TI-2026-64049 Aliases CVE-2026-97399 GHSA-qhjw-2xw3-v2hv

One-byte overread in strncasecmp on Power8

LOW 17CWE-126Published 2026-09-28 · Updated 2026-09-28

Key facts

Attack vector: Network
Privileges required: None
User interaction: None
Attack complexity: High
Impact type: —
Confidentiality · integrity · availability: None · None · Low
Fix status: Partial Red Hat: 8 without a fix

Attack profile from CVSS 3.1 · CNA. Fix status from CNA and Red Hat.

Summary

The strncasecmp function in the GNU C Library 2.24 and later optimized for the Power8 architecture may read one byte beyond the input size limit, which may crash a program when that byte is not readable. This condition may happen when the input strings to the strncasecmp function are attacker controlled in an application and they match all the way up to the edge of their page and the neighbouring page is either not mapped or is not readable.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV

EPSS 0.00281 20th percentileScored 2026-11-07

Fix Partial glibc (The GNU C Library): 2.45Red Hat: 8 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

Vendor	Product	Affected versions	Fixed in	Status	Source
GNU	glibc	2.24 to before 2.45	2.45	Patch available	CNA

glibc VendorGNU Affected 2.24 to before 2.45 Fixed in 2.45 Patch available CNA

CPE names Threatist (inferred) · 1

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

CPE	Versions	Role	Vendor
cpe:2.3:a:gnu:glibc::::::::	—	—	GNU

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

Remediation

Fix · CNA glibc (The GNU C Library) Fixed in 2.45

Vendor assessments

Red Hat

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

Product	Status	Plan or fix
Red Hat Enterprise Linux 10	Affected	No fix yet
Red Hat Enterprise Linux 6	Affected	No fix planned: Out of support scope
Red Hat Enterprise Linux 7	Affected	No fix yet: Fix deferred
Red Hat Enterprise Linux 8	Affected	No fix yet: Fix deferred
Red Hat Enterprise Linux 9	Affected	No fix yet
Red Hat OpenShift AI (RHOAI)	Affected	—
Red Hat OpenShift Container Platform 4	Affected	No fix yet: Fix deferred
Red Hat OpenShift Container Platform 5	Affected	No fix yet: Fix deferred

Not affected: 2 products

Red Hat Hardened Images
Red Hat OpenShift AI (RHOAI)

Timeline

2026-10-02 Threatist record created from CVE-2026-97399
2026-10-03 Alias added: GHSA-qhjw-2xw3-v2hv
2026-10-30 Affected versions changed · Red Hat
2026-11-07 Affected versions changed · Red Hat

References

Advisory 1

https://sourceware.org/git/?p=glibc.git;a=blob_plain;f=advisories/GLIBC-SA-2026-0024

Other 1

https://sourceware.org/bugzilla/show_bug.cgi?id=34683

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

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