CVE-2026-89995

{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-89995", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2026-09-11T19:38:34.780Z", "datePublished": "2026-09-16T10:33:07.962Z", "dateUpdated": "2026-10-30T12:33:44.174Z"}, "containers": {"cna": {"providerMetadata": {"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-10-30T12:33:44.174Z"}, "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\ndma-direct: return struct page from dma_direct_alloc_from_pool()\n\nCommit 5b138c534fda (\"dma-direct: factor out a dma_direct_alloc_from_pool\nhelper\") changed dma_direct_alloc_from_pool() to return the CPU address\nfrom dma_alloc_from_pool(). That fits dma_direct_alloc(), but\ndma_direct_alloc_pages() also uses the helper and expects a struct page *.\n\nFix this by making dma_direct_alloc_from_pool() return the struct page *\nagain, and pass the CPU address back through an out-parameter for the\ndma_direct_alloc() caller."}], "metrics": [{"cvssV3_1": {"version": "3.1", "vectorString": "CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H", "baseScore": 8.8, "baseSeverity": "HIGH"}, "scenarios": [{"lang": "en", "value": "AV:A - dma_direct_alloc_pages() takes the buggy pool path from dma_alloc_noncoherent(GFP_ATOMIC) in ath11k_peer_rx_tid_setup(), which runs when a same-LAN WiFi peer associates or starts a Block Ack. On SEV/TDX/CCA guests and SME hosts, force_dma_unencrypted() is true, so a wireless attacker reaches the type confusion without a wired/Internet service.\nAC:L - The peer fully controls association and ADDBA, so the GFP_ATOMIC dma_alloc_pages() call is deterministic with no race to win. Confidential-computing dma-direct (atomic decrypted pool, no IOMMU) is the scored deployment, not an uninfluenced memory layout or rare extra config.\nPR:N - ath11k peer/TID setup and the cdns3 gadget GFP_ATOMIC dma_alloc_noncoherent() path run in kernel interrupt/softirq context with no host account, capability, or user-namespace check. An unauthenticated WiFi peer (or USB gadget host) is sufficient.\nUI:N - Peer creation and Block Ack setup are 802.11 protocol operations. Once the interface is up as an AP/hotspot or an already-associated STA, exploitation needs no victim mount, open, or other interactive step.\nS:U - The allocator returns a CPU virtual address as a struct page *, corrupting page and DMA bookkeeping in the same kernel. This is not a VM escape, IOMMU bypass, or host/guest confidential-computing boundary crossing.\nC:H - Callers treat the kernel VA as a struct page, so page_to_virt/page_address/page_to_pfn compute wrong addresses and dma_mmap_pages() can remap a bogus PFN into userspace. That type confusion is an arbitrary kernel-memory disclosure primitive.\nI:H - sg_set_page, page_address stores, dma_set_encrypted(), and dma_free_contiguous() then operate on the fake page pointer, writing, re-encrypting, or freeing the wrong memory. That is an arbitrary kernel write/free primitive usable for control-flow hijack.\nA:H - Interpreting a DMA pool virtual address as a struct page * causes invalid vmemmap/page-flag accesses and buddy frees, which oops or panic the kernel even when not fully turned into a stable read/write primitive."