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CVE-2026-89877

Estado: RecibidaAlta (8.4)—

In the Linux kernel, the following vulnerability has been resolved:

media: saa7164: fix cleanup on resource allocation failure

saa7164_dev_setup() adds the device to the global saa7164_devlist before requesting the PCI BAR memory regions.

If get_resources() fails, saa7164_dev_setup() decrements the device count and returns an error, but leaves the device on saa7164_devlist. The probe error path then frees the device, leaving a dangling entry on the global list.

Reuse the existing MMIO mapping error path to remove the device from saa7164_devlist and decrement the device count before returning.

Also release BAR0 if it was successfully requested but the BAR2 request fails.

CVSS

Probabilidad de explotación (EPSS)

EPSS (Exploit Prediction Scoring System, de FIRST) estima la probabilidad de que una vulnerabilidad sea explotada en 30 días. Complementa a CVSS (impacto) y a CISA KEV (explotación confirmada).

🎯 Técnicas ATT&CK

Cómo se explota esta vulnerabilidad y qué consigue el atacante, en el lenguaje de MITRE ATT&CK.

Vulnerabilidad local (AV:L, PR:N) en kernel Linux permite escalada de privilegios explotando fallo de limpieza de recursos; potencial DoS y corrupción de memoria en lista global.

Inferido por nuestro agente de análisis a partir de la descripción oficial, el vector CVSS y la CWE, y comprobado por un supervisor. Puede contener errores.

🛡️ Mitigaciones ATT&CK que cubren estas técnicas

Threat Intelligence ProgramRestrict File and Directory PermissionsRemote Data StorageFilter Network TrafficExecution PreventionEncrypt Sensitive Information

Tecnologías afectadas (1)

⚠ Inferidas por IA a partir de la descripción — NVD aún no ha analizado esta CVE; no son CPE verificados.

Linux — Linux KernelAI

Referencias

JSON original (NVD)

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{
  "id": "CVE-2026-89877",
  "cveTags": [],
  "metrics": {
    "cvssMetricV31": [
      {
        "type": "Secondary",
        "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "cvssData": {
          "scope": "UNCHANGED",
          "version": "3.1",
          "baseScore": 8.4,
          "attackVector": "LOCAL",
          "baseSeverity": "HIGH",
          "vectorString": "CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H",
          "integrityImpact": "HIGH",
          "userInteraction": "NONE",
          "attackComplexity": "LOW",
          "availabilityImpact": "HIGH",
          "privilegesRequired": "NONE",
          "confidentialityImpact": "HIGH"
        },
        "impactScore": 5.9,
        "exploitabilityScore": 2.5
      }
    ]
  },
  "affected": [
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "affectedData": [
        {
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "product": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "443c1228d50518f3c550e1fef490a2c9d9246ce7",
              "lessThan": "daa5b32cdf7db81a07ee2a91ce092a363e7754aa",
              "versionType": "git"
            },
            {
              "status": "affected",
              "version": "443c1228d50518f3c550e1fef490a2c9d9246ce7",
              "lessThan": "77f216f8de6221efb6f6c471bc9e598f1879825b",
              "versionType": "git"
            },
            {
              "status": "affected",
              "version": "443c1228d50518f3c550e1fef490a2c9d9246ce7",
              "lessThan": "69259c627009bf7621010ae9e997dad2dad3339c",
              "versionType": "git"
            },
            {
              "status": "affected",
              "version": "443c1228d50518f3c550e1fef490a2c9d9246ce7",
              "lessThan": "4d2048466af9e2c960c5be6dcd317e3b657d268b",
              "versionType": "git"
            },
            {
              "status": "affected",
              "version": "443c1228d50518f3c550e1fef490a2c9d9246ce7",
              "lessThan": "fc65623524b5bf23baddc6ae688d954fba0d5de2",
              "versionType": "git"
            },
            {
              "status": "affected",
              "version": "443c1228d50518f3c550e1fef490a2c9d9246ce7",
              "lessThan": "28e84c6e2e6753ed238ea097b2842a32a6a6879b",
              "versionType": "git"
            }
          ],
          "programFiles": [
            "drivers/media/pci/saa7164/saa7164-core.c"
          ],
          "defaultStatus": "unaffected"
        },
        {
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "product": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "2.6.32"
            },
            {
              "status": "unaffected",
              "version": "0",
              "lessThan": "2.6.32",
              "versionType": "semver"
            },
            {
              "status": "unaffected",
              "version": "6.1.188",
              "versionType": "semver",
              "lessThanOrEqual": "6.1.*"
            },
            {
              "status": "unaffected",
              "version": "6.6.157",
              "versionType": "semver",
              "lessThanOrEqual": "6.6.*"
            },
            {
              "status": "unaffected",
              "version": "6.12.110",
              "versionType": "semver",
              "lessThanOrEqual": "6.12.*"
            },
            {
              "status": "unaffected",
              "version": "6.18.51",
              "versionType": "semver",
              "lessThanOrEqual": "6.18.*"
            },
            {
              "status": "unaffected",
              "version": "7.2.5",
              "versionType": "semver",
              "lessThanOrEqual": "7.2.*"
            },
            {
              "status": "unaffected",
              "version": "7.3-rc1",
              "versionType": "original_commit_for_fix",
              "lessThanOrEqual": "*"
            }
          ],
          "programFiles": [
            "drivers/media/pci/saa7164/saa7164-core.c"
          ],
          "defaultStatus": "affected"
        }
      ]
    }
  ],
  "published": "2026-09-16T11:16:55.987",
  "references": [
    {
      "url": "https://git.kernel.org/stable/c/28e84c6e2e6753ed238ea097b2842a32a6a6879b",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    },
    {
      "url": "https://git.kernel.org/stable/c/4d2048466af9e2c960c5be6dcd317e3b657d268b",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    },
    {
      "url": "https://git.kernel.org/stable/c/69259c627009bf7621010ae9e997dad2dad3339c",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    },
    {
      "url": "https://git.kernel.org/stable/c/77f216f8de6221efb6f6c471bc9e598f1879825b",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    },
    {
      "url": "https://git.kernel.org/stable/c/daa5b32cdf7db81a07ee2a91ce092a363e7754aa",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    },
    {
      "url": "https://git.kernel.org/stable/c/fc65623524b5bf23baddc6ae688d954fba0d5de2",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    }
  ],
  "vulnStatus": "Received",
  "descriptions": [
    {
      "lang": "en",
      "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nmedia: saa7164: fix cleanup on resource allocation failure\n\nsaa7164_dev_setup() adds the device to the global saa7164_devlist before\nrequesting the PCI BAR memory regions.\n\nIf get_resources() fails, saa7164_dev_setup() decrements the device count\nand returns an error, but leaves the device on saa7164_devlist. The probe\nerror path then frees the device, leaving a dangling entry on the global\nlist.\n\nReuse the existing MMIO mapping error path to remove the device from\nsaa7164_devlist and decrement the device count before returning.\n\nAlso release BAR0 if it was successfully requested but the BAR2 request\nfails."
    }
  ],
  "lastModified": "2026-09-16T15:18:14.570",
  "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
}