Vulnerability-Lookup

OESA-2026-3981 (CVE-2026-53612)

Vulnerability from osv_openeuler – Published: 2026-09-20 13:23 – Updated: 2026-09-20 13:23 – Source website

Summary

util-linux security update

Details

The util-linux package contains a random collection of files that implements some low-level basic linux utilities.

Security Fix(es):

CVE-2026-53612 has no publicly disclosed vulnerability details yet. It is only indexed by the Snyk data source. Details are pending disclosure.(CVE-2026-53612)

When an /etc/fstab entry is configured with the user or users option, mount(8) validates the target path before performing the mount syscall, creating a Time-of-Check-Time-of-Use (TOCTOU) window. A local unprivileged user with write access to an ancestor directory of the mount target can swap that directory to redirect the mount to an arbitrary root-owned location, potentially escalating privileges to root.(CVE-2026-53613)

A flaw was found in util-linux. The mount(8) SUID binary does not sanitize the LIBMOUNT_FORCE_MOUNT2 environment variable before use. A local unprivileged user can set this variable to force mount(8) to use the legacy two-step mount(2) code path, which applies security restrictions such as nosuid and noexec after the mount is already active. During this window, an attacker can execute a SUID binary from the mounted filesystem, allowing local privilege escalation to root. Affected versions: util-linux v2.39.1 through v2.43-devel (current master).(CVE-2026-53614)

util-linux versions through 2.41.5 and 2.42.2 fail to check mount helper exit status before running post-mount hooks, allowing unprivileged users to execute privileged operations on pre-existing filesystems. Attackers can exploit X-mount.idmap or X-mount.owner hooks to clone filesystems with inherited suid bits or modify target inode permissions after a helper fails, achieving privilege escalation.(CVE-2026-76642)

A flaw was found in util-linux. Restricted bind mounts take the source path from fstab but do not pin that source before the privileged mount. A local unprivileged user who can replace the authorized source or a writable ancestor can redirect SUID mount(8) to bind another host directory. If the fstab entry also sets X-mount.owner, X-mount.group, or X-mount.mode, root then changes ownership or mode on that redirected inode.(CVE-2026-78410)

Severity

7.8 (High)


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

References

URL

Type

	https://www.openeuler.org/zh/security/security-bu…	ADVISORY
	https://nvd.nist.gov/vuln/detail/CVE-2026-53612	ADVISORY
	https://nvd.nist.gov/vuln/detail/CVE-2026-53613	ADVISORY
	https://nvd.nist.gov/vuln/detail/CVE-2026-53614	ADVISORY
	https://nvd.nist.gov/vuln/detail/CVE-2026-76642	ADVISORY
	https://nvd.nist.gov/vuln/detail/CVE-2026-78410	ADVISORY

