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Bug 691748 (CVE-2019-1125, SWAPGS) - SWAPGS Spectre side-channel vulnerability (CVE-2019-1125)
Summary: SWAPGS Spectre side-channel vulnerability (CVE-2019-1125)
Status: CONFIRMED
Alias: CVE-2019-1125, SWAPGS
Product: Gentoo Security
Classification: Unclassified
Component: Kernel (show other bugs)
Hardware: All Linux
: Normal normal
Assignee: Gentoo Security
URL: https://labs.bitdefender.com/2019/08/...
Whiteboard:
Keywords:
Depends on:
Blocks:
 
Reported: 2019-08-08 16:19 UTC by kfm
Modified: 2022-10-15 02:50 UTC (History)
1 user (show)

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Description kfm 2019-08-08 16:19:40 UTC 
SUMMARY

Bitdefender senior researchers Dan Horea Luțaș and Andrei Vlad Luțaș recently uncovered a new speculative-execution vulnerability and demonstrated how it can be exploited via a side-channel style attack, dubbed SWAPGS Attack.

FURTHER READING

• https://labs.bitdefender.com/2019/08/bypassing-kpti-using-the-speculative-behavior-of-the-swapgs-instruction/
• https://access.redhat.com/articles/4329821
• https://www.andreafortuna.org/2019/08/07/cve-2019-1125-swapgs-attack-a-new-speculative-execution-side-channel-attack/

SCOPE

Affects Intel processors from Ivy Bridge onwards. AMD have issued a statement claiming that they are not affected because "AMD products are designed not to speculate on the new GS value following a speculative SWAPGS".

MITIGATION

Fixed by the following kernel releases:

• 5.2.7
• 4.19.65
• 4.14.137