","lastModified":"2026-10-19T20:18:05.000Z","status":"Modified","sourceIdentifier":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","cvss":{"version":"3.1","score":7.8,"severity":"HIGH","vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H"},"cwe":["CWE-787"],"affected":["linux/linux kernel"],"epss":{"score":0.00135,"percentile":0.02969,"date":"2026-10-27","history":[]},"kev":{"listed":false},"exploits":{"count":0,"verified":false,"firstPublished":null,"source":"Exploit-DB (https://gitlab.com/exploit-database/exploitdb)","entries":[]},"verdict":{"level":"high","text":"High impact if exploited, but EPSS currently rates exploitation as unlikely (0.14%). Schedule it in the normal patch cycle and watch for a rise in EPSS or a public exploit."},"changes":[],"references":[{"url":"https://git.kernel.org/stable/c/0ec4d3f6e6934deb843b561ae048cd17218e5ad1","tags":["Patch"],"source":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/1a6051cd7e3e4c54ff3854a43b638b9292af5e67","source":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/5f123bc278bf4e3283d8606321bebbfd299f4384","source":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/6523bc1b40e69301f24c14338b762af4739d6d39","tags":["Patch"],"source":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/8769708add9eadeea8041a9761771bb715a87104","source":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/9ea6ba4f3195dcba6e8b3e7b2e748593b7cafb12","tags":["Patch"],"source":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/a03975beb9f6af0d8ac051e30b2abeabe618414f","tags":["Patch"],"source":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/a315e022a72d95ef5f1d4e58e903cb492b0ad931","tags":["Patch"],"source":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://cert-portal.siemens.com/productcert/html/ssa-784472.html","source":"0b142b55-0307-4c5a-b3c9-f314f3fb7c5e"}],"sources":{"nvd":"https://nvd.nist.gov/vuln/detail/CVE-2026-43093","epss":"https://www.first.org/epss/","kev":"https://www.cisa.gov/known-exploited-vulnerabilities-catalog","exploitdb":"https://www.exploit-db.com/"},"licence":"CC BY 4.0 — link back to the CVE Explorer if you publish the results; upstream data remains subject to its own terms."}