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Test your applicationsUpgrade RHEL:9
kernel-rt-64k-debug-devel
to version 0:5.14.0-570.49.1.el9_6 or higher.
This issue was patched in RHSA-2025:16880
.
Note: Versions mentioned in the description apply only to the upstream kernel-rt-64k-debug-devel
package and not the kernel-rt-64k-debug-devel
package as distributed by RHEL
.
See How to fix?
for RHEL:9
relevant fixed versions and status.
In the Linux kernel, the following vulnerability has been resolved:
io_uring/futex: ensure io_futex_wait() cleans up properly on failure
The io_futex_data is allocated upfront and assigned to the io_kiocb async_data field, but the request isn't marked with REQ_F_ASYNC_DATA at that point. Those two should always go together, as the flag tells io_uring whether the field is valid or not.
Additionally, on failure cleanup, the futex handler frees the data but does not clear ->async_data. Clear the data and the flag in the error path as well.
Thanks to Trend Micro Zero Day Initiative and particularly ReDress for reporting this.