Bug 2165706 (CVE-2022-3534)

Summary: CVE-2022-3534 Kernel: use-after-free in btf_dump_name_dups in tools/lib/bpf/btf_dump.c
Product: [Other] Security Response Reporter: Rohit Keshri <rkeshri>
Component: vulnerabilityAssignee: Nobody <nobody>
Status: NEW --- QA Contact:
Severity: low Docs Contact:
Priority: low    
Version: unspecifiedCC: acaringi, bhu, chwhite, crwood, ddepaula, debarbos, dfreiber, dvlasenk, ezulian, fhrbata, hkrzesin, jarod, jburrell, jfaracco, jferlan, jforbes, jlelli, joe.lawrence, jshortt, jstancek, jwyatt, kcarcia, kernel-mgr, lgoncalv, lzampier, nmurray, ptalbert, qzhao, rogbas, rvrbovsk, scweaver, vkumar, walters, williams
Target Milestone: ---Keywords: Security
Target Release: ---   
Hardware: All   
OS: Linux   
Whiteboard:
Fixed In Version: Kernel 6.2 RC1 Doc Type: ---
Doc Text:
A use-after-free flaw was found in btf_dump_name_dups in tools/lib/bpf/btf_dump.c in libbpf in the Linux Kernel. This issue occurs because the key stored in the hash table name_map is a string address, and the string memory is allocated by realloc() function. When the memory is resized by realloc() later, the old memory may be freed.
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oVirt Team: --- RHEL 7.3 requirements from Atomic Host:
Cloudforms Team: --- Target Upstream Version:
Embargoed:
Bug Depends On: 2165709, 2165710, 2165711, 2165712    
Bug Blocks: 2135596    

Description Rohit Keshri 2023-01-30 19:48:40 UTC 
A use-after-free vulnerability was found in btf_dump_name_dups in tools/lib/bpf/btf_dump.c in libbpf in the Linux Kernel.

Reference:
https://git.kernel.org/pub/scm/linux/kernel/git/bpf/bpf-next.git/commit/?id=93c660ca40b5d2f7c1b1626e955a8e9fa30e0749