Bug 2000457 (CVE-2021-34866)

Summary: CVE-2021-34866 kernel: eBPF verification flaw
Product: [Other] Security Response Reporter: Dhananjay Arunesh <darunesh>
Component: vulnerabilityAssignee: Red Hat Product Security <security-response-team>
Status: NEW --- QA Contact:
Severity: medium Docs Contact:
Priority: medium    
Version: unspecifiedCC: acaringi, adscvr, airlied, alciregi, bhu, bskeggs, chwhite, dhoward, dvlasenk, hdegoede, hkrzesin, jarod, jarodwilson, jburrell, jeremy, jforbes, jglisse, jlelli, jonathan, josef, jshortt, jstancek, jwboyer, kcarcia, kernel-maint, kernel-mgr, lgoncalv, linville, masami256, mchehab, nmurray, ptalbert, qzhao, rkeshri, rvrbovsk, security-response-team, steved, swood, vkumar, walters, williams
Target Milestone: ---Keywords: Security, Triaged
Target Release: ---   
Hardware: All   
OS: Linux   
Whiteboard:
Fixed In Version: Kernel 5.14 Doc Type: If docs needed, set a value
Doc Text:
A vulnerability was found in Linux Kernel, where a type confusion problem in check_map_func_compatibility() may lead to free arbitrary kernel memory.
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:
Bug Depends On: 2004731, 2004732, 2004733    
Bug Blocks: 1997324, 2014625    

Description Dhananjay Arunesh 2021-09-02 08:00:28 UTC
A vulnerability was found in Linux Kernel, where a type confusion problem in check_map_func_compatibility() may lead to free arbitrary kernel memory.

Reference:
https://git.kernel.org/pub/scm/linux/kernel/git/bpf/bpf.git/commit/?id=5b029a32cfe4600f5e10e36b41778506b90fd4de
https://www.zerodayinitiative.com/advisories/ZDI-21-1148/