}]}], "affected": [{"product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["kernel/dma/direct.c"], "versions": [{"version": "5b138c534fda57c2ebc1e6de72578aa1d70788a6", "lessThan": "1ca96bbfef42bbfb139cc6eb1d940c8ca9046f95", "status": "affected", "versionType": "git"}, {"version": "5b138c534fda57c2ebc1e6de72578aa1d70788a6", "lessThan": "7801e616fbe3661f9471b2e9bfcb1ed35460bf16", "status": "affected", "versionType": "git"}, {"version": "5b138c534fda57c2ebc1e6de72578aa1d70788a6", "lessThan": "c3fdb94da43ff23287f85664174c45c45e881a3f", "status": "affected", "versionType": "git"}, {"version": "5b138c534fda57c2ebc1e6de72578aa1d70788a6", "lessThan": "408ff2d5bf555bd3f4c84a2edb95c0690bf9edc8", "status": "affected", "versionType": "git"}, {"version": "5b138c534fda57c2ebc1e6de72578aa1d70788a6", "lessThan": "feeb2ef775081a6c188cdd10e7a45369a07ce531", "status": "affected", "versionType": "git"}, {"version": "5b138c534fda57c2ebc1e6de72578aa1d70788a6", "lessThan": "94a04ad732c9f8b9554270fc4038a06737de5c22", "status": "affected", "versionType": "git"}]}, {"product": "Linux", "vendor": "Linux", "defaultStatus": "affected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["kernel/dma/direct.c"], "versions": [{"version": "5.10", "status": "affected"}, {"version": "0", "lessThan": "5.10", "status": "unaffected", "versionType": "semver"}, {"version": "6.1.191", "lessThanOrEqual": "6.1.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.6.160", "lessThanOrEqual": "6.6.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.12.110", "lessThanOrEqual": "6.12.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.18.51", "lessThanOrEqual": "6.18.*", "status": "unaffected", "versionType": "semver"}, {"version": "7.2.5", "lessThanOrEqual": "7.2.*", "status": "unaffected", "versionType": "semver"}, {"version": "7.3", "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": "5.10", "versionEndExcluding": "6.1.191"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.10", "versionEndExcluding": "6.6.160"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.10", "versionEndExcluding": "6.12.110"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.10", "versionEndExcluding": "6.18.51"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.10", "versionEndExcluding": "7.2.5"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.10", "versionEndExcluding": "7.3"}]}]}], "references": [{"url": "https://git.kernel.org/stable/c/1ca96bbfef42bbfb139cc6eb1d940c8ca9046f95"}, {"url": "https://git.kernel.org/stable/c/7801e616fbe3661f9471b2e9bfcb1ed35460bf16"}, {"url": "https://git.kernel.org/stable/c/c3fdb94da43ff23287f85664174c45c45e881a3f"}, {"url": "https://git.kernel.org/stable/c/408ff2d5bf555bd3f4c84a2edb95c0690bf9edc8"}, {"url": "https://git.kernel.org/stable/c/feeb2ef775081a6c188cdd10e7a45369a07ce531"}, {"url": "https://git.kernel.org/stable/c/94a04ad732c9f8b9554270fc4038a06737de5c22"}], "title": "dma-direct: return struct page from dma_direct_alloc_from_pool()", "x_generator": {"engine": "bippy-1.2.0"}}}}

