CVE-2024-50192

Summary

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

irqchip/gic-v4: Don't allow a VMOVP on a dying VPE

Kunkun Jiang reported that there is a small window of opportunity for userspace to force a change of affinity for a VPE while the VPE has already been unmapped, but the corresponding doorbell interrupt still visible in /proc/irq/.

Plug the race by checking the value of vmapp_count, which tracks whether the VPE is mapped ot not, and returning an error in this case.

This involves making vmapp_count common to both GICv4.1 and its v4.0 ancestor.

Affected Software

VendorProductVersion RangeStatus
LinuxLinux64edfaa9a2342a3ce34f8cb982c2c2df84db4de3 < b7d7b7fc876f836f40bf48a87e07ea18756ba196affected
LinuxLinux64edfaa9a2342a3ce34f8cb982c2c2df84db4de3 < 755b9532c885b8761fb135fedcd705e21e61cccbaffected
LinuxLinux64edfaa9a2342a3ce34f8cb982c2c2df84db4de3 < 64b12b061c5488e2d69e67c4eaae5da64fd30bfeaffected
LinuxLinux64edfaa9a2342a3ce34f8cb982c2c2df84db4de3 < 01282ab5182f85e42234df2ff42f0ce790f465ffaffected
LinuxLinux64edfaa9a2342a3ce34f8cb982c2c2df84db4de3 < d960505a869e66184fff97fb334980a5b797c7c6affected
LinuxLinux64edfaa9a2342a3ce34f8cb982c2c2df84db4de3 < 1442ee0011983f0c5c4b92380e6853afb513841aaffected
LinuxLinux5.6affected
LinuxLinux0 < 5.6unaffected
LinuxLinux5.10.228 <= 5.10.*unaffected
LinuxLinux5.15.169 <= 5.15.*unaffected
LinuxLinux6.1.114 <= 6.1.*unaffected
LinuxLinux6.6.58 <= 6.6.*unaffected
LinuxLinux6.11.5 <= 6.11.*unaffected
LinuxLinux6.12 <= *unaffected

Weaknesses

ADP Enrichment

CISA ADP Vulnrichment

  • SSVC:
  • Exploitation: none
    • Automatable: no
    • Technical Impact: partial

CVE Program Container

Additional References

References