Vulnerability-Lookup

OESA-2026-3418 (CVE-2026-6368)

Vulnerability from osv_openeuler – Published: 2026-08-20 09:55 – Updated: 2026-08-20 09:55 – Source website

Summary

glibc security update

Details

The GNU C Library project provides the core libraries for the GNU system and GNU/Linux systems, as well as many other systems that use Linux as the kernel. These libraries provide critical APIs including ISO C11, POSIX.1-2008, BSD, OS-specific APIs and more. These APIs include such foundational facilities as open, read, write, malloc, printf, getaddrinfo, dlopen, pthread_create, crypt, login, exit and more.

Security Fix(es):

Calling wordexp with WRDE_APPEND in the GNU C Library version 2.0 to version 2.43 can cause the interface to return invalid memory in the we_wordv member, which on subsequent calls to wordfree may abort the process.(CVE-2026-6368)

When expanding paths that begin with a tilde (~) followed by a username, the internal parse_tilde function extracts the username to determine the user's home directory. The implementation allocates memory for this username directly on the stack using the strndupa macro. Because the size of this allocation was determined by the length of the user-supplied input without any bounds checks, passing an excessively long username e.g. thousands of characters, forces the thread to exhaust its stack space. Thus if an application passes untrusted, attacker-controlled input to the wordexp function, an attacker can trigger a stack clash.(CVE-2026-6791)

Severity

9.1 (Critical)


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

References

URL

Type

	https://www.openeuler.org/zh/security/security-bu…	ADVISORY
	https://nvd.nist.gov/vuln/detail/CVE-2026-6368	ADVISORY
	https://nvd.nist.gov/vuln/detail/CVE-2026-6791	ADVISORY

