{"affected":[{"defaultStatus":"unaffected","product":"Linux","source":"CNA: Linux","vendor":"Linux","versions":[{"lessThan":"1c623e3cbf43f12dd4a72712079bfa247a9b8ba3","status":"affected","version":"af2806f8f90a150160be898cd85332459c83c5cb","versionType":"git"},{"lessThan":"d7d6ff98d5d1b400f02211f962ac32cc0020aeab","status":"affected","version":"af2806f8f90a150160be898cd85332459c83c5cb","versionType":"git"},{"lessThan":"1a9c180cd8435917b7516edfb1c9148032c28773","status":"affected","version":"af2806f8f90a150160be898cd85332459c83c5cb","versionType":"git"},{"lessThan":"79dc34beb1fdb3da79753e51e15c68591a2561fe","status":"affected","version":"af2806f8f90a150160be898cd85332459c83c5cb","versionType":"git"}]},{"defaultStatus":"affected","product":"Linux","source":"CNA: Linux","vendor":"Linux","versions":[{"status":"affected","version":"3.14"},{"lessThan":"3.14","status":"unaffected","version":"0","versionType":"semver"},{"lessThanOrEqual":"6.18.*","status":"unaffected","version":"6.18.61","versionType":"semver"},{"lessThanOrEqual":"7.2.*","status":"unaffected","version":"7.2.15","versionType":"semver"},{"lessThanOrEqual":"7.3.*","status":"unaffected","version":"7.3.2","versionType":"semver"},{"lessThanOrEqual":"*","status":"unaffected","version":"7.4-rc1","versionType":"original_commit_for_fix"}]}],"cveId":"CVE-2026-99284","cwes":[],"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.","epss":null,"exploits":[],"kev":null,"metrics":[],"modifiedAt":1794086220603,"publishedAt":1794084033661,"references":[{"source":"CNA: Linux","tags":[],"url":"https://git.kernel.org/stable/c/1c623e3cbf43f12dd4a72712079bfa247a9b8ba3"},{"source":"CNA: Linux","tags":[],"url":"https://git.kernel.org/stable/c/d7d6ff98d5d1b400f02211f962ac32cc0020aeab"},{"source":"CNA: Linux","tags":[],"url":"https://git.kernel.org/stable/c/1a9c180cd8435917b7516edfb1c9148032c28773"},{"source":"CNA: Linux","tags":[],"url":"https://git.kernel.org/stable/c/79dc34beb1fdb3da79753e51e15c68591a2561fe"},{"source":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"url":"https://git.kernel.org/stable/c/1a9c180cd8435917b7516edfb1c9148032c28773"},{"source":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"url":"https://git.kernel.org/stable/c/1c623e3cbf43f12dd4a72712079bfa247a9b8ba3"},{"source":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"url":"https://git.kernel.org/stable/c/79dc34beb1fdb3da79753e51e15c68591a2561fe"},{"source":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"url":"https://git.kernel.org/stable/c/d7d6ff98d5d1b400f02211f962ac32cc0020aeab"}],"remediation":[],"revision":"f485d4b75d628cad14220d783892f1db475dd9aaad80125254b5e14775a568a0","sources":[{"modifiedAt":1794084033661,"name":"CNA: Linux","retrievedAt":1794085702080,"url":"https://www.cve.org/CVERecord?id=CVE-2026-99284"},{"modifiedAt":1794086220603,"name":"NVD","retrievedAt":1794097102678,"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-99284"}],"ssvc":null,"status":"published","title":"net: skbuff: propagate shared-frag marker in skb_zerocopy()","updatedAt":1794097102678}