Red Hat Security Advisory: Red Hat Hardened Images RPMs bug fix and enhancement update
Affects Red HatSource GCVE Database
Not known to be exploited · CVSS 5.9 Medium : upgrade Red Hat CPython to 3.15.0a6 when convenient.
Data as of 29 Oct 2026, 18:38 UTC
- EPSS
- 0.3% chance of exploitation in 30 days – higher than 31% of CVEsExploit Prediction Scoring System: the likelihood attackers will use this flaw soon.
- Patch
- Available – fixed in 3.15.0a6
CVSS:4.0/AV:N/AC:L/AT:P/PR:H/UI:N/VC:L/VI:H/VA:N/SC:N/SI:N/SA:NExploitation evidence
Disclosed: evidence found.
CVE published 20 Jan 2026
Detectable: no evidence on record.
No public nuclei template indexed
Weaponized: no evidence on record.
No public exploit code indexed in Metasploit or Exploit-DB
Exploited in the wildExploited: no evidence on record.
Not in CISA KEV and no source reports exploitation
Observed by OffSeq MirageSeen by Mirage: no evidence on record.
No attack traffic recorded by OffSeq Mirage sensors
A missing step is not evidence of safety. Sources: cve.org (opens in a new tab), the Metasploit, Exploit-DB and nuclei-templates index as of 29 Oct 2026.
What to do
Upgrade CPython to 3.15.0a6.
Affected software
| Product | Affected | Fixed in |
|---|---|---|
| Python Software FoundationCPython | Affected
| Fixed in
|
GitHubCPythonpkg:github/CPythonOther threats | Affected
| Fixed in
|
Check your own hosts for these packages with threat-finder (opens in a new tab), our free open-source scanner.
AI-suggested
Red Hat has released updated python3.14 RPM packages as part of Red Hat Hardened Images to address this vulnerability. Users should apply these updates to remediate the issue. Additionally, ensure that no data passed to the poplib module contains newline or carriage return characters to mitigate the vulnerability. Since a fix is available, applying the official update is the recommended remediation.
Description
This update includes the following RPMs: python3.14: * python-unversioned-command-3.14.3-2.hum1 (noarch) * python3-3.14.3-2.hum1 (aarch64, x86_64) * python3-debug-3.14.3-2.hum1 (aarch64, x86_64) * python3-devel-3.14.3-2.hum1 (aarch64, x86_64) * python3-idle-3.14.3-2.hum1 (aarch64, x86_64) * python3-libs-3.14.3-2.hum1 (aarch64, x86_64) * python3-test-3.14.3-2.hum1 (aarch64, x86_64) * python3-tkinter-3.14.3-2.hum1 (aarch64, x86_64) * python3.14-freethreading-3.14.3-2.hum1 (aarch64, x86_64) * python3.14-freethreading-debug-3.14.3-2.hum1 (aarch64, x86_64) * python3.14-freethreading-devel-3.14.3-2.hum1 (aarch64, x86_64) * python3.14-freethreading-idle-3.14.3-2.hum1 (aarch64, x86_64) * python3.14-freethreading-libs-3.14.3-2.hum1 (aarch64, x86_64) * python3.14-freethreading-test-3.14.3-2.hum1 (aarch64, x86_64) * python3.14-freethreading-tkinter-3.14.3-2.hum1 (aarch64, x86_64) * python3.14-3.14.3-2.hum1.src (source)
References
- access.redhat.com/errata/RHSA-2026:5994 (opens in a new tab)
- images.redhat.com (opens in a new tab)
- access.redhat.com/security/cve/CVE-2025-15367 (opens in a new tab)
- access.redhat.com/security/updates/classification/ (opens in a new tab)
- security.access.redhat.com/data/csaf/v2/advisories/2026/rhsa-2026_5994.json (opens in a new tab)
- ubuntu.com/security/CVE-2025-15367 (opens in a new tab)
- cve.org/CVERecord?id=CVE-2025-15367 (opens in a new tab)
- github.com/python/cpython/commit/b234a2b67539f787e191d2ef19a7cbdce32874e7 (opens in a new tab)
- github.com/python/cpython/issues/143923 (opens in a new tab)
- github.com/python/cpython/pull/143924 (opens in a new tab)
- mail.python.org/archives/list/security-announce@python.org/thread/CBFBOWVGGUJFSGITQCCBZS4GEYYZ7ZNE/ (opens in a new tab)
- ubuntu.com/security/notices/USN-8018-1 (opens in a new tab)
- ubuntu.com/security/notices/USN-8018-2 (opens in a new tab)
- bugs.launchpad.net/bugs/2143706 (opens in a new tab)