Application hang via uncleared pending conversion state
Published Sep 15, 2026 · Updated Sep 15, 2026
Denial of service in glibc 2.3 through 2.44 allows remote attackers to hang calling applications via crafted EUC_JISX0213 input. The euc-jisx0213.c converter emits a saved second code point after E2BIG but does not clear the pending state, so retries repeat output without consuming input. Exploitation requires attacker-controlled text, the uncommon EUC_JISX0213 path, an output buffer that splits a two-code-point result, and a retry after E2BIG.
Summary
What happened
Denial of service in glibc 2.3 through 2.44 allows remote attackers to hang calling applications via crafted EUC_JISX0213 input. The euc-jisx0213.c converter emits a saved second code point after E2BIG but does not clear the pending state, so retries repeat output without consuming input. Exploitation requires attacker-controlled text, the uncommon EUC_JISX0213 path, an output buffer that splits a two-code-point result, and a retry after E2BIG.
The record
- CVE
- CVE-2026-80489
- Published
- Sep 15, 2026
- Updated
- Sep 15, 2026
- Vendor
- The GnuPG Project
- Product
- glibc
- Classifications
- T1499
- Attack vector
- network
- Privileges
- unauthenticated
Timeline
How it unfolded
- Sep 15, 2026CVE publishedPublication date reported by the CVE source.
- Sep 15, 2026Record updatedLatest update available in the CVE record.
Exploitability
Present is not the same as exploitable
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Is a vulnerable build present?
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- Affected versionversion=2.3 <=2.44
What conditions does exploitation require?
What is affected?
Published CVSS scores
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Attacks
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Weakness, pattern, technique
Public exploit references
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Technologies
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Your stack
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