Vulnerability-Lookup

FKIE_CVE-2026-63818

Vulnerability from fkie_nvd - Published: 2026-07-19 12:16 - Updated: 2026-08-17 05:17

Severity

8.4 (High) - CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Summary

In the Linux kernel, the following vulnerability has been resolved: f2fs: validate orphan inode entry count f2fs_recover_orphan_inodes() trusts the orphan block entry_count when replaying orphan inodes from the checkpoint pack. A corrupted entry_count larger than F2FS_ORPHANS_PER_BLOCK makes the recovery loop read past the ino[] array and interpret footer or following data as inode numbers. On a crafted image, mounting an unpatched kernel can drive orphan recovery into f2fs_bug_on() and panic the kernel. Validate entry_count before consuming entries so corrupted checkpoint data fails the mount with -EFSCORRUPTED and requests fsck instead. Set ERROR_INCONSISTENT_ORPHAN as well, so the corruption reason can be recorded in the superblock s_errors[] field. This gives fsck a persistent hint even though mount-time orphan recovery failure may leave no chance to persist SBI_NEED_FSCK through a checkpoint.

References

	URL	Tags
	416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/210c210c92d78fdf5051bc55c5c69044b1a2150a
	416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/2e12381d4495dc8b0ff042c6856022b2e359835c
	416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/550511a2470f6d204fa07b331f048bd2d3c51280
	416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/846c499a65816d13f1186e3090e825e8bb8bcb8b
	416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/8aad54746c251f2c2370118df766c0c82e2d2091
	416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/ad101d15716f5a24d1fa82a849f80430c805a3dd
	416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/d18c81f5d0ecd5796aa47d66d98f2dd54d8d0f70
	416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/d2f236196d542ccd8505736e41c3a1d3f0305f6f

Impacted products

	Vendor	Product	Version

JSON

To clipboard

{
  "affected": [
    {
      "affectedData": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "fs/f2fs/checkpoint.c",
            "include/linux/f2fs_fs.h"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "lessThan": "210c210c92d78fdf5051bc55c5c69044b1a2150a",
              "status": "affected",
              "version": "127e670abfa7fa150f6550d620ded930f5bdb4e7",
              "versionType": "git"
            },
            {
              "lessThan": "ad101d15716f5a24d1fa82a849f80430c805a3dd",
              "status": "affected",
              "version": "127e670abfa7fa150f6550d620ded930f5bdb4e7",
              "versionType": "git"
            },
            {
              "lessThan": "d18c81f5d0ecd5796aa47d66d98f2dd54d8d0f70",
              "status": "affected",
              "version": "127e670abfa7fa150f6550d620ded930f5bdb4e7",
              "versionType": "git"
            },
            {
              "lessThan": "d2f236196d542ccd8505736e41c3a1d3f0305f6f",
              "status": "affected",
              "version": "127e670abfa7fa150f6550d620ded930f5bdb4e7",
              "versionType": "git"
            },
            {
              "lessThan": "550511a2470f6d204fa07b331f048bd2d3c51280",
              "status": "affected",
              "version": "127e670abfa7fa150f6550d620ded930f5bdb4e7",
              "versionType": "git"
            },
            {
              "lessThan": "8aad54746c251f2c2370118df766c0c82e2d2091",
              "status": "affected",
              "version": "127e670abfa7fa150f6550d620ded930f5bdb4e7",
              "versionType": "git"
            },
            {
              "lessThan": "2e12381d4495dc8b0ff042c6856022b2e359835c",
              "status": "affected",
              "version": "127e670abfa7fa150f6550d620ded930f5bdb4e7",
              "versionType": "git"
            },
            {
              "lessThan": "846c499a65816d13f1186e3090e825e8bb8bcb8b",
              "status": "affected",
              "version": "127e670abfa7fa150f6550d620ded930f5bdb4e7",
              "versionType": "git"
            }
          ]
        },
        {
          "defaultStatus": "affected",
          "product": "Linux",
          "programFiles": [
            "fs/f2fs/checkpoint.c",
            "include/linux/f2fs_fs.h"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "3.8"
            },
            {
              "lessThan": "3.8",
              "status": "unaffected",
              "version": "0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "5.10.*",
              "status": "unaffected",
              "version": "5.10.261",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "5.15.*",
              "status": "unaffected",
              "version": "5.15.212",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.1.*",
              "status": "unaffected",
              "version": "6.1.178",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.6.*",
              "status": "unaffected",
              "version": "6.6.145",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.12.*",
              "status": "unaffected",
              "version": "6.12.96",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.18.*",
              "status": "unaffected",
              "version": "6.18.38",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "7.1.*",
              "status": "unaffected",
              "version": "7.1.3",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "*",
              "status": "unaffected",
              "version": "7.2",
              "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\nf2fs: validate orphan inode entry count\n\nf2fs_recover_orphan_inodes() trusts the orphan block entry_count when\nreplaying orphan inodes from the checkpoint pack. A corrupted entry_count\nlarger than F2FS_ORPHANS_PER_BLOCK makes the recovery loop read past the\nino[] array and interpret footer or following data as inode numbers.\n\nOn a crafted image, mounting an unpatched kernel can drive orphan recovery\ninto f2fs_bug_on() and panic the kernel. Validate entry_count before\nconsuming entries so corrupted checkpoint data fails the mount with\n-EFSCORRUPTED and requests fsck instead.\n\nSet ERROR_INCONSISTENT_ORPHAN as well, so the corruption reason can be\nrecorded in the superblock s_errors[] field. This gives fsck a persistent\nhint even though mount-time orphan recovery failure may leave no chance to\npersist SBI_NEED_FSCK through a checkpoint."
    }
  ],
  "id": "CVE-2026-63818",
  "lastModified": "2026-08-17T05:17:19.143",
  "metrics": {
    "cvssMetricV31": [
      {
        "cvssData": {
          "attackComplexity": "LOW",
          "attackVector": "LOCAL",
          "availabilityImpact": "HIGH",
          "baseScore": 8.4,
          "baseSeverity": "HIGH",
          "confidentialityImpact": "HIGH",
          "integrityImpact": "HIGH",
          "privilegesRequired": "NONE",
          "scope": "UNCHANGED",
          "userInteraction": "NONE",
          "vectorString": "CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H",
          "version": "3.1"
        },
        "exploitabilityScore": 2.5,
        "impactScore": 5.9,
        "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "type": "Secondary"
      }
    ]
  },
  "published": "2026-07-19T12:16:54.873",
  "references": [
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/210c210c92d78fdf5051bc55c5c69044b1a2150a"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/2e12381d4495dc8b0ff042c6856022b2e359835c"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/550511a2470f6d204fa07b331f048bd2d3c51280"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/846c499a65816d13f1186e3090e825e8bb8bcb8b"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/8aad54746c251f2c2370118df766c0c82e2d2091"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/ad101d15716f5a24d1fa82a849f80430c805a3dd"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/d18c81f5d0ecd5796aa47d66d98f2dd54d8d0f70"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/d2f236196d542ccd8505736e41c3a1d3f0305f6f"
    }
  ],
  "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
  "vulnStatus": "Awaiting Analysis"
}