JSON

To clipboard

{
  "affected": [
    {
      "ecosystem_specific": {
        "aarch64": [
          "libblkid-2.39.1-44.oe2403sp3.aarch64.rpm",
          "libfdisk-2.39.1-44.oe2403sp3.aarch64.rpm",
          "libmount-2.39.1-44.oe2403sp3.aarch64.rpm",
          "libsmartcols-2.39.1-44.oe2403sp3.aarch64.rpm",
          "libuuid-2.39.1-44.oe2403sp3.aarch64.rpm",
          "python3-libmount-2.39.1-44.oe2403sp3.aarch64.rpm",
          "util-linux-2.39.1-44.oe2403sp3.aarch64.rpm",
          "util-linux-debuginfo-2.39.1-44.oe2403sp3.aarch64.rpm",
          "util-linux-debugsource-2.39.1-44.oe2403sp3.aarch64.rpm",
          "util-linux-devel-2.39.1-44.oe2403sp3.aarch64.rpm",
          "util-linux-user-2.39.1-44.oe2403sp3.aarch64.rpm",
          "uuidd-2.39.1-44.oe2403sp3.aarch64.rpm"
        ],
        "noarch": [
          "util-linux-help-2.39.1-44.oe2403sp3.noarch.rpm"
        ],
        "src": [
          "util-linux-2.39.1-44.oe2403sp3.src.rpm"
        ],
        "x86_64": [
          "libblkid-2.39.1-44.oe2403sp3.x86_64.rpm",
          "libfdisk-2.39.1-44.oe2403sp3.x86_64.rpm",
          "libmount-2.39.1-44.oe2403sp3.x86_64.rpm",
          "libsmartcols-2.39.1-44.oe2403sp3.x86_64.rpm",
          "libuuid-2.39.1-44.oe2403sp3.x86_64.rpm",
          "python3-libmount-2.39.1-44.oe2403sp3.x86_64.rpm",
          "util-linux-2.39.1-44.oe2403sp3.x86_64.rpm",
          "util-linux-debuginfo-2.39.1-44.oe2403sp3.x86_64.rpm",
          "util-linux-debugsource-2.39.1-44.oe2403sp3.x86_64.rpm",
          "util-linux-devel-2.39.1-44.oe2403sp3.x86_64.rpm",
          "util-linux-user-2.39.1-44.oe2403sp3.x86_64.rpm",
          "uuidd-2.39.1-44.oe2403sp3.x86_64.rpm"
        ]
      },
      "package": {
        "ecosystem": "openEuler:24.03-LTS-SP3",
        "name": "util-linux",
        "purl": "pkg:rpm/openEuler/util-linux\u0026distro=openEuler-24.03-LTS-SP3"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "2.39.1-44.oe2403sp3"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "database_specific": {
    "severity": "High"
  },
  "details": "The util-linux package contains a random collection of files that implements some low-level basic linux utilities.\r\n\r\nSecurity Fix(es):\n\nCVE-2026-53612 has no publicly disclosed vulnerability details yet. It is only indexed by the Snyk data source. Details are pending disclosure.(CVE-2026-53612)\n\nWhen an /etc/fstab entry is configured with the user or users option, mount(8) validates the target path before performing the mount syscall, creating a Time-of-Check-Time-of-Use (TOCTOU) window. A local unprivileged user with write access to an ancestor directory of the mount target can swap that directory to redirect the mount to an arbitrary root-owned location, potentially escalating privileges to root.(CVE-2026-53613)\n\nA flaw was found in util-linux. The mount(8) SUID binary does not sanitize the LIBMOUNT_FORCE_MOUNT2 environment variable before use. A local unprivileged user can set this variable to force mount(8) to use the legacy two-step mount(2) code path, which applies security restrictions such as nosuid and noexec after the mount is already active. During this window, an attacker can execute a SUID binary from the mounted filesystem, allowing local privilege escalation to root. Affected versions: util-linux v2.39.1 through v2.43-devel (current master).(CVE-2026-53614)\n\nutil-linux versions through 2.41.5 and 2.42.2 fail to check mount helper exit status before running post-mount hooks, allowing unprivileged users to execute privileged operations on pre-existing filesystems. Attackers can exploit X-mount.idmap or X-mount.owner hooks to clone filesystems with inherited suid bits or modify target inode permissions after a helper fails, achieving privilege escalation.(CVE-2026-76642)\n\nA flaw was found in util-linux. Restricted bind mounts take the source path from fstab but do not pin that source before the privileged mount. A local unprivileged user who can replace the authorized source or a writable ancestor can redirect SUID mount(8) to bind another host directory. If the fstab entry also sets X-mount.owner, X-mount.group, or X-mount.mode, root then changes ownership or mode on that redirected inode.(CVE-2026-78410)",
  "id": "OESA-2026-3981",
  "modified": "2026-09-20T13:23:47Z",
  "published": "2026-09-20T13:23:47Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://www.openeuler.org/zh/security/security-bulletins/detail/?id=openEuler-SA-2026-3981"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-53612"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-53613"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-53614"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-76642"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-78410"
    }
  ],
  "schema_version": "1.7.2",
  "severity": [
    {
      "score": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
      "type": "CVSS_V3"
    }
  ],
  "summary": "util-linux security update",
  "upstream": [
    "CVE-2026-53612",
    "CVE-2026-53613",
    "CVE-2026-53614",
    "CVE-2026-76642",
    "CVE-2026-78410"
  ]
}

CVE-2026-76642 (GCVE-0-2026-76642)

Vulnerability from cvelistv5 – Published: 2026-09-03 10:54 – Updated: 2026-09-03 14:00

Title

util-linux libmount Privilege Escalation via Failed Mount Helper

Summary

Severity

8.5 (High)


                        
                          CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N

7.8 (High)


