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TI-2026-53861 Aliases CVE-2026-77117GHSA-g8c6-x9r9-wj7f

SHIFT_JISX0213 decoding may hang on crafted input

Priority LOW 26CWE-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
Partial Red Hat: 13 fixed, 4 without a fix

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

Summary

Converting crafted SHIFT_JISX0213 input to UCS-4 or the internal wide character encoding, for example with iconv, in the GNU C Library version 2.3 to 2.44 may result in the converter making no progress, causing the calling application to hang. Some SHIFT_JISX0213 sequences decode to two code points. If the output buffer has room for only the first one, the converter stores the second in the conversion state and returns E2BIG, but it never clears that pending character after emitting it on the next call. The converter then keeps emitting the pending character without consuming further input, so an application that retries the conversion loops forever. The input must be attacker controlled and the application must convert it with an output buffer small enough to split the two code points. Only the SHIFT_JISX0213 character set is affected, which is not commonly used. The related defect in the EUC_JISX0213 converter is tracked separately as CVE-2026-80489.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00358 29th percentileScored 2026-11-07
Fix Partial Red Hat: 7 advisoriesRed Hat: 13 fixed, 4 without a fix

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
None
Automatable
No
Technical impact
Partial

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

VendorProductAffected versionsFixed inStatusSource
GNUglibc2.3 – 2.44—No fix listedCNA
  • glibc VendorGNU Affected 2.3 – 2.44 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

Red Hat 7 advisories

  • RHSA-2026:95264 Released 2026-11-04 · Red Hat rating Critical
    Cost Management Metrics Operator Update
    • Cost Management 4 registry.redhat.io/costmanagement/costmanagement-metrics-rhel9-operator
  • RHSA-2026:87400 Released 2026-10-21 · Red Hat rating Important
    Red Hat Cost Management On-Premise container image update
    • Red Hat Cost Management On-Premise 1 registry.redhat.io/costmanagement/costmanagement-ui-rhel10
  • RHSA-2026:84753 Released 2026-10-19 · Red Hat rating Moderate
    glibc security update
    • Red Hat Enterprise Linux AppStream (v. 10) glibc-devel-2.39-145.el10_2, glibc-doc-2.39-145.el10_2, glibc-locale-source-2.39-145.el10_2 +1
    • Red Hat Enterprise Linux BaseOS (v. 10) glibc-2.39-145.el10_2, glibc-all-langpacks-2.39-145.el10_2, glibc-common-2.39-145.el10_2 +47
    • Red Hat Enterprise Linux CodeReady Linux Builder (v. 10) glibc-benchtests-2.39-145.el10_2, glibc-nss-devel-2.39-145.el10_2, glibc-static-2.39-145.el10_2 +2
Show 4 more Red Hat advisories
  • RHSA-2026:82939 Released 2026-10-14 · Red Hat rating Important
    Red Hat Update Infrastructure 5.3 security update
    • Red Hat Update Infrastructure 5 registry.redhat.io/rhui5/cds-kubernetes-rhel9, registry.redhat.io/rhui5/cds-rhel9, registry.redhat.io/rhui5/haproxy-rhel9 +2
  • RHSA-2026:80798 Released 2026-10-12 · Red Hat rating Moderate
    glibc security update
    • Red Hat Enterprise Linux AppStream (v. 8) compat-libpthread-nonshared-2.28-251.el8_10.48, glibc-utils-2.28-251.el8_10.48
    • Red Hat Enterprise Linux BaseOS (v. 8) glibc-2.28-251.el8_10.48, glibc-all-langpacks-2.28-251.el8_10.48, glibc-common-2.28-251.el8_10.48 +47
    • Red Hat Enterprise Linux CRB (v. 8) glibc-benchtests-2.28-251.el8_10.48, glibc-nss-devel-2.28-251.el8_10.48, glibc-static-2.28-251.el8_10.48 +1
  • RHSA-2026:79281 Released 2026-10-08 · Red Hat rating Moderate
    glibc security, bug fix, and enhancement update
    • Red Hat Enterprise Linux AppStream (v. 9) glibc-devel-2.34-283.el9_8, glibc-doc-2.34-283.el9_8, glibc-headers-2.34-283.el9_8 +2
    • Red Hat Enterprise Linux BaseOS (v. 9) glibc-2.34-283.el9_8, glibc-all-langpacks-2.34-283.el9_8, glibc-common-2.34-283.el9_8 +47
    • Red Hat Enterprise Linux CodeReady Linux Builder (v. 9) glibc-benchtests-2.34-283.el9_8, glibc-nss-devel-2.34-283.el9_8, glibc-static-2.34-283.el9_8 +2
  • RHSA-2026:61737 Released 2026-08-31 · Red Hat rating Moderate
    Red Hat Hardened Images RPMs bug fix and enhancement update
    • Red Hat Hardened Images compat-libpthread-nonshared-2.43-8.4.hum1@aarch64, compat-libpthread-nonshared-2.43-8.4.hum1@x86_64, glibc-2.43-8.4.hum1@aarch64 +47

