{ "dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": { "cveId": "CVE-2024-46737", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2024-09-11T15:12:18.257Z", "datePublished": "2024-09-18T07:11:59.300Z", "dateUpdated": "2026-08-05T11:38:13.852Z" }, "containers": { "cna": { "providerMetadata": { "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-08-05T11:38:13.852Z" }, "descriptions": [ { "lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nnvmet-tcp: fix kernel crash if commands allocation fails\n\nIf the commands allocation fails in nvmet_tcp_alloc_cmds()\nthe kernel crashes in nvmet_tcp_release_queue_work() because of\na NULL pointer dereference.\n\n nvmet: failed to install queue 0 cntlid 1 ret 6\n Unable to handle kernel NULL pointer dereference at\n virtual address 0000000000000008\n\nFix the bug by setting queue->nr_cmds to zero in case\nnvmet_tcp_alloc_cmd() fails." } ], "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 - The vulnerable code is `nvmet_tcp_install_queue()` in the NVMe-over-TCP target driver, reached directly from an NVMe Fabrics Connect capsule received on the target's listening TCP socket (default port 4420). A remote initiator anywhere on the network triggers it with ordinary NVMe/TCP protocol traffic.\nAC:L - The attacker deterministically forces the allocation failure by setting `sqsize` in the admin Connect command, which since commit 143667ee9a9c is unbounded for qid 0, making `kcalloc(131072, sizeof(struct nvmet_tcp_cmd))` exceed MAX_PAGE_ORDER and return NULL every time; on older branches the same is achieved with parallel max-size connections. No race, no memory-layout condition, and no state outside the attacker's control is involved.\nPR:N - `nvmet_install_queue()` runs inside the admin Connect handler before any DH-HMAC-CHAP authentication exchange, and `nvmet_host_allowed()` returns true unconditionally for the discovery subsystem exposed by every nvmet-tcp port. An entirely unauthenticated remote peer with TCP reachability can drive the path.\nUI:N - The crash is triggered purely by attacker-sent NVMe/TCP capsules followed by closing the connection. No action by any local user or administrator is required.\nS:U - The NULL dereference occurs in a kernel workqueue context and its impact is confined to the kernel on the target host, with no crossing into another security authority such as a hypervisor or IOMMU boundary.\nC:N - The fault is a read of `cmd->req.cmd` at fixed address NULL+0x8 that oopses on the very first loop iteration; a remote TCP peer has no means to map the zero page, so no kernel data is read back or disclosed to the attacker.\nI:N - Execution stops at the faulting read before reaching the later `nvmet_tcp_free_cmd_buffers()` stores, and the dereferenced address is a fixed unmapped low address rather than attacker-controlled memory, so nothing is modified or corrupted.\nA:H - The result is a kernel NULL pointer dereference oops in the `nvmet_tcp_wq` kworker — a full panic on systems with `panic_on_oops` — repeatable at will by an unauthenticated remote attacker, and each attempt additionally leaks the queue allocation, socket file reference and IDA index." } ] } ], "affected": [ { "product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": [ "drivers/nvme/target/tcp.c" ], "versions": [ { "version": "872d26a391da92ed8f0c0f5cb5fef428067b7f30", "lessThan": "03e1fd0327fa5e2174567f5fe9290fe21d21b8f4", "status": "affected", "versionType": "git" }, { "version": "872d26a391da92ed8f0c0f5cb5fef428067b7f30", "lessThan": "50632b877ce55356f5d276b9add289b1e7ddc683", "status": "affected", "versionType": "git" }, { "version": "872d26a391da92ed8f0c0f5cb5fef428067b7f30", "lessThan": "91dad30c5607e62864f888e735d0965567827bdf", "status": "affected", "versionType": "git" }, { "version": "872d26a391da92ed8f0c0f5cb5fef428067b7f30", "lessThan": "7957c731fc2b23312f8935812dee5a0b14b04e2d", "status": "affected", "versionType": "git" }, { "version": "872d26a391da92ed8f0c0f5cb5fef428067b7f30", "lessThan": "489f2913a63f528cfe3f21722583fb981967ecda", "status": "affected", "versionType": "git" }, { "version": "872d26a391da92ed8f0c0f5cb5fef428067b7f30", "lessThan": "6c04d1e3ab22cc5394ef656429638a5947f87244", "status": "affected", "versionType": "git" }, { "version": "872d26a391da92ed8f0c0f5cb5fef428067b7f30", "lessThan": "5572a55a6f830ee3f3a994b6b962a5c327d28cb3", "status": "affected", "versionType": "git" } ] }, { "product": "Linux", "vendor": "Linux", "defaultStatus": "affected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": [ "drivers/nvme/target/tcp.c" ], "versions": [ { "version": "5.0", "status": "affected" }, { "version": "0", "lessThan": "5.0", "status": "unaffected", "versionType": "semver" }, { "version": "5.4.284", "lessThanOrEqual": "5.4.*", "status": "unaffected", "versionType": "semver" }, { "version": "5.10.226", "lessThanOrEqual": "5.10.*", "status": "unaffected", "versionType": "semver" }, { "version": "5.15.167", "lessThanOrEqual": "5.15.*", "status": "unaffected", "versionType": "semver" }, { "version": "6.1.110", "lessThanOrEqual": "6.1.*", "status": "unaffected", "versionType": "semver" }, { "version": "6.6.51", "lessThanOrEqual": "6.6.*", "status": "unaffected", "versionType": "semver" }, { "version": "6.10.10", "lessThanOrEqual": "6.10.*", "status": "unaffected", "versionType": "semver" }, { "version": "6.11", "lessThanOrEqual": "*", "status": "unaffected", "versionType": "original_commit_for_fix" } ] } ], "cpeApplicability": [ { "nodes": [ { "operator": "OR", "negate": false, "cpeMatch": [ { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.0", "versionEndExcluding": "5.4.284" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.0", "versionEndExcluding": "5.10.226" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.0", "versionEndExcluding": "5.15.167" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.0", "versionEndExcluding": "6.1.110" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.0", "versionEndExcluding": "6.6.51" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.0", "versionEndExcluding": "6.10.10" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.0", "versionEndExcluding": "6.11" } ] } ] } ], "references": [ { "url": "https://git.kernel.org/stable/c/03e1fd0327fa5e2174567f5fe9290fe21d21b8f4" }, { "url": "https://git.kernel.org/stable/c/50632b877ce55356f5d276b9add289b1e7ddc683" }, { "url": "https://git.kernel.org/stable/c/91dad30c5607e62864f888e735d0965567827bdf" }, { "url": "https://git.kernel.org/stable/c/7957c731fc2b23312f8935812dee5a0b14b04e2d" }, { "url": "https://git.kernel.org/stable/c/489f2913a63f528cfe3f21722583fb981967ecda" }, { "url": "https://git.kernel.org/stable/c/6c04d1e3ab22cc5394ef656429638a5947f87244" }, { "url": "https://git.kernel.org/stable/c/5572a55a6f830ee3f3a994b6b962a5c327d28cb3" } ], "title": "nvmet-tcp: fix kernel crash if commands allocation fails", "x_generator": { "engine": "bippy-1.2.0" } }, "adp": [ { "metrics": [ { "other": { "type": "ssvc", "content": { "timestamp": "2024-09-29T14:52:30.516681Z", "id": "CVE-2024-46737", "options": [ { "Exploitation": "none" }, { "Automatable": "no" }, { "Technical Impact": "partial" } ], "role": "CISA Coordinator", "version": "2.0.3" } } } ], "title": "CISA ADP Vulnrichment", "providerMetadata": { "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "shortName": "CISA-ADP", "dateUpdated": "2024-09-29T14:52:46.426Z" } }, { "title": "CVE Program Container", "references": [ { "url": "https://lists.debian.org/debian-lts-announce/2025/01/msg00001.html" }, { "url": "https://lists.debian.org/debian-lts-announce/2024/10/msg00003.html" } ], "providerMetadata": { "orgId": "af854a3a-2127-422b-91ae-364da2661108", "shortName": "CVE", "dateUpdated": "2025-11-03T22:17:20.599Z" } } ] } }