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

SSVC

Exploitation: poc Automatable: no Technical Impact: total

CISA Coordinator · CISA-ADP (v2.0.3)

Decision recorded 2026-09-03 14:00 UTC

CWE

CWE-390 - Detection of Error Condition Without Action

Assigner

VulnCheck mitre root

References

8 references

URL	Tags
https://github.com/util-linux/util-linux/security…	vendor-advisory
https://github.com/util-linux/util-linux/commit/f…	patch
https://github.com/util-linux/util-linux/commit/1…	patch
https://github.com/util-linux/util-linux/commit/a…	patch
https://github.com/util-linux/util-linux/blob/v2.…	technical-description
https://github.com/util-linux/util-linux/blob/v2.…	technical-description
https://github.com/util-linux/util-linux	product
https://www.vulncheck.com/advisories/util-linux-l…	third-party-advisory

Impacted products

1 product

Vendor	Product	Version
util-linux	util-linux	Affected: 2.39 , < 2.41.6 (custom) Affected: 2.42 , < 2.42.3 (custom) cpe:2.3:a:kernel:util-linux:::::::: cpe:2.3:a:kernel:util-linux::::::::

Date Public

2026-09-02 00:00

Credits

Andreas Gabriel Berbescu Ivan Redondo Plaza

Show details on NVD website

JSON

To clipboard

{
  "containers": {
    "adp": [
      {
        "metrics": [
          {
            "other": {
              "content": {
                "id": "CVE-2026-76642",
                "options": [
                  {
                    "Exploitation": "poc"
                  },
                  {
                    "Automatable": "no"
                  },
                  {
                    "Technical Impact": "total"
                  }
                ],
                "role": "CISA Coordinator",
                "timestamp": "2026-09-03T14:00:22.814411Z",
                "version": "2.0.3"
              },
              "type": "ssvc"
            }
          }
        ],
        "providerMetadata": {
          "dateUpdated": "2026-09-03T14:00:29.374Z",
          "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
          "shortName": "CISA-ADP"
        },
        "references": [
          {
            "tags": [
              "exploit"
            ],
            "url": "https://github.com/util-linux/util-linux/security/advisories/GHSA-m25x-3hj9-m26f"
          }
        ],
        "title": "CISA ADP Vulnrichment"
      }
    ],
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "packageURL": "pkg:github/util-linux/util-linux",
          "product": "util-linux",
          "vendor": "util-linux",
          "versions": [
            {
              "lessThan": "2.41.6",
              "status": "affected",
              "version": "2.39",
              "versionType": "custom"
            },
            {
              "lessThan": "2.42.3",
              "status": "affected",
              "version": "2.42",
              "versionType": "custom"
            }
          ]
        }
      ],
      "cpeApplicability": [
        {
          "nodes": [
            {
              "cpeMatch": [
                {
                  "criteria": "cpe:2.3:a:kernel:util-linux:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "2.41.6",
                  "versionStartIncluding": "2.39",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:a:kernel:util-linux:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "2.42.3",
                  "versionStartIncluding": "2.42",
                  "vulnerable": true
                }
              ],
              "negate": false,
              "operator": "OR"
            }
          ]
        }
      ],
      "credits": [
        {
          "lang": "en",
          "type": "reporter",
          "value": "Andreas Gabriel Berbescu"
        },
        {
          "lang": "en",
          "type": "reporter",
          "value": "Ivan Redondo Plaza"
        }
      ],
      "datePublic": "2026-09-02T00:00:00.000Z",
      "descriptions": [
        {
          "lang": "en",
          "value": "util-linux versions through 2.41.5 and 2.42.2 fail to check mount helper exit status before running post-mount hooks, allowing unprivileged users to execute privileged operations on pre-existing filesystems. Attackers can exploit X-mount.idmap or X-mount.owner hooks to clone filesystems with inherited suid bits or modify target inode permissions after a helper fails, achieving privilege escalation."
        }
      ],
      "metrics": [
        {
          "cvssV4_0": {
            "attackComplexity": "LOW",
            "attackRequirements": "NONE",
            "attackVector": "LOCAL",
            "baseScore": 8.5,
            "baseSeverity": "HIGH",
            "privilegesRequired": "LOW",
            "subAvailabilityImpact": "NONE",
            "subConfidentialityImpact": "NONE",
            "subIntegrityImpact": "NONE",
            "userInteraction": "NONE",
            "vectorString": "CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N",
            "version": "4.0",
            "vulnAvailabilityImpact": "HIGH",
            "vulnConfidentialityImpact": "HIGH",
            "vulnIntegrityImpact": "HIGH"
          },
          "format": "CVSS"
        },
        {
          "cvssV3_1": {
            "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"
          },
          "format": "CVSS"
        }
      ],
      "problemTypes": [
        {
          "descriptions": [
            {
              "cweId": "CWE-390",
              "description": "Detection of Error Condition Without Action",
              "lang": "en",
              "type": "CWE"
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-09-03T10:54:08.150Z",
        "orgId": "83251b91-4cc7-4094-a5c7-464a1b83ea10",
        "shortName": "VulnCheck"
      },
      "references": [
        {
          "name": "GitHub Security Advisory (GHSA-m25x-3hj9-m26f)",
          "tags": [
            "vendor-advisory"
          ],
          "url": "https://github.com/util-linux/util-linux/security/advisories/GHSA-m25x-3hj9-m26f"
        },
        {
          "name": "Patch Commit",
          "tags": [
            "patch"
          ],
          "url": "https://github.com/util-linux/util-linux/commit/f57cea130839c0af8dc0525274267ae4cfd66bbf"
        },
        {
          "name": "Patch Commit",
          "tags": [
            "patch"
          ],
          "url": "https://github.com/util-linux/util-linux/commit/1d14676ea70003e9f5b2a6a76af0cadb1190411a"
        },
        {
          "name": "Patch Commit",
          "tags": [
            "patch"
          ],
          "url": "https://github.com/util-linux/util-linux/commit/a15c00a9e545aa8b9cf6ec0f888ff6c7b3eaeedc"
        },
        {
          "tags": [
            "technical-description"
          ],
          "url": "https://github.com/util-linux/util-linux/blob/v2.42.2/libmount/src/context_mount.c#L476"
        },
        {
          "tags": [
            "technical-description"
          ],
          "url": "https://github.com/util-linux/util-linux/blob/v2.42.2/libmount/src/context_mount.c#L892"
        },
        {
          "tags": [
            "product"
          ],
          "url": "https://github.com/util-linux/util-linux"
        },
        {
          "name": "VulnCheck Advisory: util-linux libmount Privilege Escalation via Failed Mount Helper",
          "tags": [
            "third-party-advisory"
          ],
          "url": "https://www.vulncheck.com/advisories/util-linux-libmount-privilege-escalation-via-failed-mount-helper"
        }
      ],
      "title": "util-linux libmount Privilege Escalation via Failed Mount Helper",
      "x_generator": {
        "engine": "vulncheck-endgame"
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "83251b91-4cc7-4094-a5c7-464a1b83ea10",
    "assignerShortName": "VulnCheck",
    "cveId": "CVE-2026-76642",
    "datePublished": "2026-09-03T10:54:08.150Z",
    "dateReserved": "2026-08-19T14:53:58.575Z",
    "dateUpdated": "2026-09-03T14:00:29.374Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}

