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    2 vulnerabilities by wlroots

    CVE-2026-121604 (GCVE-0-2026-121604)

    Vulnerability from nvd – Published: 2026-11-03 16:26 – Updated: 2026-11-03 16:26
    VLAI
    Title
    wlroots before 0.20.2 Out-of-Bounds Read via read_surface_class() in xwm.c
    Summary
    wlroots before 0.20.2 contains an out-of-bounds read vulnerability in read_surface_class() in xwayland/xwm.c that allows local X11 clients to leak compositor heap memory. Attackers can set a WM_CLASS property with a NUL-terminated instance but unterminated class, exposing over-read heap bytes as the window class or app_id over IPC.
    Severity
    4.8 (Medium)
    CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N
    3.3 (Low)
    CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N
    CWE
    Assigner
    VulnCheck CNA under the mitre root
    CNA scorecard B 84/100 over 7402 records in the last 180 days details
    References
    Impacted products
    Vendor Product Version
    wlroots wlroots Affected: 0 , < 0.20.2 (semver)
    		Create a notification for this product.
    Date Public
    2026-05-21 00:00
    Credits
    Tristan Madani (Talence Security) Simon Ser
    Show details on NVD website
    To clipboard 

    {
  "containers": {
    "cna": {
      "affected": [
        {
          "collectionURL": "https://gitlab.freedesktop.org/wlroots/wlroots",
          "defaultStatus": "unaffected",
          "product": "wlroots",
          "repo": "https://gitlab.freedesktop.org/wlroots/wlroots",
          "vendor": "wlroots",
          "versions": [
            {
              "lessThan": "0.20.2",
              "status": "affected",
              "version": "0",
              "versionType": "semver"
            }
          ]
        }
      ],
      "credits": [
        {
          "lang": "en",
          "type": "finder",
          "value": "Tristan Madani (Talence Security)"
        },
        {
          "lang": "en",
          "type": "remediation developer",
          "value": "Simon Ser"
        }
      ],
      "datePublic": "2026-05-21T00:00:00.000Z",
      "descriptions": [
        {
          "lang": "en",
          "value": "wlroots before 0.20.2 contains an out-of-bounds read vulnerability in read_surface_class() in xwayland/xwm.c that allows local X11 clients to leak compositor heap memory. Attackers can set a WM_CLASS property with a NUL-terminated instance but unterminated class, exposing over-read heap bytes as the window class or app_id over IPC."
        }
      ],
      "metrics": [
        {
          "cvssV4_0": {
            "attackComplexity": "LOW",
            "attackRequirements": "NONE",
            "attackVector": "LOCAL",
            "baseScore": 4.8,
            "baseSeverity": "MEDIUM",
            "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:L/VI:N/VA:N/SC:N/SI:N/SA:N",
            "version": "4.0",
            "vulnAvailabilityImpact": "NONE",
            "vulnConfidentialityImpact": "LOW",
