Medium severity5.5NVD Advisory· Published Feb 8, 2016· Updated Jun 17, 2026
CVE-2015-7550
CVE-2015-7550
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.
AI Insight
LLM-synthesized narrative grounded in this CVE's description and references.
Affected products
101- osv-coords99 versionspkg:rpm/opensuse/kernel-source&distro=openSUSE%20Tumbleweedpkg:rpm/suse/kernel-bigsmp&distro=SUSE%20Linux%20Enterprise%20Server%2011%20SP3-LTSSpkg:rpm/suse/kernel-bigsmp&distro=SUSE%20Manager%202.1pkg:rpm/suse/kernel-bigsmp&distro=SUSE%20Manager%20Proxy%202.1pkg:rpm/suse/kernel-bigsmp&distro=SUSE%20OpenStack%20Cloud%205pkg:rpm/suse/kernel-default&distro=SUSE%20Linux%20Enterprise%20Desktop%2011%20SP4pkg:rpm/suse/kernel-default&distro=SUSE%20Linux%20Enterprise%20Desktop%2012pkg:rpm/suse/kernel-default&distro=SUSE%20Linux%20Enterprise%20Desktop%2012%20SP1pkg:rpm/suse/kernel-default&distro=SUSE%20Linux%20Enterprise%20Server%2011%20SP2-LTSSpkg:rpm/suse/kernel-default&distro=SUSE%20Linux%20Enterprise%20Server%2011%20SP3-LTSSpkg:rpm/suse/kernel-default&distro=SUSE%20Linux%20Enterprise%20Server%2011%20SP4pkg:rpm/suse/kernel-default&distro=SUSE%20Linux%20Enterprise%20Server%2012pkg:rpm/suse/kernel-default&distro=SUSE%20Linux%20Enterprise%20Server%2012%20SP1pkg:rpm/suse/kernel-default&distro=SUSE%20Linux%20Enterprise%20Server%20for%20SAP%20Applications%2011%20SP4pkg:rpm/suse/kernel-default&distro=SUSE%20Linux%20Enterprise%20Server%20for%20SAP%20Applications%2012pkg:rpm/suse/kernel-default&distro=SUSE%20Linux%20Enterprise%20Server%20for%20SAP%20Applications%2012%20SP1pkg:rpm/suse/kernel-default&distro=SUSE%20Linux%20Enterprise%20Workstation%20Extension%2012pkg:rpm/suse/kernel-default&distro=SUSE%20Linux%20Enterprise%20Workstation%20Extension%2012%20SP1pkg:rpm/suse/kernel-default&distro=SUSE%20Manager%202.1pkg:rpm/suse/kernel-default&distro=SUSE%20Manager%20Proxy%202.1pkg:rpm/suse/kernel-default&distro=SUSE%20OpenStack%20Cloud%205pkg:rpm/suse/kernel-docs&distro=SUSE%20Linux%20Enterprise%20Software%20Development%20Kit%2011%20SP4pkg:rpm/suse/kernel-docs&distro=SUSE%20Linux%20Enterprise%20Software%20Development%20Kit%2012pkg:rpm/suse/kernel-docs&distro=SUSE%20Linux%20Enterprise%20Software%20Development%20Kit%2012%20SP1pkg:rpm/suse/kernel-ec2&distro=SUSE%20Linux%20Enterprise%20Module%20for%20Public%20Cloud%2012pkg:rpm/suse/kernel-ec2&distro=SUSE%20Linux%20Enterprise%20Server%2011%20SP2-LTSSpkg:rpm/suse/kernel-ec2&distro=SUSE%20Linux%20Enterprise%20Server%2011%20SP3-LTSSpkg:rpm/suse/kernel-ec2&distro=SUSE%20Linux%20Enterprise%20Server%2011%20SP4pkg:rpm/suse/kernel-ec2&distro=SUSE%20Linux%20Enterprise%20Server%20for%20SAP%20Applications%2011%20SP4pkg:rpm/suse/kernel-ec2&distro=SUSE%20Manager%202.1pkg:rpm/suse/kernel-ec2&distro=SUSE%20Manager%20Proxy%202.1pkg:rpm/suse/kernel-ec2&distro=SUSE%20OpenStack%20Cloud%205pkg:rpm/suse/kernel-obs-build&distro=SUSE%20Linux%20Enterprise%20Software%20Development%20Kit%2012pkg:rpm/suse/kernel-obs-build&distro=SUSE%20Linux%20Enterprise%20Software%20Development%20Kit%2012%20SP1pkg:rpm/suse/kernel-pae&distro=SUSE%20Linux%20Enterprise%20Desktop%2011%20SP4pkg:rpm/suse/kernel-pae&distro=SUSE%20Linux%20Enterprise%20Server%2011%20SP2-LTSSpkg:rpm/suse/kernel-pae&distro=SUSE%20Linux%20Enterprise%20Server%2011%20SP3-LTSSpkg:rpm/suse/kernel-pae&distro=SUSE%20Linux%20Enterprise%20Server%2011%20SP4pkg:rpm/suse/kernel-pae&distro=SUSE%20Linux%20Enterprise%20Server%20for%20SAP%20Applications%2011%20SP4pkg:rpm/suse/kernel-ppc64&distro=SUSE%20Linux%20Enterprise%20Server%2011%20SP4pkg:rpm/suse/kernel-ppc64&distro=SUSE%20Linux%20Enterprise%20Server%20for%20SAP%20Applications%2011%20SP4pkg:rpm/suse/kernel-rt&distro=SUSE%20Linux%20Enterprise%20Real%20Time%2011%20SP4pkg:rpm/suse/kernel-rt_trace&distro=SUSE%20Linux%20Enterprise%20Real%20Time%2011%20SP4pkg:rpm/suse/kernel-source&distro=SUSE%20Linux%20Enterprise%20Desktop%2011%20SP4pkg:rpm/suse/kernel-source&distro=SUSE%20Linux%20Enterprise%20Desktop%2012pkg:rpm/suse/kernel-source&distro=SUSE%20Linux%20Enterprise%20Desktop%2012%20SP1pkg:rpm/suse/kernel-source&distro=SUSE%20Linux%20Enterprise%20Server%2011%20SP2-LTSSpkg:rpm/suse/kernel-source&distro=SUSE%20Linux%20Enterprise%20Server%2011%20SP3-LTSSpkg:rpm/suse/kernel-source&distro=SUSE%20Linux%20Enterprise%20Server%2011%20SP4pkg:rpm/suse/kernel-source&distro=SUSE%20Linux%20Enterprise%20Server%2012pkg:rpm/suse/kernel-source&distro=SUSE%20Linux%20Enterprise%20Server%2012%20SP1pkg:rpm/suse/kernel-source&distro=SUSE%20Linux%20Enterprise%20Server%20for%20SAP%20Applications%2011%20SP4pkg:rpm/suse/kernel-source&distro=SUSE%20Linux%20Enterprise%20Server%20for%20SAP%20Applications%2012pkg:rpm/suse/kernel-source&distro=SUSE%20Linux%20Enterprise%20Server%20for%20SAP%20Applications%2012%20SP1pkg:rpm/suse/kernel-source&distro=SUSE%20Manager%202.1pkg:rpm/suse/kernel-source&distro=SUSE%20Manager%20Proxy%202.1pkg:rpm/suse/kernel-source&distro=SUSE%20OpenStack%20Cloud%205pkg:rpm/suse/kernel-source-rt&distro=SUSE%20Linux%20Enterprise%20Real%20Time%2011%20SP4pkg:rpm/suse/kernel-syms&distro=SUSE%20Linux%20Enterprise%20Desktop%2011%20SP4pkg:rpm/suse/kernel-syms&distro=SUSE%20Linux%20Enterprise%20Desktop%2012pkg:rpm/suse/kernel-syms&distro=SUSE%20Linux%20Enterprise%20Desktop%2012%20SP1pkg:rpm/suse/kernel-syms&distro=SUSE%20Linux%20Enterprise%20Server%2011%20SP2-LTSSpkg:rpm/suse/kernel-syms&distro=SUSE%20Linux%20Enterprise%20Server%2011%20SP3-LTSSpkg:rpm/suse/kernel-syms&distro=SUSE%20Linux%20Enterprise%20Server%2011%20SP4pkg:rpm/suse/kernel-syms&distro=SUSE%20Linux%20Enterprise%20Server%2012pkg:rpm/suse/kernel-syms&distro=SUSE%20Linux%20Enterprise%20Server%2012%20SP1pkg:rpm/suse/kernel-syms&distro=SUSE%20Linux%20Enterprise%20Server%20for%20SAP%20Applications%2011%20SP4pkg:rpm/suse/kernel-syms&distro=SUSE%20Linux%20Enterprise%20Server%20for%20SAP%20Applications%2012pkg:rpm/suse/kernel-syms&distro=SUSE%20Linux%20Enterprise%20Server%20for%20SAP%20Applications%2012%20SP1pkg:rpm/suse/kernel-syms&distro=SUSE%20Manager%202.1pkg:rpm/suse/kernel-syms&distro=SUSE%20Manager%20Proxy%202.1pkg:rpm/suse/kernel-syms&distro=SUSE%20OpenStack%20Cloud%205pkg:rpm/suse/kernel-syms-rt&distro=SUSE%20Linux%20Enterprise%20Real%20Time%2011%20SP4pkg:rpm/suse/kernel-trace&distro=SUSE%20Linux%20Enterprise%20Desktop%2011%20SP4pkg:rpm/suse/kernel-trace&distro=SUSE%20Linux%20Enterprise%20Server%2011%20SP2-LTSSpkg:rpm/suse/kernel-trace&distro=SUSE%20Linux%20Enterprise%20Server%2011%20SP3-LTSSpkg:rpm/suse/kernel-trace&distro=SUSE%20Linux%20Enterprise%20Server%2011%20SP4pkg:rpm/suse/kernel-trace&distro=SUSE%20Linux%20Enterprise%20Server%20for%20SAP%20Applications%2011%20SP4pkg:rpm/suse/kernel-trace&distro=SUSE%20Manager%202.1pkg:rpm/suse/kernel-trace&distro=SUSE%20Manager%20Proxy%202.1pkg:rpm/suse/kernel-trace&distro=SUSE%20OpenStack%20Cloud%205pkg:rpm/suse/kernel-xen&distro=SUSE%20Linux%20Enterprise%20Desktop%2011%20SP4pkg:rpm/suse/kernel-xen&distro=SUSE%20Linux%20Enterprise%20Desktop%2012pkg:rpm/suse/kernel-xen&distro=SUSE%20Linux%20Enterprise%20Desktop%2012%20SP1pkg:rpm/suse/kernel-xen&distro=SUSE%20Linux%20Enterprise%20Server%2011%20SP2-LTSSpkg:rpm/suse/kernel-xen&distro=SUSE%20Linux%20Enterprise%20Server%2011%20SP3-LTSSpkg:rpm/suse/kernel-xen&distro=SUSE%20Linux%20Enterprise%20Server%2011%20SP4pkg:rpm/suse/kernel-xen&distro=SUSE%20Linux%20Enterprise%20Server%2012pkg:rpm/suse/kernel-xen&distro=SUSE%20Linux%20Enterprise%20Server%2012%20SP1pkg:rpm/suse/kernel-xen&distro=SUSE%20Linux%20Enterprise%20Server%20for%20SAP%20Applications%2011%20SP4pkg:rpm/suse/kernel-xen&distro=SUSE%20Linux%20Enterprise%20Server%20for%20SAP%20Applications