Bug 2300513 (CVE-2024-42075)

Summary: CVE-2024-42075 kernel: bpf: Fix remap of arena.
Product: [Other] Security Response Reporter: OSIDB Bzimport <bzimport>
Component: vulnerabilityAssignee: Product Security DevOps Team <prodsec-dev>
Status: NEW --- QA Contact:
Severity: low Docs Contact:
Priority: low    
Version: unspecifiedCC: dfreiber, drow, jburrell, vkumar
Target Milestone: ---Keywords: Security
Target Release: ---   
Hardware: All   
OS: Linux   
Whiteboard:
Fixed In Version: kernel 6.9.8, kernel 6.10 Doc Type: If docs needed, set a value
Doc Text:
Story Points: ---
Clone Of: Environment:
Last Closed: Type: ---
Regression: --- Mount Type: ---
Documentation: --- CRM:
Verified Versions: Category: ---
oVirt Team: --- RHEL 7.3 requirements from Atomic Host:
Cloudforms Team: --- Target Upstream Version:
Embargoed:
Bug Depends On: 2301710    
Bug Blocks:    

Description OSIDB Bzimport 2024-07-29 16:27:56 UTC 
In the Linux kernel, the following vulnerability has been resolved:

bpf: Fix remap of arena.

The bpf arena logic didn't account for mremap operation. Add a refcnt for
multiple mmap events to prevent use-after-free in arena_vm_close.
Comment 1 Mauro Matteo Cascella 2024-07-30 16:44:03 UTC 
Upstream advisory:
https://lore.kernel.org/linux-cve-announce/2024072954-CVE-2024-42075-febc@gregkh/T
Comment 2 Mauro Matteo Cascella 2024-07-30 16:44:23 UTC 
Created kernel tracking bugs for this issue:

Affects: fedora-all [bug 2301710]