Bug 2300454 (CVE-2024-41077)

Summary: CVE-2024-41077 kernel: null_blk: fix validation of block size
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, jobselko, vkumar
Target Milestone: ---Keywords: Security
Target Release: ---   
Hardware: All   
OS: Linux   
Whiteboard:
Fixed In Version: kernel 5.10.223, kernel 5.15.164, kernel 6.1.101, kernel 6.6.42, kernel 6.9.11, kernel 6.10 Doc Type: If docs needed, set a value
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oVirt Team: --- RHEL 7.3 requirements from Atomic Host:
Cloudforms Team: --- Target Upstream Version:
Embargoed:
Bug Depends On: 2301643    
Bug Blocks:    

Description OSIDB Bzimport 2024-07-29 15:50:56 UTC 
In the Linux kernel, the following vulnerability has been resolved:

null_blk: fix validation of block size

Block size should be between 512 and PAGE_SIZE and be a power of 2. The current
check does not validate this, so update the check.

Without this patch, null_blk would Oops due to a null pointer deref when
loaded with bs=1536 [1].


[axboe: remove unnecessary braces and != 0 check]
Comment 1 Mauro Matteo Cascella 2024-07-30 14:02:13 UTC 
Upstream advisory:
https://lore.kernel.org/linux-cve-announce/2024072910-CVE-2024-41077-9c88@gregkh/T
Comment 2 Mauro Matteo Cascella 2024-07-30 14:02:35 UTC 
Created kernel tracking bugs for this issue:

Affects: fedora-all [bug 2301643]