CVE-2026-78410 (GCVE-0-2026-78410)

Vulnerability from cvelistv5 – Published: 2026-09-02 15:05 – Updated: 2026-09-04 18:43

Title

Util-linux: util-linux: restricted bind mounts do not pin the source, allowing x-mount.owner/group/mode redirection

Summary

Severity

7.8 (High)


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

SSVC

Exploitation: poc Automatable: no Technical Impact: total

CISA Coordinator · CISA-ADP (v2.0.3)

Decision recorded 2026-09-04 18:43 UTC

CWE

CWE-367 - Time-of-check Time-of-use (TOCTOU) Race Condition

Assigner

redhat redhat root

References

4 references

URL	Tags
https://access.redhat.com/errata/RHSA-2026:63162	vendor-advisoryx_refsource_REDHAT
https://access.redhat.com/security/cve/CVE-2026-78410	vdb-entryx_refsource_REDHAT
https://bugzilla.redhat.com/show_bug.cgi?id=2522684	issue-trackingx_refsource_REDHAT
https://github.com/util-linux/util-linux/security…

Impacted products

6 products

Vendor	Product	Version
Red Hat	Red Hat Hardened Images	Unaffected: 2.42.2-3.4.hum1 , < * (rpm) cpe:/a:redhat:hummingbird:1
Red Hat	Red Hat Enterprise Linux 10	cpe:/o:redhat:enterprise_linux:10
Red Hat	Red Hat Enterprise Linux 7	cpe:/o:redhat:enterprise_linux:7
Red Hat	Red Hat Enterprise Linux 8	cpe:/o:redhat:enterprise_linux:8
Red Hat	Red Hat Enterprise Linux 9	cpe:/o:redhat:enterprise_linux:9
Red Hat	Red Hat OpenShift Container Platform 4	cpe:/a:redhat:openshift:4

Date Public

2026-09-02 00:00

Credits

Upstream acknowledges Zhuorao Yang (Huawei Cloud) as the original reporter.

