- Issued:
- 2026-08-25
- Updated:
- 2026-08-25
RHSA-2026:59240 - Security Advisory
Synopsis
Important: python-pyasn1 security update
Type/Severity
Security Advisory: Important
Red Hat Lightspeed patch analysis
Identify and remediate systems affected by this advisory.
Topic
An update for python-pyasn1 is now available for Red Hat Enterprise Linux 7 Extended Lifecycle Support.
Red Hat Product Security has rated this update as having a security impact of Important. A Common Vulnerability Scoring System (CVSS) base score, which gives a detailed severity rating, is available for each vulnerability from the CVE link(s) in the References section.
Description
Python is an interpreted, interactive, object-oriented programming language, which includes modules, classes, exceptions, very high level dynamic data types and dynamic typing. Python supports interfaces to many system calls and libraries, as well as to various windowing systems.
Security Fix(es):
- pyasn1: pyasn1: Denial of Service via crafted ASN.1 REAL values (CVE-2026-59886)
For more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and other related information, refer to the CVE page(s) listed in the References section.
Solution
For details on how to apply this update, which includes the changes described in this advisory, refer to:
Affected Products
- Red Hat Enterprise Linux Server - Extended Life Cycle Support 7 x86_64
- Red Hat Enterprise Linux Server - Extended Life Cycle Support (for IBM z Systems) 7 s390x
- Red Hat Enterprise Linux Server - Extended Life Cycle Support for IBM Power, big endian 7 ppc64
- Red Hat Enterprise Linux Server - Extended Life Cycle Support for IBM Power, little endian 7 ppc64le
Fixes
- BZ - 2500041 - CVE-2026-59886 pyasn1: pyasn1: Denial of Service via crafted ASN.1 REAL values
CVEs
Red Hat Enterprise Linux Server - Extended Life Cycle Support 7
| SRPM | |
|---|---|
| python-pyasn1-0.1.9-7.el7_9.3.src.rpm | SHA-256: a07c1347d314e87ee41b2580b03acb2c57b311d786c775375b32fe295d785221 |
| x86_64 | |
| python2-pyasn1-0.1.9-7.el7_9.3.noarch.rpm | SHA-256: a96a5828194d80a8acd1d197188cb67026cc6c89180a0e36f71a1cf7e8ed1d58 |
| python2-pyasn1-modules-0.1.9-7.el7_9.3.noarch.rpm | SHA-256: e9db264b12a21698d4b16d7a4b7722459f68b47c77bee91fac35e5f7bf0d8443 |
Red Hat Enterprise Linux Server - Extended Life Cycle Support (for IBM z Systems) 7
| SRPM | |
|---|---|
| python-pyasn1-0.1.9-7.el7_9.3.src.rpm | SHA-256: a07c1347d314e87ee41b2580b03acb2c57b311d786c775375b32fe295d785221 |
| s390x | |
| python2-pyasn1-0.1.9-7.el7_9.3.noarch.rpm | SHA-256: a96a5828194d80a8acd1d197188cb67026cc6c89180a0e36f71a1cf7e8ed1d58 |
| python2-pyasn1-modules-0.1.9-7.el7_9.3.noarch.rpm | SHA-256: e9db264b12a21698d4b16d7a4b7722459f68b47c77bee91fac35e5f7bf0d8443 |
Red Hat Enterprise Linux Server - Extended Life Cycle Support for IBM Power, big endian 7
| SRPM | |
|---|---|
| python-pyasn1-0.1.9-7.el7_9.3.src.rpm | SHA-256: a07c1347d314e87ee41b2580b03acb2c57b311d786c775375b32fe295d785221 |
| ppc64 | |
| python2-pyasn1-0.1.9-7.el7_9.3.noarch.rpm | SHA-256: a96a5828194d80a8acd1d197188cb67026cc6c89180a0e36f71a1cf7e8ed1d58 |
| python2-pyasn1-modules-0.1.9-7.el7_9.3.noarch.rpm | SHA-256: e9db264b12a21698d4b16d7a4b7722459f68b47c77bee91fac35e5f7bf0d8443 |
Red Hat Enterprise Linux Server - Extended Life Cycle Support for IBM Power, little endian 7
| SRPM | |
|---|---|
| python-pyasn1-0.1.9-7.el7_9.3.src.rpm | SHA-256: a07c1347d314e87ee41b2580b03acb2c57b311d786c775375b32fe295d785221 |
| ppc64le | |
| python2-pyasn1-0.1.9-7.el7_9.3.noarch.rpm | SHA-256: a96a5828194d80a8acd1d197188cb67026cc6c89180a0e36f71a1cf7e8ed1d58 |
| python2-pyasn1-modules-0.1.9-7.el7_9.3.noarch.rpm | SHA-256: e9db264b12a21698d4b16d7a4b7722459f68b47c77bee91fac35e5f7bf0d8443 |
The Red Hat security contact is secalert@redhat.com. More contact details at https://access.redhat.com/security/team/contact/