Bug 2320254 (CVE-2024-47675)

Summary: CVE-2024-47675 kernel: bpf: Fix use-after-free in bpf_uprobe_multi_link_attach()
Product: [Other] Security Response Reporter: OSIDB Bzimport <bzimport>
Component: vulnerabilityAssignee: Product Security DevOps Team <prodsec-dev>
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Priority: medium    
Version: unspecifiedCC: dfreiber, drow, jburrell, vkumar
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Hardware: All   
OS: Linux   
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Bug Depends On: 2320364    
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Description OSIDB Bzimport 2024-10-21 13:05:48 UTC 
In the Linux kernel, the following vulnerability has been resolved:

bpf: Fix use-after-free in bpf_uprobe_multi_link_attach()

If bpf_link_prime() fails, bpf_uprobe_multi_link_attach() goes to the
error_free label and frees the array of bpf_uprobe's without calling
bpf_uprobe_unregister().

This leaks bpf_uprobe->uprobe and worse, this frees bpf_uprobe->consumer
without removing it from the uprobe->consumers list.
Comment 1 Robb Gatica 2024-10-21 15:25:53 UTC 
Upstream advisory:
https://lore.kernel.org/linux-cve-announce/2024102103-CVE-2024-47675-643d@gregkh/T
Comment 2 errata-xmlrpc 2024-12-11 01:19:53 UTC 
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 9.4 Extended Update Support

Via RHSA-2024:10942 https://access.redhat.com/errata/RHSA-2024:10942
Comment 3 errata-xmlrpc 2024-12-19 00:43:12 UTC 
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 9

Via RHSA-2024:11486 https://access.redhat.com/errata/RHSA-2024:11486