Race Condition Affecting kernel-cross-headers package, versions *
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Test your applications- Snyk ID SNYK-RHEL8-KERNELCROSSHEADERS-7125250
- published 27 May 2024
- disclosed 24 May 2024
How to fix?
There is no fixed version for RHEL:8 kernel-cross-headers.
NVD Description
Note: Versions mentioned in the description apply only to the upstream kernel-cross-headers package and not the kernel-cross-headers package as distributed by RHEL.
See How to fix? for RHEL:8 relevant fixed versions and status.
In the Linux kernel, the following vulnerability has been resolved:
nfsd: Fix nsfd startup race (again)
Commit bd5ae9288d64 ("nfsd: register pernet ops last, unregister first") has re-opened rpc_pipefs_event() race against nfsd_net_id registration (register_pernet_subsys()) which has been fixed by commit bb7ffbf29e76 ("nfsd: fix nsfd startup race triggering BUG_ON").
Restore the order of register_pernet_subsys() vs register_cld_notifier(). Add WARN_ON() to prevent a future regression.
Crash info: Unable to handle kernel NULL pointer dereference at virtual address 0000000000000012 CPU: 8 PID: 345 Comm: mount Not tainted 5.4.144-... #1 pc : rpc_pipefs_event+0x54/0x120 [nfsd] lr : rpc_pipefs_event+0x48/0x120 [nfsd] Call trace: rpc_pipefs_event+0x54/0x120 [nfsd] blocking_notifier_call_chain rpc_fill_super get_tree_keyed rpc_fs_get_tree vfs_get_tree do_mount ksys_mount __arm64_sys_mount el0_svc_handler el0_svc
References
- https://access.redhat.com/security/cve/CVE-2021-47507
- https://git.kernel.org/stable/c/8bf902fee5893cfc2f04a698abab47629699ae9a
- https://git.kernel.org/stable/c/b10252c7ae9c9d7c90552f88b544a44ee773af64
- https://git.kernel.org/stable/c/c520943a00ad5015704969ad3304c956bcd49d25
- https://git.kernel.org/stable/c/f5734b1714ca355703e9ea8fb61d04beff1790b9