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Ubuntu: (CVE-2023-52505): linux-nvidia-6.5 vulnerability

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Ubuntu: (CVE-2023-52505): linux-nvidia-6.5 vulnerability

Severity
4
CVSS
(AV:L/AC:M/Au:S/C:N/I:N/A:C)
Published
03/02/2024
Created
11/21/2024
Added
11/19/2024
Modified
01/30/2025

Description

In the Linux kernel, the following vulnerability has been resolved: phy: lynx-28g: serialize concurrent phy_set_mode_ext() calls to shared registers The protocol converter configuration registers PCC8, PCCC, PCCD (implemented by the driver), as well as others, control protocol converters from multiple lanes (each represented as a different struct phy). So, if there are simultaneous calls to phy_set_mode_ext() to lanes sharing the same PCC register (either for the "old" or for the "new" protocol), corruption of the values programmed to hardware is possible, because lynx_28g_rmw() has no locking. Add a spinlock in the struct lynx_28g_priv shared by all lanes, and take the global spinlock from the phy_ops :: set_mode() implementation. There are no other callers which modify PCC registers.

Solution(s)

  • ubuntu-upgrade-linux-nvidia-6-5

References

  • https://attackerkb.com/topics/cve-2023-52505
  • CVE - 2023-52505
  • https://git.kernel.org/linus/139ad1143151a07be93bf741d4ea7c89e59f89ce
  • https://www.cve.org/CVERecord?id=CVE-2023-52505
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