CVE-2026-97399

Publication date 28 September 2026

Last updated 14 November 2026

Ubuntu priority

Medium

Why this priority?

Cvss 3 Severity Score

3.7 · Low

Score breakdown

Description

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.

Read the notes from the security team

Status

Package Ubuntu Release Status
glibc 26.10 stonking
Not affected
26.04 LTS resolute
Fixed in 2.43-2ubuntu2.7
24.04 LTS noble
Fixed in 2.39-0ubuntu8.12
22.04 LTS jammy
Fixed in 2.35-0ubuntu3.18
20.04 LTS focal
Needs evaluation
18.04 LTS bionic
Needs evaluation
16.04 LTS xenial
Needs evaluation
eglibc 26.10 stonking Not in release
26.04 LTS resolute Not in release
24.04 LTS noble Not in release
22.04 LTS jammy Not in release
14.04 LTS trusty
Needs evaluation

Notes

mdeslaur

This is for power8 only, may only affect focal? Need to check.

Patch details

For informational purposes only. We recommend not to cherry-pick updates. How can I get the fixes?

Package Patch details
glibc

Severity score breakdown

CVSS version: CVSS v3.0

Base score 3.7 · Low

Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:L

References

Related Ubuntu Security Notices (USN)

    • USN-9065-1
    • GNU C Library vulnerabilities
    • 12 November 2026

Other references

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