{"id":"CVE-2023-52454","state":"PUBLISHED","title":"nvmet-tcp: Fix a kernel panic when host sends an invalid H2C PDU length","description":"In the Linux kernel, the following vulnerability has been resolved:\n\nnvmet-tcp: Fix a kernel panic when host sends an invalid H2C PDU length\n\nIf the host sends an H2CData command with an invalid DATAL,\nthe kernel may crash in nvmet_tcp_build_pdu_iovec().\n\nUnable to handle kernel NULL pointer dereference at\nvirtual address 0000000000000000\nlr : nvmet_tcp_io_work+0x6ac/0x718 [nvmet_tcp]\nCall trace:\n  process_one_work+0x174/0x3c8\n  worker_thread+0x2d0/0x3e8\n  kthread+0x104/0x110\n\nFix the bug by raising a fatal error if DATAL isn't coherent\nwith the packet size.\nAlso, the PDU length should never exceed the MAXH2CDATA parameter which\nhas been communicated to the host in nvmet_tcp_handle_icreq().","publishedAt":"2024-02-23T14:46:17.827Z","updatedAt":"2026-08-05T09:10:04.196Z","severity":{"score":7.5,"label":"High","version":"3.1","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","source":"Linux"},"assigner":"Linux","products":["Linux Linux"],"affected":[{"vendor":"Linux","product":"Linux","defaultStatus":"unaffected","versions":[{"version":"872d26a391da92ed8f0c0f5cb5fef428067b7f30","status":"affected","lessThan":"ee5e7632e981673f42a50ade25e71e612e543d9d","versionType":"git"},{"version":"872d26a391da92ed8f0c0f5cb5fef428067b7f30","status":"affected","lessThan":"f775f2621c2ac5cc3a0b3a64665dad4fb146e510","versionType":"git"},{"version":"872d26a391da92ed8f0c0f5cb5fef428067b7f30","status":"affected","lessThan":"4cb3cf7177ae3666be7fb27d4ad4d72a295fb02d","versionType":"git"},{"version":"872d26a391da92ed8f0c0f5cb5fef428067b7f30","status":"affected","lessThan":"2871aa407007f6f531fae181ad252486e022df42","versionType":"git"},{"version":"872d26a391da92ed8f0c0f5cb5fef428067b7f30","status":"affected","lessThan":"24e05760186dc070d3db190ca61efdbce23afc88","versionType":"git"},{"version":"872d26a391da92ed8f0c0f5cb5fef428067b7f30","status":"affected","lessThan":"70154e8d015c9b4fb56c1a2ef1fc8b83d45c7f68","versionType":"git"},{"version":"872d26a391da92ed8f0c0f5cb5fef428067b7f30","status":"affected","lessThan":"efa56305908ba20de2104f1b8508c6a7401833be","versionType":"git"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/nvme/target/tcp.c"]},{"vendor":"Linux","product":"Linux","defaultStatus":"affected","versions":[{"version":"5.0","status":"affected"},{"version":"0","status":"unaffected","lessThan":"5.0","versionType":"semver"},{"version":"5.4.268","status":"unaffected","lessThanOrEqual":"5.4.*","versionType":"semver"},{"version":"5.10.209","status":"unaffected","lessThanOrEqual":"5.10.*","versionType":"semver"},{"version":"5.15.148","status":"unaffected","lessThanOrEqual":"5.15.*","versionType":"semver"},{"version":"6.1.75","status":"unaffected","lessThanOrEqual":"6.1.*","versionType":"semver"},{"version":"6.6.14","status":"unaffected","lessThanOrEqual":"6.6.*","versionType":"semver"},{"version":"6.7.2","status":"unaffected","lessThanOrEqual":"6.7.*","versionType":"semver"},{"version":"6.8","status":"unaffected","lessThanOrEqual":"*","versionType":"original_commit_for_fix"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/nvme/target/tcp.c"]}],"references":["https://git.kernel.org/stable/c/ee5e7632e981673f42a50ade25e71e612e543d9d","https://git.kernel.org/stable/c/f775f2621c2ac5cc3a0b3a64665dad4fb146e510","https://git.kernel.org/stable/c/4cb3cf7177ae3666be7fb27d4ad4d72a295fb02d","https://git.kernel.org/stable/c/2871aa407007f6f531fae181ad252486e022df42","https://git.kernel.org/stable/c/24e05760186dc070d3db190ca61efdbce23afc88","https://git.kernel.org/stable/c/70154e8d015c9b4fb56c1a2ef1fc8b83d45c7f68","https://git.kernel.org/stable/c/efa56305908ba20de2104f1b8508c6a7401833be","https://lists.debian.org/debian-lts-announce/2024/06/msg00016.html"],"weaknesses":[],"ingestedAt":"2026-10-29T20:06:33.064Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2023/52xxx/CVE-2023-52454.