Use After Free The advisory has been revoked - it doesn't affect any version of package kernel-rt-kvm (opens in a new tab)
Threat Intelligence
The probability is the direct output of the EPSS model, and conveys an overall sense of the threat of exploitation in the wild. The percentile measures the EPSS probability relative to all known EPSS scores. Note: This data is updated daily, relying on the latest available EPSS model version. Check out the EPSS documentation for more details.
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Test your applications- Snyk IDSNYK-RHEL9-KERNELRTKVM-7089376
- published24 May 2024
- disclosed21 May 2024
Introduced: 21 May 2024
CVE-2021-47239 (opens in a new tab)Amendment
The Red Hat security team deemed this advisory irrelevant for RHEL:9.
NVD Description
Note: Versions mentioned in the description apply only to the upstream kernel-rt-kvm package and not the kernel-rt-kvm package as distributed by RHEL.
In the Linux kernel, the following vulnerability has been resolved:
net: usb: fix possible use-after-free in smsc75xx_bind
The commit 46a8b29c6306 ("net: usb: fix memory leak in smsc75xx_bind") fails to clean up the work scheduled in smsc75xx_reset-> smsc75xx_set_multicast, which leads to use-after-free if the work is scheduled to start after the deallocation. In addition, this patch also removes a dangling pointer - dev->data[0].
This patch calls cancel_work_sync to cancel the scheduled work and set the dangling pointer to NULL.
References
- https://access.redhat.com/security/cve/CVE-2021-47239
- https://git.kernel.org/stable/c/14616c372a7be01a2fb8c56c9d8debd232b9e43d
- https://git.kernel.org/stable/c/2fc8300c9cfa5167fcb5b1a2a07db6f53e82f59b
- https://git.kernel.org/stable/c/4252bf6c2b245f47011098113d405ffad6ad5d5b
- https://git.kernel.org/stable/c/56b786d86694e079d8aad9b314e015cd4ac02a3d
- https://git.kernel.org/stable/c/570a52cf3e01d19f7fd1a251dfc52b0cd86c13cb
- https://git.kernel.org/stable/c/64160d1741a3de5204d1a822e058e0b4cc526504
- https://git.kernel.org/stable/c/7cc8b2e05fcea6edd022d26e82091d781af8fd9b
- https://git.kernel.org/stable/c/c4e3be2e7742863e454ce31faf8fd0109c00050b