4.7

CVE-2023-52505

phy: lynx-28g: serialize concurrent phy_set_mode_ext() calls to shared registers

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.
Daten sind bereitgestellt durch National Vulnerability Database (NVD)
Linux ≫ Linux Kernel Version >= 5.18 < 6.1.59
Linux ≫ Linux Kernel Version >= 6.2 < 6.5.8
Linux ≫ Linux Kernel Version6.6 Updaterc1
Linux ≫ Linux Kernel Version6.6 Updaterc2
Linux ≫ Linux Kernel Version6.6 Updaterc3
Linux ≫ Linux Kernel Version6.6 Updaterc4
Linux ≫ Linux Kernel Version6.6 Updaterc5
VulnDex Vulnerability Enrichment
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Zu dieser CVE wurde keine Warnung gefunden.
EPSS Metriken
Typ Quelle Score Percentile
EPSS FIRST.org 0.17% 0.064
CVSS Metriken
Quelle Base Score Exploit Score Impact Score Vector String
NIST 4.7 1 3.6
CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:H
CWE-667 Improper Locking

The product does not properly acquire or release a lock on a resource, leading to unexpected resource state changes and behaviors.

https://git.kernel.org/stable/c/139ad1143151a07be93bf741d4ea7c89e59f89ce
Patch
https://git.kernel.org/stable/c/6f901f8448c6b25ed843796b114471d2a3fc5dfb
Patch
https://git.kernel.org/stable/c/c2d7c79898b427d263c64a4841987eec131f2d4e
Patch