Red Hat Security Advisory: Red Hat Hardened Images RPMs Security Update
Affects Red HatSource GCVE Database
Not known to be exploited · CVSS 2.1 Low · fixed in Red Hat package updates : update Red Hat CPython when convenient.
Data as of 30 Oct 2026, 11:52 UTC
- EPSS
- 0.5% chance of exploitation in 30 days – higher than 44% of CVEsExploit Prediction Scoring System: the likelihood attackers will use this flaw soon.
- Patch
- Available – fixed in 3.15.0rc2, 3.14.8, 3.13.16 +3
CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:A/VC:N/VI:N/VA:L/SC:N/SI:N/SA:NExploitation evidence
Disclosed: evidence found.
CVE published 25 Aug 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 30 Oct 2026.
What to do
Upgrade to a fixed release listed under Affected software.
Affected software
| Product | Affected | Fixed in |
|---|---|---|
| Python Software FoundationCPython | Affected
| Fixed in
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| Python Software FoundationCPython | Affected
| Fixed in
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| Python Software FoundationCPython | Affected
| Fixed in
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| Python Software FoundationCPython | Affected
| Fixed in
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| Python Software FoundationCPython | Affected
| Fixed in
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| Python Software FoundationCPython | Affected
| Fixed in
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Check your own hosts for these packages with threat-finder (opens in a new tab), our free open-source scanner.
AI-suggested
A fixed version of the Python 3.11 packages is available in Red Hat Hardened Images as python3.11-3.11.16-1.2.hum1 and related RPMs. Users should apply this update to remediate the vulnerabilities. Since the vulnerability requires parsing untrusted archives, avoiding processing untrusted compressed files also mitigates risk. Red Hat provides official fixes; applying these updates is the recommended remediation.
Description
A security update for Red Hat Hardened Images includes fixes for multiple vulnerabilities in Python 3.11, notably CVE-2026-15310. This flaw involves Python pre-allocating memory based on attacker-controlled sizes when decompressing specially crafted zip files using bzip, LZMA, or Zstandard compression. This can lead to excessive memory consumption and potential denial of service (DoS) at the process level. Exploitation requires an application or user to parse untrusted, malicious archives, limiting the impact. Red Hat notes that typical environments do not automatically process such files, reducing operational risk. The update provides patched RPMs for Python 3.11 packages on aarch64 and x86_64 architectures.
References
- access.redhat.com/errata/RHSA-2026:65525 (opens in a new tab)
- access.redhat.com/security/cve/CVE-2026-15310 (opens in a new tab)
- access.redhat.com/security/cve/CVE-2026-15806 (opens in a new tab)
- access.redhat.com/security/cve/CVE-2026-17084 (opens in a new tab)
- access.redhat.com/security/cve/CVE-2026-19672 (opens in a new tab)
- access.redhat.com/security/updates/classification/ (opens in a new tab)
- images.redhat.com (opens in a new tab)
- security.access.redhat.com/data/csaf/v2/advisories/2026/rhsa-2026_65525.json (opens in a new tab)