Vulnerability-Lookup

FKIE_CVE-2026-98180

Vulnerability from fkie_nvd - Published: 2026-10-06 09:18 - Updated: 2026-10-07 07:17

Severity

7.1 (High) - CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:H

Summary

In the Linux kernel, the following vulnerability has been resolved: drm/msm: RCU-free the scheduler-containing ring and VM objects Both struct msm_ringbuffer and struct msm_gem_vm embed a struct drm_gpu_scheduler. msm_ringbuffer_destroy() and the VM free callback msm_gem_vm_free() call drm_sched_fini() on the embedded scheduler and then free the containing object with plain kfree(). drm_sched_fence_get_timeline_name() returns fence->sched->name, and the scheduler fence keeps a .release callback so it is not ops-detached on signalling. A finished fence exported to userspace (the submit out-fence, or a VM_BIND fence, via sync_file / drm_syncobj) keeps pointing at the embedded scheduler after the ring/VM is freed, so a later get_timeline_name() -- reachable unprivileged through SYNC_IOC_FILE_INFO -- dereferences freed slab memory (KASAN slab-use-after-free read). Per the dma-fence lifetime contract the exporter must keep the data backing a signalled fence alive for an RCU grace period. Free the scheduler-containing objects with kfree_rcu() instead of kfree(). Patchwork: https://patchwork.freedesktop.org/patch/750234/

References

	URL	Tags
	416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/01c8d1f385f788f1bbbbb7687c4386d614281218
	416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/713abac5c04ccbae67f9ac68c3921845535388e7
	416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/d81bf4581903b0cba0698cd4d1c07fc6be21754a

Impacted products

	Vendor	Product	Version

JSON

To clipboard

{
  "affected": [
    {
      "affectedData": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "drivers/gpu/drm/msm/msm_gem.h",
            "drivers/gpu/drm/msm/msm_gem_vma.c",
            "drivers/gpu/drm/msm/msm_ringbuffer.c",
            "drivers/gpu/drm/msm/msm_ringbuffer.h"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "lessThan": "d81bf4581903b0cba0698cd4d1c07fc6be21754a",
              "status": "affected",
              "version": "1d8a5ca436ee4a28eec14cb813f790f7cdeeee19",
              "versionType": "git"
            },
            {
              "lessThan": "713abac5c04ccbae67f9ac68c3921845535388e7",
              "status": "affected",
              "version": "1d8a5ca436ee4a28eec14cb813f790f7cdeeee19",
              "versionType": "git"
            },
            {
              "lessThan": "01c8d1f385f788f1bbbbb7687c4386d614281218",
              "status": "affected",
              "version": "1d8a5ca436ee4a28eec14cb813f790f7cdeeee19",
              "versionType": "git"
            }
          ]
        },
        {
          "defaultStatus": "affected",
          "product": "Linux",
          "programFiles": [
            "drivers/gpu/drm/msm/msm_gem.h",
            "drivers/gpu/drm/msm/msm_gem_vma.c",
            "drivers/gpu/drm/msm/msm_ringbuffer.c",
            "drivers/gpu/drm/msm/msm_ringbuffer.h"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "5.15"
            },
            {
              "lessThan": "5.15",
              "status": "unaffected",
              "version": "0",
              "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\ndrm/msm: RCU-free the scheduler-containing ring and VM objects\n\nBoth struct msm_ringbuffer and struct msm_gem_vm embed a struct\ndrm_gpu_scheduler.  msm_ringbuffer_destroy() and the VM free callback\nmsm_gem_vm_free() call drm_sched_fini() on the embedded scheduler and then\nfree the containing object with plain kfree().\n\ndrm_sched_fence_get_timeline_name() returns fence-\u003esched-\u003ename, and the\nscheduler fence keeps a .release callback so it is not ops-detached on\nsignalling.  A finished fence exported to userspace (the submit out-fence, or\na VM_BIND fence, via sync_file / drm_syncobj) keeps pointing at the embedded\nscheduler after the ring/VM is freed, so a later get_timeline_name() --\nreachable unprivileged through SYNC_IOC_FILE_INFO -- dereferences freed slab\nmemory (KASAN slab-use-after-free read).\n\nPer the dma-fence lifetime contract the exporter must keep the data backing a\nsignalled fence alive for an RCU grace period.  Free the scheduler-containing\nobjects with kfree_rcu() instead of kfree().\n\nPatchwork: https://patchwork.freedesktop.org/patch/750234/"
    }
  ],
  "id": "CVE-2026-98180",
  "lastModified": "2026-10-07T07:17:04.363",
  "metrics": {
    "cvssMetricV31": [
      {
        "cvssData": {
          "attackComplexity": "LOW",
          "attackVector": "LOCAL",
          "availabilityImpact": "HIGH",
          "baseScore": 7.1,
          "baseSeverity": "HIGH",
          "confidentialityImpact": "HIGH",
          "integrityImpact": "NONE",
          "privilegesRequired": "LOW",
          "scope": "UNCHANGED",
          "userInteraction": "NONE",
          "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:H",
          "version": "3.1"
        },
        "exploitabilityScore": 1.8,
        "impactScore": 5.2,
        "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "type": "Secondary"
      }
    ]
  },
  "published": "2026-10-06T09:18:01.617",
  "references": [
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/01c8d1f385f788f1bbbbb7687c4386d614281218"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/713abac5c04ccbae67f9ac68c3921845535388e7"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/d81bf4581903b0cba0698cd4d1c07fc6be21754a"
    }
  ],
  "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
  "vulnStatus": "Received"
}

