Bug 2092549 (CVE-2022-1976)

Summary: CVE-2022-1976 kernel: incorrect in-flight accounting in io_uring leads to use-after-free
Product: [Other] Security Response Reporter: Marian Rehak <mrehak>
Component: vulnerabilityAssignee: Red Hat Product Security <security-response-team>
Status: CLOSED NOTABUG QA Contact:
Severity: high Docs Contact:
Priority: high    
Version: unspecifiedCC: acaringi, adscvr, airlied, alciregi, bdettelb, bhu, brdeoliv, bskeggs, chwhite, ddepaula, dhoward, dvlasenk, fhrbata, fpacheco, hdegoede, hkrzesin, hpa, jarod, jarodwilson, jburrell, jfaracco, jferlan, jforbes, jglisse, jlelli, joe.lawrence, jonathan, josef, jshortt, jstancek, jwboyer, jwyatt, kcarcia, kernel-maint, kernel-mgr, lgoncalv, linville, lzampier, masami256, mchehab, nmurray, ptalbert, qzhao, rvrbovsk, scweaver, security-response-team, steved, swood, vkumar, walters, williams, wmealing
Target Milestone: ---Keywords: Security
Target Release: ---   
Hardware: All   
OS: Linux   
Fixed In Version: kernel 5.19-rc1 Doc Type: If docs needed, set a value
Doc Text:
A flaw was found in the Linux kernel’s implementation of IO-URING. This flaw allows an attacker with local executable permission to create a string of requests that can cause a use-after-free flaw within the kernel. This issue leads to memory corruption and possible privilege escalation.
Story Points: ---
Clone Of: Environment:
Last Closed: 2022-08-23 05:42:17 UTC 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: 2096914    
Bug Blocks: 2092550, 2092551    

Description Marian Rehak 2022-06-01 19:21:36 UTC
A flaw was found in the Linux kernels implementation of IO-URING.   An attacker with a local executable permission can create a string of requests which is able to create a use-after-free flaw within the kernel creating memory corruption and possible privilege escalation.


Comment 2 Marian Rehak 2022-06-14 14:36:24 UTC
Created kernel tracking bugs for this issue:

Affects: fedora-all [bug 2096914]

Comment 3 Justin M. Forbes 2022-06-29 16:13:38 UTC
This was fixed for Fedora with the 5.18.6 stable kernel updates.