CVE-2026-97548

Estado: RecibidaAlta (7.8)—

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

xfs: fix the rtrmap and rtrefcount _maxlevels_ondisk functions

The _maxlevels_ondisk functions are used to compute the size of in-memory btree cursors for each btree type. Unfortunately, LOLLM noticed that the rtrmap and rtrefcount versions of these functions forget to account for the inode root, which means that we could access beyond the end of the cursor given a sufficiently large btree. Fix this.

CVSS

Versión: 3.1
Vector: CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
Puntuación base: 7.8

Probabilidad de explotación (EPSS)

Probabilidad de explotación en los próximos 30 días: 0.17%
Percentil entre todas las CVEs puntuadas: 6
Fecha de la puntuación: 5/10/2026

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.

ExplotaciónT1203 Exploitation for Client Executionexecution75 %
Impacto principalT1543 Create or Modify System Processpersistence · privilege escalation45 %
Impacto secundarioT1499.004 Application or System Exploitationimpact40 %

Explotación corregida por reglas (vector CVSS): era T1068

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

User Account Management Restrict File and Directory Permissions Privileged Account Management Operating System Configuration Limit Software Installation Filter Network Traffic

Tecnologías afectadas (1)

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

Linux — Linux Kernel^AI

Referencias

JSON original (NVD)

Mostrar

{
  "id": "CVE-2026-97548",
  "cveTags": [],
  "metrics": {
    "cvssMetricV31": [
      {
        "type": "Secondary",
        "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "cvssData": {
          "scope": "UNCHANGED",
          "version": "3.1",
          "baseScore": 7.8,
          "attackVector": "LOCAL",
          "baseSeverity": "HIGH",
          "vectorString": "CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H",
          "integrityImpact": "HIGH",
          "userInteraction": "REQUIRED",
          "attackComplexity": "LOW",
          "availabilityImpact": "HIGH",
          "privilegesRequired": "NONE",
          "confidentialityImpact": "HIGH"
        },
        "impactScore": 5.9,
        "exploitabilityScore": 1.8
      }
    ]
  },
  "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": "9abe03a0e4f978615a2b1b484b8d09ca84c16ea0",
              "lessThan": "108114437915e61e8f88d1cbcc442c3f886a347e",
              "versionType": "git"
            },
            {
              "status": "affected",
              "version": "9abe03a0e4f978615a2b1b484b8d09ca84c16ea0",
              "lessThan": "84316cb25af95a60e655ccc8fe646bb5ad631b71",
              "versionType": "git"
            },
            {
              "status": "affected",
              "version": "9abe03a0e4f978615a2b1b484b8d09ca84c16ea0",
              "lessThan": "aa301322f72f82f26e4ba0826018d41388ab9896",
              "versionType": "git"
            }
          ],
          "programFiles": [
            "fs/xfs/libxfs/xfs_rtrefcount_btree.c",
            "fs/xfs/libxfs/xfs_rtrmap_btree.c"
          ],
          "defaultStatus": "unaffected"
        },
        {
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "product": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "6.14"
            },
            {
              "status": "unaffected",
              "version": "0",
              "lessThan": "6.14",
              "versionType": "semver"
            },
            {
              "status": "unaffected",
              "version": "6.18.53",
              "versionType": "semver",
              "lessThanOrEqual": "6.18.*"
            },
            {
              "status": "unaffected",
              "version": "7.2.7",
              "versionType": "semver",
              "lessThanOrEqual": "7.2.*"
            },
            {
              "status": "unaffected",
              "version": "7.3-rc3",
              "versionType": "original_commit_for_fix",
              "lessThanOrEqual": "*"
            }
          ],
          "programFiles": [
            "fs/xfs/libxfs/xfs_rtrefcount_btree.c",
            "fs/xfs/libxfs/xfs_rtrmap_btree.c"
          ],
          "defaultStatus": "affected"
        }
      ]
    }
  ],
  "published": "2026-09-25T11:17:05.183",
  "references": [
    {
      "url": "https://git.kernel.org/stable/c/108114437915e61e8f88d1cbcc442c3f886a347e",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    },
    {
      "url": "https://git.kernel.org/stable/c/84316cb25af95a60e655ccc8fe646bb5ad631b71",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    },
    {
      "url": "https://git.kernel.org/stable/c/aa301322f72f82f26e4ba0826018d41388ab9896",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    }
  ],
  "vulnStatus": "Received",
  "descriptions": [
    {
      "lang": "en",
      "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nxfs: fix the rtrmap and rtrefcount _maxlevels_ondisk functions\n\nThe _maxlevels_ondisk functions are used to compute the size of\nin-memory btree cursors for each btree type.  Unfortunately, LOLLM\nnoticed that the rtrmap and rtrefcount versions of these functions\nforget to account for the inode root, which means that we could access\nbeyond the end of the cursor given a sufficiently large btree.  Fix\nthis."
    }
  ],
  "lastModified": "2026-09-25T15:17:58.553",
  "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
}