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2023-52454","state":"PUBLISHED","datePublished":"2024-02-23T14:46:17.827Z","dateUpdated":"2026-08-05T09:10:04.196Z","assignerShortName":"Linux","assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","dateReserved":"2024-02-20T12:30:33.293Z"},"containers":{"cna":{"title":"nvmet-tcp: Fix a kernel panic when host sends an invalid H2C PDU length","descriptions":[{"lang":"en","value":"In the Linux kernel, the following vulnerability has been resolved:\n\nnvmet-tcp: Fix a kernel panic when host sends an invalid H2C PDU length\n\nIf the host sends an H2CData command with an invalid DATAL,\nthe kernel may crash in nvmet_tcp_build_pdu_iovec().\n\nUnable to handle kernel NULL pointer dereference at\nvirtual address 0000000000000000\nlr : nvmet_tcp_io_work+0x6ac/0x718 [nvmet_tcp]\nCall trace:\n  process_one_work+0x174/0x3c8\n  worker_thread+0x2d0/0x3e8\n  kthread+0x104/0x110\n\nFix the bug by raising a fatal error if DATAL isn't coherent\nwith the packet size.\nAlso, the PDU length should never exceed the MAXH2CDATA parameter which\nhas been communicated to the host in nvmet_tcp_handle_icreq()."}],"affected":[{"vendor":"Linux","product":"Linux","defaultStatus":"unaffected","versions":[{"version":"872d26a391da92ed8f0c0f5cb5fef428067b7f30","status":"affected","lessThan":"ee5e7632e981673f42a50ade25e71e612e543d9d","versionType":"git"},{"version":"872d26a391da92ed8f0c0f5cb5fef428067b7f30","status":"affected","lessThan":"f775f2621c2ac5cc3a0b3a64665dad4fb146e510","versionType":"git"},{"version":"872d26a391da92ed8f0c0f5cb5fef428067b7f30","status":"affected","lessThan":"4cb3cf7177ae3666be7fb27d4ad4d72a295fb02d","versionType":"git"},{"version":"872d26a391da92ed8f0c0f5cb5fef428067b7f30","status":"affected","lessThan":"2871aa407007f6f531fae181ad252486e022df42","versionType":"git"},{"version":"872d26a391da92ed8f0c0f5cb5fef428067b7f30","status":"affected","lessThan":"24e05760186dc070d3db190ca61efdbce23afc88","versionType":"git"},{"version":"872d26a391da92ed8f0c0f5cb5fef428067b7f30","status":"affected","lessThan":"70154e8d015c9b4fb56c1a2ef1fc8b83d45c7f68","versionType":"git"},{"version":"872d26a391da92ed8f0c0f5cb5fef428067b7f30","status":"affected","lessThan":"efa56305908ba20de2104f1b8508c6a7401833be","versionType":"git"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/nvme/target/tcp.c"]},{"vendor":"Linux","product":"Linux","defaultStatus":"affected","versions":[{"version":"5.0","status":"affected"},{"version":"0","status":"unaffected","lessThan":"5.0","versionType":"semver"},{"version":"5.4.268","status":"unaffected","lessThanOrEqual":"5.4.*","versionType":"semver"},{"version":"5.10.209","status":"unaffected","lessThanOrEqual":"5.10.*","versionType":"semver"},{"version":"5.15.148","status":"unaffected","lessThanOrEqual":"5.15.*","versionType":"semver"},{"version":"6.1.75","status":"unaffected","lessThanOrEqual":"6.1.*","versionType":"semver"},{"version":"6.6.14","status":"unaffected","lessThanOrEqual":"6.6.*","versionType":"semver"},{"version":"6.7.2","status":"unaffected","lessThanOrEqual":"6.7.*","versionType":"semver"},{"version":"6.8","status":"unaffected","lessThanOrEqual":"*","versionType":"original_commit_for_fix"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/nvme/target/tcp.c"]}],"references":[{"url":"https://git.kernel.org/stable/c/ee5e7632e981673f42a50ade25e71e612e543d9d"},{"url":"https://git.kernel.org/stable/c/f775f2621c2ac5cc3a0b3a64665dad4fb146e510"},{"url":"https://git.kernel.org/stable/c/4cb3cf7177ae3666be7fb27d4ad4d72a295fb02d"},{"url":"https://git.kernel.org/stable/c/2871aa407007f6f531fae181ad252486e022df42"},{"url":"https://git.kernel.org/stable/c/24e05760186dc070d3db190ca61efdbce23afc88"},{"url":"https://git.kernel.org/stable/c/70154e8d015c9b4fb56c1a2ef1fc8b83d45c7f68"},{"url":"https://git.kernel.org/stable/c/efa56305908ba20de2104f1b8508c6a7401833be"}],"metrics":[{"cvssV3_1":{"version":"3.1","vectorString":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","baseScore":7.5,"baseSeverity":"HIGH"},"scenarios":[{"lang":"en","value":"AV:N - nvmet-tcp is an NVMe-over-TCP target that listens on a TCP port and processes H2CData PDUs from remote initiators via nvmet_tcp_data_ready → nvmet_tcp_io_work → nvmet_tcp_handle_h2c_data_pdu.