pci/hotplug/pnv_php: Fix hotplug driver crash on Powernv
- Published
- Last modified
- Where the record stands: published, rejected by its publisher, or superseded by another id.What do these mean? →
- published
- Whether CISA lists it in its Known Exploited Vulnerabilities catalog: proof that attackers are using it.What do these mean? →
- Not listed in CISA KEV
- Fix
- Fixed in 4.10, 4.11
- Whether working attack code is public (Exploit-DB, Metasploit, Nuclei or GitHub). Public code makes attacks easier.What do these mean? →
- None on Exploit-DB, Metasploit or GitHub
- Exploitation: none
- Automatable: no
- Technical impact: partial
Summary
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.
Timeline
- CVE published
- CISA SSVC assessment
Exploitation: none · Automatable: no · Technical impact: partial
- Record last updated
Affected versions
- Linux Linux
From 4.9.14 · fixed in 4.10; From 4.10.2 · fixed in 4.11
- Linux Linux
4.11
References 8
git.kernel.org
- stable/c/4eb4085c1346d19d4a05c55246eb93e74e671048
- stable/c/c4c681999d385e28f84808bbf3a85ea8e982da55
- stable/c/bc1faed19db95abf0933b104910a3fb01b138f59
- stable/c/c0d8094dc740cfacf3775bbc6a1c4720459e8de4
- stable/c/438d522227374042b5c8798f8ce83bbe479dca4d
- stable/c/b82d4d5c736f4fd2ed224c35f554f50d1953d21e
- stable/c/bfc44075b19740d372f989f21dd03168bfda0689
- stable/c/335e35b748527f0c06ded9eebb65387f60647fda