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CVE-2026-72449 (GCVE-0-2026-72449)

Vulnerability from cvelistv5 – Published: 2026-08-15 05:56 – Updated: 2026-08-17 05:44
VLAI
Title
drm/amdkfd: fix list_del corruption in kfd_criu_resume_svm
Summary
In the Linux kernel, the following vulnerability has been resolved: drm/amdkfd: fix list_del corruption in kfd_criu_resume_svm The cleanup tail of kfd_criu_resume_svm() walks svms->criu_svm_metadata_list and kfree()s each struct criu_svm_metadata without removing it from the list. The list head is left pointing at freed kmalloc-96 objects. A second AMDKFD_IOC_CRIU_OP from the same process re-enters: list_empty() reads the dangling ->next (use-after-free), the loop walks freed entries, and each is kfree()'d again (double-free). This is reachable by an unprivileged render-group user via /dev/kfd with no capabilities required. Add list_del() before the kfree() so the list is properly emptied. The list_for_each_entry_safe() iterator already caches the next pointer, so unlinking during the walk is safe. (cherry picked from commit 6322d278a298e2c1430b9d2697743d3a04b788b1)
Severity
7.8 (High)
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Assigner
References
Impacted products
Vendor Product Version CPE status
Linux Linux Affected: 2a909ae718715b3bac75d945e38dc0a5e4a0f1ba , < c8a8d350a273c005a48c64c4519d21b2a51c5ceb (git)
Affected: 2a909ae718715b3bac75d945e38dc0a5e4a0f1ba , < 506e635aed05dbdeef11e3c59f6e42980cda5b6d (git)
Affected: 2a909ae718715b3bac75d945e38dc0a5e4a0f1ba , < 838b57b3e7ce8cce0fda56d0861add3d464dd6c8 (git)
Affected: 2a909ae718715b3bac75d945e38dc0a5e4a0f1ba , < 96ac562a9ea3020981f536384711190841c81aa8 (git)
Affected: 2a909ae718715b3bac75d945e38dc0a5e4a0f1ba , < e33a3bd5cb8d0cf1557dee014115f812c9686130 (git)
Affected: 2a909ae718715b3bac75d945e38dc0a5e4a0f1ba , < 8fa5655da368d0306c03e9dc9cda8ae2a7840926 (git)
guessed Create a notification for this product.
Linux Linux Affected: 5.18
Unaffected: 0 , < 5.18 (semver)
Unaffected: 6.1.178 , ≤ 6.1.* (semver)
Unaffected: 6.6.145 , ≤ 6.6.* (semver)
Unaffected: 6.12.97 , ≤ 6.12.* (semver)
Unaffected: 6.18.40 , ≤ 6.18.* (semver)
Unaffected: 7.1.5 , ≤ 7.1.* (semver)
Unaffected: 7.2 , ≤ * (original_commit_for_fix)
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{
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          "product": "Linux",
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          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\ndrm/amdkfd: fix list_del corruption in kfd_criu_resume_svm\n\nThe cleanup tail of kfd_criu_resume_svm() walks\nsvms-\u003ecriu_svm_metadata_list and kfree()s each struct criu_svm_metadata\nwithout removing it from the list. The list head is left pointing at\nfreed kmalloc-96 objects.\n\nA second AMDKFD_IOC_CRIU_OP from the same process re-enters: list_empty()\nreads the dangling -\u003enext (use-after-free), the loop walks freed entries,\nand each is kfree()\u0027d again (double-free). This is reachable by an\nunprivileged render-group user via /dev/kfd with no capabilities required.\n\nAdd list_del() before the kfree() so the list is properly emptied. The\nlist_for_each_entry_safe() iterator already caches the next pointer, so\nunlinking during the walk is safe.\n\n(cherry picked from commit 6322d278a298e2c1430b9d2697743d3a04b788b1)"
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              "value": "AV:L - The bug is reached only via the local AMDKFD_IOC_CRIU_OP ioctl on /dev/kfd (unlocked_ioctl -\u003e kfd_ioctl_criu -\u003e criu_resume -\u003e kfd_criu_resume_svm); there is no network, adjacent-radio, or physical-device entry path.\nAC:L - An attacker who can open /dev/kfd controls the full CRIU restore/resume ioctl sequence and can deterministically trigger the bug by issuing KFD_CRIU_OP_RESUME twice after restore populates criu_svm_metadata_list; no uncontrollable race or rare layout is required.\nPR:L - The fix commit and ioctl path show exploitation by a local render-group user opening /dev/kfd; CAP_CHECKPOINT_RESTORE/SYS_ADMIN gates CRIU ioctls but are obtainable in a user namespace, matching basic local user privilege rather than init-namespace root only.\nUI:N - Exploitation requires only the attacker\u0027s own ioctl calls to /dev/kfd after CRIU restore; no victim click, mount, file open, or other interactive action is needed.\nS:U - Corruption is confined to kernel heap list metadata in amdkfd for the calling KFD process context; impact stays within the kernel security authority and does not cross a VM, IOMMU, or hypervisor boundary.\nC:H - After the first resume, list_empty() and list iteration dereference freed kmalloc-96 criu_svm_metadata objects (use-after-free reads of -\u003enext/list pointers), enabling attacker-influenced heap disclosure beyond a bounded leak.\nI:H - A second resume walks the corrupted list and kfree()s the same objects again (double-free on kmalloc-96 slabs), a standard exploitable kernel heap primitive for arbitrary memory corruption and potential privilege escalation.\nA:H - The use-after-free and double-free reliably corrupt kernel heap state and commonly cause BUG/KASAN faults, oops, or panic when the dangling list is traversed again, producing system-wide denial of service."
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          "url": "https://git.kernel.org/stable/c/8fa5655da368d0306c03e9dc9cda8ae2a7840926"
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    "cveId": "CVE-2026-72449",
    "datePublished": "2026-08-15T05:56:58.313Z",
    "dateReserved": "2026-08-09T03:40:39.931Z",
    "dateUpdated": "2026-08-17T05:44:18.630Z",
    "state": "PUBLISHED"
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    "redhat_vex": {
      "aggregate_severity": "Important",
      "current_release_date": "2026-08-19T17:25:22+00:00",
      "cve": "CVE-2026-72449",
      "id": "CVE-2026-72449",
      "initial_release_date": "2026-08-15T00:00:00+00:00",
      "product_status:known_affected": "232",
      "product_status:known_not_affected": "28",
      "product_status:under_investigation": "14",
      "source": "Red Hat CSAF VEX",
      "status": "final",
      "title": "kernel: drm/amdkfd: fix list_del corruption in kfd_criu_resume_svm",
      "url": "https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-72449.json",
      "version": "3"
    }
  }
}



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Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.

Sightings

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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.


Detection rules are retrieved from Rulezet.