{"id":"CVE-2026-80862","state":"PUBLISHED","title":"nvme-tcp: fix usage of page_frag_cache","description":"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.","publishedAt":"2026-09-04T15:55:16.653Z","updatedAt":"2026-10-21T12:47:08.178Z","severity":null,"assigner":"Linux","products":["Linux Linux"],"affected":[{"vendor":"Linux","product":"Linux","defaultStatus":"unaffected","versions":[{"version":"4e893ca8117022de68ce1b61c0309e3d17bb8a25","status":"affected","lessThan":"d19f98c79f1b7e09e4cdf5c20d626e571e487467","versionType":"git"},{"version":"4e893ca8117022de68ce1b61c0309e3d17bb8a25","status":"affected","lessThan":"64561afb42d8390695bf810d9bbd087cbca00291","versionType":"git"},{"version":"4e893ca8117022de68ce1b61c0309e3d17bb8a25","status":"affected","lessThan":"0a9750263ffacbbd2048a391fd4bd22e2146c57d","versionType":"git"},{"version":"4e893ca8117022de68ce1b61c0309e3d17bb8a25","status":"affected","lessThan":"6e4cf281558709b92ec2ca3054fe2ffc69266ef9","versionType":"git"},{"version":"4e893ca8117022de68ce1b61c0309e3d17bb8a25","status":"affected","lessThan":"36ac05f7cfd59d90c597071304b14e98090d5dd1","versionType":"git"},{"version":"c57506918b078ecab7dedebef0f34dbc23ae2e46","status":"affected","versionType":"git"},{"version":"6.6.160","status":"affected","lessThan":"6.7","versionType":"semver"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/nvme/host/tcp.c"]},{"vendor":"Linux","product":"Linux","defaultStatus":"affected","versions":[{"version":"6.12","status":"affected"},{"version":"0","status":"unaffected","lessThan":"6.12","versionType":"semver"},{"version":"6.12.108","status":"unaffected","lessThanOrEqual":"6.12.*","versionType":"semver"},{"version":"6.18.49","status":"unaffected","lessThanOrEqual":"6.18.*","versionType":"semver"},{"version":"7.1.13","status":"unaffected","lessThanOrEqual":"7.1.*","versionType":"semver"},{"version":"7.2.3","status":"unaffected","lessThanOrEqual":"7.2.*","versionType":"semver"},{"version":"7.3","status":"unaffected","lessThanOrEqual":"*","versionType":"original_commit_for_fix"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/nvme/host/tcp.c"]}],"references":["https://git.kernel.org/stable/c/d19f98c79f1b7e09e4cdf5c20d626e571e487467","https://git.kernel.org/stable/c/64561afb42d8390695bf810d9bbd087cbca00291","https://git.kernel.org/stable/c/0a9750263ffacbbd2048a391fd4bd22e2146c57d","https://git.kernel.org/stable/c/6e4cf281558709b92ec2ca3054fe2ffc69266ef9","https://git.kernel.org/stable/c/36ac05f7cfd59d90c597071304b14e98090d5dd1"],"weaknesses":[],"ingestedAt":"2026-10-29T20:13:07.220Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2026/80xxx/CVE-2026-80862.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-80862","state":"PUBLISHED","datePublished":"2026-09-04T15:55:16.653Z","dateUpdated":"2026-10-21T12:47:08.178Z","assignerShortName":"Linux","assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","dateReserved":"2026-08-26T14:34:25.798Z"},"containers":{"cna":{"title":"nvme-tcp: fix usage of page_frag_cache","descriptions":[{"lang":"en","value":"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."}],"affected":[{"vendor":"Linux","product":"Linux","defaultStatus":"unaffected","versions":[{"version":"4e893ca8117022de68ce1b61c0309e3d17bb8a25","status":"affected","lessThan":"d19f98c79f1b7e09e4cdf5c20d626e571e487467","versionType":"git"},{"version":"4e893ca8117022de68ce1b61c0309e3d17bb8a25","status":"affected","lessThan":"64561afb42d8390695bf810d9bbd087cbca00291","versionType":"git"},{"version":"4e893ca8117022de68ce1b61c0309e3d17bb8a25","status":"affected","lessThan":"0a9750263ffacbbd2048a391fd4bd22e2146c57d","versionType":"git"},{"version":"4e893ca8117022de68ce1b61c0309e3d17bb8a25","status":"affected","lessThan":"6e4cf281558709b92ec2ca3054fe2ffc69266ef9","versionType":"git"},{"version":"4e893ca8117022de68ce1b61c0309e3d17bb8a25","status":"affected","lessThan":"36ac05f7cfd59d90c597071304b14e98090d5dd1","versionType":"git"},{"version":"c57506918b078ecab7dedebef0f34dbc23ae2e46","status":"affected","versionType":"git"},{"version":"6.6.160","status":"affected","lessThan":"6.7","versionType":"semver"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/nvme/host/tcp.c"]},{"vendor":"Linux","product":"Linux","defaultStatus":"affected","versions":[{"version":"6.12","status":"affected"},{"version":"0","status":"unaffected","lessThan":"6.12","versionType":"semver"},{"version":"6.12.108","status":"unaffected","lessThanOrEqual":"6.12.*","versionType":"semver"},{"version":"6.18.49","status":"unaffected","lessThanOrEqual":"6.18.*","versionType":"semver"},{"version":"7.1.13","status":"unaffected","lessThanOrEqual":"7.1.*","versionType":"semver"},{"version":"7.2.3","status":"unaffected","lessThanOrEqual":"7.2.*","versionType":"semver"},{"version":"7.3","status":"unaffected","lessThanOrEqual":"*","versionType":"original_commit_for_fix"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/nvme/host/tcp.c"]}],"references":[{"url":"https://git.kernel.org/stable/c/d19f98c79f1b7e09e4cdf5c20d626e571e487467"},{"url":"https://git.kernel.org/stable/c/64561afb42d8390695bf810d9bbd087cbca00291"},{"url":"https://git.kernel.org/stable/c/0a9750263ffacbbd2048a391fd4bd22e2146c57d"},{"url":"https://git.kernel.org/stable/c/6e4cf281558709b92ec2ca3054fe2ffc69266ef9"},{"url":"https://git.kernel.org/stable/c/36ac05f7cfd59d90c597071304b14e98090d5dd1"}],"providerMetadata":{"shortName":"Linux","orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","dateUpdated":"2026-10-21T12:47:08.178Z"},"cpeApplicability":[{"nodes":[{"operator":"OR","negate":false,"cpeMatch":[{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"6.12","versionEndExcluding":"6.12.108"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"6.12","versionEndExcluding":"6.18.49"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"6.12","versionEndExcluding":"7.1.13"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"6.12","versionEndExcluding":"7.2.3"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"6.12","versionEndExcluding":"7.3"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"6.6.160"}]}]}],"x_generator":{"engine":"bippy-1.2.0"}}}}}