CVE-2022-50676
Unknown Unknown - Not Provided

BaseFortify

Publication date: 2025-12-09

Last updated on: 2025-12-09

Assigner: kernel.org

Description
In the Linux kernel, the following vulnerability has been resolved: net: rds: don't hold sock lock when cancelling work from rds_tcp_reset_callbacks() syzbot is reporting lockdep warning at rds_tcp_reset_callbacks() [1], for commit ac3615e7f3cffe2a ("RDS: TCP: Reduce code duplication in rds_tcp_reset_callbacks()") added cancel_delayed_work_sync() into a section protected by lock_sock() without realizing that rds_send_xmit() might call lock_sock(). We don't need to protect cancel_delayed_work_sync() using lock_sock(), for even if rds_{send,recv}_worker() re-queued this work while __flush_work() from cancel_delayed_work_sync() was waiting for this work to complete, retried rds_{send,recv}_worker() is no-op due to the absence of RDS_CONN_UP bit.

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Meta Information

Published
2025-12-09
Last Modified
2025-12-09
Generated
2026-07-06
AI Q&A
2025-12-09
EPSS Evaluated
2026-07-05
NVD
CVE-2022-50676
EUVD
EUVD-2022-55729

Affected Vendors & Products

Showing 1 associated CPE
Vendor Product Version / Range
linux linux_kernel *

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Exploitability

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CWE ID Description
CWE-UNKNOWN

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Executive Summary

This vulnerability involves the Linux kernel's RDS (Reliable Datagram Sockets) TCP code where a lock (sock lock) was held incorrectly when cancelling delayed work in the function rds_tcp_reset_callbacks(). The issue arose because cancel_delayed_work_sync() was called within a section protected by lock_sock(), but rds_send_xmit() might also call lock_sock(), leading to potential lockdep warnings and improper locking behavior. The fix was to remove the unnecessary lock_sock() protection around cancel_delayed_work_sync() to avoid these locking conflicts.

Impact Analysis

The vulnerability could lead to locking issues in the Linux kernel's RDS TCP code, potentially causing deadlocks or other synchronization problems. This could affect the stability and reliability of network communications using RDS, possibly leading to system hangs or degraded performance.

Mitigation Strategies

Update the Linux kernel to a version that includes the fix for this vulnerability, specifically the commit ac3615e7f3cffe2a which removes the improper use of lock_sock() around cancel_delayed_work_sync() in rds_tcp_reset_callbacks().

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