netfilter: nf_tables: fix use-after-free in nf_tables_addchain()
CVE-2026-23231
Scope
What the vendor says is affected
- cbl2 python3 3.9.19-19 on CBL Mariner 2.0
- azl3 python3 3.12.9-9 on Azure Linux 3.0
- azl3 python3 3.12.9-10 on Azure Linux 3.0
- cbl2 python3 3.9.19-19
- azl3 python3 3.12.9-11 on Azure Linux 3.0
- azl3 python3 3.12.9-13 on Azure Linux 3.0
- azl3 python3 3.12.9-14 on Azure Linux 3.0
- cbl2 python3 3.9.19-19 on CBL-Mariner 2.0
Versions the vendor lists as fixed
- 3.12.9-14
Next step
What the vendor recommends
CBL-Mariner Releases Release Notes
Review the complete instructions on the vendor's siteUpdate history
What changed in later vendor updates
SecurityAlert records field-level changes from the point we begin following a bulletin. Earlier vendor changes may not have a field-by-field record.
- Added affected products: cbl2 python3 3.9.19-19 on CBL-Mariner 2.0.
- The vendor changed its remediation guidance.
Timeline
When this advisory changed
- Published by Microsoft Security Response Center
The publication date reported by the vendor.
- Added to SecurityAlert
We collected the advisory from the official source.
- Updated by Microsoft Security Response Center
The vendor changed the advisory after it was first published.
- Confirmed at the source
Our collector saw this advisory during a later source check.
Vulnerabilities