{}

{"affected": [{"affectedData": [{"defaultStatus": "unaffected", "product": "Linux", "programFiles": ["kernel/dma/direct.c"], "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "versions": [{"lessThan": "1ca96bbfef42bbfb139cc6eb1d940c8ca9046f95", "status": "affected", "version": "5b138c534fda57c2ebc1e6de72578aa1d70788a6", "versionType": "git"}, {"lessThan": "7801e616fbe3661f9471b2e9bfcb1ed35460bf16", "status": "affected", "version": "5b138c534fda57c2ebc1e6de72578aa1d70788a6", "versionType": "git"}, {"lessThan": "c3fdb94da43ff23287f85664174c45c45e881a3f", "status": "affected", "version": "5b138c534fda57c2ebc1e6de72578aa1d70788a6", "versionType": "git"}, {"lessThan": "408ff2d5bf555bd3f4c84a2edb95c0690bf9edc8", "status": "affected", "version": "5b138c534fda57c2ebc1e6de72578aa1d70788a6", "versionType": "git"}, {"lessThan": "feeb2ef775081a6c188cdd10e7a45369a07ce531", "status": "affected", "version": "5b138c534fda57c2ebc1e6de72578aa1d70788a6", "versionType": "git"}, {"lessThan": "94a04ad732c9f8b9554270fc4038a06737de5c22", "status": "affected", "version": "5b138c534fda57c2ebc1e6de72578aa1d70788a6", "versionType": "git"}]}, {"defaultStatus": "affected", "product": "Linux", "programFiles": ["kernel/dma/direct.c"], "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "versions": [{"status": "affected", "version": "5.10"}, {"lessThan": "5.10", "status": "unaffected", "version": "0", "versionType": "semver"}, {"lessThanOrEqual": "6.1.*", "status": "unaffected", "version": "6.1.191", "versionType": "semver"}, {"lessThanOrEqual": "6.6.*", "status": "unaffected", "version": "6.6.160", "versionType": "semver"}, {"lessThanOrEqual": "6.12.*", "status": "unaffected", "version": "6.12.110", "versionType": "semver"}, {"lessThanOrEqual": "6.18.*", "status": "unaffected", "version": "6.18.51", "versionType": "semver"}, {"lessThanOrEqual": "7.2.*", "status": "unaffected", "version": "7.2.5", "versionType": "semver"}, {"lessThanOrEqual": "*", "status": "unaffected", "version": "7.3", "versionType": "original_commit_for_fix"}]}], "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}], "cveTags": [], "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\ndma-direct: return struct page from dma_direct_alloc_from_pool()\n\nCommit 5b138c534fda (\"dma-direct: factor out a dma_direct_alloc_from_pool\nhelper\") changed dma_direct_alloc_from_pool() to return the CPU address\nfrom dma_alloc_from_pool(). That fits dma_direct_alloc(), but\ndma_direct_alloc_pages() also uses the helper and expects a struct page *.\n\nFix this by making dma_direct_alloc_from_pool() return the struct page *\nagain, and pass the CPU address back through an out-parameter for the\ndma_direct_alloc() caller."}], "id": "CVE-2026-89995", "lastModified": "2026-10-30T13:20:38.167", "metrics": {"cvssMetricV31": [{"cvssData": {"attackComplexity": "LOW", "attackVector": "ADJACENT_NETWORK", "availabilityImpact": "HIGH", "baseScore": 8.8, "baseSeverity": "HIGH", "confidentialityImpact": "HIGH", "integrityImpact": "HIGH", "privilegesRequired": "NONE", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H", "version": "3.1"}, "exploitabilityScore": 2.8, "impactScore": 5.9, "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "type": "Secondary"}]}, "published": "2026-09-16T11:17:10.707", "references": [{"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/1ca96bbfef42bbfb139cc6eb1d940c8ca9046f95"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/408ff2d5bf555bd3f4c84a2edb95c0690bf9edc8"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/7801e616fbe3661f9471b2e9bfcb1ed35460bf16"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/94a04ad732c9f8b9554270fc4038a06737de5c22"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/c3fdb94da43ff23287f85664174c45c45e881a3f"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/feeb2ef775081a6c188cdd10e7a45369a07ce531"}], "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "vulnStatus": "Received"}

{}

{"affected": [{"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[5b138c534fda57c2ebc1e6de72578aa1d70788a6,c3fdb94da43ff23287f85664174c45c45e881a3f)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[5b138c534fda57c2ebc1e6de72578aa1d70788a6,408ff2d5bf555bd3f4c84a2edb95c0690bf9edc8)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[5b138c534fda57c2ebc1e6de72578aa1d70788a6,feeb2ef775081a6c188cdd10e7a45369a07ce531)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[5b138c534fda57c2ebc1e6de72578aa1d70788a6,94a04ad732c9f8b9554270fc4038a06737de5c22)"}}], "enrichment": {"confidence": 99.0, "confidence_source": "inferred", "scores": [{"score": 99.0, "source": "inferred"}, {"score": 100.0, "source": "matching"}]}, "original": {"product": "Linux", "source": "cna", "vendor": "Linux"}, "product": "linux_kernel", "vendor": "linux"}, {"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "generic", "value": "5.10"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "generic", "value": "[0,5.10)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[6.12.110,6.13.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[6.18.51,6.19.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[7.2.5,7.3.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[7.3-rc1,*]"}}], "enrichment": {"confidence": 99.0, "confidence_source": "inferred", "scores": [{"score": 99.0, "source": "inferred"}, {"score": 100.0, "source": "matching"}]}, "original": {"product": "Linux", "source": "cna", "vendor": "Linux"}, "product": "linux_kernel", "vendor": "linux"}], "created": "2026-09-16T23:30:13.621498+00:00", "updated": "2026-09-18T05:00:04.142073+00:00", "vendors": ["linux", "linux$PRODUCT$linux_kernel"], "weaknesses": ["CWE-665"]}