CVE-2026-90388

{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-90388", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2026-09-11T19:38:34.810Z", "datePublished": "2026-09-17T16:09:23.140Z", "dateUpdated": "2026-10-19T09:02:51.717Z"}, "containers": {"cna": {"providerMetadata": {"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-10-19T09:02:51.717Z"}, "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\niommu/dma: Check atomic pool allocation result directly\n\nThe non-blocking, non-coherent allocation path uses dma_alloc_from_pool(),\nwhich returns the allocated page and fills cpu_addr only on success.\n\nDo not rely on cpu_addr to detect allocation failure in this path. Check\nthe returned page directly before using it for the IOMMU mapping."}], "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 - iommu_dma_alloc() is reached from dma_alloc_attrs() on GFP_ATOMIC dma_alloc_coherent(); local entry points are VIDIOC_STREAMON scheduling mxc_jpeg_device_run()\u2192mxc_jpeg_alloc(), and USBDEVFS_SUBMITURB in proc_do_submiturb()\u2192usb_submit_urb(GFP_ATOMIC)\u2192dma_pool_alloc()\u2192pool_alloc_page(). No remote protocol message supplies the failed allocation.\nAC:L - The attacker drives dma_alloc_from_pool() failure by consuming the atomic gen_pool (repeated GFP_ATOMIC coherent allocs or a size larger than gen_pool_avail) then issues that ioctl; __dma_alloc_from_pool() does not store cpu_addr on failure, so a non-NULL leftover skips the old !cpu_addr check with no victim-side race.\nPR:L - mxc_jpeg_open() and proc_do_submiturb() have no capable() check; an unprivileged local user who can open the JPEG /dev/videoN or a usbfs device node reaches iommu_dma_alloc() without init-namespace root.\nUI:N - The attacker itself issues VIDIOC_QBUF/VIDIOC_STREAMON on its video fd or USBDEVFS_SUBMITURB on its usbfs fd; no separate user must mount, confirm, or plug a device.\nS:U - The leftover cpu_addr is used as a host kernel VA and page_to_phys(NULL) is mapped only in this device's iommu_dma domain via __iommu_dma_map(); that is in-kernel corruption, not a KVM/Xen escape or an extra translation into another VM's memory.\nC:H - iommu_dma_alloc() returns the uninitialized cpu_addr as the coherent buffer; later loads of that object (mxc_jpeg_config_dec_desc()/print_descriptor_info on slot_data.desc, or USB TD completion from a dma_pool block carved out of the wild page) disclose kernel memory through the leftover pointer.\nI:H - Callers store through that pointer: mxc_jpeg_config_dec_desc() writes desc->imgsize/stm_ctrl into jpeg->slot_data.desc, and pool_initialise_page() writes dma_block.next_block into page->vaddr from the failed dma_alloc_from_pool(), a kernel write primitive.\nA:H - page_to_phys(NULL) followed by iommu_map() in __iommu_dma_map(), or a store/load through an unmapped leftover cpu_addr in mxc_jpeg_config_dec_desc() or pool_initialise_page(), oopses or panics the kernel."}]}], "affected": [{"product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["drivers/iommu/dma-iommu.c"], "versions": [{"version": "9420139f516d7fbc248ce17f35275cb005ed98ea", "lessThan": "ac9cd0a669b8be5d178dbd471b0d68039dac58b5", "status": "affected", "versionType": "git"}, {"version": "9420139f516d7fbc248ce17f35275cb005ed98ea", "lessThan": "db46cb9da83a507d86d2bb080bdb09c865da3d0a", "status": "affected", "versionType": "git"}, {"version": "9420139f516d7fbc248ce17f35275cb005ed98ea", "lessThan": "d56c3f955b21e5764c1497e295a5b5d0b3a40