Resource Leak Affecting kernel-rt-debug package, versions *
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Test your applications- Snyk ID SNYK-RHEL7-KERNELRTDEBUG-6329927
- published 29 Feb 2024
- disclosed 28 Feb 2024
Introduced: 28 Feb 2024
CVE-2021-47024 Open this link in a new tabHow to fix?
There is no fixed version for RHEL:7 kernel-rt-debug.
NVD Description
Note: Versions mentioned in the description apply only to the upstream kernel-rt-debug package and not the kernel-rt-debug package as distributed by RHEL.
See How to fix? for RHEL:7 relevant fixed versions and status.
In the Linux kernel, the following vulnerability has been resolved:
vsock/virtio: free queued packets when closing socket
As reported by syzbot [1], there is a memory leak while closing the socket. We partially solved this issue with commit ac03046ece2b ("vsock/virtio: free packets during the socket release"), but we forgot to drain the RX queue when the socket is definitely closed by the scheduled work.
To avoid future issues, let's use the new virtio_transport_remove_sock() to drain the RX queue before removing the socket from the af_vsock lists calling vsock_remove_sock().
[1] https://syzkaller.appspot.com/bug?extid=24452624fc4c571eedd9
References
- https://access.redhat.com/security/cve/CVE-2021-47024
- https://git.kernel.org/stable/c/27691665145e74a45034a9dccf1150cf1894763a
- https://git.kernel.org/stable/c/37c38674ef2f8d7e8629e5d433c37d6c1273d16b
- https://git.kernel.org/stable/c/8432b8114957235f42e070a16118a7f750de9d39
- https://git.kernel.org/stable/c/b605673b523fe33abeafb2136759bcbc9c1e6ebf