{"id":"CVE-2026-64414","summary":"netfilter: handle unreadable frags","details":"In the Linux kernel, the following vulnerability has been resolved:\n\nnetfilter: handle unreadable frags\n\nsashiko reports:\n When an skb with unreadable fragments (such as from devmem TCP, where\n skb_frags_readable(skb) returns false) is processed by the u32 module,\n skb_copy_bits() will safely return a negative error code [..]\n\nxt_u32: bail out with hotdrop in this case.\ngather_frags: return -1, just as if we had no fragment header.\nnfnetlink_queue: restrict to the linear part.\nnfnetlink_log: restrict to the linear part.\n\nv2:\n - skb_zerocopy helpers don't copy readable flag, i.e. nfnetlink_queue\n is broken too\n xt_u32 shouldn't return true if hotdrop was set.","modified":"2026-07-28T04:03:05.452928379Z","published":"2026-07-25T08:50:54.495Z","database_specific":{"cna_assigner":"Linux","osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/64xxx/CVE-2026-64414.json"},"references":[{"type":"WEB","url":"https://git.kernel.org/stable/c/3b13e7635795394705920cca1e1db7e4ca2e334b"},{"type":"WEB","url":"https://git.kernel.org/stable/c/57056be3ec12e7d9ecd20a60d4060f510e4f284c"},{"type":"WEB","url":"https://git.kernel.org/stable/c/da5b58478a9c1b85608c9e40a3b8432d071b409e"},{"type":"WEB","url":"https://git.kernel.org/stable/c/fc5bfe63bacf8a3ae307b62b34206406ca733354"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/64xxx/CVE-2026-64414.json"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-64414"},{"type":"PACKAGE","url":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","events":[{"introduced":"65249feb6b3df9e17bab5911ee56fa7b0971e231"},{"fixed":"3b13e7635795394705920cca1e1db7e4ca2e334b"},{"fixed":"fc5bfe63bacf8a3ae307b62b34206406ca733354"},{"fixed":"57056be3ec12e7d9ecd20a60d4060f510e4f284c"},{"fixed":"da5b58478a9c1b85608c9e40a3b8432d071b409e"}]}],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-64414.json"}},{"package":{"name":"Kernel","ecosystem":"Linux"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"6.12.0"},{"fixed":"6.12.96"}]},{"type":"ECOSYSTEM","events":[{"introduced":"6.13.0"},{"fixed":"6.18.39"}]},{"type":"ECOSYSTEM","events":[{"introduced":"6.19.0"},{"fixed":"7.1.4"}]}],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-64414.json"}}],"schema_version":"1.7.5","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H"}]}