CVE-2026-89883 (GCVE-0-2026-89883)

Vulnerability from cvelistv5 – Published: 2026-09-16 10:31 – Updated: 2026-09-16 14:39
VLAI
Title
media: rc: sunxi-cir: Unregister rc device on probe failure
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.
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: b4e3e59fb59c214c5bcf9d1bf2971f100e0dac4f , < 4655a591478e4b31a3396695a2457daad9d4c899 (git)
Affected: b4e3e59fb59c214c5bcf9d1bf2971f100e0dac4f , < 4efd7146dcf959afe64e9c51531cd8f82e60eab6 (git)
Affected: b4e3e59fb59c214c5bcf9d1bf2971f100e0dac4f , < 826763adbd8bd3137c5b3756650da473dc6216d5 (git)
Affected: b4e3e59fb59c214c5bcf9d1bf2971f100e0dac4f , < 59951b8a87ef4fb4b5b9409f70ba07663681a040 (git)
Affected: b4e3e59fb59c214c5bcf9d1bf2971f100e0dac4f , < 5b58d8c206f37525c8217171e1f3e91dd2fa55e5 (git)
Affected: b4e3e59fb59c214c5bcf9d1bf2971f100e0dac4f , < 5e6f5bffaa80fc8ecce348ec0e34fed9d843e47e (git)
Affected: b4e3e59fb59c214c5bcf9d1bf2971f100e0dac4f , < 479aa6fa8c50f1052f1451326ef7d4d586d340c3 (git)
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Linux Linux Affected: 3.17
Unaffected: 0 , < 3.17 (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: 6.18.51 , ≤ 6.18.* (semver)
Unaffected: 7.2.5 , ≤ 7.2.* (semver)
Unaffected: 7.3-rc1 , ≤ * (original_commit_for_fix)
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{
  "containers": {
    "cna": {
      "affected": [
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          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "drivers/media/rc/sunxi-cir.c"
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              "version": "7.2.5",
              "versionType": "semver"
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              "status": "unaffected",
              "version": "7.3-rc1",
              "versionType": "original_commit_for_fix"
            }
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        }
      ],
      "cpeApplicability": [
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          "nodes": [
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              "cpeMatch": [
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                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "5.15.221",
                  "versionStartIncluding": "3.17",
                  "vulnerable": true
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                  "versionStartIncluding": "3.17",
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                  "versionStartIncluding": "3.17",
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              "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": "2026-09-16T14:39:34.436Z",
        "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",
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        "engine": "bippy-1.2.0"
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  "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": "2026-09-16T14:39:34.436Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2",
  "vulnerability-lookup:meta": {
    "epss": {
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      "date": "2026-09-25",
      "epss": "0.00176",
      "percentile": "0.06314"
    },
    "microsoft_vex": {
      "current_release_date": "2026-09-24T01:42:34.000Z",
      "cve": "CVE-2026-89883",
      "id": "msrc_CVE-2026-89883",
      "initial_release_date": "2026-09-17T01:10:30.000Z",
      "product_status:fixed": "1",
      "product_status:known_affected": "2",
      "source": "Microsoft CSAF VEX",
      "status": "final",
      "title": "media: rc: sunxi-cir: Unregister rc device on probe failure",
      "url": "https://msrc.microsoft.com/csaf/vex/2026/msrc_cve-2026-89883.json",
      "version": "4"
    },
    "nvd": {
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                "product": "Linux",
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                ],
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                "vendor": "Linux",
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                "programFiles": [
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                "vendor": "Linux",
                "versions": [
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            "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
          }
        ],
        "cveTags": [],
        "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."
          }
        ],
        "id": "CVE-2026-89883",
        "lastModified": "2026-09-16T15:18:14.963",
        "metrics": {
          "cvssMetricV31": [
            {
              "cvssData": {
                "attackComplexity": "LOW",
                "attackVector": "LOCAL",
                "availabilityImpact": "HIGH",
                "baseScore": 7.8,
                "baseSeverity": "HIGH",
                "confidentialityImpact": "HIGH",
                "integrityImpact": "HIGH",
                "privilegesRequired": "LOW",
                "scope": "UNCHANGED",
                "userInteraction": "NONE",
                "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
                "version": "3.1"
              },
              "exploitabilityScore": 1.8,
              "impactScore": 5.9,
              "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
              "type": "Secondary"
            }
          ]
        },
        "published": "2026-09-16T11:16:56.753",
        "references": [
          {
            "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
            "url": "https://git.kernel.org/stable/c/4655a591478e4b31a3396695a2457daad9d4c899"
          },
          {
            "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
            "url": "https://git.kernel.org/stable/c/479aa6fa8c50f1052f1451326ef7d4d586d340c3"
          },
          {
            "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
            "url": "https://git.kernel.org/stable/c/4efd7146dcf959afe64e9c51531cd8f82e60eab6"
          },
          {
            "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
            "url": "https://git.kernel.org/stable/c/59951b8a87ef4fb4b5b9409f70ba07663681a040"
          },
          {
            "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
            "url": "https://git.kernel.org/stable/c/5b58d8c206f37525c8217171e1f3e91dd2fa55e5"
          },
          {
            "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
            "url": "https://git.kernel.org/stable/c/5e6f5bffaa80fc8ecce348ec0e34fed9d843e47e"
          },
          {
            "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
            "url": "https://git.kernel.org/stable/c/826763adbd8bd3137c5b3756650da473dc6216d5"
          }
        ],
        "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "vulnStatus": "Received"
      }
    }
  }
}



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  • 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.



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