CVE-2026-81008 (GCVE-0-2026-81008)
Vulnerability from cvelistv5
Published
2026-09-11 19:42
Modified
2026-10-19 08:46
Severity ?
7.8 (High) - CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Summary
In the Linux kernel, the following vulnerability has been resolved: interconnect: Fix use after free in icc_get() and of_icc_get_by_index() In of_icc_get_by_index() and icc_get(), if the dynamic allocation for path->name fails via kasprintf(), the error handling path directly calls kfree(path) to free the path object and returns an error. However, prior to this point, path_find() calls path_init(), which already links the path's requests into the req_list of the respective interconnect nodes via hlist_add_head(). Directly invoking kfree(path) leaves dangling pointers in the hlist. A subsequent call to icc_get() or icc_set_bw() will traverse or modify these corrupted lists, triggering a slab use afterfree. KASAN report showing the vulnerability when reproducing via debugfs: BUG: KASAN: slab-use-after-free in path_find+0x6f8/0xcfc Write of size 8 at addr fff000000d43f748 by task sh/1 ... Call trace: kasan_report+0xac/0xfc path_find+0x6f8/0xcfc icc_get+0x148/0x380 icc_get_set+0xf8/0x2d0 ... Freed by task 1: kfree+0x1a0/0x4a4 icc_get+0x2cc/0x380 icc_get_set+0xf8/0x2d0 Fix this by replacing kfree(path) with the proper teardown function, icc_put(path), which safely removes the requests from the req_list using hlist_del() and drops the provider usage references before freeing the memory. Additionally, in icc_get(), ensure that the icc_lock mutex is released prior to calling icc_put(path) to avoid a deadlock, as icc_put() internally acquires the same lock.
References
Impacted products
Vendor Product Version
Linux Linux Version: 3791163602f7140011a8dc1691cfe6ec0cb1ef07
Version: 3791163602f7140011a8dc1691cfe6ec0cb1ef07
Version: 3791163602f7140011a8dc1691cfe6ec0cb1ef07
Version: 3791163602f7140011a8dc1691cfe6ec0cb1ef07
Version: 3791163602f7140011a8dc1691cfe6ec0cb1ef07
Version: 3791163602f7140011a8dc1691cfe6ec0cb1ef07
Version: 3791163602f7140011a8dc1691cfe6ec0cb1ef07
Version: 3791163602f7140011a8dc1691cfe6ec0cb1ef07
 Create a notification for this product.
Show details on NVD website

