High severity7.8NVD Advisory· Published May 5, 2020· Updated Jun 17, 2026

CVE-2020-12657

Description

An issue was discovered in the Linux kernel before 5.6.5. There is a use-after-free in block/bfq-iosched.c related to bfq_idle_slice_timer_body.

AI Insight

LLM-synthesized narrative grounded in this CVE's description and references.

Affected products

102

Linux/Linux kerneldescription
Linux/Kernelllm-fuzzy
Range: <5.6.5
osv-coords100 versions
pkg:rpm/opensuse/kernel-debug&distro=openSUSE%20Leap%2015.1 pkg:rpm/opensuse/kernel-default&distro=openSUSE%20Leap%2015.1 pkg:rpm/opensuse/kernel-docs&distro=openSUSE%20Leap%2015.1 pkg:rpm/opensuse/kernel-kvmsmall&distro=openSUSE%20Leap%2015.1 pkg:rpm/opensuse/kernel-obs-build&distro=openSUSE%20Leap%2015.1 pkg:rpm/opensuse/kernel-obs-qa&distro=openSUSE%20Leap%2015.1 pkg:rpm/opensuse/kernel-source&distro=openSUSE%20Leap%2015.1 pkg:rpm/opensuse/kernel-syms&distro=openSUSE%20Leap%2015.1 pkg:rpm/opensuse/kernel-vanilla&distro=openSUSE%20Leap%2015.1 pkg:rpm/suse/kernel-azure&distro=SUSE%20Linux%20Enterprise%20Module%20for%20Public%20Cloud%2015%20SP1 pkg:rpm/suse/kernel-azure&distro=SUSE%20Linux%20Enterprise%20Server%2012%20SP4 pkg:rpm/suse/kernel-azure&distro=SUSE%20Linux%20Enterprise%20Server%2012%20SP5 pkg:rpm/suse/kernel-azure&distro=SUSE%20Linux%20Enterprise%20Server%20for%20SAP%20Applications%2012%20SP4 pkg:rpm/suse/kernel-azure&distro=SUSE%20Linux%20Enterprise%20Server%20for%20SAP%20Applications%2012%20SP5 pkg:rpm/suse/kernel-default&distro=SUSE%20Linux%20Enterprise%20High%20Availability%20Extension%2012%20SP4 pkg:rpm/suse/kernel-default&distro=SUSE%20Linux%20Enterprise%20High%20Availability%20Extension%2012%20SP5 pkg:rpm/suse/kernel-default&distro=SUSE%20Linux%20Enterprise%20High%20Availability%20Extension%2015 pkg:rpm/suse/kernel-default&distro=SUSE%20Linux%20Enterprise%20High%20Availability%20Extension%2015%20SP1 pkg:rpm/suse/kernel-default&distro=SUSE%20Linux%20Enterprise%20High%20Performance%20Computing%2015-ESPOS pkg:rpm/suse/kernel-default&distro=SUSE%20Linux%20Enterprise%20High%20Performance%20Computing%2015-LTSS pkg:rpm/suse/kernel-default&distro=SUSE%20Linux%20Enterprise%20Live%20Patching%2012%20SP4 pkg:rpm/suse/kernel-default&distro=SUSE%20Linux%20Enterprise%20Live%20Patching%2012%20SP5 pkg:rpm/suse/kernel-default&distro=SUSE%20Linux%20Enterprise%20Live%20Patching%2015 pkg:rpm/suse/kernel-default&distro=SUSE%20Linux%20Enterprise%20Live%20Patching%2015%20SP1 pkg:rpm/suse/kernel-default&distro=SUSE%20Linux%20Enterprise%20Module%20for%20Basesystem%2015%20SP1 pkg:rpm/suse/kernel-default&distro=SUSE%20Linux%20Enterprise%20Module%20for%20Legacy%2015%20SP1 pkg:rpm/suse/kernel-default&distro=SUSE%20Linux%20Enterprise%20Server%2012%20SP4 pkg:rpm/suse/kernel-default&distro=SUSE%20Linux%20Enterprise%20Server%2012%20SP5 pkg:rpm/suse/kernel-default&distro=SUSE%20Linux%20Enterprise%20Server%2015-LTSS pkg:rpm/suse/kernel-default&distro=SUSE%20Linux%20Enterprise%20Server%20for%20SAP%20Applications%2012%20SP4 pkg:rpm/suse/kernel-default&distro=SUSE%20Linux%20Enterprise%20Server%20for%20SAP%20Applications%2012%20SP5 