            "vulnIntegrityImpact": "NONE"
          },
          "format": "CVSS"
        },
        {
          "cvssV3_1": {
            "attackComplexity": "LOW",
            "attackVector": "LOCAL",
            "availabilityImpact": "NONE",
            "baseScore": 3.3,
            "baseSeverity": "LOW",
            "confidentialityImpact": "LOW",
            "integrityImpact": "NONE",
            "privilegesRequired": "LOW",
            "scope": "UNCHANGED",
            "userInteraction": "NONE",
            "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N",
            "version": "3.1"
          },
          "format": "CVSS"
        }
      ],
      "problemTypes": [
        {
          "descriptions": [
            {
              "cweId": "CWE-125",
              "description": "Out-of-bounds Read",
              "lang": "en",
              "type": "CWE"
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-11-03T16:26:55.569Z",
        "orgId": "83251b91-4cc7-4094-a5c7-464a1b83ea10",
        "shortName": "VulnCheck"
      },
      "references": [
        {
          "tags": [
            "issue-tracking"
          ],
          "url": "https://gitlab.freedesktop.org/wlroots/wlroots/-/work_items/4092"
        },
        {
          "tags": [
            "issue-tracking"
          ],
          "url": "https://gitlab.freedesktop.org/wlroots/wlroots/-/merge_requests/5374"
        },
        {
          "tags": [
            "patch"
          ],
          "url": "https://gitlab.freedesktop.org/wlroots/wlroots/-/commit/851cdd0089004884bd85a95ad21f04009cb5a53a"
        },
        {
          "tags": [
            "patch"
          ],
          "url": "https://gitlab.freedesktop.org/wlroots/wlroots/-/commit/4412992469540b1d578cb94a5cd4e6e5829812dc"
        },
        {
          "tags": [
            "release-notes"
          ],
          "url": "https://gitlab.freedesktop.org/wlroots/wlroots/-/releases/0.20.2"
        },
        {
          "tags": [
            "technical-description"
          ],
          "url": "https://gitlab.freedesktop.org/wlroots/wlroots/-/blob/0.20.1/xwayland/xwm.c#L661-L678"
        },
        {
          "name": "VulnCheck Advisory: wlroots before 0.20.2 Out-of-Bounds Read via read_surface_class() in xwm.c",
          "tags": [
            "third-party-advisory"
          ],
          "url": "https://www.vulncheck.com/advisories/wlroots-before-0.20.2-out-of-bounds-read-via-read-surface-class-in-xwm-c"
        }
      ],
      "title": "wlroots before 0.20.2 Out-of-Bounds Read via read_surface_class() in xwm.c",
      "x_generator": {
        "engine": "vulncheck-endgame"
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "83251b91-4cc7-4094-a5c7-464a1b83ea10",
    "assignerShortName": "VulnCheck",
    "cveId": "CVE-2026-121604",
    "datePublished": "2026-11-03T16:26:55.569Z",
    "dateReserved": "2026-11-03T16:19:16.465Z",
    "dateUpdated": "2026-11-03T16:26:55.569Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}