JSON

To clipboard

{
  "affected": [
    {
      "ecosystem_specific": {
        "aarch64": [
          "glibc-2.28-129.oe2003sp4.aarch64.rpm",
          "glibc-all-langpacks-2.28-129.oe2003sp4.aarch64.rpm",
          "glibc-benchtests-2.28-129.oe2003sp4.aarch64.rpm",
          "glibc-common-2.28-129.oe2003sp4.aarch64.rpm",
          "glibc-compat-2.17-2.28-129.oe2003sp4.aarch64.rpm",
          "glibc-debuginfo-2.28-129.oe2003sp4.aarch64.rpm",
          "glibc-debugsource-2.28-129.oe2003sp4.aarch64.rpm",
          "glibc-debugutils-2.28-129.oe2003sp4.aarch64.rpm",
          "glibc-devel-2.28-129.oe2003sp4.aarch64.rpm",
          "glibc-locale-source-2.28-129.oe2003sp4.aarch64.rpm",
          "glibc-nss-devel-2.28-129.oe2003sp4.aarch64.rpm",
          "libnsl-2.28-129.oe2003sp4.aarch64.rpm",
          "nscd-2.28-129.oe2003sp4.aarch64.rpm",
          "nss_modules-2.28-129.oe2003sp4.aarch64.rpm"
        ],
        "noarch": [
          "glibc-help-2.28-129.oe2003sp4.noarch.rpm"
        ],
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          "glibc-2.28-129.oe2003sp4.src.rpm"
        ],
        "x86_64": [
          "glibc-2.28-129.oe2003sp4.x86_64.rpm",
          "glibc-all-langpacks-2.28-129.oe2003sp4.x86_64.rpm",
          "glibc-benchtests-2.28-129.oe2003sp4.x86_64.rpm",
          "glibc-common-2.28-129.oe2003sp4.x86_64.rpm",
          "glibc-compat-2.17-2.28-129.oe2003sp4.x86_64.rpm",
          "glibc-debuginfo-2.28-129.oe2003sp4.x86_64.rpm",
          "glibc-debugsource-2.28-129.oe2003sp4.x86_64.rpm",
          "glibc-debugutils-2.28-129.oe2003sp4.x86_64.rpm",
          "glibc-devel-2.28-129.oe2003sp4.x86_64.rpm",
          "glibc-locale-source-2.28-129.oe2003sp4.x86_64.rpm",
          "glibc-nss-devel-2.28-129.oe2003sp4.x86_64.rpm",
          "libnsl-2.28-129.oe2003sp4.x86_64.rpm",
          "nscd-2.28-129.oe2003sp4.x86_64.rpm",
          "nss_modules-2.28-129.oe2003sp4.x86_64.rpm"
        ]
      },
      "package": {
        "ecosystem": "openEuler:20.03-LTS-SP4",
        "name": "glibc",
        "purl": "pkg:rpm/openEuler/glibc\u0026distro=openEuler-20.03-LTS-SP4"
      },
      "ranges": [
        {
          "events": [
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            },
            {
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          "type": "ECOSYSTEM"
        }
      ]
    },
    {
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          "glibc-all-langpacks-2.34-181.oe2203sp4.aarch64.rpm",
          "glibc-common-2.34-181.oe2203sp4.aarch64.rpm",
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          "glibc-debugsource-2.34-181.oe2203sp4.aarch64.rpm",
          "glibc-debugutils-2.34-181.oe2203sp4.aarch64.rpm",
          "glibc-devel-2.34-181.oe2203sp4.aarch64.rpm",
          "glibc-locale-archive-2.34-181.oe2203sp4.aarch64.rpm",
          "glibc-locale-source-2.34-181.oe2203sp4.aarch64.rpm",
          "glibc-nss-devel-2.34-181.oe2203sp4.aarch64.rpm",
          "libnsl-2.34-181.oe2203sp4.aarch64.rpm",
          "nscd-2.34-181.oe2203sp4.aarch64.rpm",
          "nss_modules-2.34-181.oe2203sp4.aarch64.rpm"
        ],
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          "glibc-2.34-181.oe2203sp4.src.rpm"
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          "glibc-2.34-181.oe2203sp4.x86_64.rpm",
          "glibc-all-langpacks-2.34-181.oe2203sp4.x86_64.rpm",
          "glibc-common-2.34-181.oe2203sp4.x86_64.rpm",
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          "glibc-debugutils-2.34-181.oe2203sp4.x86_64.rpm",
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          "libnsl-2.34-181.oe2203sp4.x86_64.rpm",
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          "nss_modules-2.34-181.oe2203sp4.x86_64.rpm"
        ]
      },
      "package": {
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      },
      "ranges": [
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            {
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            },
            {
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          ],
