{"id":"CVE-2026-99284","aliases":[],"cve":{"records":[{"id":"CVE-2026-99284","source":"Linux","state":"PUBLISHED","reasons":[],"replacements":[],"disputed":false,"unsupportedWhenAssigned":false,"reserved":"2026-09-25T10:25:14.405Z","published":"2026-11-07T20:40:33.661Z","modified":"2026-11-10T18:15:30.724Z"}],"publishers":[{"name":"Linux","role":"CNA","organizationId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","modified":"2026-11-10T18:15:30.724Z"}],"references":[{"url":"https://git.kernel.org/stable/c/fe8477e23dd2ee6bce231d65f2586a333b211dc0","tags":[],"source":"Linux"},{"url":"https://git.kernel.org/stable/c/1c623e3cbf43f12dd4a72712079bfa247a9b8ba3","tags":[],"source":"Linux"},{"url":"https://git.kernel.org/stable/c/d7d6ff98d5d1b400f02211f962ac32cc0020aeab","tags":[],"source":"Linux"},{"url":"https://git.kernel.org/stable/c/1a9c180cd8435917b7516edfb1c9148032c28773","tags":[],"source":"Linux"},{"url":"https://git.kernel.org/stable/c/79dc34beb1fdb3da79753e51e15c68591a2561fe","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":"6.12.117"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"3.14","versionEndExcluding":"6.18.61"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"3.14","versionEndExcluding":"7.2.15"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"3.14","versionEndExcluding":"7.3.2"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"3.14","versionEndExcluding":"7.4-rc1"}]}]}]}],"prioritization":[]},"title":"net: skbuff: propagate shared-frag marker in skb_zerocopy()","titleSource":"Linux","descriptionSource":"Linux","description":"In the Linux kernel, the following vulnerability has been resolved:\n\nnet: skbuff: propagate shared-frag marker in skb_zerocopy()\n\nskb_zerocopy() moves frag descriptors from @from into @to and takes a\nreference on each frag, but it does not copy skb_shinfo(from)->flags into\nskb_shinfo(to)->flags.  A destination skb holding the same page-cache\nbacked frags as the source therefore reports skb_has_shared_frag() as\nfalse.\n\nThat breaks the invariant relied on by later in-place writers.  ESP input\nchecks skb_has_shared_frag() before deciding whether an uncloned\nnonlinear skb can skip skb_cow_data(); with the marker lost, an skb that\nskb_zerocopy() built for nfnetlink_queue or for an openvswitch upcall is\ndecrypted in place, letting an unprivileged user write into the page\ncache of a root-owned read-only file.\n\nPropagate SKBFL_SHARED_FRAG when frag descriptors are copied, as done for\nthe other frag-transfer helpers.","score":null,"severity":"unknown","published":"2026-11-07T20:40:33.661Z","modified":"2026-11-10T18:15:30.724Z","withdrawn":false,"knownExploited":false,"affected":[],"products":[{"vendor":"Linux","name":"Linux","platforms":[],"versions":[{"version":"af2806f8f90a150160be898cd85332459c83c5cb","status":"affected","lessThan":"fe8477e23dd2ee6bce231d65f2586a333b211dc0","versionType":"git"},{"version":"af2806f8f90a150160be898cd85332459c83c5cb","status":"affected","lessThan":"1c623e3cbf43f12dd4a72712079bfa247a9b8ba3","versionType":"git"},{"version":"af2806f8f90a150160be898cd85332459c83c5cb","status":"affected","lessThan":"d7d6ff98d5d1b400f02211f962ac32cc0020aeab","versionType":"git"},{"version":"af2806f8f90a150160be898cd85332459c83c5cb","status":"affected","lessThan":"1a9c180cd8435917b7516edfb1c9148032c28773","versionType":"git"},{"version":"af2806f8f90a150160be898cd85332459c83c5cb","status":"affected","lessThan":"79dc34beb1fdb3da79753e51e15c68591a2561fe","versionType":"git"}],"defaultStatus":"unaffected","cpes":[],"source":"Linux","url":"https://www.cve.org/CVERecord?id=CVE-2026-99284"},{"vendor":"Linux","name":"Linux","platforms":[],"versions":[{"version":"3.14","status":"affected"},{"version":"0","status":"unaffected","lessThan":"3.14","versionType":"semver"},{"version":"6.12.117","status":"unaffected","lessThanOrEqual":"6.12.*","versionType":"semver"},{"version":"6.18.61","status":"unaffected","lessThanOrEqual":"6.18.*","versionType":"semver"},{"version":"7.2.15","status":"unaffected","lessThanOrEqual":"7.2.*","versionType":"semver"},{"version":"7.3.2","status":"unaffected","lessThanOrEqual":"7.3.*","versionType":"semver"},{"version":"7.4-rc1","status":"unaffected","lessThanOrEqual":"*","versionType":"original_commit_for_fix"}],"defaultStatus":"affected","cpes":[],"source":"Linux","url":"https://www.cve.org/CVERecord?id=CVE-2026-99284"}],"remediation":[],"references":["https://git.kernel.org/stable/c/fe8477e23dd2ee6bce231d65f2586a333b211dc0","https://git.kernel.org/stable/c/1c623e3cbf43f12dd4a72712079bfa247a9b8ba3","https://git.kernel.org/stable/c/d7d6ff98d5d1b400f02211f962ac32cc0020aeab","https://git.kernel.org/stable/c/1a9c180cd8435917b7516edfb1c9148032c28773","https://git.kernel.org/stable/c/79dc34beb1fdb3da79753e51e15c68591a2561fe"],"sources":[{"name":"CVE","id":"CVE-2026-99284","modified":"2026-11-10T18:15:30.724Z","url":"https://www.cve.org/CVERecord?id=CVE-2026-99284"}],"assessments":[],"sourceAffected":[],"observedAt":"2026-11-10T20:29:58.401Z","kev":{"status":"not-listed","checkedAt":"2026-11-14T21:30:34.002Z"},"coverage":[{"source":"NVD","status":"no-result","checkedAt":"2026-11-07T20:50:32.295Z","attemptedAt":"2026-11-07T20:50:32.295Z"},{"source":"GHSA","status":"no-result","checkedAt":"2026-11-07T20:50:32.323Z","attemptedAt":"2026-11-07T20:50:32.323Z"},{"source":"EUVD","status":"no-result","checkedAt":"2026-11-07T20:50:32.295Z","attemptedAt":"2026-11-07T20:50:32.295Z"},{"source":"EPSS","status":"no-result","checkedAt":"2026-11-07T20:50:32.323Z","attemptedAt":"2026-11-07T20:50:32.323Z"}],"evidence":[],"aiSummary":null}