{"api_version":"1","generated_at":"2026-10-26T06:56:55+00:00","cve":"CVE-2026-90388","urls":{"html":"https://cve.report/CVE-2026-90388","api":"https://cve.report/api/cve/CVE-2026-90388.json","docs":"https://cve.report/api","cve_org":"https://www.cve.org/CVERecord?id=CVE-2026-90388","nvd":"https://nvd.nist.gov/vuln/detail/CVE-2026-90388"},"summary":{"title":"iommu/dma: Check atomic pool allocation result directly","description":"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.","state":"PUBLISHED","assigner":"Linux","published_at":"2026-09-17 17:17:38","updated_at":"2026-10-19 09:19:32"},"problem_types":[],"metrics":[{"version":"3.1","source":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","type":"Secondary","score":"7.8","severity":"HIGH","vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","data":{"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","attackVector":"LOCAL","attackComplexity":"LOW","privilegesRequired":"LOW","userInteraction":"NONE","scope":"UNCHANGED","confidentialityImpact":"HIGH","integrityImpact":"HIGH","availabilityImpact":"HIGH"}},{"version":"3.1","source":"CNA","type":"DECLARED","score":"7.8","severity":"HIGH","vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","data":{"baseScore":7.8,"baseSeverity":"HIGH","vectorString":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","version":"3.1"}}],"references":[{"url":"https://git.kernel.org/stable/c/af95a0ebc0a0db0762be75f51eadf770bad01aaa","name":"https://git.kernel.org/stable/c/af95a0ebc0a0db0762be75f51eadf770bad01aaa","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/fb0b39287ba894dbdfac2901c51788b63f5c2291","name":"https://git.kernel.org/stable/c/fb0b39287ba894dbdfac2901c51788b63f5c2291","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/ac9cd0a669b8be5d178dbd471b0d68039dac58b5","name":"https://git.kernel.org/stable/c/ac9cd0a669b8be5d178dbd471b0d68039dac58b5","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/06dffc96693083dda3412311406e558cf27f1574","name":"https://git.kernel.org/stable/c/06dffc96693083dda3412311406e558cf27f1574","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/d56c3f955b21e5764c1497e295a5b5d0b3a40470","name":"https://git.kernel.org/stable/c/d56c3f955b21e5764c1497e295a5b5d0b3a40470","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/a4ace31d732b657d774e31fb444c0c27d42c78e5","name":"https://git.kernel.org/stable/c/a4ace31d732b657d774e31fb444c0c27d42c78e5","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/db46cb9da83a507d86d2bb080bdb09c865da3d0a","name":"https://git.kernel.org/stable/c/db46cb9da83a507d86d2bb080bdb09c865da3d0a","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/8c486293ddd0af60991408149fc3e964ea888dc4","name":"https://git.kernel.org/stable/c/8c486293ddd0af60991408149fc3e964ea888dc4","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://www.cve.org/CVERecord?id=CVE-2026-90388","name":"CVE Program record","refsource":"CVE.ORG","tags":["canonical"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-90388","name":"NVD vulnerability detail","refsource":"NVD","tags":["canonical","analysis"]}],"affected":[{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 9420139f516d7fbc248ce17f35275cb005ed98ea ac9cd0a669b8be5d178dbd471b0d68039dac58b5 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 9420139f516d7fbc248ce17f35275cb005ed98ea db46cb9da83a507d86d2bb080bdb09c865da3d0a git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 9420139f516d7fbc248ce17f35275cb005ed98ea d56c3f955b21e5764c1497e295a5b5d0b3a40470 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 9420139f516d7fbc248ce17f35275cb005ed98ea 06dffc96693083dda3412311406e558cf27f1574 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 9420139f516d7fbc248ce17f35275cb005ed98ea a4ace31d732b657d774e31fb444c0c27d42c78e5 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 9420139f516d7fbc248ce17f35275cb005ed98ea fb0b39287ba894dbdfac2901c51788b63f5c2291 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 9420139f516d7fbc248ce17f35275cb005ed98ea 8c486293ddd0af60991408149fc3e964ea888dc4 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 9420139f516d7fbc248ce17f35275cb005ed98ea af95a0ebc0a0db0762be75f51eadf770bad01aaa git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 47184b9ddf184cc9a77cf441943a0fe9b7afa575 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 5.8.6 5.9 semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 5.9","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 5.9 semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 5.10.270 5.10.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 5.15.221 5.15.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 6.1.188 6.1.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 6.6.157 6.6.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 6.12.110 6.12.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 6.18.52 6.18.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 7.2.6 7.2.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 7.3 * original_commit_for_fix","platforms":[]}],"timeline":[],"solutions":[],"workarounds":[],"exploits":[],"credits":[],"nvd_cpes":[],"vendor_comments":[],"enrichments":{"kev":null,"epss":{"cve_year":"2026","cve_id":"90388","cve":"CVE-2026-90388","epss":"0.001640000","percentile":"0.060210000","score_date":"2026-09-21","updated_at":"2026-09-22 00:03:19"},"legacy_qids":[]},"source_records":{"cve_program":{"containers":{"cna":{"affected":[{"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"}]}],"cpeApplicability":[{"nodes":[{"cpeMatch":[{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"5.10.270","versionStartIncluding":"5.9","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"5.15.221","versionStartIncluding":"5.9","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"6.1.188","versionStartIncluding":"5.9","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"6.6.157","versionStartIncluding":"5.9","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"6.12.110","versionStartIncluding":"5.9","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"6.18.52","versionStartIncluding":"5.9","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"7.2.6","versionStartIncluding":"5.9","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"7.3","versionStartIncluding":"5.9","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.8.6","vulnerable":true}],"negate":false,"operator":"OR"}]}],"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":{"baseScore":7.8,"baseSeverity":"HIGH","vectorString":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","version":"3.1"},"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()→mxc_jpeg_alloc(), and USBDEVFS_SUBMITURB in proc_do_submiturb()→usb_submit_urb(GFP_ATOMIC)→dma_pool_alloc()→pool_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."}]}],"providerMetadata":{"dateUpdated":"2026-10-19T09:02:51.717Z","orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","shortName":"Linux"},"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"}}},"cveMetadata":{"assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","assignerShortName":"Linux","cveId":"CVE-2026-90388","datePublished":"2026-09-17T16:09:23.140Z","dateReserved":"2026-09-11T19:38:34.810Z","dateUpdated":"2026-10-19T09:02:51.717Z","state":"PUBLISHED"},"dataType":"CVE_RECORD","dataVersion":"5.2"},"nvd":{"publishedDate":"2026-09-17 17:17:38","lastModifiedDate":"2026-10-19 09:19:32","problem_types":[],"metrics":{"cvssMetricV31":[{"source":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","type":"Secondary","cvssData":{"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","attackVector":"LOCAL","attackComplexity":"LOW","privilegesRequired":"LOW","userInteraction":"NONE","scope":"UNCHANGED","confidentialityImpact":"HIGH","integrityImpact":"HIGH","availabilityImpact":"HIGH"},"exploitabilityScore":1.8,"impactScore":5.9}]},"configurations":[]},"legacy_mitre":{"record":{"CveYear":"2026","CveId":"90388","Ordinal":"1","Title":"iommu/dma: Check atomic pool allocation result directly","CVE":"CVE-2026-90388","Year":"2026"},"notes":[{"CveYear":"2026","CveId":"90388","Ordinal":"1","NoteData":"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.","Type":"Description","Title":"iommu/dma: Check atomic pool allocation result directly"}]}}}