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Test your applicationsUpgrade RHEL:8
kernel
to version 0:4.18.0-372.70.1.el8_6 or higher.
This issue was patched in RHSA-2023:4789
.
Note: Versions mentioned in the description apply only to the upstream kernel
package and not the kernel
package as distributed by RHEL
.
See How to fix?
for RHEL:8
relevant fixed versions and status.
A use-after-free vulnerability was found in the Linux kernel's netfilter subsystem in net/netfilter/nf_tables_api.c.
Mishandled error handling with NFT_MSG_NEWRULE makes it possible to use a dangling pointer in the same transaction causing a use-after-free vulnerability. This flaw allows a local attacker with user access to cause a privilege escalation issue.
We recommend upgrading past commit 1240eb93f0616b21c675416516ff3d74798fdc97.