CVE-2026-98180 (GCVE-0-2026-98180)

Vulnerability from cvelistv5 – Published: 2026-10-06 08:44 – Updated: 2026-10-07 06:49

Title

drm/msm: RCU-free the scheduler-containing ring and VM objects

Summary

Severity

7.1 (High)


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

Assigner

Linux CNA under the mitre root

CNA scorecard D 53/100 over 6664 records in the last 180 days details

References

3 references

URL	Tags
https://git.kernel.org/stable/c/d81bf4581903b0cba…
https://git.kernel.org/stable/c/713abac5c04ccbae6…
https://git.kernel.org/stable/c/01c8d1f385f788f1b…

Impacted products

2 products

Vendor	Product	Version
Linux	Linux	Affected: 1d8a5ca436ee4a28eec14cb813f790f7cdeeee19 , < d81bf4581903b0cba0698cd4d1c07fc6be21754a (git) Affected: 1d8a5ca436ee4a28eec14cb813f790f7cdeeee19 , < 713abac5c04ccbae67f9ac68c3921845535388e7 (git) Affected: 1d8a5ca436ee4a28eec14cb813f790f7cdeeee19 , < 01c8d1f385f788f1bbbbb7687c4386d614281218 (git)
Linux	Linux	Affected: 5.15 Unaffected: 0 , < 5.15 (semver) Unaffected: 6.18.54 , ≤ 6.18.* (semver) Unaffected: 7.2.8 , ≤ 7.2.* (semver) Unaffected: 7.3-rc4 , ≤ * (original_commit_for_fix)