pkg:rpm/suse/kernel-default&distro=SUSE%20Linux%20Enterprise%20Server%20for%20SAP%20Applications%2015 pkg:rpm/suse/kernel-default&distro=SUSE%20Linux%20Enterprise%20Workstation%20Extension%2012%20SP4 pkg:rpm/suse/kernel-default&distro=SUSE%20Linux%20Enterprise%20Workstation%20Extension%2012%20SP5 pkg:rpm/suse/kernel-default&distro=SUSE%20Linux%20Enterprise%20Workstation%20Extension%2015%20SP1 pkg:rpm/suse/kernel-docs&distro=SUSE%20Linux%20Enterprise%20High%20Performance%20Computing%2015-ESPOS pkg:rpm/suse/kernel-docs&distro=SUSE%20Linux%20Enterprise%20High%20Performance%20Computing%2015-LTSS pkg:rpm/suse/kernel-docs&distro=SUSE%20Linux%20Enterprise%20Module%20for%20Development%20Tools%2015%20SP1 pkg:rpm/suse/kernel-docs&distro=SUSE%20Linux%20Enterprise%20Server%2015-LTSS pkg:rpm/suse/kernel-docs&distro=SUSE%20Linux%20Enterprise%20Server%20for%20SAP%20Applications%2015 pkg:rpm/suse/kernel-docs&distro=SUSE%20Linux%20Enterprise%20Software%20Development%20Kit%2012%20SP4 pkg:rpm/suse/kernel-docs&distro=SUSE%20Linux%20Enterprise%20Software%20Development%20Kit%2012%20SP5 pkg:rpm/suse/kernel-livepatch-SLE15-SP1_Update_12&distro=SUSE%20Linux%20Enterprise%20Live%20Patching%2015%20SP1 pkg:rpm/suse/kernel-livepatch-SLE15_Update_18&distro=SUSE%20Linux%20Enterprise%20Live%20Patching%2015 pkg:rpm/suse/kernel-obs-build&distro=SUSE%20Linux%20Enterprise%20High%20Performance%20Computing%2015-ESPOS pkg:rpm/suse/kernel-obs-build&distro=SUSE%20Linux%20Enterprise%20High%20Performance%20Computing%2015-LTSS pkg:rpm/suse/kernel-obs-build&distro=SUSE%20Linux%20Enterprise%20Module%20for%20Development%20Tools%2015%20SP1 pkg:rpm/suse/kernel-obs-build&distro=SUSE%20Linux%20Enterprise%20Server%2015-LTSS pkg:rpm/suse/kernel-obs-build&distro=SUSE%20Linux%20Enterprise%20Server%20for%20SAP%20Applications%2015 pkg:rpm/suse/kernel-obs-build&distro=SUSE%20Linux%20Enterprise%20Software%20Development%20Kit%2012%20SP4 pkg:rpm/suse/kernel-obs-build&distro=SUSE%20Linux%20Enterprise%20Software%20Development%20Kit%2012%20SP5 pkg:rpm/suse/kernel-rt_debug&distro=SUSE%20Linux%20Enterprise%20Real%20Time%2012%20SP4 pkg:rpm/suse/kernel-rt_debug&distro=SUSE%20Linux%20Enterprise%20Real%20Time%2012%20SP5 pkg:rpm/suse/kernel-rt_debug&distro=SUSE%20Real%20Time%20Module%2015%20SP1 pkg:rpm/suse/kernel-rt&distro=SUSE%20Linux%20Enterprise%20Real%20Time%2012%20SP4 pkg:rpm/suse/kernel-rt&distro=SUSE%20Linux%20Enterprise%20Real%20Time%2012%20SP5 pkg:rpm/suse/kernel-rt&distro=SUSE%20Real%20Time%20Module%2015%20SP1 pkg:rpm/suse/kernel-source-azure&distro=SUSE%20Linux%20Enterprise%20Module%20for%20Public%20Cloud%2015%20SP1 pkg:rpm/suse/kernel-source-azure&distro=SUSE%20Linux%20Enterprise%20Server%2012%20SP4 pkg:rpm/suse/kernel-source-azure&distro=SUSE%20Linux%20Enterprise%20Server%2012%20SP5 pkg:rpm/suse/kernel-source-azure&distro=SUSE%20Linux%20Enterprise%20Server%20for%20SAP%20Applications%2012%20SP4 pkg:rpm/suse/kernel-source-azure&distro=SUSE%20Linux%20Enterprise%20Server%20for%20SAP%20Applications%2012%20SP5 pkg:rpm/suse/kernel-source&distro=SUSE%20Linux%20Enterprise%20High%20Performance%20Computing%2015-ESPOS pkg:rpm/suse/kernel-source&distro=SUSE%20Linux%20Enterprise%20High%20Performance%20Computing%2015-LTSS pkg:rpm/suse/kernel-source&distro=SUSE%20Linux%20Enterprise%20Module%20for%20Basesystem%2015%20SP1 pkg:rpm/suse/kernel-source&distro=SUSE%20Linux%20Enterprise%20Module%20for%20Development%20Tools%2015%20SP1 pkg:rpm/suse/kernel-source&distro=SUSE%20Linux%20Enterprise%20Server%2012%20SP4 pkg:rpm/suse/kernel-source&distro=SUSE%20Linux%20Enterprise%20Server%2012%20SP5 pkg:rpm/suse/kernel-source&distro=SUSE%20Linux%20Enterprise%20Server%2015-LTSS pkg:rpm/suse/kernel-source&distro=SUSE%20Linux%20Enterprise%20Server%20for%20SAP%20Applications%2012%20SP4 pkg:rpm/suse/kernel-source&distro=SUSE%20Linux%20Enterprise%20Server%20for%20SAP%20Applications%2012%20SP5 pkg:rpm/suse/kernel-source&distro=SUSE%20Linux%20Enterprise%20Server%20for%20SAP%20Applications%2015 pkg:rpm/suse/kernel-source-rt&distro=SUSE%20Linux%20Enterprise%20Real%20Time%2012%20SP4 pkg:rpm/suse/kernel-source-rt&distro=SUSE%20Linux%20Enterprise%20Real%20Time%2012%20SP5 pkg:rpm/suse/kernel-source-rt&distro=SUSE%20Real%20Time%20Module%2015%20SP1 pkg:rpm/suse/kernel-syms-azure&distro=SUSE%20Linux%20Enterprise%20Module%20for%20Public%20Cloud%2015%20SP1 pkg:rpm/suse/kernel-syms-azure&distro=SUSE%20Linux%20Enterprise%20Server%2012%20SP4 pkg:rpm/suse/kernel-syms-azure&distro=SUSE%20Linux%20Enterprise%20Server%2012%20SP5 pkg:rpm/suse/kernel-syms-azure&distro=SUSE%20Linux%20Enterprise%20Server%20for%20SAP%20Applications%2012%20SP4 pkg:rpm/suse/kernel-syms-azure&distro=SUSE%20Linux%20Enterprise%20Server%20for%20SAP%20Applications%2012%20SP5 pkg:rpm/suse/kernel-syms&distro=SUSE%20Linux%20Enterprise%20High%20Performance%20Computing%2015-ESPOS pkg:rpm/suse/kernel-syms&distro=SUSE%20Linux%20Enterprise%20High%20Performance%20Computing%2015-LTSS pkg:rpm/suse/kernel-syms&distro=SUSE%20Linux%20Enterprise%20Module%20for%20Development%20Tools%2015%20SP1 pkg:rpm/suse/kernel-syms&distro=SUSE%20Linux%20Enterprise%20Server%2012%20SP4 pkg:rpm/suse/kernel-syms&distro=SUSE%20Linux%20Enterprise%20Server%2012%20SP5 pkg:rpm/suse/kernel-syms&distro=SUSE%20Linux%20Enterprise%20Server%2015-LTSS pkg:rpm/suse/kernel-syms&distro=SUSE%20Linux%20Enterprise%20Server%20for%20SAP%20Applications%2012%20SP4 pkg:rpm/suse/kernel-syms&distro=SUSE%20Linux%20Enterprise%20Server%20for%20SAP%20Applications%2012%20SP5 pkg:rpm/suse/kernel-syms&distro=SUSE%20Linux%20Enterprise%20Server%20for%20SAP%20Applications%2015 pkg:rpm/suse/kernel-syms-rt&distro=SUSE%20Linux%20Enterprise%20Real%20Time%2012%20SP4 pkg:rpm/suse/kernel-syms-rt&distro=SUSE%20Linux%20Enterprise%20Real%20Time%2012%20SP5 pkg:rpm/suse/kernel-syms-rt&distro=SUSE%20Real%20Time%20Module%2015%20SP1 pkg:rpm/suse/kernel-vanilla&distro=SUSE%20Linux%20Enterprise%20High%20Performance%20Computing%2015-ESPOS pkg:rpm/suse/kernel-vanilla&distro=SUSE%20Linux%20Enterprise%20High%20Performance%20Computing%2015-LTSS pkg:rpm/suse/kernel-vanilla&distro=SUSE%20Linux%20Enterprise%20Server%2015-LTSS pkg:rpm/suse/kernel-vanilla&distro=SUSE%20Linux%20Enterprise%20Server%20for%20SAP%20Applications%2015 pkg:rpm/suse/kernel-zfcpdump&distro=SUSE%20Linux%20Enterprise%20Module%20for%20Basesystem%2015%20SP1 pkg:rpm/suse/kernel-zfcpdump&distro=SUSE%20Linux%20Enterprise%20Server%2015-LTSS pkg:rpm/suse/kgraft-patch-SLE12-SP4_Update_14&distro=SUSE%20Linux%20Enterprise%20Live%20Patching%2012%20SP4 pkg:rpm/suse/kgraft-patch-SLE12-SP5_Update_5&distro=SUSE%20Linux%20Enterprise%20Live%20Patching%2012%20SP5