CVE-2026-63818 (GCVE-0-2026-63818)

Vulnerability from cvelistv5 – Published: 2026-07-19 12:02 – Updated: 2026-08-17 04:51

Title

f2fs: validate orphan inode entry count

Summary

Severity

8.4 (High)


                        
                          CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Assigner

Linux mitre root

References

8 references

URL	Tags
https://git.kernel.org/stable/c/210c210c92d78fdf5…
https://git.kernel.org/stable/c/ad101d15716f5a24d…
https://git.kernel.org/stable/c/d18c81f5d0ecd5796…
https://git.kernel.org/stable/c/d2f236196d542ccd8…
https://git.kernel.org/stable/c/550511a2470f6d204…
https://git.kernel.org/stable/c/8aad54746c251f2c2…
https://git.kernel.org/stable/c/2e12381d4495dc8b0…
https://git.kernel.org/stable/c/846c499a65816d13f…

Impacted products

2 products

Vendor	Product	Version
Linux	Linux	Affected: 127e670abfa7fa150f6550d620ded930f5bdb4e7 , < 210c210c92d78fdf5051bc55c5c69044b1a2150a (git) Affected: 127e670abfa7fa150f6550d620ded930f5bdb4e7 , < ad101d15716f5a24d1fa82a849f80430c805a3dd (git) Affected: 127e670abfa7fa150f6550d620ded930f5bdb4e7 , < d18c81f5d0ecd5796aa47d66d98f2dd54d8d0f70 (git) Affected: 127e670abfa7fa150f6550d620ded930f5bdb4e7 , < d2f236196d542ccd8505736e41c3a1d3f0305f6f (git) Affected: 127e670abfa7fa150f6550d620ded930f5bdb4e7 , < 550511a2470f6d204fa07b331f048bd2d3c51280 (git) Affected: 127e670abfa7fa150f6550d620ded930f5bdb4e7 , < 8aad54746c251f2c2370118df766c0c82e2d2091 (git) Affected: 127e670abfa7fa150f6550d620ded930f5bdb4e7 , < 2e12381d4495dc8b0ff042c6856022b2e359835c (git) Affected: 127e670abfa7fa150f6550d620ded930f5bdb4e7 , < 846c499a65816d13f1186e3090e825e8bb8bcb8b (git)
Linux	Linux	Affected: 3.8 Unaffected: 0 , < 3.8 (semver) Unaffected: 5.10.261 , ≤ 5.10.* (semver) Unaffected: 5.15.212 , ≤ 5.15.* (semver) Unaffected: 6.1.178 , ≤ 6.1.* (semver) Unaffected: 6.6.145 , ≤ 6.6.* (semver) Unaffected: 6.12.96 , ≤ 6.12.* (semver) Unaffected: 6.18.38 , ≤ 6.18.* (semver) Unaffected: 7.1.3 , ≤ 7.1.* (semver) Unaffected: 7.2 , ≤ * (original_commit_for_fix)