Show details on NVD website

JSON

To clipboard

{
  "containers": {
    "adp": [
      {
        "metrics": [
          {
            "other": {
              "content": {
                "id": "CVE-2026-78410",
                "options": [
                  {
                    "Exploitation": "poc"
                  },
                  {
                    "Automatable": "no"
                  },
                  {
                    "Technical Impact": "total"
                  }
                ],
                "role": "CISA Coordinator",
                "timestamp": "2026-09-04T18:43:04.874138Z",
                "version": "2.0.3"
              },
              "type": "ssvc"
            }
          }
        ],
        "providerMetadata": {
          "dateUpdated": "2026-09-04T18:43:10.663Z",
          "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
          "shortName": "CISA-ADP"
        },
        "references": [
          {
            "tags": [
              "exploit"
            ],
            "url": "https://github.com/util-linux/util-linux/security/advisories/GHSA-rh77-686x-2f2m"
          }
        ],
        "title": "CISA ADP Vulnrichment"
      }
    ],
    "cna": {
      "affected": [
        {
          "collectionURL": "https://catalog.redhat.com/software/containers/",
          "cpes": [
            "cpe:/a:redhat:hummingbird:1"
          ],
          "defaultStatus": "affected",
          "packageName": "util-linux-main",
          "product": "Red Hat Hardened Images",
          "vendor": "Red Hat",
          "versions": [
            {
              "lessThan": "*",
              "status": "unaffected",
              "version": "2.42.2-3.4.hum1",
              "versionType": "rpm"
            }
          ]
        },
        {
          "collectionURL": "https://access.redhat.com/downloads/content/package-browser/",
          "cpes": [
            "cpe:/o:redhat:enterprise_linux:10"
          ],
          "defaultStatus": "affected",
          "packageName": "util-linux",
          "product": "Red Hat Enterprise Linux 10",
          "vendor": "Red Hat"
        },
        {
          "collectionURL": "https://access.redhat.com/downloads/content/package-browser/",
          "cpes": [
            "cpe:/o:redhat:enterprise_linux:7"
          ],
          "defaultStatus": "unaffected",
          "packageName": "util-linux",
          "product": "Red Hat Enterprise Linux 7",
          "vendor": "Red Hat"
        },
        {
          "collectionURL": "https://access.redhat.com/downloads/content/package-browser/",
          "cpes": [
            "cpe:/o:redhat:enterprise_linux:8"
          ],
          "defaultStatus": "unaffected",
          "packageName": "util-linux",
          "product": "Red Hat Enterprise Linux 8",
          "vendor": "Red Hat"
        },
        {
          "collectionURL": "https://access.redhat.com/downloads/content/package-browser/",
          "cpes": [
            "cpe:/o:redhat:enterprise_linux:9"
          ],
          "defaultStatus": "unaffected",
          "packageName": "rhel8/flatpak-runtime",
          "product": "Red Hat Enterprise Linux 9",
          "vendor": "Red Hat"
        },
        {
          "collectionURL": "https://access.redhat.com/downloads/content/package-browser/",
          "cpes": [
            "cpe:/o:redhat:enterprise_linux:9"
          ],
          "defaultStatus": "unaffected",
          "packageName": "rhel8/flatpak-sdk",
          "product": "Red Hat Enterprise Linux 9",
          "vendor": "Red Hat"
        },
        {
          "collectionURL": "https://access.redhat.com/downloads/content/package-browser/",
          "cpes": [
            "cpe:/o:redhat:enterprise_linux:9"
          ],
          "defaultStatus": "unaffected",
          "packageName": "util-linux",
          "product": "Red Hat Enterprise Linux 9",
          "vendor": "Red Hat"
        },
        {
          "collectionURL": "https://access.redhat.com/downloads/content/package-browser/",
          "cpes": [
            "cpe:/a:redhat:openshift:4"
          ],
          "defaultStatus": "unaffected",
          "packageName": "rhcos",
