CVE-2015-7550

Published: Feb 8, 2016Modified: May 6, 2026

5.5

Vector

CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

Exploitability: 1.8 / Impact: 3.6

Source: NVD

Description

The keyctl_read_key function in security/keys/keyctl.c in the Linux kernel before 4.3.4 does not properly use a semaphore, which allows local users to cause a denial of service (NULL pointer dereference and system crash) or possibly have unspecified other impact via a crafted application that leverages a race condition between keyctl_revoke and keyctl_read calls.

Affected (1)

Products: Linux: Linux Kernel

1 product

Configuration A

1 vulnerable

Vulnerable Software	Affected Versions
Linux Linux Kernel	Up to 4.3.3

Related CWEs

Concurrent Execution using Shared Resource with Improper Synchronization ('Race Condition')

The product contains a code sequence that can run concurrently with other code, and the code sequence requires temporary, exclusive access to a shared resource, but a timing window exists in which the shared resource can be modified by another code sequence that is operating concurrently.

References (32)

http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=b4a1b4f5047e4f54e194681125c74c0aa64d637d

Source: secalert@redhat.com

Vendor Advisory

http://lists.opensuse.org/opensuse-security-announce/2016-03/msg00094.html

Source: secalert@redhat.com

http://lists.opensuse.org/opensuse-security-announce/2016-04/msg00045.html

Source: secalert@redhat.com

http://lists.opensuse.org/opensuse-security-announce/2016-08/msg00038.html

Source: secalert@redhat.com

http://www.debian.org/security/2016/dsa-3434

Source: secalert@redhat.com

http://www.kernel.org/pub/linux/kernel/v4.x/ChangeLog-4.3.4

Source: secalert@redhat.com

Vendor Advisory

http://www.securityfocus.com/bid/79903

Source: secalert@redhat.com

http://www.ubuntu.com/usn/USN-2888-1

Source: secalert@redhat.com

http://www.ubuntu.com/usn/USN-2890-1

Source: secalert@redhat.com

http://www.ubuntu.com/usn/USN-2890-2

Source: secalert@redhat.com

http://www.ubuntu.com/usn/USN-2890-3

Source: secalert@redhat.com

http://www.ubuntu.com/usn/USN-2911-1

Source: secalert@redhat.com

http://www.ubuntu.com/usn/USN-2911-2

Source: secalert@redhat.com

https://bugzilla.redhat.com/show_bug.cgi?id=1291197

Source: secalert@redhat.com

https://github.com/torvalds/linux/commit/b4a1b4f5047e4f54e194681125c74c0aa64d637d

Source: secalert@redhat.com

https://security-tracker.debian.org/tracker/CVE-2015-7550

Source: secalert@redhat.com

http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=b4a1b4f5047e4f54e194681125c74c0aa64d637d

Source: af854a3a-2127-422b-91ae-364da2661108

Vendor Advisory

http://lists.opensuse.org/opensuse-security-announce/2016-03/msg00094.html

Source: af854a3a-2127-422b-91ae-364da2661108

http://lists.opensuse.org/opensuse-security-announce/2016-04/msg00045.html

Source: af854a3a-2127-422b-91ae-364da2661108

http://lists.opensuse.org/opensuse-security-announce/2016-08/msg00038.html

Source: af854a3a-2127-422b-91ae-364da2661108

http://www.debian.org/security/2016/dsa-3434

Source: af854a3a-2127-422b-91ae-364da2661108

http://www.kernel.org/pub/linux/kernel/v4.x/ChangeLog-4.3.4

Source: af854a3a-2127-422b-91ae-364da2661108

Vendor Advisory

http://www.securityfocus.com/bid/79903

Source: af854a3a-2127-422b-91ae-364da2661108

http://www.ubuntu.com/usn/USN-2888-1

Source: af854a3a-2127-422b-91ae-364da2661108

http://www.ubuntu.com/usn/USN-2890-1

Source: af854a3a-2127-422b-91ae-364da2661108

http://www.ubuntu.com/usn/USN-2890-2

Source: af854a3a-2127-422b-91ae-364da2661108

http://www.ubuntu.com/usn/USN-2890-3

Source: af854a3a-2127-422b-91ae-364da2661108

http://www.ubuntu.com/usn/USN-2911-1

Source: af854a3a-2127-422b-91ae-364da2661108

http://www.ubuntu.com/usn/USN-2911-2

Source: af854a3a-2127-422b-91ae-364da2661108

https://bugzilla.redhat.com/show_bug.cgi?id=1291197

Source: af854a3a-2127-422b-91ae-364da2661108

https://github.com/torvalds/linux/commit/b4a1b4f5047e4f54e194681125c74c0aa64d637d

Source: af854a3a-2127-422b-91ae-364da2661108

https://security-tracker.debian.org/tracker/CVE-2015-7550

Source: af854a3a-2127-422b-91ae-364da2661108

Timeline

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