CVE-2024-44957

Summary

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

xen: privcmd: Switch from mutex to spinlock for irqfds

irqfd_wakeup() gets EPOLLHUP, when it is called by eventfd_release() by way of wake_up_poll(&ctx->wqh, EPOLLHUP), which gets called under spin_lock_irqsave(). We can't use a mutex here as it will lead to a deadlock.

Fix it by switching over to a spin lock.

Affected Software

VendorProductVersion RangeStatus
LinuxLinuxf8941e6c4c712948663ec5d7bbb546f1a0f4e3f6 < c2775ae4d9227729f8ca9ee2a068f62a00d5ea9caffected
LinuxLinuxf8941e6c4c712948663ec5d7bbb546f1a0f4e3f6 < 49f2a5da6785b2dbde93e291cae037662440346eaffected
LinuxLinuxf8941e6c4c712948663ec5d7bbb546f1a0f4e3f6 < 1c682593096a487fd9aebc079a307ff7a6d054a3affected
LinuxLinux6.6affected
LinuxLinux0 < 6.6unaffected
LinuxLinux6.6.46 <= 6.6.*unaffected
LinuxLinux6.10.5 <= 6.10.*unaffected
LinuxLinux6.11 <= *unaffected

Weaknesses

ADP Enrichment

CISA ADP Vulnrichment

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

References