    CVE-2026-121604 (GCVE-0-2026-121604)

    Vulnerability from cvelistv5 – Published: 2026-11-03 16:26 – Updated: 2026-11-03 16:26
    VLAI
    Title
    wlroots before 0.20.2 Out-of-Bounds Read via read_surface_class() in xwm.c
    Summary
    wlroots before 0.20.2 contains an out-of-bounds read vulnerability in read_surface_class() in xwayland/xwm.c that allows local X11 clients to leak compositor heap memory. Attackers can set a WM_CLASS property with a NUL-terminated instance but unterminated class, exposing over-read heap bytes as the window class or app_id over IPC.
    Severity
    4.8 (Medium)
    CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N
    3.3 (Low)
    CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N
    CWE
    Assigner
    VulnCheck CNA under the mitre root
    CNA scorecard B 84/100 over 7402 records in the last 180 days details
    References
    Impacted products
    Vendor Product Version
    wlroots wlroots Affected: 0 , < 0.20.2 (semver)
    		Create a notification for this product.
    Date Public
    2026-05-21 00:00
    Credits
    Tristan Madani (Talence Security) Simon Ser
    Show details on NVD website
    To clipboard 

    {
  "containers": {
    "cna": {
      "affected": [
        {
          "collectionURL": "https://gitlab.freedesktop.org/wlroots/wlroots",
          "defaultStatus": "unaffected",
          "product": "wlroots",
          "repo": "https://gitlab.freedesktop.org/wlroots/wlroots",
          "vendor": "wlroots",
          "versions": [
            {
              "lessThan": "0.20.2",
              "status": "affected",
              "version": "0",
              "versionType": "semver"
            }
          ]
        }
      ],
      "credits": [
        {
          "lang": "en",
          "type": "finder",
          "value": "Tristan Madani (Talence Security)"
        },
        {
          "lang": "en",
          "type": "remediation developer",
          "value": "Simon Ser"
        }
      ],
      "datePublic": "2026-05-21T00:00:00.000Z",
      "descriptions": [
        {
          "lang": "en",
          "value": "wlroots before 0.20.2 contains an out-of-bounds read vulnerability in read_surface_class() in xwayland/xwm.c that allows local X11 clients to leak compositor heap memory. Attackers can set a WM_CLASS property with a NUL-terminated instance but unterminated class, exposing over-read heap bytes as the window class or app_id over IPC."
        }
      ],
      "metrics": [
        {
          "cvssV4_0": {
            "attackComplexity": "LOW",
            "attackRequirements": "NONE",
            "attackVector": "LOCAL",
            "baseScore": 4.8,
            "baseSeverity": "MEDIUM",
            "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:L/VI:N/VA:N/SC:N/SI:N/SA:N",
            "version": "4.0",
            "vulnAvailabilityImpact": "NONE",
            "vulnConfidentialityImpact": "LOW",
            "vulnIntegrityImpact": "NONE"
          },
          "format": "CVSS"
        },
        {
          "cvssV3_1": {
            "attackComplexity": "LOW",
            "attackVector": "LOCAL",
            "availabilityImpact": "NONE",
            "baseScore": 3.3,
            "baseSeverity": "LOW",
            "confidentialityImpact": "LOW",
            "integrityImpact": "NONE",
            "privilegesRequired": "LOW",
            "scope": "UNCHANGED",
            "userInteraction": "NONE",
            "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N",
            "version": "3.1"
          },
          "format": "CVSS"
        }
      ],
      "problemTypes": [
        {
          "descriptions": [
            {
              "cweId": "CWE-125",
              "description": "Out-of-bounds Read",
              "lang": "en",
              "type": "CWE"
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-11-03T16:26:55.569Z",
        "orgId": "83251b91-4cc7-4094-a5c7-464a1b83ea10",
        "shortName": "VulnCheck"
      },
      "references": [
        {
          "tags": [
            "issue-tracking"
          ],
          "url": "https://gitlab.freedesktop.org/wlroots/wlroots/-/work_items/4092"
        },
        {
          "tags": [
            "issue-tracking"
          ],
          "url": "https://gitlab.freedesktop.org/wlroots/wlroots/-/merge_requests/5374"
        },
        {
          "tags": [
            "patch"
          ],
          "url": "https://gitlab.freedesktop.org/wlroots/wlroots/-/commit/851cdd0089004884bd85a95ad21f04009cb5a53a"
        },
        {
          "tags": [
            "patch"
          ],
          "url": "https://gitlab.freedesktop.org/wlroots/wlroots/-/commit/4412992469540b1d578cb94a5cd4e6e5829812dc"
        },
        {
          "tags": [
            "release-notes"
          ],
          "url": "https://gitlab.freedesktop.org/wlroots/wlroots/-/releases/0.20.2"
        },
        {
          "tags": [
            "technical-description"
          ],
          "url": "https://gitlab.freedesktop.org/wlroots/wlroots/-/blob/0.20.1/xwayland/xwm.c#L661-L678"
        },
        {
          "name": "VulnCheck Advisory: wlroots before 0.20.2 Out-of-Bounds Read via read_surface_class() in xwm.c",
          "tags": [
            "third-party-advisory"
          ],
          "url": "https://www.vulncheck.com/advisories/wlroots-before-0.20.2-out-of-bounds-read-via-read-surface-class-in-xwm-c"
        }
      ],
      "title": "wlroots before 0.20.2 Out-of-Bounds Read via read_surface_class() in xwm.c",
      "x_generator": {
        "engine": "vulncheck-endgame"
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "83251b91-4cc7-4094-a5c7-464a1b83ea10",
    "assignerShortName": "VulnCheck",
    "cveId": "CVE-2026-121604",
    "datePublished": "2026-11-03T16:26:55.569Z",
    "dateReserved": "2026-11-03T16:19:16.465Z",
    "dateUpdated": "2026-11-03T16:26:55.569Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
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}