FKIE_CVE-2026-46303

Vulnerability from fkie_nvd - Published: 2026-06-08 17:16 - Updated: 2026-06-17 10:53
Severity
8.2 (High) - CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:L/A:N
Summary
In the Linux kernel, the following vulnerability has been resolved: isofs: validate Rock Ridge CE continuation extent against volume size rock_continue() reads rs->cont_extent verbatim from the Rock Ridge CE record and passes it to sb_bread() without checking that the block number is within the mounted ISO 9660 volume. commit e595447e177b ("[PATCH] rock.c: handle corrupted directories") added cont_offset and cont_size rejection for the CE continuation but did not validate the extent block number itself. commit f54e18f1b831 ("isofs: Fix infinite looping over CE entries") later capped the CE chain length at RR_MAX_CE_ENTRIES = 32 but again left the block number unchecked. With a crafted ISO mounted via udisks2 (desktop optical auto-mount) or via CAP_SYS_ADMIN mount, rs->cont_extent can therefore point at an out-of-range block or at blocks belonging to an adjacent filesystem on the same block device. sb_bread() on an out-of-range block returns NULL cleanly via the block layer EIO path, so there is no memory-safety violation. For in-range reads of adjacent- filesystem data, the CE buffer is parsed as Rock Ridge records and only the text of SL sub-records reaches userspace through readlink(), which makes the info-leak channel narrow and difficult to exploit; still, rejecting the malformed CE outright matches the rejection shape already present in the same function for cont_offset and cont_size. Add an ISOFS_SB(sb)->s_nzones bounds check to rock_continue() next to the existing offset/size rejection, printing the same corrupted-directory-entry notice.
References
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/22b36fa081f38ab397c7697f9d539211b51a0cfc
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/8356fb821016797f5677cbeee5ddc0d32a95b4be
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/a36d990f591320e9dd379ab30063ebfe91d47e1f
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/bf1bc673c587f5ef7e9c09b94aea7c5a7847d4d9
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/c9b37c8b73f6368e4750e5ccb0632c380b43c6e5
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/d582e12378bc1637f337622feef762f53c43fd57
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/e69da8eeab74b4f4505024c38a17bce060fe7df8
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/ef048470c90bc8c1b8318bb2ce329da9ef64b9fe
Impacted products
Vendor Product Version
To clipboard 

