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CVE-2024-0397
Memory race condition in ssl.SSLContext certificate store methods
High7.4EPSS 0.81%
- Published
- Updated
- Reserved
- Assigned by
- PSF
Description
A defect was discovered in the Python “ssl” module where there is a memory race condition with the ssl.SSLContext methods “cert_store_stats()” and “get_ca_certs()”. The race condition can be triggered if the methods are called at the same time as certificates are loaded into the SSLContext, such as during the TLS handshake with a certificate directory configured. This issue is fixed in CPython 3.10.14, 3.11.9, 3.12.3, and 3.13.0a5.
Scores
| Scored by | CVSS | Score | Vector |
|---|---|---|---|
| CISA-ADPADP (enrichment) | 3.1 | High7.4 | CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:H |
| NVDNVD · Deferred | 3.1 | High7.4 | CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:H |
- EPSS (exploitation in 30 days)
- 0.81% · top 43% of all CVEs (6 Nov 2026)
- CISA SSVC
- Exploitation: none · Automatable: no · Technical impact: total
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The list uses the assigner's score when there is one, then CISA's, then NVD's: High 7.4.
Weakness
Affected products
Python Software Foundation · CPython
- affected < 3.8.20
- affected 3.9.0 – < 3.9.20
- affected 3.10.0 – < 3.10.14
- affected 3.11.0 – < 3.11.9
- affected 3.12.0 – < 3.12.3
- affected 3.13.0a1 – < 3.13.0a5
References (12)
- https://github.com/python/cpython/issues/114572 (opens in a new tab)issue-trackingx_transferred
- https://github.com/python/cpython/pull/114573 (opens in a new tab)patchx_transferred
- https://mail.python.org/archives/list/[email protected]/thread/BMAK5BCGKYWNJOACVUSLUF6SFGBIM4VP/ (opens in a new tab)vendor-advisoryx_transferred
- https://github.com/python/cpython/commit/01c37f1d0714f5822d34063ca7180b595abf589d (opens in a new tab)patchx_transferred
- https://github.com/python/cpython/commit/29c97287d205bf2f410f4895ebce3f43b5160524 (opens in a new tab)patchx_transferred
- https://github.com/python/cpython/commit/37324b421b72b7bc9934e27aba85d48d4773002e (opens in a new tab)patchx_transferred
- https://github.com/python/cpython/commit/542f3272f56f31ed04e74c40635a913fbc12d286 (opens in a new tab)patchx_transferred
- https://github.com/python/cpython/commit/b228655c227b2ca298a8ffac44d14ce3d22f6faa (opens in a new tab)patchx_transferred
- https://github.com/python/cpython/commit/bce693111bff906ccf9281c22371331aaff766ab (opens in a new tab)patchx_transferred
- http://www.openwall.com/lists/oss-security/2024/06/17/2 (opens in a new tab)x_transferred
- https://security.netapp.com/advisory/ntap-20250411-0006/ (opens in a new tab)
- https://lists.debian.org/debian-lts-announce/2024/12/msg00000.html (opens in a new tab)
Sources
The same CVE in the primary databases and aggregators, to check against.
- CVE.org record (opens in a new tab)
- CVE List JSON (GitHub) (opens in a new tab)
- NVD (opens in a new tab)
- FIRST EPSS (opens in a new tab)
- OSV.dev (opens in a new tab)
- GitHub Advisories (opens in a new tab)
- CIRCL Vulnerability-Lookup (opens in a new tab)
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[](https://trackcve.app/cve/CVE-2024-0397)Record last updated .