{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-98254", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2026-09-25T10:25:14.331Z", "datePublished": "2026-10-06T08:45:20.736Z", "dateUpdated": "2026-10-06T08:45:20.736Z"}, "containers": {"cna": {"providerMetadata": {"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-10-06T08:45:20.736Z"}, "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nswiotlb: use the adjusted address for the highmem page lookup\n\nswiotlb_bounce() reads the page frame number from the slot's recorded\norig_addr, then advances orig_addr by tlb_offset to reach the address\nthe caller asked about. The highmem branch mixes the two: the offset\nwithin the page comes from the adjusted address, the page from the value\nbefore it.\n\nOnce the adjustment crosses a page boundary the pair no longer describes\none location, and the whole copy lands one page below the intended one\nfor a positive tlb_offset, one above for a negative one. DMA_FROM_DEVICE\nwrites the device data over the wrong page and leaves the intended one\nstale, DMA_TO_DEVICE feeds the device from a page the mapping may not\ncover. Partial syncs through dma_sync_single_range_for_*() are what make\ntlb_offset non-zero.\n\nThe branch test is picked the same way, so a slot recorded in lowmem can\nbe adjusted into highmem and the lowmem path then hands a highmem\naddress to phys_to_virt().\n\nTake both from orig_addr once it is final and keep pfn in the branch\nthat uses it. PhysHighMem() asks the question straight from the address,\nas dma-debug already does."}], "affected": [{"product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["kernel/dma/swiotlb.c"], "versions": [{"version": "5f89468e2f060031cd89fd4287298e0eaf246bf6", "lessThan": "6e53b4d6afbde626255805d438cabb1cac482445", "status": "affected", "versionType": "git"}, {"version": "5f89468e2f060031cd89fd4287298e0eaf246bf6", "lessThan": "aa4709813b29db89f2307f968db5d24925dcdeb1", "status": "affected", "versionType": "git"}, {"version": "5f89468e2f060031cd89fd4287298e0eaf246bf6", "lessThan": "0219b72f5c209732b2f03a8cc0d7240b5e428a99", "status": "affected", "versionType": "git"}, {"version": "5f89468e2f060031cd89fd4287298e0eaf246bf6", "lessThan": "b7d7914a9ae3097e63d113007e4fb44d33d515b1", "status": "affected", "versionType": "git"}, {"version": "e6108147dd91b94d1979b110f265710c254c99d5", "status": "affected", "versionType": "git"}, {"version": "e77b796eb9b7ca3c1c0d574d0c155f55b59ca8d5", "status": "affected", "versionType": "git"}, {"version": "5.10.47", "lessThan": "5.11", "status": "affected", "versionType": "semver"}, {"version": "5.12.14", "lessThan": "5.13", "status": "affected", "versionType": "semver"}]}, {"product": "Linux", "vendor": "Linux", "defaultStatus": "affected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["kernel/dma/swiotlb.c"], "versions": [{"version": "5.13", "status": "affected"}, {"version": "0", "lessThan": "5.13", "status": "unaffected", "versionType": "semver"}, {"version": "6.12.112", "lessThanOrEqual": "6.12.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.18.54", "lessThanOrEqual": "6.18.*", "status": "unaffected", "versionType": "semver"}, {"version": "7.2.8", "lessThanOrEqual": "7.2.*", "status": "unaffected", "versionType": "semver"}, {"version": "7.3-rc4", "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": "5.13", "versionEndExcluding": "6.12.112"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.13", "versionEndExcluding": "6.18.54"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.13", "versionEndExcluding": "7.2.8"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.13", "versionEndExcluding": "7.3-rc4"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.10.47"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.12.14"}]}]}], "references": [{"url": "https://git.kernel.org/stable/c/6e53b4d6afbde626255805d438cabb1cac482445"}, {"url": "https://git.kernel.org/stable/c/aa4709813b29db89f2307f968db5d24925dcdeb1"}, {"url": "https://git.kernel.org/stable/c/0219b72f5c209732b2f03a8cc0d7240b5e428a99"}, {"url": "https://git.kernel.org/stable/c/b7d7914a9ae3097e63d113007e4fb44d33d515b1"}], "title": "swiotlb: use the adjusted address for the highmem page lookup", "x_generator": {"engine": "bippy-1.2.0"}}}}

