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

Vulnerability from cvelistv5 – Published: 2026-09-16 10:31 – Updated: 2026-10-19 08:54
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
Linux CNA under the mitre root
CNA scorecard D 53/100 over 6637 records in the last 180 days details
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)
guessed Create a notification for this product.
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 , ≤ * (original_commit_for_fix)
guessed Create a notification for this product.
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{
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          "product": "Linux",
          "programFiles": [
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      "cpeApplicability": [
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      "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"
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          "url": "https://git.kernel.org/stable/c/5b58d8c206f37525c8217171e1f3e91dd2fa55e5"
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          "url": "https://git.kernel.org/stable/c/5e6f5bffaa80fc8ecce348ec0e34fed9d843e47e"
        },
        {
          "url": "https://git.kernel.org/stable/c/479aa6fa8c50f1052f1451326ef7d4d586d340c3"
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      ],
      "title": "media: rc: sunxi-cir: Unregister rc device on probe failure",
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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": "2026-10-19T08:54:16.454Z",
    "state": "PUBLISHED"
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  "dataVersion": "5.2",
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      "date": "2026-11-04",
      "epss": "0.00169",
      "percentile": "0.06255"
    },
    "microsoft_vex": {
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      "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",
      "product_status:under_investigation": "1",
      "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": "6"
    },
    "nvd": {
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            "affectedData": [
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                "defaultStatus": "unaffected",
                "product": "Linux",
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                ],
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                "programFiles": [
                  "drivers/media/rc/sunxi-cir.c"
                ],
                "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
                "vendor": "Linux",
                "versions": [
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          }
        ],
        "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": "2026-10-19T09:18:33.230",
        "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": [
          {
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            "url": "https://git.kernel.org/stable/c/4655a591478e4b31a3396695a2457daad9d4c899"
          },
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          },
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          },
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          },
          {
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          },
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            "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"
      }
    },
    "suse_vex": {
      "aggregate_severity": "moderate",
      "current_release_date": "2026-11-04T00:57:15Z",
      "cve": "CVE-2026-89883",
      "id": "CVE-2026-89883",
      "initial_release_date": "2026-09-17T16:36:05Z",
      "product_status:known_affected": "265",
      "product_status:known_not_affected": "0",
      "product_status:recommended": "69",
      "source": "SUSE CSAF VEX",
      "status": "interim",
      "title": "SUSE CVE CVE-2026-89883",
      "url": "https://ftp.suse.com/pub/projects/security/csaf-vex/2026/cve-2026-89883.json",
      "version": "7"
    }
  }
}



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How durations are calculated

Following the VTEM framework (Black Hat USA 2015), time to patch starts when the vendor or a coordinator was informed, total time to patch at discovery, and disclosure to patch at public disclosure; vendor response time runs from the report to its acknowledgement. Time to exploit and time unpatched start at the earliest discovery or report, falling back to public disclosure. Unpatched time ends at the first recorded patch, or the calculation time when no patch is recorded. Exploitation to patch shows the interval between those two events; a published proof of concept is a public exploit, not exploitation.

Each result shows its source dates. A negative interval means the end event came first; when date-only inputs leave the order open, the result says so. Date-only inputs are approximate. The earliest evidence wins: KEV report dates and sightings are labelled as such. Records describing another vulnerability are listed but never calculated from, and a PoC alone does not establish exploitation. Missing patch evidence does not prove that no patch exists. Filters below change the event list only.

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