Use After Free Affecting kernel-rt-debug-kvm package, versions *
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Test your applications- Snyk ID SNYK-CENTOS7-KERNELRTDEBUGKVM-6326529
- published 29 Feb 2024
- disclosed 27 Feb 2024
Introduced: 27 Feb 2024
CVE-2021-46973 Open this link in a new tabHow to fix?
There is no fixed version for Centos:7 kernel-rt-debug-kvm.
NVD Description
Note: Versions mentioned in the description apply only to the upstream kernel-rt-debug-kvm package and not the kernel-rt-debug-kvm package as distributed by Centos.
See How to fix? for Centos:7 relevant fixed versions and status.
In the Linux kernel, the following vulnerability has been resolved:
net: qrtr: Avoid potential use after free in MHI send
It is possible that the MHI ul_callback will be invoked immediately following the queueing of the skb for transmission, leading to the callback decrementing the refcount of the associated sk and freeing the skb.
As such the dereference of skb and the increment of the sk refcount must happen before the skb is queued, to avoid the skb to be used after free and potentially the sk to drop its last refcount..
References
- https://access.redhat.com/security/cve/CVE-2021-46973
- https://git.kernel.org/stable/c/03c649dee8b1eb5600212a249542a70f47a5ab40
- https://git.kernel.org/stable/c/47a017f33943278570c072bc71681809b2567b3a
- https://git.kernel.org/stable/c/48ec949ac979b4b42d740f67b6177797af834f80
- https://git.kernel.org/stable/c/ea474054c2cc6e1284604b21361f475c7cc8c0a0