Show details on NVD website

JSON

To clipboard

{
  "containers": {
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "fs/f2fs/checkpoint.c",
            "include/linux/f2fs_fs.h"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "lessThan": "210c210c92d78fdf5051bc55c5c69044b1a2150a",
              "status": "affected",
              "version": "127e670abfa7fa150f6550d620ded930f5bdb4e7",
              "versionType": "git"
            },
            {
              "lessThan": "ad101d15716f5a24d1fa82a849f80430c805a3dd",
              "status": "affected",
              "version": "127e670abfa7fa150f6550d620ded930f5bdb4e7",
              "versionType": "git"
            },
            {
              "lessThan": "d18c81f5d0ecd5796aa47d66d98f2dd54d8d0f70",
              "status": "affected",
              "version": "127e670abfa7fa150f6550d620ded930f5bdb4e7",
              "versionType": "git"
            },
            {
              "lessThan": "d2f236196d542ccd8505736e41c3a1d3f0305f6f",
              "status": "affected",
              "version": "127e670abfa7fa150f6550d620ded930f5bdb4e7",
              "versionType": "git"
            },
            {
              "lessThan": "550511a2470f6d204fa07b331f048bd2d3c51280",
              "status": "affected",
              "version": "127e670abfa7fa150f6550d620ded930f5bdb4e7",
              "versionType": "git"
            },
            {
              "lessThan": "8aad54746c251f2c2370118df766c0c82e2d2091",
              "status": "affected",
              "version": "127e670abfa7fa150f6550d620ded930f5bdb4e7",
              "versionType": "git"
            },
            {
              "lessThan": "2e12381d4495dc8b0ff042c6856022b2e359835c",
              "status": "affected",
              "version": "127e670abfa7fa150f6550d620ded930f5bdb4e7",
              "versionType": "git"
            },
            {
              "lessThan": "846c499a65816d13f1186e3090e825e8bb8bcb8b",
              "status": "affected",
              "version": "127e670abfa7fa150f6550d620ded930f5bdb4e7",
              "versionType": "git"
            }
          ]
        },
        {
          "defaultStatus": "affected",
          "product": "Linux",
          "programFiles": [
            "fs/f2fs/checkpoint.c",
            "include/linux/f2fs_fs.h"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "3.8"
            },
            {
              "lessThan": "3.8",
              "status": "unaffected",
              "version": "0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "5.10.*",
              "status": "unaffected",
              "version": "5.10.261",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "5.15.*",
              "status": "unaffected",
              "version": "5.15.212",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.1.*",
              "status": "unaffected",
              "version": "6.1.178",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.6.*",
              "status": "unaffected",
              "version": "6.6.145",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.12.*",
              "status": "unaffected",
              "version": "6.12.96",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.18.*",
              "status": "unaffected",
              "version": "6.18.38",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "7.1.*",
              "status": "unaffected",
              "version": "7.1.3",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "*",
              "status": "unaffected",
              "version": "7.2",
              "versionType": "original_commit_for_fix"
            }
          ]
        }
      ],
      "cpeApplicability": [
        {
          "nodes": [
            {
              "cpeMatch": [
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "5.10.261",
                  "versionStartIncluding": "3.8",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "5.15.212",
                  "versionStartIncluding": "3.8",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.1.178",
                  "versionStartIncluding": "3.8",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.6.145",
                  "versionStartIncluding": "3.8",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.12.96",
                  "versionStartIncluding": "3.8",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.18.38",
                  "versionStartIncluding": "3.8",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "7.1.3",
                  "versionStartIncluding": "3.8",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "7.2",
                  "versionStartIncluding": "3.8",
                  "vulnerable": true
                }
              ],
              "negate": false,
