CVE-2023-53716
Published Oct 22, 2025
Modified Apr 15, 2026
Description
In the Linux kernel, the following vulnerability has been resolved: net: fix skb leak in __skb_tstamp_tx() Commit 50749f2dd685 ("tcp/udp: Fix memleaks of sk and zerocopy skbs with TX timestamp.") added a call to skb_orphan_frags_rx() to fix leaks with zerocopy skbs. But it ended up adding a leak of its own. When skb_orphan_frags_rx() fails, the function just returns, leaking the skb it just cloned. Free it before returning. This bug was discovered and resolved using Coverity Static Analysis Security Testing (SAST) by Synopsys, Inc.
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References
Other References
https://git.kernel.org/stable/c/58766252f6b2c0487cda6976a53d2bb03ae28e2a
https://git.kernel.org/stable/c/779332447108545ef04682ea29af5f85c0202aee
https://git.kernel.org/stable/c/82501f1ead557cbee1c2467654ec109a80334d22
https://git.kernel.org/stable/c/8a02fb71d7192ff1a9a47c9d937624966c6e09af
https://git.kernel.org/stable/c/a594382ec6d0cc8cff5a8bc7e61b54e3858fb243
https://git.kernel.org/stable/c/cc18b4685910d5d9de8314bae9c55790701b1811
https://git.kernel.org/stable/c/e06841a2abf9c82735cee39e88b1d79464088840
https://git.kernel.org/stable/c/f4d928c00254cfc9dd0ee7076f4a59bceec675f4
Frequently Asked Questions
What is CVE-2023-53716? +
In the Linux kernel, the following vulnerability has been resolved:
net: fix skb leak in __skb_tstamp_tx()
Commit 50749f2dd685 ("tcp/udp: Fix memleaks of sk and zerocopy skbs with
TX timestamp.") added a call to skb_orphan_frags_rx() to fix leaks with
zerocopy skbs. But it ended up adding a leak of its own. When
skb_orphan_frags_rx() fails, the function just returns, leaking the skb
it just cloned. Free it before returning.
This bug was discovered and resolved using Coverity Static Analysis
Security Testing (SAST) by Synopsys, Inc.
How do I check if I'm vulnerable to CVE-2023-53716? +
You can use Secably's free Website Scanner to check your website for known vulnerabilities. For infrastructure scanning, use the Port Scanner to identify exposed services that may be affected. Check the vendor advisories linked above for specific patch and version information.