The probability is the direct output of the EPSS model, and conveys an overall sense of the threat of exploitation in the wild. The percentile measures the EPSS probability relative to all known EPSS scores. Note: This data is updated daily, relying on the latest available EPSS model version. Check out the EPSS documentation for more details.
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Test your applicationsUpgrade RHEL:9
kernel-rt
to version 0:5.14.0-70.64.1.rt21.135.el9_0 or higher.
This issue was patched in RHSA-2023:4138
.
Note: Versions mentioned in the description apply only to the upstream kernel-rt
package and not the kernel-rt
package as distributed by RHEL
.
See How to fix?
for RHEL:9
relevant fixed versions and status.
A use-after-free vulnerability in the Linux Kernel Performance Events system can be exploited to achieve local privilege escalation.
The perf_group_detach function did not check the event's siblings' attach_state before calling add_event_to_groups(), but remove_on_exec made it possible to call list_del_event() on before detaching from their group, making it possible to use a dangling pointer causing a use-after-free vulnerability.
We recommend upgrading past commit fd0815f632c24878e325821943edccc7fde947a2.