3.7

CVE-2026-97399: the gnu c library glibc Buffer Over-read

CVSS: 3.7v3.1LowAwaiting analysis
AliasesUBUNTU-CVE-2026-97399DEBIAN-CVE-2026-97399CGA-2g6q-52xc-qfwv
Published 28-09-2026Last modified 28-09-2026
Open JSON

Vulnerability summary

CVE-2026-97399 is a low (CVSS 3.7) Buffer Over-read vulnerability in the gnu c library glibc. EPSS estimates a 0.29% chance of exploitation in the next 30 days, higher than 20.4% of scored vulnerabilities.

Overall risk
15/100
0100
Low · default modelHow is this calculated?
CVSS score
3.7/10
010
Low · v3.1 (CVE.org)
EPSS score
0.29%
0%100%
Low · Change unavailable
KEVNot listedIn no KEV catalog
RansomwareNone recordedNo known use recorded
Public exploits0No public exploits recorded

Advisory lineage

Upstream 0 · Downstream 3 · Related 3
OPENSUSE-SU-2026:12072-1SUSE-SU-2026:4591-1SUSE-SU-2026:4656-1

Timeline

  1. 28-09-2026
    PublishedVulnerability first disclosed.
  2. 28-09-2026
    Last modifiedVulnerability information updated.

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.

CVSS metrics

4 scores · 4 sources · 1 version

EPSS trend

Probability

0.29%

Chance of exploitation in the next 30 days

Percentile

20%

Versus all other CVEs

30-day change

Change unavailable

Change unavailable

29-09-202620-10-2026
EPSS score
0.29%

Known exploited

Compare KEV catalogs

Not in any of the 3 tracked catalogs.

Public exploits

0 found

No public exploits indexed.

Weaknesses

CWE · root cause

Affected systems

Chainguard54 products
  • glibc-2.43All versions (No fix recorded)
  • glibc-2.43-abi-reportAll versions (No fix recorded)
  • glibc-2.43-devAll versions (No fix recorded)
  • glibc-2.43-iconvAll versions (No fix recorded)
  • glibc-2.43-locale-caAll versions (No fix recorded)
Wolfi54 products
  • glibc-2.43All versions (No fix recorded)
  • glibc-2.43-abi-reportAll versions (No fix recorded)
  • glibc-2.43-devAll versions (No fix recorded)
  • glibc-2.43-iconvAll versions (No fix recorded)
  • glibc-2.43-locale-caAll versions (No fix recorded)
Ubuntu2 products
  • eglibcAll versions (No fix recorded)
  • glibcAll versions (No fix recorded)
Debian1 product
  • glibcAll versions (No fix recorded) | < 2.43-7
The gnu c library1 product

5 vendors · 112 products

References

7 links