CVE-2017-7495

Severity: medium (CVSS 5.5 v3.0)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.4% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2017-05-15 · updated 2026-06-17
Weakness: CWE-200

Description

fs/ext4/inode.c in the Linux kernel before 4.6.2, when ext4 data=ordered mode is used, mishandles a needs-flushing-before-commit list, which allows local users to obtain sensitive information from other users' files in opportunistic circumstances by waiting for a hardware reset, creating a new file, making write system calls, and reading this file.

Affected products

Linux kernel: through 4.6.1

References

http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=06bd3c36a733ac27962fea7d6f47168841376824
http://www.kernel.org/pub/linux/kernel/v4.x/ChangeLog-4.6.2
http://www.openwall.com/lists/oss-security/2017/05/15/2
http://www.securityfocus.com/bid/98491
https://bugzilla.redhat.com/show_bug.cgi?id=1450261
https://github.com/torvalds/linux/commit/06bd3c36a733ac27962fea7d6f47168841376824
https://source.android.com/security/bulletin/2017-09-01
http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=06bd3c36a733ac27962fea7d6f47168841376824
http://www.kernel.org/pub/linux/kernel/v4.x/ChangeLog-4.6.2
http://www.openwall.com/lists/oss-security/2017/05/15/2
http://www.securityfocus.com/bid/98491
https://bugzilla.redhat.com/show_bug.cgi?id=1450261

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