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TI-2026-85115 Aliases CVE-2026-122054GHSA-5wwm-g25c-cpx8

Hang in glibc BIG-HKSCS decoding on crafted input

Priority LOW 27CWE-835Published · Updated

Key facts

Attack vector
Network
Privileges required
None
User interaction
None
Attack complexity
High
Impact type
Denial of service
Confidentiality · integrity · availability
None · None · High
Fix status
No fix listed

Attack profile from CVSS 3.1 · CNA. Fix status from CNA and Red Hat. Impact type from CWE-835.

Summary

The GNU C Library (glibc) from 2.18 through 2.31 contains a loop with no reachable exit (CWE-835) in its BIG-HKSCS converter. Converting crafted BIG-HKSCS input to UCS-4 or the internal wide character encoding, for example with iconv, makes the converter stop making progress and hangs the calling application. An unauthenticated remote attacker who can supply such input to an application can cause the hang, with an impact on availability only.

Written with Claude Haiku 5.5 from the sources below · 2026-11-06

Description from the CNA

Converting crafted BIG-HKSCS input to UCS-4 or the internal wide character encoding, for example with iconv, in the GNU C Library version 2.18 through 2.31 may result in the converter making no progress, causing the calling application to hang.

Why it matters now

EPSS 0.00446 39th percentileScored 2026-11-07
Fix No fix listed No fixed version in the sources yet

SSVC decision points

Not available: CISA has not published SSVC decision points for this record.

Affected products

VendorProductAffected versionsFixed inStatusSource
GNUglibc2.18 – 2.31—No fix listedCNA
  • glibc VendorGNU Affected 2.18 – 2.31 Fixed in — No fix listed CNA

CPE names Threatist (inferred) · 1

Inferred from how NVD named this product before; not given by a source.

CPEVersionsRoleVendor
cpe:2.3:a:gnu:glibc:*:*:*:*:*:*:*:*——GNU
  • cpe:2.3:a:gnu:glibc:*:*:*:*:*:*:*:* Versions — — ·GNU

Remediation

The sources list no fixed version for glibc. Red Hat lists 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 and other products as affected without a fix.

Written with Claude Haiku 5.5 from the sources below · 2026-11-06

Vendor assessments

Red Hat

Red Hat rating: Moderate. Red Hat's page for this CVE →

ProductStatusPlan or fix
Red Hat Enterprise Linux 10Affected—
Red Hat Enterprise Linux 6Affected—
Red Hat Enterprise Linux 7Affected—
Red Hat Enterprise Linux 8Affected—
Red Hat Enterprise Linux 9Affected—
Red Hat Hardened ImagesAffected—
Red Hat OpenShift Container Platform 4Affected—
Red Hat OpenShift Container Platform 5Affected—

Timeline

  1. 2026-11-04 Threatist record created from CVE-2026-122054
  2. 2026-11-04 Alias added: GHSA-5wwm-g25c-cpx8
  3. 2026-11-06 Priority changed: MEDIUM → LOW
  4. 2026-11-06 Affected versions changed · Red Hat
  5. 2026-11-06 CVSS score added · Red Hat

References

Advisory 1

Other 1

  • TI-2026-19388 telnetd in GNU Inetutils through 2.7 allows remote authentication bypass via a "-f root"… KEVCVSS 3.1CRITICAL 9.8
  • TI-2014-05975 GNU Bash through 4.3 bash43-025 processes trailing strings after certain malformed… KEVCVSS 3.1CRITICAL 9.8
  • TI-2014-05157 GNU Bash through 4.3 processes trailing strings after function definitions in the values… KEVCVSS 3.1CRITICAL 9.8
  • TI-2014-05164 GNU Bash through 4.3 bash43-026 does not properly parse function definitions in the… KEVCVSS 3.1HIGH 8.8
  • TI-2023-04522 Glibc: buffer overflow in ld.so leading to privilege escalation KEVCVSS 3.1HIGH 7.8
  • TI-2009-03392 The TLS protocol, and the SSL protocol 3.0 and possibly earlier, as used in Microsoft… CVSS 3.1CRITICAL 9.8
See all 1272 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences