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VulnerabilityPublished Updated

CVE-2025-13601: glib · Integer Overflow or Wraparound

Affects glibSource CVE Database V5

0

Not known to be exploited · CVSS 7.7 High : upgrade to 10.2 or 9.8 soon.

Data as of 26 Oct 2026, 10:12 UTC

CVSS 3.1 base score
7.7High
How severe the flaw is on the 0–10 CVSS scale.
EPSS
0.3% chance of exploitation in 30 days – higher than 25% of CVEsExploit Prediction Scoring System: the likelihood attackers will use this flaw soon.
Patch
Available – fixed in 10.2, 9.8
CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:H

Exploitation evidence

  1. Disclosed: evidence found.

    CVE published 26 Nov 2025

  2. Detectable: no evidence on record.

    No public nuclei template indexed

  3. Weaponised: no evidence on record.

    No public exploit code indexed in Metasploit or Exploit-DB

  4. Exploited in the wild: no evidence on record.

    Not in CISA KEV and no source reports exploitation

  5. Observed by OffSeq Mirage: no evidence on record.

    No attack traffic recorded by OffSeq Mirage sensors

A missing step is not evidence of safety. Sources: cve.org (opens in a new tab), the Metasploit, Exploit-DB and nuclei-templates index as of 26 Oct 2026.

What to do

Upgrade the Red Hat redhat/glib package to 10.2 or 9.8.

Affected software

ProductAffectedFixed in
Red Hatredhat/glibpkg:rpm/redhat/glibOther threatsAffected
  • =0
  • >=9.0 <9.8
  • >=10.0 <10.2
Fixed in
  • 9.8
  • 10.2

Check your own hosts for these packages with threat-finder (opens in a new tab), our free open-source scanner.

AI-suggested

Red Hat has released official security updates for glib2 that fix this vulnerability. Users should apply the updates provided in advisories RHSA-2026:0936 for Red Hat Enterprise Linux 9 and RHSA-2026:0975 for Red Hat Enterprise Linux 10. Detailed update instructions are available at https://access.redhat.com/articles/11258. Applying these updates mitigates the vulnerability.

Description

A heap-based buffer overflow problem was found in glib through an incorrect calculation of buffer size in the g_escape_uri_string() function. If the string to escape contains a very large number of unacceptable characters (which would need escaping), the calculation of the length of the escaped string could overflow, leading to a potential write off the end of the newly allocated string.

References

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