{"id":"CVE-2026-98568","aliases":[],"cve":{"records":[{"id":"CVE-2026-98568","source":"Linux","state":"PUBLISHED","reasons":[],"replacements":[],"disputed":false,"unsupportedWhenAssigned":false,"reserved":"2026-09-25T10:25:14.357Z","published":"2026-10-18T15:18:34.562Z","modified":"2026-10-30T12:38:26.027Z"}],"publishers":[{"name":"Linux","role":"CNA","organizationId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","modified":"2026-10-30T12:38:26.027Z"}],"references":[{"url":"https://git.kernel.org/stable/c/e3e24f4c434c56952412f875b834aa9daaa4fb15","tags":[],"source":"Linux"},{"url":"https://git.kernel.org/stable/c/9ed5a548b42d46e6968a46b67ca8a8e49b12a5a1","tags":[],"source":"Linux"},{"url":"https://git.kernel.org/stable/c/fcaf456092dc86fd5b0b523ac27ec0d114066931","tags":[],"source":"Linux"},{"url":"https://git.kernel.org/stable/c/45a67662bf8ce3aa5643accf98d328dfbb47eaf6","tags":[],"source":"Linux"},{"url":"https://git.kernel.org/stable/c/315d42ca39f69846662961c25dcf2bb07c350d14","tags":[],"source":"Linux"},{"url":"https://git.kernel.org/stable/c/a3c5eb6e382dd426a5e7eb08608897ed57167ff7","tags":[],"source":"Linux"},{"url":"https://git.kernel.org/stable/c/ff022fd9d0f0282c575e11778b96bd1b637503eb","tags":[],"source":"Linux"},{"url":"https://git.kernel.org/stable/c/481506a756dcd828ef42391cb08f38d8d96d38fc","tags":[],"source":"Linux"}],"weaknesses":[],"applicability":[{"source":"Linux","statements":[{"nodes":[{"operator":"OR","negate":false,"cpeMatch":[{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"3.14","versionEndExcluding":"5.10.273"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"3.14","versionEndExcluding":"5.15.224"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"3.14","versionEndExcluding":"6.1.191"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"3.14","versionEndExcluding":"6.6.158"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"3.14","versionEndExcluding":"6.12.112"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"3.14","versionEndExcluding":"6.18.55"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"3.14","versionEndExcluding":"7.2.9"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"3.14","versionEndExcluding":"7.3"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"3.12.18"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"3.13.10"}]}]}]}],"prioritization":[]},"title":"vxlan: use one headroom snapshot for neighbour replies","titleSource":"Linux","descriptionSource":"Linux","description":"In the Linux kernel, the following vulnerability has been resolved:\n\nvxlan: use one headroom snapshot for neighbour replies\n\nvxlan_na_create() samples LL_RESERVED_SPACE() to size the reply skb and then\nsamples it again to reserve headroom. A concurrent vxlan_changelink() can\nupdate needed_headroom between the two reads, creating a TOCTOU race. The\nsecond value can exceed the allocation and make the Ethernet header write out\nof bounds.\n\nThe race is reproducible on the unpatched kernel. It occurred when\nvxlan_na_create() generated a neighbour reply while vxlan_changelink() changed\nthe link headroom. KASAN caught a four-byte write two bytes beyond a 704-byte\nskbuff_small_head allocation.