CVE-2026-89883 (GCVE-0-2026-89883)
Vulnerability from cvelistv5
Published
2026-09-16 10:31
Modified
2026-10-19 08:54
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: media: rc: sunxi-cir: Unregister rc device on probe failure After rc_register_device() succeeds, later probe failures must undo the registration with rc_unregister_device(). The current error path jumps to the allocation cleanup label and only calls rc_free_device(), leaving the rc device registration and resources created by rc_register_device() behind. Add a registered-device unwind label for the IRQ lookup, IRQ request, and hardware initialization failure paths. Keep rc_free_device() for failures before rc_register_device() succeeds.
References
Impacted products
Vendor Product Version
Linux Linux Version: b4e3e59fb59c214c5bcf9d1bf2971f100e0dac4f
Version: b4e3e59fb59c214c5bcf9d1bf2971f100e0dac4f
Version: b4e3e59fb59c214c5bcf9d1bf2971f100e0dac4f
Version: b4e3e59fb59c214c5bcf9d1bf2971f100e0dac4f
Version: b4e3e59fb59c214c5bcf9d1bf2971f100e0dac4f
Version: b4e3e59fb59c214c5bcf9d1bf2971f100e0dac4f
Version: b4e3e59fb59c214c5bcf9d1bf2971f100e0dac4f
 Create a notification for this product.
Show details on NVD website

To clipboard 

{
  "containers": {
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "drivers/media/rc/sunxi-cir.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "lessThan": "4655a591478e4b31a3396695a2457daad9d4c899",
              "status": "affected",
              "version": "b4e3e59fb59c214c5bcf9d1bf2971f100e0dac4f",
              "versionType": "git"
            },
            {
              "lessThan": "4efd7146dcf959afe64e9c51531cd8f82e60eab6",
              "status": "affected",
              "version": "b4e3e59fb59c214c5bcf9d1bf2971f100e0dac4f",
              "versionType": "git"
            },
            {
              "lessThan": "826763adbd8bd3137c5b3756650da473dc6216d5",
              "status": "affected",
              "version": "b4e3e59fb59c214c5bcf9d1bf2971f100e0dac4f",
              "versionType": "git"
            },
            {
              "lessThan": "59951b8a87ef4fb4b5b9409f70ba07663681a040",
              "status": "affected",
              "version": "b4e3e59fb59c214c5bcf9d1bf2971f100e0dac4f",
              "versionType": "git"
            },
            {
              "lessThan": "5b58d8c206f37525c8217171e1f3e91dd2fa55e5",
              "status": "affected",
              "version": "b4e3e59fb59c214c5bcf9d1bf2971f100e0dac4f",
              "versionType": "git"
            },
            {
              "lessThan": "5e6f5bffaa80fc8ecce348ec0e34fed9d843e47e",
              "status": "affected",
              "version": "b4e3e59fb59c214c5bcf9d1bf2971f100e0dac4f",
              "versionType": "git"
            },
            {
              "lessThan": "479aa6fa8c50f1052f1451326ef7d4d586d340c3",
              "status": "affected",
              "version": "b4e3e59fb59c214c5bcf9d1bf2971f100e0dac4f",
              "versionType": "git"
            }
          ]
        },
        {
          "defaultStatus": "affected",
          "product": "Linux",
          "programFiles": [
            "drivers/media/rc/sunxi-cir.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "3.17"
            },
            {
              "lessThan": "3.17",
              "status": "unaffected",
              "version": "0",
              "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": "6.18.51",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "7.2.*",
              "status": "unaffected",
              "version": "7.2.5",
              "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": "5.15.221",
                  "versionStartIncluding": "3.17",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.1.188",
                  "versionStartIncluding": "3.17",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.6.157",
                  "versionStartIncluding": "3.17",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.12.110",
                  "versionStartIncluding": "3.17",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.18.51",
                  "versionStartIncluding": "3.17",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "7.2.5",
                  "versionStartIncluding": "3.17",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "7.3",
                  "versionStartIncluding": "3.17",
                  "vulnerable": true
                }
              ],
              "negate": false,
              "operator": "OR"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nmedia: rc: sunxi-cir: Unregister rc device on probe failure\n\nAfter rc_register_device() succeeds, later probe failures must undo the\nregistration with rc_unregister_device(). The current error path jumps to\nthe allocation cleanup label and only calls rc_free_device(), leaving the\nrc device registration and resources created by rc_register_device()\nbehind.\n\nAdd a registered-device unwind label for the IRQ lookup, IRQ request, and\nhardware initialization failure paths. Keep rc_free_device() for failures\nbefore rc_register_device() succeeds."