{}

{"affected": [{"affectedData": [{"defaultStatus": "unaffected", "product": "Linux", "programFiles": ["kernel/dma/swiotlb.c"], "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "versions": [{"lessThan": "6e53b4d6afbde626255805d438cabb1cac482445", "status": "affected", "version": "5f89468e2f060031cd89fd4287298e0eaf246bf6", "versionType": "git"}, {"lessThan": "aa4709813b29db89f2307f968db5d24925dcdeb1", "status": "affected", "version": "5f89468e2f060031cd89fd4287298e0eaf246bf6", "versionType": "git"}, {"lessThan": "0219b72f5c209732b2f03a8cc0d7240b5e428a99", "status": "affected", "version": "5f89468e2f060031cd89fd4287298e0eaf246bf6", "versionType": "git"}, {"lessThan": "b7d7914a9ae3097e63d113007e4fb44d33d515b1", "status": "affected", "version": "5f89468e2f060031cd89fd4287298e0eaf246bf6", "versionType": "git"}, {"status": "affected", "version": "e6108147dd91b94d1979b110f265710c254c99d5", "versionType": "git"}, {"status": "affected", "version": "e77b796eb9b7ca3c1c0d574d0c155f55b59ca8d5", "versionType": "git"}, {"lessThan": "5.11", "status": "affected", "version": "5.10.47", "versionType": "semver"}, {"lessThan": "5.13", "status": "affected", "version": "5.12.14", "versionType": "semver"}]}, {"defaultStatus": "affected", "product": "Linux", "programFiles": ["kernel/dma/swiotlb.c"], "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "versions": [{"status": "affected", "version": "5.13"}, {"lessThan": "5.13", "status": "unaffected", "version": "0", "versionType": "semver"}, {"lessThanOrEqual": "6.12.*", "status": "unaffected", "version": "6.12.112", "versionType": "semver"}, {"lessThanOrEqual": "6.18.*", "status": "unaffected", "version": "6.18.54", "versionType": "semver"}, {"lessThanOrEqual": "7.2.*", "status": "unaffected", "version": "7.2.8", "versionType": "semver"}, {"lessThanOrEqual": "*", "status": "unaffected", "version": "7.3-rc4", "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\nswiotlb: use the adjusted address for the highmem page lookup\n\nswiotlb_bounce() reads the page frame number from the slot's recorded\norig_addr, then advances orig_addr by tlb_offset to reach the address\nthe caller asked about. The highmem branch mixes the two: the offset\nwithin the page comes from the adjusted address, the page from the value\nbefore it.\n\nOnce the adjustment crosses a page boundary the pair no longer describes\none location, and the whole copy lands one page below the intended one\nfor a positive tlb_offset, one above for a negative one. DMA_FROM_DEVICE\nwrites the device data over the wrong page and leaves the intended one\nstale, DMA_TO_DEVICE feeds the device from a page the mapping may not\ncover. Partial syncs through dma_sync_single_range_for_*() are what make\ntlb_offset non-zero.\n\nThe branch test is picked the same way, so a slot recorded in lowmem can\nbe adjusted into highmem and the lowmem path then hands a highmem\naddress to phys_to_virt().\n\nTake both from orig_addr once it is final and keep pfn in the branch\nthat uses it. PhysHighMem() asks the question straight from the address,\nas dma-debug already does."}], "id": "CVE-2026-98254", "lastModified": "2026-10-06T09:18:14.057", "metrics": {}, "published": "2026-10-06T09:18:14.057", "references": [{"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/0219b72f5c209732b2f03a8cc0d7240b5e428a99"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/6e53b4d6afbde626255805d438cabb1cac482445"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/aa4709813b29db89f2307f968db5d24925dcdeb1"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/b7d7914a9ae3097e63d113007e4fb44d33d515b1"}], "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "vulnStatus": "Received"}

{}

{"affected": [{"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[5f89468e2f060031cd89fd4287298e0eaf246bf6,6e53b4d6afbde626255805d438cabb1cac482445)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[5f89468e2f060031cd89fd4287298e0eaf246bf6,aa4709813b29db89f2307f968db5d24925dcdeb1)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[5f89468e2f060031cd89fd4287298e0eaf246bf6,0219b72f5c209732b2f03a8cc0d7240b5e428a99)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[5f89468e2f060031cd89fd4287298e0eaf246bf6,b7d7914a9ae3097e63d113007e4fb44d33d515b1)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "e6108147dd91b94d1979b110f265710c254c99d5"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "e77b796eb9b7ca3c1c0d574d0c155f55b59ca8d5"}}, {"platform": null, "status": "affected", "versions": {"scheme": "semver", "value": "[5.10.47,5.11)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "semver", "value": "[5.12.14,5.13)"}}], "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": "semver", "value": "5.13"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[0,5.13)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[6.12.112,6.13.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[6.18.54,6.19.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[7.2.8,7.3.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "generic", "value": "[7.3-rc4,*]"}}], "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": "2026-10-06T14:30:07.739050+00:00", "updated": "2026-10-06T20:30:05.841870+00:00", "vendors": ["linux", "linux$PRODUCT$linux_kernel"], "weaknesses": ["CWE-119"]}