CVE-2026-97983
Linux: vduse: return compat ioctl results directly
Linux LinuxOperating systemsCVSS
NoneNot scoredExploitationNo known exploitationNot in CISA KEV, which does not prove it is unexploitedCISA KEV
Exploit odds (EPSS)0.15%Chance of exploitation activity in the next 30 days, higher than 4% of CVEs. Scored 23 Oct 2026FIRST EPSS
Fixed in135ac58097fa5fc707bf392c5cececf59e4080c0Also 48a4ee65e677559776349128e6a81a6041986c99, 7.2CVE List
What fixes it
- 135ac58097fa5fc707bf392c5cececf59e4080c0LinuxCVE List
- 48a4ee65e677559776349128e6a81a6041986c99LinuxCVE List
- 7.2LinuxCVE List
A fixed version on one release line is not the upgrade target for every line. Check your exact version and any vendor backports.
Description
In the Linux kernel, the following vulnerability has been resolved:
vduse: return compat ioctl results directly
The compat handler handles VDUSE_IOTLB_GET_FD and VDUSE_VQ_GET_INFO, but then calls the native handler. Their different command sizes make native dispatch return -ENOIOCTLCMD.
For GET_FD, this overwrites receive_fd()'s return value after the descriptor is installed, leaking one fd per call. Return handled compat results directly and use native dispatch only for other commands.
Text from CVE List
Affected versions 8
- Linuxaffected: 455a2a1af92651764e9eb42cec0d95ac142afc28 before 135ac58097fa5fc707bf392c5cececf59e4080c0CVE List
- Linuxaffected: 455a2a1af92651764e9eb42cec0d95ac142afc28 before 48a4ee65e677559776349128e6a81a6041986c99CVE List
- Linuxaffected: 7dd28904c42ee3b0728c0692dd3332c2c83e8f33CVE List
- Linuxaffected: 7.1.5 before 7.2CVE List
- Linuxaffected: 7.2CVE List
- Linuxunaffected: all versions before 7.2CVE List
- Linuxunaffected: 7.2.7 through 7.2.*CVE List
- Linuxunaffected: 7.3CVE List