          "product": "Red Hat OpenShift Container Platform 4",
          "vendor": "Red Hat"
        }
      ],
      "credits": [
        {
          "lang": "en",
          "value": "Upstream acknowledges Zhuorao Yang (Huawei Cloud) as the original reporter."
        }
      ],
      "datePublic": "2026-09-02T00:00:00.000Z",
      "descriptions": [
        {
          "lang": "en",
          "value": "A flaw was found in util-linux. Restricted bind mounts take the source path from fstab but do not pin that source before the privileged mount. A local unprivileged user who can replace the authorized source or a writable ancestor can redirect SUID mount(8) to bind another host directory. If the fstab entry also sets X-mount.owner, X-mount.group, or X-mount.mode, root then changes ownership or mode on that redirected inode."
        }
      ],
      "metrics": [
        {
          "other": {
            "content": {
              "namespace": "https://access.redhat.com/security/updates/classification/",
              "value": "Important"
            },
            "type": "Red Hat severity rating"
          }
        },
        {
          "cvssV3_1": {
            "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"
          },
          "format": "CVSS"
        }
      ],
      "problemTypes": [
        {
          "descriptions": [
            {
              "cweId": "CWE-367",
              "description": "Time-of-check Time-of-use (TOCTOU) Race Condition",
              "lang": "en",
              "type": "CWE"
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-09-03T12:51:01.307Z",
        "orgId": "53f830b8-0a3f-465b-8143-3b8a9948e749",
        "shortName": "redhat"
      },
      "references": [
        {
          "name": "RHSA-2026:63162",
          "tags": [
            "vendor-advisory",
            "x_refsource_REDHAT"
          ],
          "url": "https://access.redhat.com/errata/RHSA-2026:63162"
        },
        {
          "tags": [
            "vdb-entry",
            "x_refsource_REDHAT"
          ],
          "url": "https://access.redhat.com/security/cve/CVE-2026-78410"
        },
        {
          "name": "RHBZ#2522684",
          "tags": [
            "issue-tracking",
            "x_refsource_REDHAT"
          ],
          "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2522684"
        },
        {
          "url": "https://github.com/util-linux/util-linux/security/advisories/GHSA-rh77-686x-2f2m"
        }
      ],
      "timeline": [
        {
          "lang": "en",
          "time": "2026-06-18T00:00:00.000Z",
          "value": "Reported to Red Hat."
        },
        {
          "lang": "en",
          "time": "2026-09-02T00:00:00.000Z",
          "value": "Made public."
        }
      ],
      "title": "Util-linux: util-linux: restricted bind mounts do not pin the source, allowing x-mount.owner/group/mode redirection",
      "workarounds": [
        {
          "lang": "en",
          "value": "Upgrade to util-linux v2.41.6, v2.42.3, or later. Until a fix is applied, do not allow unprivileged /etc/fstab bind or rbind entries that also specify X-mount.owner, X-mount.group, or X-mount.mode, especially when the bind source is below a user-writable ancestor."
        }
      ],
      "x_generator": {
        "engine": "cvelib 1.8.0"
      },
      "x_redhatCweChain": "CWE-367: Time-of-check Time-of-use (TOCTOU) Race Condition"
    }
  },
  "cveMetadata": {
    "assignerOrgId": "53f830b8-0a3f-465b-8143-3b8a9948e749",
    "assignerShortName": "redhat",
    "cveId": "CVE-2026-78410",
    "datePublished": "2026-09-02T15:05:34.414Z",
    "dateReserved": "2026-08-24T14:40:20.201Z",
    "dateUpdated": "2026-09-04T18:43:10.663Z",
    "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.

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.
Browse all ATT&CK techniques and the vulnerabilities related to each.

Related by attack behaviour

Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.

Action not permitted

OESA-2026-3981 (CVE-2026-53612)

CVE-2026-76642 (GCVE-0-2026-76642)

CVE-2026-78410 (GCVE-0-2026-78410)

Tags

Sightings

Nomenclature

Related by attack behaviour