{
  "affected": [
    {
      "affectedData": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "fs/isofs/rock.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "lessThan": "8356fb821016797f5677cbeee5ddc0d32a95b4be",
              "status": "affected",
              "version": "f54e18f1b831c92f6512d2eedb224cd63d607d3d",
              "versionType": "git"
            },
            {
              "lessThan": "d582e12378bc1637f337622feef762f53c43fd57",
              "status": "affected",
              "version": "f54e18f1b831c92f6512d2eedb224cd63d607d3d",
              "versionType": "git"
            },
            {
              "lessThan": "bf1bc673c587f5ef7e9c09b94aea7c5a7847d4d9",
              "status": "affected",
              "version": "f54e18f1b831c92f6512d2eedb224cd63d607d3d",
              "versionType": "git"
            },
            {
              "lessThan": "c9b37c8b73f6368e4750e5ccb0632c380b43c6e5",
              "status": "affected",
              "version": "f54e18f1b831c92f6512d2eedb224cd63d607d3d",
              "versionType": "git"
            },
            {
              "lessThan": "22b36fa081f38ab397c7697f9d539211b51a0cfc",
              "status": "affected",
              "version": "f54e18f1b831c92f6512d2eedb224cd63d607d3d",
              "versionType": "git"
            },
            {
              "lessThan": "e69da8eeab74b4f4505024c38a17bce060fe7df8",
              "status": "affected",
              "version": "f54e18f1b831c92f6512d2eedb224cd63d607d3d",
              "versionType": "git"
            },
            {
              "lessThan": "ef048470c90bc8c1b8318bb2ce329da9ef64b9fe",
              "status": "affected",
              "version": "f54e18f1b831c92f6512d2eedb224cd63d607d3d",
              "versionType": "git"
            },
            {
              "lessThan": "a36d990f591320e9dd379ab30063ebfe91d47e1f",
              "status": "affected",
              "version": "f54e18f1b831c92f6512d2eedb224cd63d607d3d",
              "versionType": "git"
            },
            {
              "status": "affected",
              "version": "08313e26e06d4aa9ce1cbba1a8e359e9cab9ad56",
              "versionType": "git"
            },
            {
              "status": "affected",
              "version": "212c4d33ca83e2144064fe9c2911607fbed5386f",
              "versionType": "git"
            },
            {
              "status": "affected",
              "version": "96e44adce250199ec9b2b928be66365779ff1b59",
              "versionType": "git"
            },
            {
              "status": "affected",
              "version": "1fe5620fcd6c2f0a4a927ee10c8e53196da392f3",
              "versionType": "git"
            },
            {
              "status": "affected",
              "version": "fbce0d7dc8965c9fb8d411862040239d4a768c71",
              "versionType": "git"
            },
            {
              "status": "affected",
              "version": "8190393a88f2b0321263a54f2a9eb5a2aa43be7e",
              "versionType": "git"
            },
            {
              "status": "affected",
              "version": "486aa789eadcf44ed87f972b209299c516454693",
              "versionType": "git"
            },
            {
              "status": "affected",
              "version": "b6d20edb6e7cedb4eedb9e0193d20dd488ebae84",
              "versionType": "git"
            },
            {
              "lessThan": "2.6.33",
              "status": "affected",
              "version": "2.6.32.66",
              "versionType": "semver"
            },
            {
              "lessThan": "3.3",
              "status": "affected",
              "version": "3.2.67",
              "versionType": "semver"
            },
            {
              "lessThan": "3.5",
              "status": "affected",
              "version": "3.4.107",
              "versionType": "semver"
            },
            {
              "lessThan": "3.11",
              "status": "affected",
              "version": "3.10.64",
              "versionType": "semver"
            },
            {
              "lessThan": "3.13",
              "status": "affected",
              "version": "3.12.36",
              "versionType": "semver"
            },
            {
              "lessThan": "3.15",
              "status": "affected",
              "version": "3.14.28",
              "versionType": "semver"
            },
            {
              "lessThan": "3.18",
              "status": "affected",
              "version": "3.17.8",
              "versionType": "semver"
            },
            {
              "lessThan": "3.19",
              "status": "affected",
              "version": "3.18.2",
              "versionType": "semver"
            }
          ]
        },
        {
          "defaultStatus": "affected",
          "product": "Linux",
          "programFiles": [
            "fs/isofs/rock.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "3.19"
            },
            {
              "lessThan": "3.19",
              "status": "unaffected",
              "version": "0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "5.10.*",
              "status": "unaffected",
              "version": "5.10.258",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "5.15.*",
              "status": "unaffected",
              "version": "5.15.209",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.1.*",
              "status": "unaffected",
              "version": "6.1.175",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.6.*",
              "status": "unaffected",
              "version": "6.6.140",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.12.*",
              "status": "unaffected",
              "version": "6.12.88",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.18.*",
              "status": "unaffected",
              "version": "6.18.30",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "7.0.*",
              "status": "unaffected",
              "version": "7.0.7",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "*",
              "status": "unaffected",
              "version": "7.1",
              "versionType": "original_commit_for_fix"
            }
          ]
        }
      ],
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    }
  ],
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nisofs: validate Rock Ridge CE continuation extent against volume size\n\nrock_continue() reads rs-\u003econt_extent verbatim from the Rock Ridge CE\nrecord and passes it to sb_bread() without checking that the block\nnumber is within the mounted ISO 9660 volume.  commit e595447e177b\n(\"[PATCH] rock.c: handle corrupted directories\") added cont_offset\nand cont_size rejection for the CE continuation but did not validate\nthe extent block number itself.  commit f54e18f1b831 (\"isofs: Fix\ninfinite looping over CE entries\") later capped the CE chain length\nat RR_MAX_CE_ENTRIES = 32 but again left the block number unchecked.\n\nWith a crafted ISO mounted via udisks2 (desktop optical auto-mount)\nor via CAP_SYS_ADMIN mount, rs-\u003econt_extent can therefore point at\nan out-of-range block or at blocks belonging to an adjacent\nfilesystem on the same block device.  sb_bread() on an out-of-range\nblock returns NULL cleanly via the block layer EIO path, so there\nis no memory-safety violation.  For in-range reads of adjacent-\nfilesystem data, the CE buffer is parsed as Rock Ridge records and\nonly the text of SL sub-records reaches userspace through\nreadlink(), which makes the info-leak channel narrow and difficult\nto exploit; still, rejecting the malformed CE outright matches the\nrejection shape already present in the same function for\ncont_offset and cont_size.\n\nAdd an ISOFS_SB(sb)-\u003es_nzones bounds check to rock_continue() next\nto the existing offset/size rejection, printing the same\ncorrupted-directory-entry notice."
    }
  ],
  "id": "CVE-2026-46303",
  "lastModified": "2026-06-17T10:53:31.743",
  "metrics": {
    "cvssMetricV31": [
      {
        "cvssData": {
          "attackComplexity": "LOW",
          "attackVector": "NETWORK",
          "availabilityImpact": "NONE",
          "baseScore": 8.2,
          "baseSeverity": "HIGH",
          "confidentialityImpact": "HIGH",
          "integrityImpact": "LOW",
          "privilegesRequired": "NONE",
          "scope": "UNCHANGED",
          "userInteraction": "NONE",
          "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:L/A:N",
          "version": "3.1"
        },
        "exploitabilityScore": 3.9,
        "impactScore": 4.2,
        "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "type": "Secondary"
      }
    ]
  },
  "published": "2026-06-08T17:16:48.853",
  "references": [
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/22b36fa081f38ab397c7697f9d539211b51a0cfc"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/8356fb821016797f5677cbeee5ddc0d32a95b4be"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/a36d990f591320e9dd379ab30063ebfe91d47e1f"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/bf1bc673c587f5ef7e9c09b94aea7c5a7847d4d9"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/c9b37c8b73f6368e4750e5ccb0632c380b43c6e5"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/d582e12378bc1637f337622feef762f53c43fd57"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/e69da8eeab74b4f4505024c38a17bce060fe7df8"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/ef048470c90bc8c1b8318bb2ce329da9ef64b9fe"
    }
  ],
  "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
  "vulnStatus": "Received"
}


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