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        }
      ]
    },
    {
      "ecosystem_specific": {
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          "glibc-2.38-119.oe2403sp1.aarch64.rpm",
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          "glibc-common-2.38-119.oe2403sp1.aarch64.rpm",
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          "glibc-debugsource-2.38-119.oe2403sp1.aarch64.rpm",
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          "glibc-devel-2.38-119.oe2403sp1.aarch64.rpm",
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          "glibc-locale-source-2.38-119.oe2403sp1.aarch64.rpm",
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          "libnsl-2.38-119.oe2403sp1.aarch64.rpm",
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          "nss_modules-2.38-119.oe2403sp1.aarch64.rpm"
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          "glibc-2.38-119.oe2403sp1.src.rpm"
        ],
        "x86_64": [
          "glibc-2.38-119.oe2403sp1.x86_64.rpm",
          "glibc-all-langpacks-2.38-119.oe2403sp1.x86_64.rpm",
          "glibc-common-2.38-119.oe2403sp1.x86_64.rpm",
          "glibc-debuginfo-2.38-119.oe2403sp1.x86_64.rpm",
          "glibc-debugsource-2.38-119.oe2403sp1.x86_64.rpm",
          "glibc-debugutils-2.38-119.oe2403sp1.x86_64.rpm",
          "glibc-devel-2.38-119.oe2403sp1.x86_64.rpm",
          "glibc-locale-archive-2.38-119.oe2403sp1.x86_64.rpm",
          "glibc-locale-source-2.38-119.oe2403sp1.x86_64.rpm",
          "glibc-nss-devel-2.38-119.oe2403sp1.x86_64.rpm",
          "libnsl-2.38-119.oe2403sp1.x86_64.rpm",
          "nscd-2.38-119.oe2403sp1.x86_64.rpm",
          "nss_modules-2.38-119.oe2403sp1.x86_64.rpm"
        ]
      },
      "package": {
        "ecosystem": "openEuler:24.03-LTS-SP1",
        "name": "glibc",
        "purl": "pkg:rpm/openEuler/glibc\u0026distro=openEuler-24.03-LTS-SP1"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "2.38-119.oe2403sp1"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    },
    {
      "ecosystem_specific": {
        "aarch64": [
          "glibc-2.38-119.oe2403sp3.aarch64.rpm",
          "glibc-all-langpacks-2.38-119.oe2403sp3.aarch64.rpm",
          "glibc-common-2.38-119.oe2403sp3.aarch64.rpm",
          "glibc-debuginfo-2.38-119.oe2403sp3.aarch64.rpm",
          "glibc-debugsource-2.38-119.oe2403sp3.aarch64.rpm",
          "glibc-debugutils-2.38-119.oe2403sp3.aarch64.rpm",
          "glibc-devel-2.38-119.oe2403sp3.aarch64.rpm",
          "glibc-locale-archive-2.38-119.oe2403sp3.aarch64.rpm",
          "glibc-locale-source-2.38-119.oe2403sp3.aarch64.rpm",
          "glibc-nss-devel-2.38-119.oe2403sp3.aarch64.rpm",
          "libnsl-2.38-119.oe2403sp3.aarch64.rpm",
          "nscd-2.38-119.oe2403sp3.aarch64.rpm",
          "nss_modules-2.38-119.oe2403sp3.aarch64.rpm"
        ],
        "noarch": [
          "glibc-help-2.38-119.oe2403sp3.noarch.rpm"
        ],
        "src": [
          "glibc-2.38-119.oe2403sp3.src.rpm"
        ],
        "x86_64": [
          "glibc-2.38-119.oe2403sp3.x86_64.rpm",
          "glibc-all-langpacks-2.38-119.oe2403sp3.x86_64.rpm",
          "glibc-common-2.38-119.oe2403sp3.x86_64.rpm",
          "glibc-debuginfo-2.38-119.oe2403sp3.x86_64.rpm",
          "glibc-debugsource-2.38-119.oe2403sp3.x86_64.rpm",
          "glibc-debugutils-2.38-119.oe2403sp3.x86_64.rpm",
          "glibc-devel-2.38-119.oe2403sp3.x86_64.rpm",
          "glibc-locale-archive-2.38-119.oe2403sp3.x86_64.rpm",
          "glibc-locale-source-2.38-119.oe2403sp3.x86_64.rpm",
          "glibc-nss-devel-2.38-119.oe2403sp3.x86_64.rpm",
          "libnsl-2.38-119.oe2403sp3.x86_64.rpm",
          "nscd-2.38-119.oe2403sp3.x86_64.rpm",
          "nss_modules-2.38-119.oe2403sp3.x86_64.rpm"
        ]
      },
      "package": {
        "ecosystem": "openEuler:24.03-LTS-SP3",
        "name": "glibc",
        "purl": "pkg:rpm/openEuler/glibc\u0026distro=openEuler-24.03-LTS-SP3"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
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            {
