Home / mailings [SECURITY] [DSA 6114-1] pyasn1 security update
Posted on 28 January 2026
Debian Security Advisory- -------------------------------------------------------------------------
Debian Security Advisory DSA-6114-1 security@debian.org
https://www.debian.org/security/ Salvatore Bonaccorso
January 28, 2026 https://www.debian.org/security/faq
- -------------------------------------------------------------------------
Package : pyasn1
CVE ID : CVE-2026-23490
Debian Bug : 1125753
It was discovered that pyasn1, a generic ASN.1 library for Python, is
prone to a denial of service vulnerability, which may result in memory
exhaustion from malformed OID/RELATIVE-OID with excessive continuation
octets.
For the oldstable distribution (bookworm), this problem has been fixed
in version 0.4.8-3+deb12u1.
For the stable distribution (trixie), this problem has been fixed in
version 0.6.1-1+deb13u1.
We recommend that you upgrade your pyasn1 packages.
For the detailed security status of pyasn1 please refer to its security
tracker page at:
https://security-tracker.debian.org/tracker/pyasn1
Further information about Debian Security Advisories, how to apply
these updates to your system and frequently asked questions can be
found at: https://www.debian.org/security/
Mailing list: debian-security-announce@lists.debian.org
