- Issued:
- 2026-08-25
- Updated:
- 2026-08-25
RHSA-2026:59241 - 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 8.
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 for x86_64 8 x86_64
- Red Hat Enterprise Linux for IBM z Systems 8 s390x
- Red Hat Enterprise Linux for Power, little endian 8 ppc64le
- Red Hat Enterprise Linux for ARM 64 8 aarch64
- Red Hat Enterprise Linux for x86_64 - Extended Life Cycle 8.10 x86_64
- Red Hat Enterprise Linux for ARM 64 - Extended Life Cycle 8.10 aarch64
- Red Hat Enterprise Linux for Power, little endian - Extended Life Cycle 8.10 ppc64le
- Red Hat Enterprise Linux for IBM z Systems - Extended Life Cycle 8.10 s390x
Fixes
- BZ - 2500041 - CVE-2026-59886 pyasn1: pyasn1: Denial of Service via crafted ASN.1 REAL values
CVEs
Red Hat Enterprise Linux for x86_64 8
| SRPM | |
|---|---|
| python-pyasn1-0.3.7-6.el8_10.2.src.rpm | SHA-256: c857deae380b8fc8c9d4d933e3d1264c307378c283398ad628b69086c10d9233 |
| x86_64 | |
| python3-pyasn1-0.3.7-6.el8_10.2.noarch.rpm | SHA-256: 7a2d2334ba4a8b36f796c3db49c488d33c63e0149454d9995198503f4d34b100 |
| python3-pyasn1-modules-0.3.7-6.el8_10.2.noarch.rpm | SHA-256: a867d4419ff89238a3daa865ed29a8edce43f6c66dad1765da5788591a6da746 |
Red Hat Enterprise Linux for IBM z Systems 8
| SRPM | |
|---|---|
| python-pyasn1-0.3.7-6.el8_10.2.src.rpm | SHA-256: c857deae380b8fc8c9d4d933e3d1264c307378c283398ad628b69086c10d9233 |
| s390x | |
| python3-pyasn1-0.3.7-6.el8_10.2.noarch.rpm | SHA-256: 7a2d2334ba4a8b36f796c3db49c488d33c63e0149454d9995198503f4d34b100 |
| python3-pyasn1-modules-0.3.7-6.el8_10.2.noarch.rpm | SHA-256: a867d4419ff89238a3daa865ed29a8edce43f6c66dad1765da5788591a6da746 |
Red Hat Enterprise Linux for Power, little endian 8
| SRPM | |
|---|---|
| python-pyasn1-0.3.7-6.el8_10.2.src.rpm | SHA-256: c857deae380b8fc8c9d4d933e3d1264c307378c283398ad628b69086c10d9233 |
| ppc64le | |
| python3-pyasn1-0.3.7-6.el8_10.2.noarch.rpm | SHA-256: 7a2d2334ba4a8b36f796c3db49c488d33c63e0149454d9995198503f4d34b100 |
| python3-pyasn1-modules-0.3.7-6.el8_10.2.noarch.rpm | SHA-256: a867d4419ff89238a3daa865ed29a8edce43f6c66dad1765da5788591a6da746 |
Red Hat Enterprise Linux for ARM 64 8
| SRPM | |
|---|---|
| python-pyasn1-0.3.7-6.el8_10.2.src.rpm | SHA-256: c857deae380b8fc8c9d4d933e3d1264c307378c283398ad628b69086c10d9233 |
| aarch64 | |
| python3-pyasn1-0.3.7-6.el8_10.2.noarch.rpm | SHA-256: 7a2d2334ba4a8b36f796c3db49c488d33c63e0149454d9995198503f4d34b100 |
| python3-pyasn1-modules-0.3.7-6.el8_10.2.noarch.rpm | SHA-256: a867d4419ff89238a3daa865ed29a8edce43f6c66dad1765da5788591a6da746 |
Red Hat Enterprise Linux for x86_64 - Extended Life Cycle 8.10
| SRPM | |
|---|---|
| python-pyasn1-0.3.7-6.el8_10.2.src.rpm | SHA-256: c857deae380b8fc8c9d4d933e3d1264c307378c283398ad628b69086c10d9233 |
| x86_64 | |
| python3-pyasn1-0.3.7-6.el8_10.2.noarch.rpm | SHA-256: 7a2d2334ba4a8b36f796c3db49c488d33c63e0149454d9995198503f4d34b100 |
| python3-pyasn1-modules-0.3.7-6.el8_10.2.noarch.rpm | SHA-256: a867d4419ff89238a3daa865ed29a8edce43f6c66dad1765da5788591a6da746 |
Red Hat Enterprise Linux for ARM 64 - Extended Life Cycle 8.10
| SRPM | |
|---|---|
| python-pyasn1-0.3.7-6.el8_10.2.src.rpm | SHA-256: c857deae380b8fc8c9d4d933e3d1264c307378c283398ad628b69086c10d9233 |
| aarch64 | |
| python3-pyasn1-0.3.7-6.el8_10.2.noarch.rpm | SHA-256: 7a2d2334ba4a8b36f796c3db49c488d33c63e0149454d9995198503f4d34b100 |
| python3-pyasn1-modules-0.3.7-6.el8_10.2.noarch.rpm | SHA-256: a867d4419ff89238a3daa865ed29a8edce43f6c66dad1765da5788591a6da746 |
Red Hat Enterprise Linux for Power, little endian - Extended Life Cycle 8.10
| SRPM | |
|---|---|
| python-pyasn1-0.3.7-6.el8_10.2.src.rpm | SHA-256: c857deae380b8fc8c9d4d933e3d1264c307378c283398ad628b69086c10d9233 |
| ppc64le | |
| python3-pyasn1-0.3.7-6.el8_10.2.noarch.rpm | SHA-256: 7a2d2334ba4a8b36f796c3db49c488d33c63e0149454d9995198503f4d34b100 |
| python3-pyasn1-modules-0.3.7-6.el8_10.2.noarch.rpm | SHA-256: a867d4419ff89238a3daa865ed29a8edce43f6c66dad1765da5788591a6da746 |
Red Hat Enterprise Linux for IBM z Systems - Extended Life Cycle 8.10
| SRPM | |
|---|---|
| python-pyasn1-0.3.7-6.el8_10.2.src.rpm | SHA-256: c857deae380b8fc8c9d4d933e3d1264c307378c283398ad628b69086c10d9233 |
| s390x | |
| python3-pyasn1-0.3.7-6.el8_10.2.noarch.rpm | SHA-256: 7a2d2334ba4a8b36f796c3db49c488d33c63e0149454d9995198503f4d34b100 |
| python3-pyasn1-modules-0.3.7-6.el8_10.2.noarch.rpm | SHA-256: a867d4419ff89238a3daa865ed29a8edce43f6c66dad1765da5788591a6da746 |
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