Bug 1568205 (CVE-2018-10124)

Summary: CVE-2018-10124 kernel: Undefined behaviour with INT_MIN argument in kernel/signal.c:kill_something_info() allows for denial of service
Product: [Other] Security Response Reporter: Sam Fowler <sfowler>
Component: vulnerabilityAssignee: Red Hat Product Security <security-response-team>
Status: CLOSED NOTABUG QA Contact:
Severity: medium Docs Contact:
Priority: medium    
Version: unspecifiedCC: airlied, aquini, bhu, blc, bskeggs, dhoward, esammons, ewk, fhrbata, hdegoede, hkrzesin, hwkernel-mgr, iboverma, ichavero, itamar, jarodwilson, jforbes, jglisse, jkacur, john.j5live, jonathan, josef, jross, jwboyer, kernel-maint, kernel-mgr, labbott, lgoncalv, linville, lwang, matt, mchehab, mcressma, mguzik, mjg59, mlangsdo, nmurray, plougher, rt-maint, rvrbovsk, skozina, steved, vdronov, williams, yozone
Target Milestone: ---Keywords: Security
Target Release: ---   
Hardware: All   
OS: Linux   
Whiteboard:
Fixed In Version: kernel 4.13-rc1 Doc Type: If docs needed, set a value
Doc Text:
The Linux kernel has an undefined behavior when an argument of INT_MIN is passed to the kernel/signal.c:kill_something_info() function. A local attacker may be able to exploit this to cause a denial of service.
Story Points: ---
Clone Of: Environment:
Last Closed: 2018-04-23 11:15:09 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:    
Bug Blocks: 1568206    

Description Sam Fowler 2018-04-17 00:52:09 UTC
The Linux kernel has an undefined behaviour when an argument of INT_MIN is passed to the kernel/signal.c:kill_something_info() function. A local attacker may be able to exploit this to cause a denial of service.

References:

https://marc.info/?l=linux-mm&m=149667084508525&w=2

https://news.ycombinator.com/item?id=2972021

An upstream patch:

https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=4ea77014af0d6205b05503d1c7aac6eace11d473

Comment 3 Vladis Dronov 2018-04-23 11:15:09 UTC
Note:

This bug is present in certain Red Hat products, but the security impact is absent. Therefore, we do not consider this bug to be a security flaw.