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Test your applicationsUpgrade SLES:15.5
xorg-x11-server-extra
to version 21.1.4-150500.7.32.1 or higher.
Note: Versions mentioned in the description apply only to the upstream xorg-x11-server-extra
package and not the xorg-x11-server-extra
package as distributed by SLES
.
See How to fix?
for SLES:15.5
relevant fixed versions and status.
A use-after-free flaw was found in X.Org and Xwayland. When changing an alarm, the values of the change mask are evaluated one after the other, changing the trigger values as requested, and eventually, SyncInitTrigger() is called. If one of the changes triggers an error, the function will return early, not adding the new sync object, possibly causing a use-after-free when the alarm eventually triggers.