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            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    },
    {
      "ecosystem_specific": {
        "aarch64": [
          "glibc-2.38-119.oe2403sp4.aarch64.rpm",
          "glibc-all-langpacks-2.38-119.oe2403sp4.aarch64.rpm",
          "glibc-common-2.38-119.oe2403sp4.aarch64.rpm",
          "glibc-debuginfo-2.38-119.oe2403sp4.aarch64.rpm",
          "glibc-debugsource-2.38-119.oe2403sp4.aarch64.rpm",
          "glibc-debugutils-2.38-119.oe2403sp4.aarch64.rpm",
          "glibc-devel-2.38-119.oe2403sp4.aarch64.rpm",
          "glibc-locale-archive-2.38-119.oe2403sp4.aarch64.rpm",
          "glibc-locale-source-2.38-119.oe2403sp4.aarch64.rpm",
          "glibc-nss-devel-2.38-119.oe2403sp4.aarch64.rpm",
          "libnsl-2.38-119.oe2403sp4.aarch64.rpm",
          "nscd-2.38-119.oe2403sp4.aarch64.rpm",
          "nss_modules-2.38-119.oe2403sp4.aarch64.rpm"
        ],
        "noarch": [
          "glibc-help-2.38-119.oe2403sp4.noarch.rpm"
        ],
        "src": [
          "glibc-2.38-119.oe2403sp4.src.rpm"
        ],
        "x86_64": [
          "glibc-2.38-119.oe2403sp4.x86_64.rpm",
          "glibc-all-langpacks-2.38-119.oe2403sp4.x86_64.rpm",
          "glibc-common-2.38-119.oe2403sp4.x86_64.rpm",
          "glibc-debuginfo-2.38-119.oe2403sp4.x86_64.rpm",
          "glibc-debugsource-2.38-119.oe2403sp4.x86_64.rpm",
          "glibc-debugutils-2.38-119.oe2403sp4.x86_64.rpm",
          "glibc-devel-2.38-119.oe2403sp4.x86_64.rpm",
          "glibc-locale-archive-2.38-119.oe2403sp4.x86_64.rpm",
          "glibc-locale-source-2.38-119.oe2403sp4.x86_64.rpm",
          "glibc-nss-devel-2.38-119.oe2403sp4.x86_64.rpm",
          "libnsl-2.38-119.oe2403sp4.x86_64.rpm",
          "nscd-2.38-119.oe2403sp4.x86_64.rpm",
          "nss_modules-2.38-119.oe2403sp4.x86_64.rpm"
        ]
      },
      "package": {
        "ecosystem": "openEuler:24.03-LTS-SP4",
        "name": "glibc",
        "purl": "pkg:rpm/openEuler/glibc\u0026distro=openEuler-24.03-LTS-SP4"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "2.38-119.oe2403sp4"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "database_specific": {
    "severity": "Critical"
  },
  "details": "The GNU C Library project provides the core libraries for the GNU system and GNU/Linux systems, as well as many other systems that use Linux as the kernel. These libraries provide critical APIs including ISO C11, POSIX.1-2008, BSD, OS-specific APIs and more. These APIs include such foundational facilities as open, read, write, malloc, printf, getaddrinfo, dlopen, pthread_create, crypt,  login, exit and more.\r\n\r\nSecurity Fix(es):\n\nCalling wordexp with WRDE_APPEND in the GNU C Library version 2.0 to version 2.43\u00a0can cause the interface to return invalid memory in the we_wordv member, which on subsequent calls to wordfree may abort the process.(CVE-2026-6368)\n\nWhen expanding paths that begin with a tilde (~) followed by a username, the internal parse_tilde function extracts the username to determine the user\u0026apos;s home directory.  The implementation allocates memory for this username directly on the stack using the strndupa macro. Because the size of this allocation was determined by the length of the user-supplied input without any bounds checks, passing an excessively long username e.g. thousands of characters, forces the thread to exhaust its stack space. Thus if an application passes untrusted, attacker-controlled input to the wordexp function, an attacker can trigger a stack clash.(CVE-2026-6791)",
  "id": "OESA-2026-3418",
  "modified": "2026-08-20T09:55:09Z",
  "published": "2026-08-20T09:55:09Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://www.openeuler.org/zh/security/security-bulletins/detail/?id=openEuler-SA-2026-3418"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-6368"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-6791"
    }
  ],
  "schema_version": "1.7.2",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H",
      "type": "CVSS_V3"
    }
  ],
  "summary": "glibc security update",
  "upstream": [
    "CVE-2026-6368",
    "CVE-2026-6791"
  ]
}

