{ "dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": { "cveId": "CVE-2026-74279", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2026-08-15T05:44:03.880Z", "datePublished": "2026-08-15T05:57:50.131Z", "dateUpdated": "2026-08-17T05:45:20.085Z" }, "containers": { "cna": { "providerMetadata": { "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-08-17T05:45:20.085Z" }, "descriptions": [ { "lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\ncrypto: cavium/cpt - fix DMA cleanup using wrong loop index\n\nThe sg_cleanup error path used list[i] instead of list[j] when unmapping\nDMA buffers, leaking successfully mapped entries and repeatedly unmapping\nthe failed one." } ], "metrics": [ { "cvssV3_1": { "version": "3.1", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H", "baseScore": 10, "baseSeverity": "CRITICAL" }, "scenarios": [ { "lang": "en", "value": "AV:N - On Cavium Thunder appliances the CPT VF skcipher driver is selected for in-kernel crypto on network-facing workloads (IPsec/xfrm ESP decrypt, NFS/RPC GSS-Kerberos), so remote peers can drive setup_sgio_components() by sending traffic that triggers hardware-accelerated AES/DES operations.\nAC:L - An attacker can reliably force the error path by fragmenting crypto buffers to raise incnt/outcnt and flooding concurrent encrypt/decrypt requests to exhaust IOMMU IOVAs, causing dma_map_single() to fail mid-loop; no uncontrollable victim state or race is required.\nPR:N - Exploitation requires no root or capabilities on the victim host; remote network peers sending IPsec or authenticated RPC traffic, or any local process using the kernel crypto API via AF_ALG sockets, can trigger the faulty DMA cleanup without admin privileges.\nUI:N - Exploitation is fully attacker-driven through automated network traffic or programmatic crypto requests and does not require any victim user action such as opening files or mounting filesystems.\nS:C - Leaked DMA mappings let the CPT PCI function continue bus-mastering kernel pages after software teardown, bypassing intended kernel DMA lifecycle and IOMMU-enforced device isolation boundaries when stale mappings target freed or repurposed memory.\nC:H - Unmapping failures leave active DMA translations while dma_addr metadata is cleared, allowing the CPT hardware to read kernel memory from freed or reallocated pages, providing a memory-corruption primitive that can disclose sensitive data.\nI:H - Stale bidirectional DMA mappings combined with bogus unmaps on DMA_MAPPING_ERROR can corrupt IOMMU state and let the accelerator write into kernel pages no longer owned by the request, enabling control of kernel memory contents.\nA:H - Repeated dma_unmap_single() on DMA_MAPPING_ERROR triggers WARN_ON in iommu_dma_unmap_phys, and accumulating leaked IOMMU mappings can exhaust DMA resources or panic the kernel during subsequent crypto operations." } ] } ], "affected": [ { "product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": [ "drivers/crypto/cavium/cpt/cptvf_reqmanager.c" ], "versions": [ { "version": "c694b233295b99c33dd5ac28aede9f171f5a6862", "lessThan": "23c6174e48f66fc10b998b0acdb406cb0caf5c80", "status": "affected", "versionType": "git" }, { "version": "c694b233295b99c33dd5ac28aede9f171f5a6862", "lessThan": "23d3a7e896a1fe2d7a6bcb42f093948b79f8a198", "status": "affected", "versionType": "git" }, { "version": "c694b233295b99c33dd5ac28aede9f171f5a6862", "lessThan": "28141f95ae93b18f9bfde953cb787fcb151fb9da", "status": "affected", "versionType": "git" }, { "version": "c694b233295b99c33dd5ac28aede9f171f5a6862", "lessThan": "8afd1007ef79898a6e010eaade97097e49405fce", "status": "affected", "versionType": "git" }, { "version": "c694b233295b99c33dd5ac28aede9f171f5a6862", "lessThan": "3b8a1e1f4e4071a62b20374028744e8cc8310d48", "status": "affected", "versionType": "git" }, { "version": "c694b233295b99c33dd5ac28aede9f171f5a6862", "lessThan": "fb4d57b83356d4bd411b45ede3024e0ff42c9b5e", "status": "affected", "versionType": "git" }, { "version": "c694b233295b99c33dd5ac28aede9f171f5a6862", "lessThan": "d319b83b97b3585550d9ae592dfa78c755b6129e", "status": "affected", "versionType": "git" }, { "version": "c694b233295b99c33dd5ac28aede9f171f5a6862", "lessThan": "9dbf173bd32d5f81b005008b682bfb50aa093455", "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/crypto/cavium/cpt/cptvf_reqmanager.c" ], "versions": [ { "version": "4.11", "status": "affected" }, { "version": "0", "lessThan": "4.11", "status": "unaffected", "versionType": "semver" }, { "version": "5.10.261", "lessThanOrEqual": "5.10.*", "status": "unaffected", "versionType": "semver" }, { "version": "5.15.212", "lessThanOrEqual": "5.15.*", "status": "unaffected", "versionType": "semver" }, { "version": "6.1.178", "lessThanOrEqual": "6.1.*", "status": "unaffected", "versionType": "semver" }, { "version": "6.6.145", "lessThanOrEqual": "6.6.*", "status": "unaffected", "versionType": "semver" }, { "version": "6.12.97", "lessThanOrEqual": "6.12.*", "status": "unaffected", "versionType": "semver" }, { "version": "6.18.40", "lessThanOrEqual": "6.18.*", "status": "unaffected", "versionType": "semver" }, { "version": "7.1.5", "lessThanOrEqual": "7.1.*", "status": "unaffected", "versionType": "semver" }, { "version": "7.2", "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": "4.11", "versionEndExcluding": "5.10.261" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.11", "versionEndExcluding": "5.15.212" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.11", "versionEndExcluding": "6.1.178" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.11", "versionEndExcluding": "6.6.145" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.11", "versionEndExcluding": "6.12.97" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.11", "versionEndExcluding": "6.18.40" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.11", "versionEndExcluding": "7.1.5" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.11", "versionEndExcluding": "7.2" } ] } ] } ], "references": [ { "url": "https://git.kernel.org/stable/c/23c6174e48f66fc10b998b0acdb406cb0caf5c80" }, { "url": "https://git.kernel.org/stable/c/23d3a7e896a1fe2d7a6bcb42f093948b79f8a198" }, { "url": "https://git.kernel.org/stable/c/28141f95ae93b18f9bfde953cb787fcb151fb9da" }, { "url": "https://git.kernel.org/stable/c/8afd1007ef79898a6e010eaade97097e49405fce" }, { "url": "https://git.kernel.org/stable/c/3b8a1e1f4e4071a62b20374028744e8cc8310d48" }, { "url": "https://git.kernel.org/stable/c/fb4d57b83356d4bd411b45ede3024e0ff42c9b5e" }, { "url": "https://git.kernel.org/stable/c/d319b83b97b3585550d9ae592dfa78c755b6129e" }, { "url": "https://git.kernel.org/stable/c/9dbf173bd32d5f81b005008b682bfb50aa093455" } ], "title": "crypto: cavium/cpt - fix DMA cleanup using wrong loop index", "x_generator": { "engine": "bippy-1.2.0" } } } }