CVE-2022-49501 The advisory has been revoked - it doesn't affect any version of package rtla (opens in a new tab)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-RTLA-9111679
- published5 Mar 2025
- disclosed26 Feb 2025
Introduced: 26 Feb 2025
CVE-2022-49501 (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 rtla package and not the rtla package as distributed by RHEL.
In the Linux kernel, the following vulnerability has been resolved:
usbnet: Run unregister_netdev() before unbind() again
Commit 2c9d6c2b871d ("usbnet: run unbind() before unregister_netdev()") sought to fix a use-after-free on disconnect of USB Ethernet adapters.
It turns out that a different fix is necessary to address the issue: https://lore.kernel.org/netdev/18b3541e5372bc9b9fc733d422f4e698c089077c.1650177997.git.lukas@wunner.de/
So the commit was not necessary.
The commit made binding and unbinding of USB Ethernet asymmetrical: Before, usbnet_probe() first invoked the ->bind() callback and then register_netdev(). usbnet_disconnect() mirrored that by first invoking unregister_netdev() and then ->unbind().
Since the commit, the order in usbnet_disconnect() is reversed and no longer mirrors usbnet_probe().
One consequence is that a PHY disconnected (and stopped) in ->unbind() is afterwards stopped once more by unregister_netdev() as it closes the netdev before unregistering. That necessitates a contortion in ->stop() because the PHY may only be stopped if it hasn't already been disconnected.
Reverting the commit allows making the call to phy_stop() unconditional in ->stop().
References
- https://access.redhat.com/security/cve/CVE-2022-49501
- https://git.kernel.org/stable/c/6d5deb242874d924beccf7eb3cef04c1c3b0da79
- https://git.kernel.org/stable/c/969a1b3ea3cb7d58a16fe12fd1b04bfc0ea40509
- https://git.kernel.org/stable/c/d1408f6b4dd78fb1b9e26bcf64477984e5f85409
- https://git.kernel.org/stable/c/fbda837107f9bd4ec658d2aa88c6856dba606f06