Bug 2003224 (CVE-2020-0430)

Summary: CVE-2020-0430 kernel: possible out-of-bounds read in skb_headlen of /include/linux/skbuff.h
Product: [Other] Security Response Reporter: Guilherme de Almeida Suckevicz <gsuckevi>
Component: vulnerabilityAssignee: Red Hat Product Security <security-response-team>
Status: CLOSED NOTABUG QA Contact:
Severity: medium Docs Contact:
Priority: medium    
Version: unspecifiedCC: acaringi, adscvr, airlied, alciregi, bdettelb, bhu, blc, brdeoliv, bskeggs, chwhite, crwood, dhoward, dvlasenk, fhrbata, fpacheco, hdegoede, hkrzesin, jarod, jarodwilson, jeremy, jforbes, jlelli, jonathan, josef, jshortt, jstancek, jwboyer, kcarcia, kernel-maint, kernel-mgr, lgoncalv, linville, masami256, mchehab, mlangsdo, nmurray, ptalbert, qzhao, rvrbovsk, steved, vkumar, walters, williams
Target Milestone: ---Keywords: Security
Target Release: ---   
Hardware: All   
OS: Linux   
Whiteboard:
Fixed In Version: kernel 4.18-rc1 Doc Type: If docs needed, set a value
Doc Text:
An out of bounds memory read flaw was found in the Linux kernel’s implementation of the eBPF code verifier. A user passing corrupted data to a helper function could access data inside the adjust_ptr_min_max_vals() function. By default, the eBPF verifier is only accessible to users with CAP_SYS_ADMIN privileges. The lack of proper validation of user-supplied eBPF programs prior to execution is the cause of this issue which could lead to a local user's ability to crash the system or possibly escalate their privileges on the system.
 Story Points: ---
Clone Of: Environment:
Last Closed: 2021-09-20 18:21:11 UTC 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: 2003225    
Bug Blocks: 2003226    

Description Guilherme de Almeida Suckevicz 2021-09-10 16:55:08 UTC 
In skb_headlen of /include/linux/skbuff.h, there is a possible out of bounds read due to memory corruption. This could lead to local escalation of privilege with no additional execution privileges needed. User interaction is not needed for exploitation.Product: AndroidVersions: Android kernelAndroid ID: A-153881554

Reference:
https://source.android.com/security/bulletin/pixel/2020-09-01
Comment 1 Guilherme de Almeida Suckevicz 2021-09-10 16:55:44 UTC 
Created kernel tracking bugs for this issue:

Affects: fedora-all [bug 2003225]
Comment 2 Justin M. Forbes 2021-09-14 15:13:10 UTC 
This was fixed with 4.17 kernels for Fedora quite some time ago.
Comment 4 Product Security DevOps Team 2021-09-20 18:21:11 UTC 
This bug is now closed. Further updates for individual products will be reflected on the CVE page(s):

https://access.redhat.com/security/cve/cve-2020-0430