Skip to main content
CVE-2026-15310VulnerabilityPublished Updated

Red Hat Security Advisory: Red Hat Hardened Images RPMs Security Update

Affects Red HatSource GCVE Database

0
Compare
Authoritative record:CVE-2026-15310· Low 2.1

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

CVSS 4.0 base score
2.1Low
How severe the flaw is on the 0–10 CVSS scale.
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:N

Exploitation evidence

  1. Disclosed: evidence found.

    CVE published 25 Aug 2026

  2. Detectable: no evidence on record.

    No public nuclei template indexed

  3. Weaponized: no evidence on record.

    No public exploit code indexed in Metasploit or Exploit-DB

  4. Exploited in the wild: no evidence on record.

    Not in CISA KEV and no source reports exploitation

  5. Observed by OffSeq 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

ProductAffectedFixed in
Python Software FoundationCPythonAffected
  • >=3.15.0a1 <3.15.0rc2
Fixed in
  • 3.15.0rc2
Python Software FoundationCPythonAffected
  • >=3.14.0 <3.14.8
Fixed in
  • 3.14.8
Python Software FoundationCPythonAffected
  • >=3.13.0 <3.13.16
Fixed in
  • 3.13.16
Python Software FoundationCPythonAffected
  • >=3.12.0 <3.12.15
Fixed in
  • 3.12.15
Python Software FoundationCPythonAffected
  • >=3.11.0 <3.11.17
Fixed in
  • 3.11.17
Python Software FoundationCPythonAffected
  • <3.10.22
Fixed in
  • 3.10.22

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

Community reviews

Loading reviews…