Medium [CVE-2026-77117] Non-progress DoS in SHIFT_JISX0213 ->
This medium-severity Red Hat Linux advisory covers CVE-2026-77117.
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Summary
A flaw was found in glibc. A remote attacker could exploit this vulnerability by providing specially crafted input during SHIFT_JISX0213 to UCS-4 text conversion.
This crafted input can cause the application to repeatedly emit a buffered code point without consuming further input, leading to persistent retry churn. This can result in a denial of service (DoS) for callers converting untrusted text.
This Moderate impact flaw in glibc's SHIFT_JISX0213 to UCS-4 conversion can lead to a denial of service. Exploitation requires an attacker to provide specially crafted input that an application converts using this specific path, triggering a 2-byte sequence and a caller that retries after an E2BIG error with insufficient output space.
Red Hat products are only affected if they utilize this uncommon conversion path and exhibit the described retry behavior. Red Hat severity: Moderate — CVSS 5.9 (CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H).
Weakness: CWE-835. Under investigation: Red Hat Enterprise Linux 10; Red Hat Enterprise Linux 6; Red Hat Enterprise Linux 7; Red Hat Enterprise Linux 8; Red Hat Enterprise Linux 9; Red Hat Hardened Images; Red Hat OpenShift Container Platform 4.
Affected versions
No affected-version range was extracted from the source record. The vendor advisory is authoritative — check it before change work.
Official advisory · high-confidence parse· fetched 53 minutes ago·verify at source
Fixed versions
No fixed release is recorded yet. That does not prove no patch exists — confirm against the vendor advisory.
Official advisory · high-confidence parse· fetched 53 minutes ago·verify at source
Mitigation checklist
- Mitigation for this issue is either not available or the currently available options do not meet the Red Hat Product Security criteria comprising ease of use and deployment, applicability to widespread installation base, or stability.
Official advisory · high-confidence parse· fetched 53 minutes ago·verify at source
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