{"id":"CVE-2026-80862","summary":"nvme-tcp: fix usage of page_frag_cache","details":"In the Linux kernel, the following vulnerability has been resolved:\n\nnvme-tcp: fix usage of page_frag_cache\n\nnvme uses page_frag_cache to preallocate PDU for each preallocated request\nof block device. Block devices are created in parallel threads,\nconsequently page_frag_cache is used in not thread-safe manner.\nThat leads to incorrect refcounting of backstore pages and premature free.\n\nThat can be catched by !sendpage_ok inside network stack:\n\nWARNING: CPU: 7 PID: 467 at ../net/core/skbuff.c:6931 skb_splice_from_iter+0xfa/0x310.\n\ttcp_sendmsg_locked+0x782/0xce0\n\ttcp_sendmsg+0x27/0x40\n\tsock_sendmsg+0x8b/0xa0\n\tnvme_tcp_try_send_cmd_pdu+0x149/0x2a0\nThen random panic may occur.\n\nFix that by serializing the usage of page_frag_cache.","modified":"2026-09-06T03:46:27.815590184Z","published":"2026-09-04T15:55:16.653Z","database_specific":{"cna_assigner":"Linux","osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/80xxx/CVE-2026-80862.json"},"references":[{"type":"WEB","url":"https://git.kernel.org/stable/c/0a9750263ffacbbd2048a391fd4bd22e2146c57d"},{"type":"WEB","url":"https://git.kernel.org/stable/c/36ac05f7cfd59d90c597071304b14e98090d5dd1"},{"type":"WEB","url":"https://git.kernel.org/stable/c/64561afb42d8390695bf810d9bbd087cbca00291"},{"type":"WEB","url":"https://git.kernel.org/stable/c/6e4cf281558709b92ec2ca3054fe2ffc69266ef9"},{"type":"WEB","url":"https://git.kernel.org/stable/c/d19f98c79f1b7e09e4cdf5c20d626e571e487467"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/80xxx/CVE-2026-80862.json"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-80862"},{"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":"4e893ca8117022de68ce1b61c0309e3d17bb8a25"},{"fixed":"d19f98c79f1b7e09e4cdf5c20d626e571e487467"},{"fixed":"64561afb42d8390695bf810d9bbd087cbca00291"},{"fixed":"0a9750263ffacbbd2048a391fd4bd22e2146c57d"},{"fixed":"6e4cf281558709b92ec2ca3054fe2ffc69266ef9"},{"fixed":"36ac05f7cfd59d90c597071304b14e98090d5dd1"}]}],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-80862.json"}},{"package":{"name":"Kernel","ecosystem":"Linux"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"6.12.0"},{"fixed":"6.12.108"}]},{"type":"ECOSYSTEM","events":[{"introduced":"6.13.0"},{"fixed":"6.18.49"}]},{"type":"ECOSYSTEM","events":[{"introduced":"6.19.0"},{"fixed":"7.1.13"}]},{"type":"ECOSYSTEM","events":[{"introduced":"7.2.0"},{"fixed":"7.2.3"}]}],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-80862.json"}}],"schema_version":"1.9.0"}