To clipboard 

{
  "containers": {
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "drivers/interconnect/core.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "lessThan": "03c3af594dea9196cf6ca70d914b42aa8c873c35",
              "status": "affected",
              "version": "3791163602f7140011a8dc1691cfe6ec0cb1ef07",
              "versionType": "git"
            },
            {
              "lessThan": "d4d73decdb9a44a248b1cbd04ed6f334df544d9c",
              "status": "affected",
              "version": "3791163602f7140011a8dc1691cfe6ec0cb1ef07",
              "versionType": "git"
            },
            {
              "lessThan": "9a671125d4228357e5b929733c4593d27a273749",
              "status": "affected",
              "version": "3791163602f7140011a8dc1691cfe6ec0cb1ef07",
              "versionType": "git"
            },
            {
              "lessThan": "fedea72e8f312fe7d0c6cb19353e61d2d5643b11",
              "status": "affected",
              "version": "3791163602f7140011a8dc1691cfe6ec0cb1ef07",
              "versionType": "git"
            },
            {
              "lessThan": "a4e9aa7907ade87d1d96853d14e05dcf682f8363",
              "status": "affected",
              "version": "3791163602f7140011a8dc1691cfe6ec0cb1ef07",
              "versionType": "git"
            },
            {
              "lessThan": "db8147c5d5ad2cfa21c2be566f95981b41b05de6",
              "status": "affected",
              "version": "3791163602f7140011a8dc1691cfe6ec0cb1ef07",
              "versionType": "git"
            },
            {
              "lessThan": "d715d19cfcfe99f361adb05cefc143a95d400b87",
              "status": "affected",
              "version": "3791163602f7140011a8dc1691cfe6ec0cb1ef07",
              "versionType": "git"
            },
            {
              "lessThan": "25c7e242aca084fdc1098248194032317dca625d",
              "status": "affected",
              "version": "3791163602f7140011a8dc1691cfe6ec0cb1ef07",
              "versionType": "git"
            }
          ]
        },
        {
          "defaultStatus": "affected",
          "product": "Linux",
          "programFiles": [
            "drivers/interconnect/core.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "5.6"
            },
            {
              "lessThan": "5.6",
              "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": "6.12.109",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.18.*",
              "status": "unaffected",
              "version": "6.18.50",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "7.2.*",
              "status": "unaffected",
              "version": "7.2.4",
              "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": "5.6",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "5.15.221",
                  "versionStartIncluding": "5.6",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.1.188",
                  "versionStartIncluding": "5.6",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.6.157",
                  "versionStartIncluding": "5.6",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.12.109",
                  "versionStartIncluding": "5.6",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.18.50",
                  "versionStartIncluding": "5.6",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "7.2.4",
                  "versionStartIncluding": "5.6",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "7.3",
                  "versionStartIncluding": "5.6",
                  "vulnerable": true
                }
              ],
              "negate": false,
              "operator": "OR"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\ninterconnect: Fix use after free in icc_get() and of_icc_get_by_index()\n\nIn of_icc_get_by_index() and icc_get(), if the dynamic allocation for\npath-\u003ename fails via kasprintf(), the error handling path directly\ncalls kfree(path) to free the path object and returns an error.\n\nHowever, prior to this point, path_find() calls path_init(), which\nalready links the path\u0027s requests into the req_list of the respective\ninterconnect nodes via hlist_add_head(). Directly invoking kfree(path)\nleaves dangling pointers in the hlist. A subsequent call to icc_get()\nor icc_set_bw() will traverse or modify these corrupted lists, triggering\na slab use afterfree.\n\nKASAN report showing the vulnerability when reproducing via debugfs:\n\n  BUG: KASAN: slab-use-after-free in path_find+0x6f8/0xcfc\n  Write of size 8 at addr fff000000d43f748 by task sh/1\n  ...\n  Call trace:\n   kasan_report+0xac/0xfc\n   path_find+0x6f8/0xcfc\n   icc_get+0x148/0x380\n   icc_get_set+0xf8/0x2d0\n  ...\n  Freed by task 1:\n   kfree+0x1a0/0x4a4\n   icc_get+0x2cc/0x380\n   icc_get_set+0xf8/0x2d0\n\nFix this by replacing kfree(path) with the proper teardown function,\nicc_put(path), which safely removes the requests from the req_list using\nhlist_del() and drops the provider usage references before freeing the\nmemory.\n\nAdditionally, in icc_get(), ensure that the icc_lock mutex is released\nprior to calling icc_put(path) to avoid a deadlock, as icc_put()\ninternally acquires the same lock."
        }
      ],
      "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 - The interconnect core is an on-chip SoC bandwidth API. of_icc_get_by_index() runs from local consumer-driver probe (Qualcomm GPU, venus/camera, UFS, USB, OPP on Android/embedded) and icc_get() from the optional debugfs test client; no network or adjacent protocol handler reaches this code.\nAC:L - Once kasprintf() fails after path_init() has linked path-\u003ereqs into node req_lists, the dangling hlist pointers persist and the next icc_set_bw()/path_find() is a deterministic UAF, not a race. A local attacker can force the GFP_KERNEL name allocation to fail with memory pressure and retry via driver rebind, module load, or deferred probe.\nPR:L - After the error path plants dangling req_list entries, an ordinary local/Android user triggers the UAF through icc_set_bw() via V4L2, DRM render nodes, or block I/O on already-probed consumers that share interconnect nodes. of_icc_get() itself runs from consumer probe/rebind whose privilege gating is ambiguous, so Low applies.\nUI:N - The attacker induces memory pressure and device activity (or a rebind/probe) from their own process. No separate victim action such as mounting a filesystem or opening a file is required.\nS:U - The UAF corrupts kernel heap objects and interconnect provider state in the host kernel. This is standard kernel privilege escalation and does not cross a VM, IOMMU, or sandbox security boundary.\nC:H - This is a slab use-after-free of struct icc_path whose embedded icc_req hlist nodes remain on node-\u003ereq_list. aggregate_requests() and the interconnect debugfs summary read enabled/tag/avg_bw/peak_bw and r-\u003edev from the freed object, so heap reuse yields an arbitrary kernel read primitive.\nI:H - path_find() hlist_add_head() performs an 8-byte write through the dangling first pointer into freed memory, and a sprayed next pointer hijacks later list walks. apply_constraints() then programs attacker-controlled bandwidth into interconnect hardware, giving a UAF write/control-flow primitive.\nA:H - Walking LIST_POISON or a dangling req_node in aggregate_requests() or path_find() oopses or panics the kernel. Any use-after-free is High availability impact even when not fully turned into code execution."
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-10-19T08:46:33.532Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
      "references": [
        {
          "url": "https://git.kernel.org/stable/c/03c3af594dea9196cf6ca70d914b42aa8c873c35"
        },
        {
          "url": "https://git.kernel.org/stable/c/d4d73decdb9a44a248b1cbd04ed6f334df544d9c"
        },
        {
          "url": "https://git.kernel.org/stable/c/9a671125d4228357e5b929733c4593d27a273749"
        },
        {
          "url": "https://git.kernel.org/stable/c/fedea72e8f312fe7d0c6cb19353e61d2d5643b11"
        },
        {
          "url": "https://git.kernel.org/stable/c/a4e9aa7907ade87d1d96853d14e05dcf682f8363"
        },
        {
          "url": "https://git.kernel.org/stable/c/db8147c5d5ad2cfa21c2be566f95981b41b05de6"
        },
        {
          "url": "https://git.kernel.org/stable/c/d715d19cfcfe99f361adb05cefc143a95d400b87"
        },
        {
          "url": "https://git.kernel.org/stable/c/25c7e242aca084fdc1098248194032317dca625d"
        }
      ],
      "title": "interconnect: Fix use after free in icc_get() and of_icc_get_by_index()",
      "x_generator": {
        "engine": "bippy-1.2.0"
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "cveId": "CVE-2026-81008",
    "datePublished": "2026-09-11T19:42:59.405Z",
    "dateReserved": "2026-08-26T14:34:25.812Z",
    "dateUpdated": "2026-10-19T08:46:33.532Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}


Log in or create an account to share your comment.




Tags
Taxonomy of the tags.




Sightings

Author Source Type Date

Nomenclature

  • Seen: The vulnerability was mentioned, discussed, or seen somewhere by the user.
  • Confirmed: The vulnerability is confirmed from an analyst perspective.
  • Published Proof of Concept: A public proof of concept is available for this vulnerability.
  • Exploited: This vulnerability was exploited and seen by the user reporting the sighting.
  • Patched: This vulnerability was successfully patched by the user reporting the sighting.
  • Not exploited: This vulnerability was not exploited or seen by the user reporting the sighting.
  • Not confirmed: The user expresses doubt about the veracity of the vulnerability.
  • Not patched: This vulnerability was not successfully patched by the user reporting the sighting.