Vendor assessments

Red Hat

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

ProductStatusPlan or fix
Red Hat Enterprise Linux 6AffectedNo fix yet: Fix deferred
Red Hat Enterprise Linux 7AffectedNo fix yet: Fix deferred
Red Hat OpenShift Container Platform 4AffectedNo fix yet: Fix deferred
Red Hat OpenShift Container Platform 5AffectedNo fix yet: Fix deferred
Cost Management 4Fixed RHSA-2026:95264
Red Hat Cost Management On-Premise 1Fixed RHSA-2026:87400
Red Hat Enterprise Linux AppStream (v. 10)Fixed RHSA-2026:84753
Red Hat Enterprise Linux AppStream (v. 8)Fixed RHSA-2026:80798
Red Hat Enterprise Linux AppStream (v. 9)Fixed RHSA-2026:79281
Red Hat Enterprise Linux BaseOS (v. 10)Fixed RHSA-2026:84753
Red Hat Enterprise Linux BaseOS (v. 8)Fixed RHSA-2026:80798
Red Hat Enterprise Linux BaseOS (v. 9)Fixed RHSA-2026:79281
Red Hat Enterprise Linux CRB (v. 8)Fixed RHSA-2026:80798
Red Hat Enterprise Linux CodeReady Linux Builder (v. 10)Fixed RHSA-2026:84753
Red Hat Enterprise Linux CodeReady Linux Builder (v. 9)Fixed RHSA-2026:79281
Red Hat Hardened ImagesFixed RHSA-2026:61737
Red Hat Update Infrastructure 5Fixed RHSA-2026:82939
Not affected: 2 products
  • Cost Management 4
  • Red Hat OpenShift AI (RHOAI)

Timeline

  1. 2026-10-02 Threatist record created from CVE-2026-77117
  2. 2026-10-03 Alias added: GHSA-g8c6-x9r9-wj7f
  3. 2026-10-09 Fix available: RHSA-2026:79281 · Red Hat
  4. 2026-10-09 Fix available: Red Hat Enterprise Linux AppStream (v. 9), Red Hat Enterprise Linux BaseOS (v. 9), Red Hat Enterprise Linux CodeReady Linux Builder (v. 9) · Red Hat
  5. 2026-10-13 Fix available: RHSA-2026:80798 · Red Hat
  6. 2026-10-13 Fix available: Red Hat Enterprise Linux AppStream (v. 8), Red Hat Enterprise Linux BaseOS (v. 8), Red Hat Enterprise Linux CRB (v. 8) · Red Hat
  7. 2026-10-16 Fix available: RHSA-2026:82939 · Red Hat
  8. 2026-10-16 Fix available: Red Hat Update Infrastructure 5 · Red Hat
  9. 2026-10-20 Fix available: RHSA-2026:84753 · Red Hat
  10. 2026-10-20 Fix available: Red Hat Enterprise Linux AppStream (v. 10), Red Hat Enterprise Linux BaseOS (v. 10), Red Hat Enterprise Linux CodeReady Linux Builder (v. 10) · Red Hat
  11. 2026-10-22 Fix available: RHSA-2026:87400 · Red Hat
  12. 2026-10-23 Fix available: Red Hat Cost Management On-Premise 1 · Red Hat
  13. 2026-11-03 Affected versions changed · Red Hat
  14. 2026-11-06 Fix available: Cost Management 4 · Red Hat
  15. 2026-11-06 Fix available: RHSA-2026:95264 · Red Hat
  16. 2026-11-06 Affected versions changed · 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