CVE-2022-49920

Description

In the Linux kernel, the following vulnerability has been resolved: netfilter: nf_tables: netlink notifier might race to release objects commit release path is invoked via call_rcu and it runs lockless to release the objects after rcu grace period. The netlink notifier handler might win race to remove objects that the transaction context is still referencing from the commit release path. Call rcu_barrier() to ensure pending rcu callbacks run to completion if the list of transactions to be destroyed is not empty.

CVSS Metrics

• v3.1•MEDIUM•Score: 4.7CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:H

EPSS Trends

Current EPSS score: 0.04%• Percentile: 12%

Techniques & Countermeasures

• CWE-362•Concurrent Execution using Shared Resource with Improper Synchronization ('Race Condition')

  The product contains a concurrent code sequence that requires temporary, exclusive access to a shared resource, but a timing window exists in which the shared resource can be modified by another code sequence operating concurrently.

Affected Systems

• linux•linux

  ≥ 6001a930ce0378b62210d4f83583fc88a903d89d, < 1ffe7100411a8b9015115ce124cd6c9c9da6f8e3 | ≥ 6001a930ce0378b62210d4f83583fc88a903d89d, < e40b7c44d19e327ad8b49a491ef1fa8dcc4566e0 | ≥ 6001a930ce0378b62210d4f83583fc88a903d89d, < d4bc8271db21ea9f1c86a1ca4d64999f184d4aae | 5.12

• linux•linux_kernel

  ≥ 5.12, < 5.15.78 | ≥ 5.16, < 6.0.8 | 6.1:rc1 | 6.1:rc2 | 6.1:rc3

References (3)

• https://git.kernel.org/stable/c/1ffe7100411a8b9015115ce124cd6c9c9da6f8e3
• https://git.kernel.org/stable/c/e40b7c44d19e327ad8b49a491ef1fa8dcc4566e0
• https://git.kernel.org/stable/c/d4bc8271db21ea9f1c86a1ca4d64999f184d4aae