CVE-2022-49456
Description
A vulnerability was found in the Linux kernel's bonding driver, which aggregates multiple network interfaces into a single logical interface for redundancy or increased throughput. The issue arises from a missing Read-Copy-Update (RCU) lock in the bond_ethtool_get_ts_info() function. This function can be invoked via the setsockopt system call without holding the necessary RCU lock, leading to potential race conditions and memory corruption when accessing bonding driver data structures.
Statement
The vulnerability was introduced after a previous change that removed the RCU lock from the function, not accounting for the fact that it could be called without the appropriate synchronization. This oversight could allow attackers with local access to exploit the race condition, potentially causing system instability or other unintended behaviors.
Common Vulnerability Scoring System (CVSS) Score Details
Info alert:Important note
CVSS scores for open source components depend on vendor-specific factors (e.g. version or build chain). Therefore, Red Hat's score and impact rating can be different from NVD and other vendors. Red Hat remains the authoritative CVE Naming Authority (CNA) source for its products and services (see Red Hat classifications).
The following CVSS metrics and score provided are preliminary and subject to review.
CVSS v3 Score Breakdown
| Red Hat | NVD | cve.org | |
|---|---|---|---|
| Base Score | 5.5 | 5.5 | 7.8 |
| Attack Vector | Local | Local | Local |
| Attack Complexity | Low | Low | Low |
| Privileges Required | Low | Low | Low |
| User Interaction | None | None | None |
| Scope | Unchanged | Unchanged | Unchanged |
| Confidentiality | None | None | High |
| Integrity Impact | None | None | High |
| Availability Impact | High | High | High |
Vector
Red Hat: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
NVD: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
cve.org: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
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