CVE-2021-47294 (GCVE-0-2021-47294)
Vulnerability from cvelistv5
Published
2024-05-21 14:35
Modified
2026-05-23 15:19
Severity ?
Summary
In the Linux kernel, the following vulnerability has been resolved: netrom: Decrease sock refcount when sock timers expire Commit 63346650c1a9 ("netrom: switch to sock timer API") switched to use sock timer API. It replaces mod_timer() by sk_reset_timer(), and del_timer() by sk_stop_timer(). Function sk_reset_timer() will increase the refcount of sock if it is called on an inactive timer, hence, in case the timer expires, we need to decrease the refcount ourselves in the handler, otherwise, the sock refcount will be unbalanced and the sock will never be freed.
References
Impacted products
Vendor Product Version
Linux Linux Version: ce29e8a259de767f7210d346ad2b031cb8ab2732
Version: baa9e32336bf6d0d74a7c3486d2a27feaf57cd5f
Version: 0adf571fa34b27bd0b97b408cc0f0dc54b72f0eb
Version: 2c6b572458a9127e8070df13fa7f115c29ab1d92
Version: 63346650c1a94a92be61a57416ac88c0a47c4327
Version: 63346650c1a94a92be61a57416ac88c0a47c4327
Version: 63346650c1a94a92be61a57416ac88c0a47c4327
Version: 63346650c1a94a92be61a57416ac88c0a47c4327
Version: f1d9a1f2ef6ff17293d21d5e6b80e04bea0cf508
Version: 519e8a22a454b1f1baa3a151b184fe51bc18e178
Version: 4.4.173   ≤
Version: 4.9.155   ≤
Version: 4.14.98   ≤
Version: 4.19.20   ≤
Version: 3.18.134   ≤
Version: 4.20.7   ≤
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