Bug 2363293 (CVE-2025-37757)

Summary: CVE-2025-37757 kernel: tipc: fix memory leak in tipc_link_xmit
Product: [Other] Security Response Reporter: OSIDB Bzimport <bzimport>
Component: vulnerabilityAssignee: Product Security DevOps Team <prodsec-dev>
Status: NEW --- QA Contact:
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Priority: medium    
Version: unspecifiedCC: dfreiber, drow, jburrell, vkumar
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Hardware: All   
OS: Linux   
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Description OSIDB Bzimport 2025-05-01 14:02:34 UTC 
In the Linux kernel, the following vulnerability has been resolved:

tipc: fix memory leak in tipc_link_xmit

In case the backlog transmit queue for system-importance messages is overloaded,
tipc_link_xmit() returns -ENOBUFS but the skb list is not purged. This leads to
memory leak and failure when a skb is allocated.

This commit fixes this issue by purging the skb list before tipc_link_xmit()
returns.
Comment 1 Avinash Hanwate 2025-05-02 04:29:51 UTC 
Upstream advisory:
https://lore.kernel.org/linux-cve-announce/2025050139-CVE-2025-37757-8a5e@gregkh/T