        }
      ],
      "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 bug is in sunxi_ir_probe() of the Allwinner CIR platform driver; after a failed probe the leftover rc-core/lirc/input device is reached by opening local /dev/lirc* or /dev/input/event* nodes, not via network packets, Bluetooth, or IR/USB injection.\nAC:L - After rc_register_device() succeeds, IRQ lookup (including -EPROBE_DEFER), request_irq, or sunxi_ir_hw_init failure calls only rc_free_device(); once the leaked rc/lirc node exists, LIRC_SET_REC_TIMEOUT and similar ioctls deterministically use dangling rc_dev-\u003epriv with no attacker-uncontrollable race.\nPR:L - A low-privileged local user who can open the leaked /dev/lirc* or input event node (typical input-group/udev access on Allwinner STBs, tablets, and SBCs) can ioctl the leftover rc device; bind/unbind is CAP_SYS_ADMIN, but the higher-severity scenario is exploiting an already leaked node.\nUI:N - The attacker opens the leftover lirc or input device and issues ioctls themselves; no victim must mount a filesystem, plug a device, or otherwise interact.\nS:U - Use-after-free of the probe-owned sunxi_ir object and leftover rc-core state stays in the host kernel and does not cross a VM, IOMMU, or sandbox boundary.\nC:H - Failed probe leaves the rc device registered while devres frees the sunxi_ir object that rc_dev-\u003epriv still points at, a slab use-after-free; per kernel CVSS guidance that primitive enables arbitrary kernel read.\nI:H - sunxi_ir_set_timeout() performs CIR MMIO writes through freed ir-\u003ebase, and leftover s_timeout/ir_raw callbacks can be redirected after heap reuse, yielding arbitrary write and control-flow hijack.\nA:H - Using the leftover lirc/input node dereferences freed sunxi_ir state or writes unmapped CIR MMIO, causing kernel oops/panic; any use-after-free is high availability impact."
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-10-19T08:54:16.454Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
      "references": [
        {
          "url": "https://git.kernel.org/stable/c/4655a591478e4b31a3396695a2457daad9d4c899"
        },
        {
          "url": "https://git.kernel.org/stable/c/4efd7146dcf959afe64e9c51531cd8f82e60eab6"
        },
        {
          "url": "https://git.kernel.org/stable/c/826763adbd8bd3137c5b3756650da473dc6216d5"
        },
        {
          "url": "https://git.kernel.org/stable/c/59951b8a87ef4fb4b5b9409f70ba07663681a040"
        },
        {
          "url": "https://git.kernel.org/stable/c/5b58d8c206f37525c8217171e1f3e91dd2fa55e5"
        },
        {
          "url": "https://git.kernel.org/stable/c/5e6f5bffaa80fc8ecce348ec0e34fed9d843e47e"
        },
        {
          "url": "https://git.kernel.org/stable/c/479aa6fa8c50f1052f1451326ef7d4d586d340c3"
        }
      ],
      "title": "media: rc: sunxi-cir: Unregister rc device on probe failure",
      "x_generator": {
        "engine": "bippy-1.2.0"
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "cveId": "CVE-2026-89883",
    "datePublished": "2026-09-16T10:31:48.378Z",
    "dateReserved": "2026-09-11T19:38:34.772Z",
    "dateUpdated": "2026-10-19T08:54:16.454Z",
    "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.