CVE-2025-13601: glib · Integer Overflow or Wraparound
Affects glibSource CVE Database V5
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
- 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:HExploitation evidence
Disclosed: evidence found.
CVE published 26 Nov 2025
Detectable: no evidence on record.
No public nuclei template indexed
Weaponised: no evidence on record.
No public exploit code indexed in Metasploit or Exploit-DB
Exploited in the wildExploited: no evidence on record.
Not in CISA KEV and no source reports exploitation
Observed by OffSeq MirageSeen by 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
| Product | Affected | Fixed in |
|---|---|---|
Red Hatredhat/glibpkg:rpm/redhat/glibOther threats | Affected
| Fixed in
|
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
- access.redhat.com/errata/RHSA-2026:0936 (opens in a new tab)
- access.redhat.com/errata/RHSA-2026:0975 (opens in a new tab)
- access.redhat.com/errata/RHSA-2026:0991 (opens in a new tab)
- access.redhat.com/errata/RHSA-2026:1323 (opens in a new tab)
- access.redhat.com/errata/RHSA-2026:1324 (opens in a new tab)
- access.redhat.com/errata/RHSA-2026:1326 (opens in a new tab)
- access.redhat.com/errata/RHSA-2026:1327 (opens in a new tab)
- access.redhat.com/errata/RHSA-2026:1465 (opens in a new tab)
- access.redhat.com/errata/RHSA-2026:1608 (opens in a new tab)
- access.redhat.com/errata/RHSA-2026:1624 (opens in a new tab)
- access.redhat.com/errata/RHSA-2026:1625 (opens in a new tab)
- access.redhat.com/errata/RHSA-2026:1626 (opens in a new tab)
- access.redhat.com/errata/RHSA-2026:1627 (opens in a new tab)
- access.redhat.com/errata/RHSA-2026:1652 (opens in a new tab)
- access.redhat.com/errata/RHSA-2026:1736 (opens in a new tab)
- access.redhat.com/errata/RHSA-2026:18344 (opens in a new tab)
- access.redhat.com/errata/RHSA-2026:18705 (opens in a new tab)
- access.redhat.com/errata/RHSA-2026:2064 (opens in a new tab)
- access.redhat.com/errata/RHSA-2026:2072 (opens in a new tab)
- access.redhat.com/errata/RHSA-2026:2485 (opens in a new tab)
- access.redhat.com/errata/RHSA-2026:2563 (opens in a new tab)
- access.redhat.com/errata/RHSA-2026:2633 (opens in a new tab)
- access.redhat.com/errata/RHSA-2026:2659 (opens in a new tab)
- access.redhat.com/errata/RHSA-2026:2671 (opens in a new tab)
- access.redhat.com/errata/RHSA-2026:2974 (opens in a new tab)
- access.redhat.com/errata/RHSA-2026:3415 (opens in a new tab)
- access.redhat.com/errata/RHSA-2026:4419 (opens in a new tab)
- access.redhat.com/errata/RHSA-2026:7461 (opens in a new tab)
- access.redhat.com/security/cve/CVE-2025-13601 (opens in a new tab)
- bugzilla.redhat.com/show_bug.cgi?id=2416741 (opens in a new tab)
- gitlab.gnome.org/GNOME/glib/-/issues/3827 (opens in a new tab)
- gitlab.gnome.org/GNOME/glib/-/merge_requests/4914 (opens in a new tab)
- cert-portal.siemens.com/productcert/html/ssa-253495.html (opens in a new tab)