{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2024-42276","assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","state":"PUBLISHED","assignerShortName":"Linux","dateReserved":"2024-07-30T07:40:12.261Z","datePublished":"2024-08-17T09:08:44.694Z","dateUpdated":"2026-08-05T11:36:17.006Z"},"containers":{"cna":{"providerMetadata":{"orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","shortName":"Linux","dateUpdated":"2026-08-05T11:36:17.006Z"},"descriptions":[{"lang":"en","value":"In the Linux kernel, the following vulnerability has been resolved:\n\nnvme-pci: add missing condition check for existence of mapped data\n\nnvme_map_data() is called when request has physical segments, hence\nthe nvme_unmap_data() should have same condition to avoid dereference."}],"metrics":[{"cvssV3_1":{"version":"3.1","vectorString":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","baseScore":7.8,"baseSeverity":"HIGH"},"scenarios":[{"lang":"en","value":"AV:L - The flaw is in the NVMe PCI host driver's request submission path (`nvme_prep_rq`), reached only by locally submitted block I/O — ordinary filesystem/direct I/O or `NVME_IOCTL_IO_CMD`/io_uring passthrough on `/dev/nvme0n1`. There is no remote or adjacent-network path to this code.\nAC:L - The error path is entered when the metadata DMA mapping fails, which an attacker can drive by flooding concurrent I/O to exhaust swiotlb bounce-buffer slots or IOVA space (guaranteed bounce-through in confidential-compute guests or DMA-mask-limited setups), and the stale `iod` state is deterministic once the path is taken. No timing race the attacker cannot control is involved.\nPR:L - Only an unprivileged local user with access to an NVMe namespace is required — normal file I/O on a PI/metadata-formatted namespace sets `REQ_INTEGRITY` with no capability at all, and `nvme_cmd_allowed()` explicitly permits unprivileged passthrough of non-intrusive I/O commands without `CAP_SYS_ADMIN`.\nUI:N - The attacker triggers the condition entirely through its own I/O submissions; no action by another user or administrator is needed.\nS:U - The corruption is confined to kernel memory and DMA mappings managed by the same kernel security authority; no VM, IOMMU, or sandbox boundary is crossed.\nC:H - `nvme_unmap_data()` reads a stale, already-freed `iod->sgt.sgl` scatterlist, and the resulting mempool double-free lets two concurrent requests share one SGL so one request's data can be steered into another's buffers; spurious `dma_unmap_page()` of a reassigned IOVA can likewise expose unrelated memory contents to the device.\nI:H - The double `mempool_free()` of the scatterlist is a heap double-free primitive suitable for controlled heap corruption, and tearing down a DMA mapping that has been reallocated leaves the device DMA-writing into memory now owned by other subsystems — both give arbitrary-write-class integrity impact.\nA:H - The path hits `WARN_ON_ONCE()` and then unmaps DMA using garbage addresses and frees an invalid pointer, producing IOMMU faults, slab/mempool corruption, and kernel oops or panic."}]}],"affected":[{"product":"Linux","vendor":"Linux","defaultStatus":"unaffected","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/nvme/host/pci.c"],"versions":[{"version":"4aedb705437f6f98b45f45c394e6803ca67abd33","lessThan":"3f8ec1d6b0ebd8268307d52be8301973fa5a01ec","status":"affected","versionType":"git"},{"version":"4aedb705437f6f98b45f45c394e6803ca67abd33","lessThan":"be23ae63080e0bf9e246ab20207200bca6585eba","status":"affected","versionType":"git"},{"version":"4aedb705437f6f98b45f45c394e6803ca67abd33","lessThan":"7cc1f4cd90a00b6191cb8cda2d1302fdce59361c","status":"affected","versionType":"git"},{"version":"4aedb705437f6f98b45f45c394e6803ca67abd33","lessThan":"d135c3352f7c947a922da93c8e763ee6bc208b64","status":"affected","versionType":"git"},{"version":"4aedb705437f6f98b45f45c394e6803ca67abd33","lessThan":"77848b379e9f85a08048a2c8b3b4a7e8396f5f83","status":"affected","versionType":"git"},{"version":"4aedb705437f6f98b45f45c394e6803ca67abd33","lessThan":"70100fe721840bf6d8e5abd25b8bffe4d2e049b7","status":"affected","versionType":"git"},{"version":"4aedb705437f6f98b45f45c394e6803ca67abd33","lessThan":"c31fad1470389666ac7169fe43aa65bf5b7e2cfd","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/host/pci.c"],"versions":[{"version":"5.2","status":"affected"},{"version":"0","lessThan":"5.2","status":"unaffected","versionType":"semver"},{"version":"5.4.282","lessThanOrEqual":"5.4.*","status":"unaffected","versionType":"semver"},{"version":"5.10.224","lessThanOrEqual":"5.10.*","status":"unaffected","versionType":"semver"},{"version":"5.15.165","lessThanOrEqual":"5.15.*","status":"unaffected","versionType":"semver"},{"version":"6.1.103","lessThanOrEqual":"6.1.*","status":"unaffected","versionType":"semver"},{"version":"6.6.44","lessThanOrEqual":"6.6.*","status":"unaffected","versionType":"semver"},{"version":"6.10.3","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":"5.2","versionEndExcluding":"5.4.282"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.2","versionEndExcluding":"5.10.224"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.2","versionEndExcluding":"5.15.165"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.2","versionEndExcluding":"6.1.103"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.2","versionEndExcluding":"6.6.44"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.2","versionEndExcluding":"6.10.3"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.2","versionEndExcluding":"6.11"}]}]}],"references":[{"url":"https://git.kernel.org/stable/c/3f8ec1d6b0ebd8268307d52be8301973fa5a01ec"},{"url":"https://git.kernel.org/stable/c/be23ae63080e0bf9e246ab20207200bca6585eba"},{"url":"https://git.kernel.org/stable/c/7cc1f4cd90a00b6191cb8cda2d1302fdce59361c"},{"url":"https://git.kernel.org/stable/c/d135c3352f7c947a922da93c8e763ee6bc208b64"},{"url":"https://git.kernel.org/stable/c/77848b379e9f85a08048a2c8b3b4a7e8396f5f83"},{"url":"https://git.kernel.org/stable/c/70100fe721840bf6d8e5abd25b8bffe4d2e049b7"},{"url":"https://git.kernel.org/stable/c/c31fad1470389666ac7169fe43aa65bf5b7e2cfd"}],"title":"nvme-pci: 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