470", "status": "affected", "versionType": "git"}, {"version": "9420139f516d7fbc248ce17f35275cb005ed98ea", "lessThan": "06dffc96693083dda3412311406e558cf27f1574", "status": "affected", "versionType": "git"}, {"version": "9420139f516d7fbc248ce17f35275cb005ed98ea", "lessThan": "a4ace31d732b657d774e31fb444c0c27d42c78e5", "status": "affected", "versionType": "git"}, {"version": "9420139f516d7fbc248ce17f35275cb005ed98ea", "lessThan": "fb0b39287ba894dbdfac2901c51788b63f5c2291", "status": "affected", "versionType": "git"}, {"version": "9420139f516d7fbc248ce17f35275cb005ed98ea", "lessThan": "8c486293ddd0af60991408149fc3e964ea888dc4", "status": "affected", "versionType": "git"}, {"version": "9420139f516d7fbc248ce17f35275cb005ed98ea", "lessThan": "af95a0ebc0a0db0762be75f51eadf770bad01aaa", "status": "affected", "versionType": "git"}, {"version": "47184b9ddf184cc9a77cf441943a0fe9b7afa575", "status": "affected", "versionType": "git"}, {"version": "5.8.6", "lessThan": "5.9", "status": "affected", "versionType": "semver"}]}, {"product": "Linux", "vendor": "Linux", "defaultStatus": "affected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["drivers/iommu/dma-iommu.c"], "versions": [{"version": "5.9", "status": "affected"}, {"version": "0", "lessThan": "5.9", "status": "unaffected", "versionType": "semver"}, {"version": "5.10.270", "lessThanOrEqual": "5.10.*", "status": "unaffected", "versionType": "semver"}, {"version": "5.15.221", "lessThanOrEqual": "5.15.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.1.188", "lessThanOrEqual": "6.1.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.6.157", "lessThanOrEqual": "6.6.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.12.110", "lessThanOrEqual": "6.12.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.18.52", "lessThanOrEqual": "6.18.*", "status": "unaffected", "versionType": "semver"}, {"version": "7.2.6", "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": "5.9", "versionEndExcluding": "5.10.270"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.9", "versionEndExcluding": "5.15.221"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.9", "versionEndExcluding": "6.1.188"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.9", "versionEndExcluding": "6.6.157"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.9", "versionEndExcluding": "6.12.110"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.9", "versionEndExcluding": "6.18.52"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.9", "versionEndExcluding": "7.2.6"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.9", "versionEndExcluding": "7.3"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.8.6"}]}]}], "references": [{"url": "https://git.kernel.org/stable/c/ac9cd0a669b8be5d178dbd471b0d68039dac58b5"}, {"url": "https://git.kernel.org/stable/c/db46cb9da83a507d86d2bb080bdb09c865da3d0a"}, {"url": "https://git.kernel.org/stable/c/d56c3f955b21e5764c1497e295a5b5d0b3a40470"}, {"url": "https://git.kernel.org/stable/c/06dffc96693083dda3412311406e558cf27f1574"}, {"url": "https://git.kernel.org/stable/c/a4ace31d732b657d774e31fb444c0c27d42c78e5"}, {"url": "https://git.kernel.org/stable/c/fb0b39287ba894dbdfac2901c51788b63f5c2291"}, {"url": "https://git.kernel.org/stable/c/8c486293ddd0af60991408149fc3e964ea888dc4"}, {"url": "https://git.kernel.org/stable/c/af95a0ebc0a0db0762be75f51eadf770bad01aaa"}], "title": "iommu/dma: Check atomic pool allocation result directly", "x_generator": {"engine": "bippy-1.2.0"}}}}

