Vulnerability-Lookup

GHSA-F6R8-238V-4FM2

Vulnerability from github – Published: 2026-09-17 18:32 – Updated: 2026-09-18 18:31

Details

In the Linux kernel, the following vulnerability has been resolved:

iommu/dma: Check atomic pool allocation result directly

The non-blocking, non-coherent allocation path uses dma_alloc_from_pool(), which returns the allocated page and fills cpu_addr only on success.

Do not rely on cpu_addr to detect allocation failure in this path. Check the returned page directly before using it for the IOMMU mapping.

Severity

7.8 (High)


                  
                    CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

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{
  "affected": [],
  "aliases": [
    "CVE-2026-90388"
  ],
  "database_specific": {
    "cwe_ids": [],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2026-09-17T17:17:38Z",
    "severity": "HIGH"
  },
  "details": "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": "GHSA-f6r8-238v-4fm2",
  "modified": "2026-09-18T18:31:31Z",
  "published": "2026-09-17T18:32:03Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-90388"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/06dffc96693083dda3412311406e558cf27f1574"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/8c486293ddd0af60991408149fc3e964ea888dc4"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/a4ace31d732b657d774e31fb444c0c27d42c78e5"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/ac9cd0a669b8be5d178dbd471b0d68039dac58b5"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/af95a0ebc0a0db0762be75f51eadf770bad01aaa"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/d56c3f955b21e5764c1497e295a5b5d0b3a40470"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/db46cb9da83a507d86d2bb080bdb09c865da3d0a"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/fb0b39287ba894dbdfac2901c51788b63f5c2291"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
      "type": "CVSS_V3"
    }
  ]
}

CVE-2026-90388 (GCVE-0-2026-90388)

Vulnerability from cvelistv5 – Published: 2026-09-17 16:09 – Updated: 2026-09-18 17:55

Title

iommu/dma: Check atomic pool allocation result directly

Summary

In the Linux kernel, the following vulnerability has been resolved: iommu/dma: Check atomic pool allocation result directly The non-blocking, non-coherent allocation path uses dma_alloc_from_pool(), which returns the allocated page and fills cpu_addr only on success. Do not rely on cpu_addr to detect allocation failure in this path. Check the returned page directly before using it for the IOMMU mapping.

Severity

7.8 (High)


                        
                          CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Assigner

Linux mitre root Scorecard

References

8 references

URL	Tags
https://git.kernel.org/stable/c/ac9cd0a669b8be5d1…
https://git.kernel.org/stable/c/db46cb9da83a507d8…
https://git.kernel.org/stable/c/d56c3f955b21e5764…
https://git.kernel.org/stable/c/06dffc96693083dda…
https://git.kernel.org/stable/c/a4ace31d732b657d7…
https://git.kernel.org/stable/c/fb0b39287ba894dbd…
https://git.kernel.org/stable/c/8c486293ddd0af609…
https://git.kernel.org/stable/c/af95a0ebc0a0db076…

Impacted products

2 products

Vendor	Product	Version
Linux	Linux	Affected: 9420139f516d7fbc248ce17f35275cb005ed98ea , < ac9cd0a669b8be5d178dbd471b0d68039dac58b5 (git) Affected: 9420139f516d7fbc248ce17f35275cb005ed98ea , < db46cb9da83a507d86d2bb080bdb09c865da3d0a (git) Affected: 9420139f516d7fbc248ce17f35275cb005ed98ea , < d56c3f955b21e5764c1497e295a5b5d0b3a40470 (git) Affected: 9420139f516d7fbc248ce17f35275cb005ed98ea , < 06dffc96693083dda3412311406e558cf27f1574 (git) Affected: 9420139f516d7fbc248ce17f35275cb005ed98ea , < a4ace31d732b657d774e31fb444c0c27d42c78e5 (git) Affected: 9420139f516d7fbc248ce17f35275cb005ed98ea , < fb0b39287ba894dbdfac2901c51788b63f5c2291 (git) Affected: 9420139f516d7fbc248ce17f35275cb005ed98ea , < 8c486293ddd0af60991408149fc3e964ea888dc4 (git) Affected: 9420139f516d7fbc248ce17f35275cb005ed98ea , < af95a0ebc0a0db0762be75f51eadf770bad01aaa (git) Affected: 47184b9ddf184cc9a77cf441943a0fe9b7afa575 (git) Affected: 5.8.6 , < 5.9 (semver)
Linux	Linux	Affected: 5.9 Unaffected: 0 , < 5.9 (semver) Unaffected: 5.10.270 , ≤ 5.10.* (semver) Unaffected: 5.15.221 , ≤ 5.15.* (semver) Unaffected: 6.1.188 , ≤ 6.1.* (semver) Unaffected: 6.6.157 , ≤ 6.6.* (semver) Unaffected: 6.12.110 , ≤ 6.12.* (semver) Unaffected: 6.18.52 , ≤ 6.18.* (semver) Unaffected: 7.2.6 , ≤ 7.2.* (semver) Unaffected: 7.3-rc1 , ≤ * (original_commit_for_fix)

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{
  "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"
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              "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",
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              "versionType": "git"
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            {
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          "vendor": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "5.9"
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            {
              "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-rc1",
              "versionType": "original_commit_for_fix"
            }
          ]
        }
      ],
      "cpeApplicability": [
        {
          "nodes": [
            {
              "cpeMatch": [
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                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
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                  "versionStartIncluding": "5.9",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "5.15.221",
                  "versionStartIncluding": "5.9",
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                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
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                  "versionStartIncluding": "5.9",
                  "vulnerable": true
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                {
                  "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-rc1",
                  "versionStartIncluding": "5.9",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionStartIncluding": "5.8.6",
                  "vulnerable": true
                }
              ],
              "negate": false,
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          "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()\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\u0027s iommu_dma domain via __iommu_dma_map(); that is in-kernel corruption, not a KVM/Xen escape or an extra translation into another VM\u0027s 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-\u003eimgsize/stm_ctrl into jpeg-\u003eslot_data.desc, and pool_initialise_page() writes dma_block.next_block into page-\u003evaddr 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": "2026-09-18T17:55:02.646Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
      "references": [
        {
          "url": "https://git.kernel.org/stable/c/ac9cd0a669b8be5d178dbd471b0d68039dac58b5"
        },
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          "url": "https://git.kernel.org/stable/c/db46cb9da83a507d86d2bb080bdb09c865da3d0a"
        },
        {
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        },
        {
          "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": "2026-09-18T17:55:02.646Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}

Sightings

Author	Source	Type	Date	Other

Nomenclature

Seen: The vulnerability was mentioned, discussed, or observed by the user.
Confirmed: The vulnerability has been validated from an analyst's perspective.
Published Proof of Concept: A public proof of concept is available for this vulnerability.
Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
Not confirmed: The user expressed doubt about the validity of the vulnerability.
Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.

The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base model, served locally by ML-Gateway. They have not been verified by an analyst and are provided for guidance only.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
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GHSA-F6R8-238V-4FM2

CVE-2026-90388 (GCVE-0-2026-90388)

Tags

Sightings

Nomenclature

Related by attack behaviour