CVE-2026-6368 (GCVE-0-2026-6368)

Vulnerability from cvelistv5 – Published: 2026-08-10 18:40 – Updated: 2026-08-12 18:01

Title

wordexp with WRDE_APPEND can return or use invalid memory

Summary

Severity

2.1 (Low)


                        
                          CVSS:4.0/AV:L/AC:H/AT:P/PR:N/UI:N/VC:L/VI:L/VA:L/SC:L/SI:L/SA:L/S:P/AU:Y/U:Green

SSVC

Exploitation: none Automatable: no Technical Impact: partial

CISA Coordinator · CISA-ADP (v2.0.3)

Decision recorded 2026-08-12 18:00 UTC

CWE

CWE-908 - Use of uninitialized resource

Assigner

glibc redhat root

References

2 references

URL	Tags
https://sourceware.org/bugzilla/show_bug.cgi?id=34090	issue-tracking
https://sourceware.org/git/?p=glibc.git;a=blob;f=…	vendor-advisory

Impacted products

1 product

Vendor	Product	Version
glibc	glibc	Affected: 1.93-260 , < 2.43 (custom)

Date Public

2026-07-01 18:29

Credits

shinobu

Show details on NVD website

JSON

To clipboard

{
  "containers": {
    "adp": [
      {
        "metrics": [
          {
            "other": {
              "content": {
                "id": "CVE-2026-6368",
                "options": [
                  {
                    "Exploitation": "none"
                  },
                  {
                    "Automatable": "no"
                  },
                  {
                    "Technical Impact": "partial"
                  }
                ],
                "role": "CISA Coordinator",
                "timestamp": "2026-08-12T18:00:42.782444Z",
                "version": "2.0.3"
              },
              "type": "ssvc"
            }
          }
        ],
        "providerMetadata": {
          "dateUpdated": "2026-08-12T18:01:05.410Z",
          "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
          "shortName": "CISA-ADP"
        },
        "title": "CISA ADP Vulnrichment"
      }
    ],
    "cna": {
      "affected": [
        {
          "collectionURL": "https://sourceware.org/glibc/",
          "defaultStatus": "unaffected",
          "packageName": "glibc",
          "platforms": [
            "Linux"
          ],
          "product": "glibc",
          "repo": "https://sourceware.org/git/?p=glibc.git",
          "vendor": "glibc",
          "versions": [
            {
              "lessThan": "2.43",
              "status": "affected",
              "version": "1.93-260",
              "versionType": "custom"
            }
          ]
        }
      ],
      "credits": [
        {
          "lang": "en",
          "type": "finder",
          "value": "shinobu"
        }
      ],
      "datePublic": "2026-07-01T18:29:00.000Z",
      "descriptions": [
        {
          "lang": "en",
          "supportingMedia": [
            {
              "base64": false,
              "type": "text/html",
              "value": "Calling wordexp with WRDE_APPEND in the GNU C Library version 2.0 to version 2.43\u0026nbsp;can cause the interface to return invalid memory in the we_wordv member, which on subsequent calls to wordfree may abort the process."
            }
          ],
          "value": "Calling wordexp with WRDE_APPEND in the GNU C Library version 2.0 to version 2.43\u00a0can cause the interface to return invalid memory in the we_wordv member, which on subsequent calls to wordfree may abort the process."
        }
      ],
      "impacts": [
        {
          "capecId": "CAPEC-129",
          "descriptions": [
            {
              "lang": "en",
              "value": "CAPEC-129 Pointer Manipulation"
            }
          ]
        }
      ],
      "metrics": [
        {
          "cvssV4_0": {
            "Automatable": "YES",
            "Recovery": "NOT_DEFINED",
            "Safety": "PRESENT",
            "attackComplexity": "HIGH",
            "attackRequirements": "PRESENT",
            "attackVector": "LOCAL",
            "baseScore": 2.1,
            "baseSeverity": "LOW",
            "exploitMaturity": "NOT_DEFINED",
            "privilegesRequired": "NONE",
            "providerUrgency": "GREEN",
            "subAvailabilityImpact": "LOW",
            "subConfidentialityImpact": "LOW",
            "subIntegrityImpact": "LOW",
            "userInteraction": "NONE",
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CVE-2026-6791 (GCVE-0-2026-6791)

Vulnerability from cvelistv5 – Published: 2026-08-10 18:41 – Updated: 2026-08-12 18:01

Title

Potential stack-based buffer clash during tilde expansion in wordexp

Summary

Severity

6.6 (Medium)


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

SSVC

Exploitation: none Automatable: no Technical Impact: partial

CISA Coordinator · CISA-ADP (v2.0.3)

Decision recorded 2026-08-12 18:01 UTC

CWE

CWE-121 - Stack-based buffer overflow

Assigner

glibc redhat root

References

1 reference

URL	Tags
https://sourceware.org/bugzilla/show_bug.cgi?id=34091	issue-tracking

Impacted products

1 product

Vendor	Product	Version
The GNU C Library	glibc	Affected: 2.0 , ≤ 2.43 (custom)

Credits

storm / 고준용 <rhwnsdyd1112@gmail.com>

Show details on NVD website

JSON

To clipboard

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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-2026-3418 (CVE-2026-6368)

CVE-2026-6368 (GCVE-0-2026-6368)

CVE-2026-6791 (GCVE-0-2026-6791)

Tags

Sightings

Nomenclature

Related by attack behaviour