Bug 2426247 (CVE-2022-50877)

Summary: CVE-2022-50877 kernel: net: broadcom: bcm4908_enet: update TX stats after actual transmission
Product: [Other] Security Response Reporter: OSIDB Bzimport <bzimport>
Component: vulnerabilityAssignee: Product Security DevOps Team <prodsec-dev>
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OS: Linux   
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Description OSIDB Bzimport 2025-12-30 13:19:11 UTC 
In the Linux kernel, the following vulnerability has been resolved:

net: broadcom: bcm4908_enet: update TX stats after actual transmission

Queueing packets doesn't guarantee their transmission. Update TX stats
after hardware confirms consuming submitted data.

This also fixes a possible race and NULL dereference.
bcm4908_enet_start_xmit() could try to access skb after freeing it in
the bcm4908_enet_poll_tx().
Comment 1 Alexander B 2025-12-30 22:18:45 UTC 
Upstream advisory:
https://lore.kernel.org/linux-cve-announce/2025123023-CVE-2022-50877-6a05@gregkh/T