{"id":"CVE-2026-74435","aliases":[],"url":"https://o3.security/vulnerability/CVE-2026-74435","summary":"rxrpc: rxrpc_verify_data ensure rx_dec_buffer alloc","details":"In the Linux kernel, the following vulnerability has been resolved:\n\nrxrpc: rxrpc_verify_data ensure rx_dec_buffer alloc\n\nrxrpc_recvmsg_data() calls rxrpc_verify_data() whenever the\nrxrpc_call.rx_dec_buffer is unallocated and assumes that upon\nsuccessful return that rx_dec_buffer must be allocated.\nHowever, rxrpc_verify_data() does not request an allocation if\nthe rxrpc_skb_priv.len is zero.\n\nIn addition, failure to allocate rx_dec_buffer will result in a\ncall to skb_copy_bits() with a NULL destination which can\ntrigger a NULL pointer dereference.\n\nTo prevent these issues rxrpc_verify_data() is modified to\nalways attempt to allocate the rxrpc_call.rx_dec_buffer if it\nis NULL.\n\nThis issue was identified with assistance of a private\nsashiko instance.","published":"2026-08-15T05:59:34.073Z","modified":"2026-08-18T03:56:48.707223825Z","cvss":{"score":7.5,"severity":"HIGH","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H"},"epss":null,"cisaKev":null,"exploitsKnown":null,"affectedPackages":[{"ecosystem":"Linux","name":"Kernel","fixedVersion":"6.6.145"}],"fix":null,"references":[{"type":"WEB","url":"https://git.kernel.org/stable/c/16c8ae9735c5bd7e54dd7478d6348e0fc860842d"},{"type":"WEB","url":"https://git.kernel.org/stable/c/6563b4eb38c35d75892445bcf8aacdc29914821c"},{"type":"WEB","url":"https://git.kernel.org/stable/c/8bbede0afced346b24e4fbde0c68cf12980ba948"},{"type":"WEB","url":"https://git.kernel.org/stable/c/a962bc8508592c4d51092edac68579bd8b18fe44"},{"type":"WEB","url":"https://git.kernel.org/stable/c/d3b642cf95d48234590cc91450d8705a9bf6b540"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/74xxx/CVE-2026-74435.json"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-74435"},{"type":"PACKAGE","url":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git"}],"provenance":{"sources":["OSV.dev","FIRST.org (EPSS)"],"lastVerified":"2026-08-18T03:56:48.707223825Z"}}