Excessive Iteration Affecting kernel-rt package, versions *
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Test your applications- Snyk ID SNYK-CENTOS7-KERNELRT-7827954
- published 23 Aug 2024
- disclosed 22 Aug 2024
Introduced: 22 Aug 2024
CVE-2022-48939 Open this link in a new tabHow to fix?
There is no fixed version for Centos:7 kernel-rt.
NVD Description
Note: Versions mentioned in the description apply only to the upstream kernel-rt package and not the kernel-rt package as distributed by Centos.
See How to fix? for Centos:7 relevant fixed versions and status.
In the Linux kernel, the following vulnerability has been resolved:
bpf: Add schedule points in batch ops
syzbot reported various soft lockups caused by bpf batch operations.
INFO: task kworker/1:1:27 blocked for more than 140 seconds. INFO: task hung in rcu_barrier
Nothing prevents batch ops to process huge amount of data, we need to add schedule points in them.
Note that maybe_wait_bpf_programs(map) calls from generic_map_delete_batch() can be factorized by moving the call after the loop.
This will be done later in -next tree once we get this fix merged, unless there is strong opinion doing this optimization sooner.
References
- https://access.redhat.com/security/cve/CVE-2022-48939
- https://git.kernel.org/stable/c/75134f16e7dd0007aa474b281935c5f42e79f2c8
- https://git.kernel.org/stable/c/7e8099967d0e3ff9d1ae043e80b27fbe46c08417
- https://git.kernel.org/stable/c/7ef94bfb08fb9e73defafbd5ddef6b5a0e2ee12b
- https://git.kernel.org/stable/c/8628f489b749a4f9767991631921dbe3fbcdc784