Show details on NVD website

JSON

To clipboard

{
  "containers": {
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "drivers/gpu/drm/msm/msm_gem.h",
            "drivers/gpu/drm/msm/msm_gem_vma.c",
            "drivers/gpu/drm/msm/msm_ringbuffer.c",
            "drivers/gpu/drm/msm/msm_ringbuffer.h"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "lessThan": "d81bf4581903b0cba0698cd4d1c07fc6be21754a",
              "status": "affected",
              "version": "1d8a5ca436ee4a28eec14cb813f790f7cdeeee19",
              "versionType": "git"
            },
            {
              "lessThan": "713abac5c04ccbae67f9ac68c3921845535388e7",
              "status": "affected",
              "version": "1d8a5ca436ee4a28eec14cb813f790f7cdeeee19",
              "versionType": "git"
            },
            {
              "lessThan": "01c8d1f385f788f1bbbbb7687c4386d614281218",
              "status": "affected",
              "version": "1d8a5ca436ee4a28eec14cb813f790f7cdeeee19",
              "versionType": "git"
            }
          ]
        },
        {
          "defaultStatus": "affected",
          "product": "Linux",
          "programFiles": [
            "drivers/gpu/drm/msm/msm_gem.h",
            "drivers/gpu/drm/msm/msm_gem_vma.c",
            "drivers/gpu/drm/msm/msm_ringbuffer.c",
            "drivers/gpu/drm/msm/msm_ringbuffer.h"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "5.15"
            },
            {
              "lessThan": "5.15",
              "status": "unaffected",
              "version": "0",
              "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"
            }
          ]
        }
      ],
      "cpeApplicability": [
        {
          "nodes": [
            {
              "cpeMatch": [
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.18.54",
                  "versionStartIncluding": "5.15",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "7.2.8",
                  "versionStartIncluding": "5.15",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "7.3-rc4",
                  "versionStartIncluding": "5.15",
                  "vulnerable": true
                }
              ],
              "negate": false,
              "operator": "OR"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\ndrm/msm: RCU-free the scheduler-containing ring and VM objects\n\nBoth struct msm_ringbuffer and struct msm_gem_vm embed a struct\ndrm_gpu_scheduler.  msm_ringbuffer_destroy() and the VM free callback\nmsm_gem_vm_free() call drm_sched_fini() on the embedded scheduler and then\nfree the containing object with plain kfree().\n\ndrm_sched_fence_get_timeline_name() returns fence-\u003esched-\u003ename, and the\nscheduler fence keeps a .release callback so it is not ops-detached on\nsignalling.  A finished fence exported to userspace (the submit out-fence, or\na VM_BIND fence, via sync_file / drm_syncobj) keeps pointing at the embedded\nscheduler after the ring/VM is freed, so a later get_timeline_name() --\nreachable unprivileged through SYNC_IOC_FILE_INFO -- dereferences freed slab\nmemory (KASAN slab-use-after-free read).\n\nPer the dma-fence lifetime contract the exporter must keep the data backing a\nsignalled fence alive for an RCU grace period.  Free the scheduler-containing\nobjects with kfree_rcu() instead of kfree().\n\nPatchwork: https://patchwork.freedesktop.org/patch/750234/"
        }
      ],
      "metrics": [
        {
          "cvssV3_1": {
            "baseScore": 7.1,
            "baseSeverity": "HIGH",
            "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:H",
            "version": "3.1"
          },
          "scenarios": [
            {
              "lang": "en",
              "value": "AV:L - The freed memory is reached by a local process through render-node ioctls (MSM_SET_PARAM to enable VM_BIND, MSM_VM_BIND/MSM_GEM_SUBMIT with an out-fence) followed by SYNC_IOC_FILE_INFO on the exported sync_file. No remote data is involved.\nAC:L - The attacker runs every step: create a user-managed VM, submit a VM_BIND job with an out-fence fd, close the DRM fd so msm_gem_vm_close()/msm_gem_vm_free() kfree the VM, then query the sync_file. They choose when the free happens, so there is no race they can\u0027t control.\nPR:L - All msm ioctls used are DRM_RENDER_ALLOW and the sync_file ioctl needs only the fd. An unprivileged user with render-node access (render group, or any Android app with GPU access) can do this without capabilities.\nUI:N - No victim action is needed. The attacker creates and frees the VM and queries the fence entirely through their own file descriptors.\nS:U - This is a use-after-free in the kernel\u0027s own memory with impact inside the same kernel authority. No VM, IOMMU or sandbox boundary is crossed.\nC:H - drm_sched_fence_get_timeline_name() returns fence-\u003esched-\u003ename from the freed msm_gem_vm. If the slab is refilled with attacker data, that name pointer is attacker-controlled, and sync_fill_fence_info() strscpy()s up to 32 bytes from that address into obj_name returned to userspace. That is a repeatable arbitrary kernel read.\nI:N - Nothing writes through the stale fence-\u003esched: get_timeline_name only reads it and sched_entity.c only compares the pointer. The freed scheduler gives a read primitive, not a write or control-flow primitive.\nA:H - Dereferencing freed or reclaimed memory and strscpy() from a bad name pointer causes a kernel oops/panic (KASAN slab-use-after-free read), which the attacker can trigger repeatedly."
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-10-07T06:49:28.231Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
      "references": [
        {
          "url": "https://git.kernel.org/stable/c/d81bf4581903b0cba0698cd4d1c07fc6be21754a"
        },
        {
          "url": "https://git.kernel.org/stable/c/713abac5c04ccbae67f9ac68c3921845535388e7"
        },
        {
          "url": "https://git.kernel.org/stable/c/01c8d1f385f788f1bbbbb7687c4386d614281218"
        }
      ],
      "title": "drm/msm: RCU-free the scheduler-containing ring and VM objects",
      "x_generator": {
        "engine": "bippy-1.2.0"
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "cveId": "CVE-2026-98180",
    "datePublished": "2026-10-06T08:44:23.327Z",
    "dateReserved": "2026-09-25T10:25:14.322Z",
    "dateUpdated": "2026-10-07T06:49:28.231Z",
    "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.

Vulnerability timeline

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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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