Not yet scoredPublished Dec 30, 2025

CVE-2022-50838net: stream: purge sk_error_queue in sk_stream_kill_queues()

Updated under an hour ago (Oct 27, 2026, 12:30 AM ET)

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Exploited in the last 30 days

In the Linux kernel, the following vulnerability has been resolved: net: stream: purge sk_error_queue in sk_stream_kill_queues() Changheon Lee reported TCP socket leaks, with a nice repro. It seems we leak TCP sockets with the following sequence: 1) SOF_TIMESTAMPING_TX_ACK is enabled on the socket. Each ACK will cook an skb put in error queue, from __skb_tstamp_tx(). __skb_tstamp_tx() is using skb_clone(), unless SOF_TIMESTAMPING_OPT_TSONLY was also requested. 2) If the application is also using MSG_ZEROCOPY, then we put in the error queue cloned skbs that had a struct ubuf_info attached to them. Whenever an struct ubuf_info is allocated, sock_zerocopy_alloc() does a sock_hold(). As long as the cloned skbs are still in sk_error_queue, socket refcount is kept elevated. 3) Application closes the socket, while error queue is not empty. Since tcp_close() no longer purges the socket error queue, we might end up with a TCP socket with at least one skb in error queue keeping the socket alive forever. This bug can be (ab)used to consume all kernel memory and freeze the host. We need to purge the error queue, with proper synchronization against concurrent writers.

CVSS: Not yet scored
Weakness (CWE): Not given
Known exploited: Not in CISA's KEV catalog
EPSS (exploitation in the next 30 days): Not loaded for this CVE
Assigned by: Linux
NVD analysis: Deferred
Record last updated: May 23, 2026
First seen by InfoSec Signals: Oct 9, 2026

Affected products

Affected products

Linux Linux linux:linux (from the name)	from 7737b104c211fa843de268b897d601e070292a72 before c8c1eec578a9ae2dc8f14a1846942a0b7bf29d1d; from 89be5c357de34718eaaaefed80737f432c5ab86f before bab542cf56fc174c8447c00b73be99ffd66d2d39; 8b8b3d738e450d2c2ccdc75f0ab5a951746c2a96 builds before 6f00bd0402a1e3d2d556afba57c045bd7931e4d3; from b631c603b5fb98d2bd709c35d384901965a3dd51 before 4f1d37ff4226eb99d6b69e9f4518e279e1a851bf; from daf15fa1fd997749e881aedd9f03f73a11240e82 before 9062493811676ee0efe6c74d98f00ca38c4e17d4; 3988164fe9ddf98ebf5b5cdede91ac38c5f08a7e builds before 9da204cd67c4fe97e8aa465d10d5c2e7076f7f42; 24bcbe1cc69fa52dc4f7b5b2456678ed464724d8 builds before 8c330c36b3970d0917f48827fa6c7a9c75aa4602; from 24bcbe1cc69fa52dc4f7b5b2456678ed464724d8 before b458d349f8753f666233828ebd30df6f100cf7d5; and 11 more ranges	CNA record

References

References

https://git.kernel.org/stable/c/c8c1eec578a9ae2dc8f14a1846942a0b7bf29d1d
https://git.kernel.org/stable/c/bab542cf56fc174c8447c00b73be99ffd66d2d39
https://git.kernel.org/stable/c/6f00bd0402a1e3d2d556afba57c045bd7931e4d3
https://git.kernel.org/stable/c/4f1d37ff4226eb99d6b69e9f4518e279e1a851bf
https://git.kernel.org/stable/c/9062493811676ee0efe6c74d98f00ca38c4e17d4
https://git.kernel.org/stable/c/9da204cd67c4fe97e8aa465d10d5c2e7076f7f42
https://git.kernel.org/stable/c/8c330c36b3970d0917f48827fa6c7a9c75aa4602
https://git.kernel.org/stable/c/b458d349f8753f666233828ebd30df6f100cf7d5
https://git.kernel.org/stable/c/e0c8bccd40fc1c19e1d246c39bcf79e357e1ada3

The CVE record on cve.org NVD's entry

The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.