High severity · published Jan 15, 2026
CVE-2026-0915
getnetbyaddr and getnetbyaddr_r leak stack contents to DNS resovler
7.5
CVSS
0.6%
EPSS
No
On KEV
Description
Calling getnetbyaddr or getnetbyaddr_r with a configured nsswitch.conf that specifies the library's DNS backend for networks and queries for a zero-valued network in the GNU C Library version 2.0 to version 2.42 can leak stack contents to the configured DNS resolver.
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
Attack vector
Network
Complexity
Low
Privileges
None
User interaction
None
Confidentiality
High
Integrity
None
Availability
None
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)0.6% · higher than 49% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
GL
glibc · The GNU C Library
2.0 through 2.42 · source: vendor, NVD
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-0915
CVE.org
https://www.cve.org/CVERecord?id=CVE-2026-0915
Broken Link
https://sourceware.org/bugzilla/show_bug.cgi?id=33802
Mailing List
http://www.openwall.com/lists/oss-security/2026/01/16/6
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