CVE-2026-5435
glibc: glibc: Out-of-bounds write via TSIG record processing
Severity
ModerateRed Hat Product Security
CVSS 3.1
Review impact separately from score.
Published · April 28, 2026
Updated · November 1, 2026
Description
A flaw was found in glibc, the GNU C Library. Specifically, deprecated functions responsible for printing TSIG (Transaction Signature) records fail to properly manage memory buffers. This oversight can lead to an out-of-bounds write when processing specially crafted TSIG records. An attacker could exploit this to cause a denial of service or potentially execute arbitrary code.
CVSS score applicability
The CVSS score(s) listed for this vulnerability do not reflect the associated product's status, and are included for informational purposes to better understand the severity of this vulnerability.
Mitigation
No mitigation is specified in collected source.
CVSS / CWE
CVSS 3.1 · 5.9CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:L/I:N/A:H
CWE-120 · Buffer Copy without Checking Size of Input ('Classic Buffer Overflow')