Vulnerability Description
In the Linux kernel, the following vulnerability has been resolved: netfilter: nf_tables: do not allow CHAIN_ID to refer to another table When doing lookups for chains on the same batch by using its ID, a chain from a different table can be used. If a rule is added to a table but refers to a chain in a different table, it will be linked to the chain in table2, but would have expressions referring to objects in table1. Then, when table1 is removed, the rule will not be removed as its linked to a chain in table2. When expressions in the rule are processed or removed, that will lead to a use-after-free. When looking for chains by ID, use the table that was used for the lookup by name, and only return chains belonging to that same table.
CVSS Score
HIGH
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Linux | Linux Kernel | >= 5.9, < 5.10.137 |
Related Weaknesses (CWE)
References
- https://git.kernel.org/stable/c/0f49613a213d918af790c1276f79da741968de11Patch
- https://git.kernel.org/stable/c/58e863f64ee3d0879297e5e53b646e4b91e59620Patch
- https://git.kernel.org/stable/c/91501513016903077f91033fa5d2aa26cac399b2Patch
- https://git.kernel.org/stable/c/95f466d22364a33d183509629d0879885b4f547ePatch
- https://git.kernel.org/stable/c/9e7dcb88ec8e85e4a8ad0ea494ea2f90f32d2583Patch
FAQ
What is CVE-2022-50212?
CVE-2022-50212 is a vulnerability with a CVSS score of 7.8 (HIGH). In the Linux kernel, the following vulnerability has been resolved: netfilter: nf_tables: do not allow CHAIN_ID to refer to another table When doing lookups for chains on the same batch by using its...
How severe is CVE-2022-50212?
CVE-2022-50212 has been rated HIGH with a CVSS base score of 7.8/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2022-50212?
Check the references section above for vendor advisories and patch information. Affected products include: Linux Linux Kernel.