Critical severity · published Jan 27, 2026
CVE-2026-24812
An improper pointer arithmetic in root-project/root at builtins/zlib/inftrees.c
9.3
CVSS
0.3%
EPSS
No
On KEV
Description
Vulnerability in root-project root (builtins/zlib modules). This vulnerability is associated with program files inftrees.C.
This issue affects root: through 6.36.00-rc1.
Exploitation
Is it being used?
Exploit prediction (EPSS)0.3% · higher than 24% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
RO
root · root-project
through 6.36.00-rc1 · source: vendor
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-24812
CVE.org
https://www.cve.org/CVERecord?id=CVE-2026-24812
github.com
https://github.com/root-project/root/pull/18527
root.cern
https://root.cern/blog/recent-common-vulnerabilities-when-does-ROOT-need-to-be-updated/
More from root
9.8
CVE-2026-24811
An improper pointer arithmetic in root-project/root at builtins/zlib/inffast.c