CVE-2024-46761

pci/hotplug/pnv_php: Fix hotplug driver crash on Powernv

State: Published
Severity: Not scored
Published: Sep 18, 2024
Updated: May 23, 2026
Reserved: Sep 11, 2024

Description

In the Linux kernel, the following vulnerability has been resolved:

pci/hotplug/pnv_php: Fix hotplug driver crash on Powernv

The hotplug driver for powerpc (pci/hotplug/pnv_php.c) causes a kernel crash when we try to hot-unplug/disable the PCIe switch/bridge from the PHB.

The crash occurs because although the MSI data structure has been released during disable/hot-unplug path and it has been assigned with NULL, still during unregistration the code was again trying to explicitly disable the MSI which causes the NULL pointer dereference and kernel crash.

The patch fixes the check during unregistration path to prevent invoking pci_disable_msi/msix() since its data structure is already freed.

Scores

The record has no CVSS score.

Weaknesses

The record names no weakness.

Affected Products

Product	Versions
LinuxLinux	49f4b08e61547a5ccd2db551d994c4503efe5666 to before 4eb4085c1346d19d4a05c55246eb93e74e671048Affected 49f4b08e61547a5ccd2db551d994c4503efe5666 to before c4c681999d385e28f84808bbf3a85ea8e982da55Affected 49f4b08e61547a5ccd2db551d994c4503efe5666 to before bc1faed19db95abf0933b104910a3fb01b138f59Affected 49f4b08e61547a5ccd2db551d994c4503efe5666 to before c0d8094dc740cfacf3775bbc6a1c4720459e8de4Affected 49f4b08e61547a5ccd2db551d994c4503efe5666 to before 438d522227374042b5c8798f8ce83bbe479dca4dAffected 49f4b08e61547a5ccd2db551d994c4503efe5666 to before b82d4d5c736f4fd2ed224c35f554f50d1953d21eAffected 49f4b08e61547a5ccd2db551d994c4503efe5666 to before bfc44075b19740d372f989f21dd03168bfda0689Affected 49f4b08e61547a5ccd2db551d994c4503efe5666 to before 335e35b748527f0c06ded9eebb65387f60647fdaAffected 1fb738a3dc1304250c755e5e31715137c1c44c50Affected bc4c9766324a7e9fda48de58691796430c8511bfAffected 4.9.14 to before 4.10Affected 4.10.2 to before 4.11Affected
LinuxLinux	4.11Affected before 4.11Not affected 4.19.322 through 4.19.Not affected 5.4.284 through 5.4.Not affected 5.10.226 through 5.10.Not affected 5.15.167 through 5.15.Not affected 6.1.110 through 6.1.Not affected 6.6.51 through 6.6.Not affected 6.10.10 through 6.10.*Not affected 6.11 and laterNot affected

Product

Versions

LinuxLinux

49f4b08e61547a5ccd2db551d994c4503efe5666 to before 4eb4085c1346d19d4a05c55246eb93e74e671048Affected
49f4b08e61547a5ccd2db551d994c4503efe5666 to before c4c681999d385e28f84808bbf3a85ea8e982da55Affected
49f4b08e61547a5ccd2db551d994c4503efe5666 to before bc1faed19db95abf0933b104910a3fb01b138f59Affected
49f4b08e61547a5ccd2db551d994c4503efe5666 to before c0d8094dc740cfacf3775bbc6a1c4720459e8de4Affected
49f4b08e61547a5ccd2db551d994c4503efe5666 to before 438d522227374042b5c8798f8ce83bbe479dca4dAffected
49f4b08e61547a5ccd2db551d994c4503efe5666 to before b82d4d5c736f4fd2ed224c35f554f50d1953d21eAffected
49f4b08e61547a5ccd2db551d994c4503efe5666 to before bfc44075b19740d372f989f21dd03168bfda0689Affected
49f4b08e61547a5ccd2db551d994c4503efe5666 to before 335e35b748527f0c06ded9eebb65387f60647fdaAffected
1fb738a3dc1304250c755e5e31715137c1c44c50Affected
bc4c9766324a7e9fda48de58691796430c8511bfAffected
4.9.14 to before 4.10Affected
4.10.2 to before 4.11Affected

LinuxLinux

4.11Affected
before 4.11Not affected
4.19.322 through 4.19.*Not affected
5.4.284 through 5.4.*Not affected
5.10.226 through 5.10.*Not affected
5.15.167 through 5.15.*Not affected
6.1.110 through 6.1.*Not affected
6.6.51 through 6.6.*Not affected
6.10.10 through 6.10.*Not affected
6.11 and laterNot affected

References

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