CVE-2022-50212

HIGH EPSS 8.6%
Published Jun 18, 20251y ago · Modified Jun 17, 20261w ago
7.8 CVSS 3.1
High
Find Similar
Published Jun 18, 2025 1y ago
Last Modified Jun 17, 2026 1w ago

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 Details

Base Score
7.8
Exploitability
1.8
Impact
5.9
Vector string
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Attack Vector Local
Attack Complexity Low
Privileges Required Low
User Interaction None
Scope Unchanged
Confidentiality High
Integrity High
Availability High

Threat Intelligence

EPSS Exploit Probability
8.6% percentile
Exploit & Patch Status
No Known Exploit
Patch Available

Weaknesses 1

CWE-416 Use After Free Memory Safety

Affected Products 4

VendorProductVersionRange
linuxlinux_kernel*≥5.9  –  <5.10.137
linuxlinux_kernel*≥5.11  –  <5.15.61
linuxlinux_kernel*≥5.16  –  <5.18.18
linuxlinux_kernel*≥5.19  –  <5.19.2

References 5

  • git.kernel.org https://git.kernel.org/stable/c/0f49613a213d918af790c1276f79da741968de11
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/58e863f64ee3d0879297e5e53b646e4b91e59620
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/91501513016903077f91033fa5d2aa26cac399b2
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/95f466d22364a33d183509629d0879885b4f547e
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/9e7dcb88ec8e85e4a8ad0ea494ea2f90f32d2583
    Patch

Remediation

  • git.kernel.org https://git.kernel.org/stable/c/0f49613a213d918af790c1276f79da741968de11
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/58e863f64ee3d0879297e5e53b646e4b91e59620
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/91501513016903077f91033fa5d2aa26cac399b2
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/95f466d22364a33d183509629d0879885b4f547e
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/9e7dcb88ec8e85e4a8ad0ea494ea2f90f32d2583
    Patch