EUVD-2026-55727
GHSA-cm6j-gmqf-j2cm
Severity by source
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/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:P/AU:Y/R:X/V:X/RE:X/U:Green
Local attack vector with high complexity due to specific WRDE_APPEND call pattern precondition; no privileges required; scope unchanged as impact is confined to the calling process.
Primary rating from Vendor (glibc).
CVSS VectorVendor: glibc
Lifecycle Timeline
3DescriptionCVE.org
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.
AnalysisAI
Uninitialized memory exposure in GNU C Library (glibc) versions 2.0 through 2.43 corrupts the we_wordv member of the wordexp_t structure when wordexp is called with the WRDE_APPEND flag under specific conditions, causing a subsequent wordfree call to abort the calling process. Disclosed by the glibc project as GLIBC-SA-2026-0014 and rooted in CWE-908 (Use of Uninitialized Resource), the flaw carries a CVSS 4.0 base score of 2.1, reflecting meaningful exploitation constraints including a local attack vector and high complexity. …
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Attack ChainAIDerived
Hypothetical attack flow derived from CVE metadata
Vulnerability AssessmentAI
| Exploitation | Exploitation requires a local process - running under any user privilege level, including unprivileged - to call wordexp() with the WRDE_APPEND flag in a sequence that produces the invalid we_wordv memory condition, followed by a call to wordfree() on the resulting corrupt structure. … Additional conditions and limiting factors are described in the full assessment. |
| Risk Assessment | Real-world risk is low despite glibc's pervasive deployment. … Full risk analysis with EPSS, KEV, and SSVC signal comparison available after sign-in. |
| Exploit Scenario | Full exploit scenario with step-by-step reproduction available after sign-in. |
| Remediation | The primary remediation is to upgrade to a glibc release beyond version 2.43 once the glibc project publishes a patched version; however, a specific fixed release version is not confirmed in the available data - patch availability should be tracked directly against the upstream advisory at https://sourceware.org/git/?p=glibc.git;a=blob;f=advisories/GLIBC-SA-2026-0014 and the associated Bugzilla report at https://sourceware.org/bugzilla/show_bug.cgi?id=34090. … Detailed patch versions, workarounds, and compensating controls in full report. |
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Same weakness CWE-908 – Use of Uninitialized Resource
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External POC / Exploit Code
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