              "operator": "OR"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nf2fs: validate orphan inode entry count\n\nf2fs_recover_orphan_inodes() trusts the orphan block entry_count when\nreplaying orphan inodes from the checkpoint pack. A corrupted entry_count\nlarger than F2FS_ORPHANS_PER_BLOCK makes the recovery loop read past the\nino[] array and interpret footer or following data as inode numbers.\n\nOn a crafted image, mounting an unpatched kernel can drive orphan recovery\ninto f2fs_bug_on() and panic the kernel. Validate entry_count before\nconsuming entries so corrupted checkpoint data fails the mount with\n-EFSCORRUPTED and requests fsck instead.\n\nSet ERROR_INCONSISTENT_ORPHAN as well, so the corruption reason can be\nrecorded in the superblock s_errors[] field. This gives fsck a persistent\nhint even though mount-time orphan recovery failure may leave no chance to\npersist SBI_NEED_FSCK through a checkpoint."
        }
      ],
      "metrics": [
        {
          "cvssV3_1": {
            "baseScore": 8.4,
            "baseSeverity": "HIGH",
            "vectorString": "CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H",
            "version": "3.1"
          },
          "scenarios": [
            {
              "lang": "en",
              "value": "AV:L - The vulnerable code runs only during F2FS mount via the mount syscall path (fs_context \u2192 get_tree_bdev \u2192 f2fs_fill_super \u2192 f2fs_recover_orphan_inodes); it is not reachable from network protocols or device drivers.\nAC:L - An attacker fully controls the crafted on-disk orphan block including entry_count and ino[] contents, so triggering the bug is reliable once a victim or privileged auto-mount path mounts the image; no race or rare layout dependency is required.\nPR:N - The attacker needs no privileges on the victim system\u2014only a malicious F2FS image delivered via removable media, downloaded disk image, or similar that a privileged mount/auto-mount daemon later processes.\nUI:N - No victim interaction is required when the attacker mounts their own crafted image (e.g., loop mount in a user namespace with CAP_SYS_ADMIN), and automated privileged mount paths can process attacker-supplied media without further user action.\nS:U - Impact is confined to kernel/filesystem integrity and availability on the host mounting the image; it does not cross a VM, container, or IOMMU security boundary.\nC:H - The unchecked loop indexes past ino[F2FS_ORPHANS_PER_BLOCK-1] into the block footer and beyond the 4 KiB orphan block, constituting an out-of-bounds read of attacker-influenced metadata that can leak kernel-adjacent memory contents.\nI:H - Misinterpreted inode numbers are passed to recover_orphan_inode(), which clear_nlink() and iput() (truncating data) on matching real inodes, enabling deliberate destruction of filesystem contents from a crafted image.\nA:H - Crafted entry_count values drive f2fs_bug_on() on -ENOENT (kernel BUG/panic with CONFIG_F2FS_CHECK_FS, or WARN/oops otherwise) and can hang or crash the system during mount via unbounded orphan recovery iteration."
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-08-17T04:51:25.680Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
      "references": [
        {
          "url": "https://git.kernel.org/stable/c/210c210c92d78fdf5051bc55c5c69044b1a2150a"
        },
        {
          "url": "https://git.kernel.org/stable/c/ad101d15716f5a24d1fa82a849f80430c805a3dd"
        },
        {
          "url": "https://git.kernel.org/stable/c/d18c81f5d0ecd5796aa47d66d98f2dd54d8d0f70"
        },
        {
          "url": "https://git.kernel.org/stable/c/d2f236196d542ccd8505736e41c3a1d3f0305f6f"
        },
        {
          "url": "https://git.kernel.org/stable/c/550511a2470f6d204fa07b331f048bd2d3c51280"
        },
        {
          "url": "https://git.kernel.org/stable/c/8aad54746c251f2c2370118df766c0c82e2d2091"
        },
        {
          "url": "https://git.kernel.org/stable/c/2e12381d4495dc8b0ff042c6856022b2e359835c"
        },
        {
          "url": "https://git.kernel.org/stable/c/846c499a65816d13f1186e3090e825e8bb8bcb8b"
        }
      ],
      "title": "f2fs: validate orphan inode entry count",
      "x_generator": {
        "engine": "bippy-1.2.0"
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "cveId": "CVE-2026-63818",
    "datePublished": "2026-07-19T12:02:17.022Z",
    "dateReserved": "2026-07-19T07:54:57.014Z",
    "dateUpdated": "2026-08-17T04:51:25.680Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}

Sightings

Author	Source	Type	Date	Other

Nomenclature

Seen: The vulnerability was mentioned, discussed, or observed by the user.
Confirmed: The vulnerability has been validated from an analyst's perspective.
Published Proof of Concept: A public proof of concept is available for this vulnerability.
Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
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.

Detection rules are retrieved from Rulezet.

The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base model, served locally by ML-Gateway. They have not been verified by an analyst and are provided for guidance only.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.

Action not permitted

FKIE_CVE-2026-63818

CVE-2026-63818 (GCVE-0-2026-63818)

Tags

Sightings

Nomenclature