%2012pkg:rpm/suse/kernel-xen&distro=SUSE%20Linux%20Enterprise%20Server%20for%20SAP%20Applications%2012%20SP1pkg:rpm/suse/kernel-xen&distro=SUSE%20Manager%202.1pkg:rpm/suse/kernel-xen&distro=SUSE%20Manager%20Proxy%202.1pkg:rpm/suse/kernel-xen&distro=SUSE%20OpenStack%20Cloud%205pkg:rpm/suse/kgraft-patch-SLE12-SP1_Update_3&distro=SUSE%20Linux%20Enterprise%20Live%20Patching%2012pkg:rpm/suse/kgraft-patch-SLE12_Update_10&distro=SUSE%20Linux%20Enterprise%20Live%20Patching%2012pkg:rpm/suse/lttng-modules&distro=SUSE%20Linux%20Enterprise%20Server%2012%20SP1pkg:rpm/suse/lttng-modules&distro=SUSE%20Linux%20Enterprise%20Server%20for%20SAP%20Applications%2012%20SP1
< 4.8.13-1.1+ 98 more
- (no CPE)range: < 4.8.13-1.1
- (no CPE)range: < 3.0.101-0.47.79.1
- (no CPE)range: < 3.0.101-0.47.79.1
- (no CPE)range: < 3.0.101-0.47.79.1
- (no CPE)range: < 3.0.101-0.47.79.1
- (no CPE)range: < 3.0.101-71.1
- (no CPE)range: < 3.12.51-52.34.1
- (no CPE)range: < 3.12.53-60.30.1
- (no CPE)range: < 3.0.101-0.7.40.1
- (no CPE)range: < 3.0.101-0.47.79.1
- (no CPE)range: < 3.0.101-71.1
- (no CPE)range: < 3.12.51-52.34.1
- (no CPE)range: < 3.12.53-60.30.1
- (no CPE)range: < 3.0.101-71.1
- (no CPE)range: < 3.12.51-52.34.1
- (no CPE)range: < 3.12.53-60.30.1
- (no CPE)range: < 3.12.51-52.34.1
- (no CPE)range: < 3.12.53-60.30.1
- (no CPE)range: < 3.0.101-0.47.79.1
- (no CPE)range: < 3.0.101-0.47.79.1
- (no CPE)range: < 3.0.101-0.47.79.1
- (no CPE)range: < 3.0.101-71.2
- (no CPE)range: < 3.12.51-52.34.3
- (no CPE)range: < 3.12.53-60.30.2
- (no CPE)range: < 3.12.51-52.34.1
- (no CPE)range: < 3.0.101-0.7.40.1
- (no CPE)range: < 3.0.101-0.47.79.1
- (no CPE)range: < 3.0.101-71.1
- (no CPE)range: < 3.0.101-71.1
- (no CPE)range: < 3.0.101-0.47.79.1
- (no CPE)range: < 3.0.101-0.47.79.1
- (no CPE)range: < 3.0.101-0.47.79.1
- (no CPE)range: < 3.12.51-52.34.1
- (no CPE)range: < 3.12.53-60.30.2
- (no CPE)range: < 3.0.101-71.1
- (no CPE)range: < 3.0.101-0.7.40.1
- (no CPE)range: < 3.0.101-0.47.79.1
- (no CPE)range: < 3.0.101-71.1
- (no CPE)range: < 3.0.101-71.1
- (no CPE)range: < 3.0.101-71.1
- (no CPE)range: < 3.0.101-71.1
- (no CPE)range: < 3.0.101.rt130-51.1
- (no CPE)range: < 3.0.101.rt130-51.1
- (no CPE)range: < 3.0.101-71.1
- (no CPE)range: < 3.12.51-52.34.1
- (no CPE)range: < 3.12.53-60.30.1
- (no CPE)range: < 3.0.101-0.7.40.1
- (no CPE)range: < 3.0.101-0.47.79.1
- (no CPE)range: < 3.0.101-71.1
- (no CPE)range: < 3.12.51-52.34.1
- (no CPE)range: < 3.12.53-60.30.1
- (no CPE)range: < 3.0.101-71.1
- (no CPE)range: < 3.12.51-52.34.1