{}

{"affected": [{"affectedData": [{"defaultStatus": "unaffected", "product": "Linux", "programFiles": ["drivers/iommu/dma-iommu.c"], "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "versions": [{"lessThan": "ac9cd0a669b8be5d178dbd471b0d68039dac58b5", "status": "affected", "version": "9420139f516d7fbc248ce17f35275cb005ed98ea", "versionType": "git"}, {"lessThan": "db46cb9da83a507d86d2bb080bdb09c865da3d0a", "status": "affected", "version": "9420139f516d7fbc248ce17f35275cb005ed98ea", "versionType": "git"}, {"lessThan": "d56c3f955b21e5764c1497e295a5b5d0b3a40470", "status": "affected", "version": "9420139f516d7fbc248ce17f35275cb005ed98ea", "versionType": "git"}, {"lessThan": "06dffc96693083dda3412311406e558cf27f1574", "status": "affected", "version": "9420139f516d7fbc248ce17f35275cb005ed98ea", "versionType": "git"}, {"lessThan": "a4ace31d732b657d774e31fb444c0c27d42c78e5", "status": "affected", "version": "9420139f516d7fbc248ce17f35275cb005ed98ea", "versionType": "git"}, {"lessThan": "fb0b39287ba894dbdfac2901c51788b63f5c2291", "status": "affected", "version": "9420139f516d7fbc248ce17f35275cb005ed98ea", "versionType": "git"}, {"lessThan": "8c486293ddd0af60991408149fc3e964ea888dc4", "status": "affected", "version": "9420139f516d7fbc248ce17f35275cb005ed98ea", "versionType": "git"}, {"lessThan": "af95a0ebc0a0db0762be75f51eadf770bad01aaa", "status": "affected", "version": "9420139f516d7fbc248ce17f35275cb005ed98ea", "versionType": "git"}, {"status": "affected", "version": "47184b9ddf184cc9a77cf441943a0fe9b7afa575", "versionType": "git"}, {"lessThan": "5.9", "status": "affected", "version": "5.8.6", "versionType": "semver"}]}, {"defaultStatus": "affected", "product": "Linux", "programFiles": ["drivers/iommu/dma-iommu.c"], "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "versions": [{"status": "affected", "version": "5.9"}, {"lessThan": "5.9", "status": "unaffected", "version": "0", "versionType": "semver"}, {"lessThanOrEqual": "5.10.*", "status": "unaffected", "version": "5.10.270", "versionType": "semver"}, {"lessThanOrEqual": "5.15.*", "status": "unaffected", "version": "5.15.221", "versionType": "semver"}, {"lessThanOrEqual": "6.1.*", "status": "unaffected", "version": "6.1.188", "versionType": "semver"}, {"lessThanOrEqual": "6.6.*", "status": "unaffected", "version": "6.6.157", "versionType": "semver"}, {"lessThanOrEqual": "6.12.*", "status": "unaffected", "version": "6.12.110", "versionType": "semver"}, {"lessThanOrEqual": "6.18.*", "status": "unaffected", "version": "6.18.52", "versionType": "semver"}, {"lessThanOrEqual": "7.2.*", "status": "unaffected", "version": "7.2.6", "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\niommu/dma: Check atomic pool allocation result directly\n\nThe non-blocking, non-coherent allocation path uses dma_alloc_from_pool(),\nwhich returns the allocated page and fills cpu_addr only on success.\n\nDo not rely on cpu_addr to detect allocation failure in this path. Check\nthe returned page directly before using it for the IOMMU mapping."}], "id": "CVE-2026-90388", "lastModified": "2026-10-19T09:19:32.843", "metrics": {"cvssMetricV31": [{"cvssData": {"attackComplexity": "LOW", "attackVector": "LOCAL", "availabilityImpact": "HIGH", "baseScore": 7.8, "baseSeverity": "HIGH", "confidentialityImpact": "HIGH", "integrityImpact": "HIGH", "privilegesRequired": "LOW", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H", "version": "3.1"}, "exploitabilityScore": 1.8, "impactScore": 5.9, "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "type": "Secondary"}]}, "published": "2026-09-17T17:17:38.287", "references": [{"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/06dffc96693083dda3412311406e558cf27f1574"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/8c486293ddd0af60991408149fc3e964ea888dc4"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/a4ace31d732b657d774e31fb444c0c27d42c78e5"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/ac9cd0a669b8be5d178dbd471b0d68039dac58b5"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/af95a0ebc0a0db0762be75f51eadf770bad01aaa"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/d56c3f955b21e5764c1497e295a5b5d0b3a40470"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/db46cb9da83a507d86d2bb080bdb09c865da3d0a"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/fb0b39287ba894dbdfac2901c51788b63f5c2291"}], "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "vulnStatus": "Received"}

{}

{"affected": [{"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[9420139f516d7fbc248ce17f35275cb005ed98ea,ac9cd0a669b8be5d178dbd471b0d68039dac58b5)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[9420139f516d7fbc248ce17f35275cb005ed98ea,db46cb9da83a507d86d2bb080bdb09c865da3d0a)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[9420139f516d7fbc248ce17f35275cb005ed98ea,d56c3f955b21e5764c1497e295a5b5d0b3a40470)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[9420139f516d7fbc248ce17f35275cb005ed98ea,06dffc96693083dda3412311406e558cf27f1574)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[9420139f516d7fbc248ce17f35275cb005ed98ea,a4ace31d732b657d774e31fb444c0c27d42c78e5)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[9420139f516d7fbc248ce17f35275cb005ed98ea,fb0b39287ba894dbdfac2901c51788b63f5c2291)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[9420139f516d7fbc248ce17f35275cb005ed98ea,8c486293ddd0af60991408149fc3e964ea888dc4)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[9420139f516d7fbc248ce17f35275cb005ed98ea,af95a0ebc0a0db0762be75f51eadf770bad01aaa)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "47184b9ddf184cc9a77cf441943a0fe9b7afa575"}}, {"platform": null, "status": "affected", "versions": {"scheme": "semver", "value": "[5.8.6,5.9)"}}], "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": "5.9"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[0,5.9)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "generic", "value": "[5.10.270,5.10.*]"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "generic", "value": "[5.15.221,5.15.*]"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "generic", "value": "[6.1.188,6.1.*]"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "generic", "value": "[6.6.157,6.6.*]"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "generic", "value": "[6.12.110,6.12.*]"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "generic", "value": "[6.18.52,6.18.*]"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "generic", "value": "[7.2.6,7.2.*]"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "generic", "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": "2026-09-19T05:15:10.871226+00:00", "updated": "2026-09-20T02:00:13.568464+00:00", "vendors": ["linux", "linux$PRODUCT$linux_kernel"], "weaknesses": ["CWE-476", "CWE-346"]}