\n\nSnapshot the headroom once and use that value for both allocation and\nreservation.","score":null,"severity":"unknown","published":"2026-10-18T15:18:34.562Z","modified":"2026-10-30T12:38:26.027Z","withdrawn":false,"knownExploited":false,"affected":[],"products":[{"vendor":"Linux","name":"Linux","platforms":[],"versions":[{"version":"4b29dba9c085a4fb79058fb1c45a2f6257ca3dfa","status":"affected","lessThan":"e3e24f4c434c56952412f875b834aa9daaa4fb15","versionType":"git"},{"version":"4b29dba9c085a4fb79058fb1c45a2f6257ca3dfa","status":"affected","lessThan":"9ed5a548b42d46e6968a46b67ca8a8e49b12a5a1","versionType":"git"},{"version":"4b29dba9c085a4fb79058fb1c45a2f6257ca3dfa","status":"affected","lessThan":"fcaf456092dc86fd5b0b523ac27ec0d114066931","versionType":"git"},{"version":"4b29dba9c085a4fb79058fb1c45a2f6257ca3dfa","status":"affected","lessThan":"45a67662bf8ce3aa5643accf98d328dfbb47eaf6","versionType":"git"},{"version":"4b29dba9c085a4fb79058fb1c45a2f6257ca3dfa","status":"affected","lessThan":"315d42ca39f69846662961c25dcf2bb07c350d14","versionType":"git"},{"version":"4b29dba9c085a4fb79058fb1c45a2f6257ca3dfa","status":"affected","lessThan":"a3c5eb6e382dd426a5e7eb08608897ed57167ff7","versionType":"git"},{"version":"4b29dba9c085a4fb79058fb1c45a2f6257ca3dfa","status":"affected","lessThan":"ff022fd9d0f0282c575e11778b96bd1b637503eb","versionType":"git"},{"version":"4b29dba9c085a4fb79058fb1c45a2f6257ca3dfa","status":"affected","lessThan":"481506a756dcd828ef42391cb08f38d8d96d38fc","versionType":"git"},{"version":"d8be18c52dbc94989f6d74637b731af39cd3d902","status":"affected","versionType":"git"},{"version":"3927dace523706cc00f808520eaf2125dd7c07b5","status":"affected","versionType":"git"},{"version":"3.12.18","status":"affected","lessThan":"3.13","versionType":"semver"},{"version":"3.13.10","status":"affected","lessThan":"3.14","versionType":"semver"}],"defaultStatus":"unaffected","cpes":[],"source":"Linux","url":"https://www.cve.org/CVERecord?id=CVE-2026-98568"},{"vendor":"Linux","name":"Linux","platforms":[],"versions":[{"version":"3.14","status":"affected"},{"version":"0","status":"unaffected","lessThan":"3.14","versionType":"semver"},{"version":"5.10.273","status":"unaffected","lessThanOrEqual":"5.10.*","versionType":"semver"},{"version":"5.15.224","status":"unaffected","lessThanOrEqual":"5.15.*","versionType":"semver"},{"version":"6.1.191","status":"unaffected","lessThanOrEqual":"6.1.*","versionType":"semver"},{"version":"6.6.158","status":"unaffected","lessThanOrEqual":"6.6.*","versionType":"semver"},{"version":"6.12.112","status":"unaffected","lessThanOrEqual":"6.12.*","versionType":"semver"},{"version":"6.18.55","status":"unaffected","lessThanOrEqual":"6.18.*","versionType":"semver"},{"version":"7.2.9","status":"unaffected","lessThanOrEqual":"7.2.*","versionType":"semver"},{"version":"7.3","status":"unaffected","lessThanOrEqual":"*","versionType":"original_commit_for_fix"}],"defaultStatus":"affected","cpes":[],"source":"Linux","url":"https://www.cve.org/CVERecord?id=CVE-2026-98568"}],"remediation":[],"references":["https://git.kernel.org/stable/c/e3e24f4c434c56952412f875b834aa9daaa4fb15","https://git.kernel.org/stable/c/9ed5a548b42d46e6968a46b67ca8a8e49b12a5a1","https://git.kernel.org/stable/c/fcaf456092dc86fd5b0b523ac27ec0d114066931","https://git.kernel.org/stable/c/45a67662bf8ce3aa5643accf98d328dfbb47eaf6","https://git.kernel.org/stable/c/315d42ca39f69846662961c25dcf2bb07c350d14","https://git.kernel.org/stable/c/a3c5eb6e382dd426a5e7eb08608897ed57167ff7","https://git.kernel.org/stable/c/ff022fd9d0f0282c575e11778b96bd1b637503eb","https://git.kernel.org/stable/c/481506a756dcd828ef42391cb08f38d8d96d38fc"],"sources":[{"name":"CVE","id":"CVE-2026-98568","modified":"2026-10-30T12:38:26.027Z","url":"https://www.cve.org/CVERecord?id=CVE-2026-98568"}],"assessments":[],"sourceAffected":[],"observedAt":"2026-10-30T14:01:50.362Z","kev":{"status":"not-listed","checkedAt":"2026-11-14T23:35:33.875Z"},"coverage":[{"source":"NVD","status":"not-checked"},{"source":"GHSA","status":"not-checked"},{"source":"EUVD","status":"not-checked"},{"source":"EPSS","status":"not-checked"}],"evidence":[],"aiSummary":null}