\nAC:L - The attacker deterministically triggers the bug by sending an H2CData PDU with an invalid DATAL (incoherent with plen, zero, or oversized); no race or attacker-independent condition is required.\nPR:N - H2CData is accepted after the unauthenticated ICREQ/ICRESP handshake, before Connect host-NQN checks or optional DH-HMAC-CHAP, so an unauthenticated network peer can reach the vulnerable handler.\nUI:N - Exploitation requires only crafted NVMe/TCP PDUs to the listening target; no local user or administrator action is needed.\nS:U - The NULL dereference crashes the kernel running the nvmet-tcp target; impact stays within that system's security authority with no VM/IOMMU/sandbox boundary crossing.\nC:N - The documented failure is a NULL pointer dereference at address 0 in nvmet_tcp_build_pdu_iovec(); there is no out-of-bounds read or other information-disclosure primitive.\nI:N - The bug is a NULL pointer read that oopses before any OOB write or control-flow hijack; it does not provide an arbitrary write primitive.\nA:H - The NULL dereference in the nvmet-tcp workqueue path produces a kernel oops/panic, and a remote peer can repeat the trigger to deny service."}]}],"providerMetadata":{"shortName":"Linux","orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","dateUpdated":"2026-08-05T09:10:04.196Z"},"cpeApplicability":[{"nodes":[{"operator":"OR","negate":false,"cpeMatch":[{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.0","versionEndExcluding":"5.4.268"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.0","versionEndExcluding":"5.10.209"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.0","versionEndExcluding":"5.15.148"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.0","versionEndExcluding":"6.1.75"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.0","versionEndExcluding":"6.6.14"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.0","versionEndExcluding":"6.7.2"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.0","versionEndExcluding":"6.8"}]}]}],"x_generator":{"engine":"bippy-1.2.0"}},"adp":[{"title":"CISA ADP Vulnrichment","metrics":[{"other":{"type":"ssvc","content":{"id":"CVE-2023-52454","role":"CISA Coordinator","options":[{"Exploitation":"none"},{"Automatable":"no"},{"Technical Impact":"partial"}],"version":"2.0.3","timestamp":"2024-02-26T14:16:59.030675Z"}}}],"providerMetadata":{"shortName":"CISA-ADP","orgId":"134c704f-9b21-4f2e-91b3-4a467353bcc0","dateUpdated":"2024-06-04T17:23:40.242Z"}},{"title":"CVE Program Container","references":[{"url":"https://git.kernel.org/stable/c/ee5e7632e981673f42a50ade25e71e612e543d9d","tags":["x_transferred"]},{"url":"https://git.kernel.org/stable/c/f775f2621c2ac5cc3a0b3a64665dad4fb146e510","tags":["x_transferred"]},{"url":"https://git.kernel.org/stable/c/4cb3cf7177ae3666be7fb27d4ad4d72a295fb02d","tags":["x_transferred"]},{"url":"https://git.kernel.org/stable/c/2871aa407007f6f531fae181ad252486e022df42","tags":["x_transferred"]},{"url":"https://git.kernel.org/stable/c/24e05760186dc070d3db190ca61efdbce23afc88","tags":["x_transferred"]},{"url":"https://git.kernel.org/stable/c/70154e8d015c9b4fb56c1a2ef1fc8b83d45c7f68","tags":["x_transferred"]},{"url":"https://git.kernel.org/stable/c/efa56305908ba20de2104f1b8508c6a7401833be","tags":["x_transferred"]},{"url":"https://lists.debian.org/debian-lts-announce/2024/06/msg00016.html","tags":["x_transferred"]}],"providerMetadata":{"shortName":"CVE","orgId":"af854a3a-2127-422b-91ae-364da2661108","dateUpdated":"2024-08-02T23:03:19.623Z"}}]}}}