CVE-2026-23063

Summary

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

uacce: ensure safe queue release with state management

Directly calling put_queue carries risks since it cannot guarantee that resources of uacce_queue have been fully released beforehand. So adding a stop_queue operation for the UACCE_CMD_PUT_Q command and leaving the put_queue operation to the final resource release ensures safety.

Queue states are defined as follows:

  • UACCE_Q_ZOMBIE: Initial state
  • UACCE_Q_INIT: After opening uacce
  • UACCE_Q_STARTED: After start is issued via ioctl

When executing poweroff -f in virt while accelerator are still working, uacce_fops_release and uacce_remove may execute concurrently. This can cause uacce_put_queue within uacce_fops_release to access a NULL ops pointer. Therefore, add state checks to prevent accessing freed pointers.

Affected Software

VendorProductVersion RangeStatus
LinuxLinux015d239ac0142ad0e26567fd890ef8d171f13709 < b457abeb5d962db88aaf60e249402fd3073dbfabaffected
LinuxLinux015d239ac0142ad0e26567fd890ef8d171f13709 < 8b57bf1d3b1db692f34bce694a03e41be79f6016affected
LinuxLinux015d239ac0142ad0e26567fd890ef8d171f13709 < 336fb41a186e7c0415ae94fec9e23d1f04b87483affected
LinuxLinux015d239ac0142ad0e26567fd890ef8d171f13709 < 43f233eb6e7b9d88536881a9bc43726d0e34800daffected
LinuxLinux015d239ac0142ad0e26567fd890ef8d171f13709 < 47634d70073890c9c37e39ab4ff93d4b585b028aaffected
LinuxLinux015d239ac0142ad0e26567fd890ef8d171f13709 < 92e4f11e29b98ef424ff72d6371acac03e5d973caffected
LinuxLinux015d239ac0142ad0e26567fd890ef8d171f13709 < 26c08dabe5475d99a13f353d8dd70e518de45663affected
LinuxLinux5.7affected
LinuxLinux0 < 5.7unaffected
LinuxLinux5.10.249 <= 5.10.*unaffected
LinuxLinux5.15.199 <= 5.15.*unaffected
LinuxLinux6.1.162 <= 6.1.*unaffected
LinuxLinux6.6.122 <= 6.6.*unaffected
LinuxLinux6.12.68 <= 6.12.*unaffected
LinuxLinux6.18.8 <= 6.18.*unaffected
LinuxLinux6.19 <= *unaffected

Weaknesses

References