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Bug 1438394 - (CVE-2017-7374) CVE-2017-7374 kernel: use-after-free in keyring key revocation
CVE-2017-7374 kernel: use-after-free in keyring key revocation
Status: CLOSED NOTABUG
Product: Security Response
Classification: Other
Component: vulnerability (Show other bugs)
unspecified
All Linux
low Severity low
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Assigned To: Red Hat Product Security
impact=low,public=20170331,reported=2...
: Security
Depends On:
Blocks: 1438395
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Reported: 2017-04-03 06:41 EDT by Martin Prpič
Modified: 2017-04-27 08:13 EDT (History)
34 users (show)

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Doc Text:
A use-after-free flaw was found in the Linux kernel's file system encryption implementation. A local user could revoke keyring keys being used for ext4, f2fs, or ubifs encryption, causing a denial of service on the system.
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Last Closed: 2017-04-26 06:25:07 EDT
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RHEL 7.3 requirements from Atomic Host:
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Description Martin Prpič 2017-04-03 06:41:06 EDT 
A use-after-free flaw was found in the Linux kernel's file system encryption implementation. A local user could revoke keyring keys being used for ext4, f2fs, or ubifs encryption, causing a denial of service on the system.

Upstream patch:

https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=1b53cf9815bb4744958d41f3795d5d5a1d365e2d
Comment 1 Justin M. Forbes 2017-04-03 08:23:14 EDT 
This is fixed in Fedora with the 4.10.7 and newer stable kernel releases.
Comment 2 Vladis Dronov 2017-04-26 06:24:04 EDT 
Statement:

This issue does not affect the Linux kernel packages as shipped with Red Hat Enterprise Linux 5, 6, 7 and MRG-2 as the code where the flaw was found is not present in these products.
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