Allocation of Resources Without Limits or Throttling The advisory has been revoked - it doesn't affect any version of package python3 (opens in a new tab)
Threat Intelligence
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The probability is the direct output of the EPSS model, and conveys an overall sense of the threat of exploitation in the wild. The percentile measures the EPSS probability relative to all known EPSS scores. Note: This data is updated daily, relying on the latest available EPSS model version. Check out the EPSS documentation for more details.
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Test your applications- Snyk IDSNYK-RHEL10-PYTHON3-11438141
- published5 Aug 2025
- disclosed6 Dec 2024
Introduced: 6 Dec 2024
CVE-2024-12254 (opens in a new tab)Amendment
The Red Hat security team deemed this advisory irrelevant for RHEL:10.
NVD Description
Note: Versions mentioned in the description apply only to the upstream python3 package and not the python3 package as distributed by RHEL.
Starting in Python 3.12.0, the asyncio._SelectorSocketTransport.writelines() method would not "pause" writing and signal to the Protocol to drain the buffer to the wire once the write buffer reached the "high-water mark". Because of this, Protocols would not periodically drain the write buffer potentially leading to memory exhaustion.
This vulnerability likely impacts a small number of users, you must be using Python 3.12.0 or later, on macOS or Linux, using the asyncio module with protocols, and using .writelines() method which had new zero-copy-on-write behavior in Python 3.12.0 and later. If not all of these factors are true then your usage of Python is unaffected.
References
- https://bugzilla.redhat.com/show_bug.cgi?id=2330804
- https://access.redhat.com/security/cve/CVE-2024-12254
- https://access.redhat.com/errata/RHBA-2025:6294
- https://github.com/python/cpython/commit/71e8429ac8e2adc10084ab5ec29a62f4b6671a82
- https://github.com/python/cpython/commit/9aa0deb2eef2655a1029ba228527b152353135b5
- https://github.com/python/cpython/issues/127655
- https://github.com/python/cpython/pull/127656
- https://mail.python.org/archives/list/security-announce@python.org/thread/H4O3UBAOAQQXGT4RE3E4XQYR5XLROORB/
- http://www.openwall.com/lists/oss-security/2024/12/06/1
- https://github.com/python/cpython/commit/e991ac8f2037d78140e417cc9a9486223eb3e786
- https://security.netapp.com/advisory/ntap-20250404-0010/