- (no CPE)range: < 3.12.53-60.30.1
- (no CPE)range: < 3.0.101-0.47.79.1
- (no CPE)range: < 3.0.101-0.47.79.1
- (no CPE)range: < 3.0.101-0.47.79.1
- (no CPE)range: < 3.0.101.rt130-51.1
- (no CPE)range: < 3.0.101-71.1
- (no CPE)range: < 3.12.51-52.34.1
- (no CPE)range: < 3.12.53-60.30.1
- (no CPE)range: < 3.0.101-0.7.40.1
- (no CPE)range: < 3.0.101-0.47.79.1
- (no CPE)range: < 3.0.101-71.1
- (no CPE)range: < 3.12.51-52.34.1
- (no CPE)range: < 3.12.53-60.30.1
- (no CPE)range: < 3.0.101-71.1
- (no CPE)range: < 3.12.51-52.34.1
- (no CPE)range: < 3.12.53-60.30.1
- (no CPE)range: < 3.0.101-0.47.79.1
- (no CPE)range: < 3.0.101-0.47.79.1
- (no CPE)range: < 3.0.101-0.47.79.1
- (no CPE)range: < 3.0.101.rt130-51.1
- (no CPE)range: < 3.0.101-71.1
- (no CPE)range: < 3.0.101-0.7.40.1
- (no CPE)range: < 3.0.101-0.47.79.1
- (no CPE)range: < 3.0.101-71.1
- (no CPE)range: < 3.0.101-71.1
- (no CPE)range: < 3.0.101-0.47.79.1
- (no CPE)range: < 3.0.101-0.47.79.1
- (no CPE)range: < 3.0.101-0.47.79.1
- (no CPE)range: < 3.0.101-71.1
- (no CPE)range: < 3.12.51-52.34.1
- (no CPE)range: < 3.12.53-60.30.1
- (no CPE)range: < 3.0.101-0.7.40.1
- (no CPE)range: < 3.0.101-0.47.79.1
- (no CPE)range: < 3.0.101-71.1
- (no CPE)range: < 3.12.51-52.34.1
- (no CPE)range: < 3.12.53-60.30.1
- (no CPE)range: < 3.0.101-71.1
- (no CPE)range: < 3.12.51-52.34.1
- (no CPE)range: < 3.12.53-60.30.1
- (no CPE)range: < 3.0.101-0.47.79.1
- (no CPE)range: < 3.0.101-0.47.79.1
- (no CPE)range: < 3.0.101-0.47.79.1
- (no CPE)range: < 1-2.1
- (no CPE)range: < 1-2.1
- (no CPE)range: < 2.7.0-3.1
- (no CPE)range: < 2.7.0-3.1
Patches
Vulnerability mechanics
References
16- git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/nvdVendor Advisory
- www.kernel.org/pub/linux/kernel/v4.x/ChangeLog-4.3.4nvdVendor Advisory
- lists.opensuse.org/opensuse-security-announce/2016-03/msg00094.htmlnvd
- lists.opensuse.org/opensuse-security-announce/2016-04/msg00045.htmlnvd
- lists.opensuse.org/opensuse-security-announce/2016-08/msg00038.htmlnvd
- www.debian.org/security/2016/dsa-3434nvd
- www.securityfocus.com/bid/79903nvd
- www.ubuntu.com/usn/USN-2888-1nvd
- www.ubuntu.com/usn/USN-2890-1nvd
- www.ubuntu.com/usn/USN-2890-2nvd
- www.ubuntu.com/usn/USN-2890-3nvd
- www.ubuntu.com/usn/USN-2911-1nvd
- www.ubuntu.com/usn/USN-2911-2nvd
- bugzilla.redhat.com/show_bug.cginvd
- github.com/torvalds/linux/commit/b4a1b4f5047e4f54e194681125c74c0aa64d637dnvd
- security-tracker.debian.org/tracker/CVE-2015-7550nvd
News mentions
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