< 4.12.14-lp151.28.52.1+ 99 more
- (no CPE)range: < 4.12.14-lp151.28.52.1
- (no CPE)range: < 4.12.14-lp151.28.52.1
- (no CPE)range: < 4.12.14-lp151.28.52.2
- (no CPE)range: < 4.12.14-lp151.28.52.1
- (no CPE)range: < 4.12.14-lp151.28.52.3
- (no CPE)range: < 4.12.14-lp151.28.52.3
- (no CPE)range: < 4.12.14-lp151.28.52.1
- (no CPE)range: < 4.12.14-lp151.28.52.1
- (no CPE)range: < 4.12.14-lp151.28.52.1
- (no CPE)range: < 4.12.14-8.33.1
- (no CPE)range: < 4.12.14-6.43.1
- (no CPE)range: < 4.12.14-16.16.1
- (no CPE)range: < 4.12.14-6.43.1
- (no CPE)range: < 4.12.14-16.16.1
- (no CPE)range: < 4.12.14-95.54.1
- (no CPE)range: < 4.12.14-122.23.1
- (no CPE)range: < 4.12.14-150.52.1
- (no CPE)range: < 4.12.14-197.45.1
- (no CPE)range: < 4.12.14-150.52.1
- (no CPE)range: < 4.12.14-150.52.1
- (no CPE)range: < 4.12.14-95.54.1
- (no CPE)range: < 4.12.14-122.23.1
- (no CPE)range: < 4.12.14-150.52.1
- (no CPE)range: < 4.12.14-197.45.1
- (no CPE)range: < 4.12.14-197.45.1
- (no CPE)range: < 4.12.14-197.45.1
- (no CPE)range: < 4.12.14-95.54.1
- (no CPE)range: < 4.12.14-122.23.1
- (no CPE)range: < 4.12.14-150.52.1
- (no CPE)range: < 4.12.14-95.54.1
- (no CPE)range: < 4.12.14-122.23.1
- (no CPE)range: < 4.12.14-150.52.1
- (no CPE)range: < 4.12.14-95.54.1
- (no CPE)range: < 4.12.14-122.23.1
- (no CPE)range: < 4.12.14-197.45.1
- (no CPE)range: < 4.12.14-150.52.1
- (no CPE)range: < 4.12.14-150.52.1
- (no CPE)range: < 4.12.14-197.45.1
- (no CPE)range: < 4.12.14-150.52.1
- (no CPE)range: < 4.12.14-150.52.1
- (no CPE)range: < 4.12.14-95.54.1
- (no CPE)range: < 4.12.14-122.23.1
- (no CPE)range: < 1-3.5.1
- (no CPE)range: < 1-1.5.1
- (no CPE)range: < 4.12.14-150.52.1
- (no CPE)range: < 4.12.14-150.52.1
- (no CPE)range: < 4.12.14-197.45.1
- (no CPE)range: < 4.12.14-150.52.1
- (no CPE)range: < 4.12.14-150.52.1
- (no CPE)range: < 4.12.14-95.54.1
- (no CPE)range: < 4.12.14-122.23.1
- (no CPE)range: < 4.12.14-8.23.1
- (no CPE)range: < 4.12.14-10.13.1
- (no CPE)range: < 4.12.14-14.28.1
- (no CPE)range: < 4.12.14-8.23.1
- (no CPE)range: < 4.12.14-10.13.1
- (no CPE)range: < 4.12.14-14.28.1
- (no CPE)range: < 4.12.14-8.33.1
- (no CPE)range: < 4.12.14-6.43.1
- (no CPE)range: < 4.12.14-16.16.1
- (no CPE)range: < 4.12.14-6.43.1
- (no CPE)range: < 4.12.14-16.16.1
- (no CPE)range: < 4.12.14-150.52.1
- (no CPE)range: < 4.12.14-150.52.1
- (no CPE)range: < 4.12.14-197.45.1
- (no CPE)range: < 4.12.14-197.45.1
- (no CPE)range: < 4.12.14-95.54.1
- (no CPE)range: < 4.12.14-122.23.1
- (no CPE)range: < 4.12.14-150.52.1
- (no CPE)range: < 4.12.14-95.54.1
- (no CPE)range: < 4.12.14-122.23.1
- (no CPE)range: < 4.12.14-150.52.1
- (no CPE)range: < 4.12.14-8.23.1
- (no CPE)range: < 4.12.14-10.13.1
- (no CPE)range: < 4.12.14-14.28.1
- (no CPE)range: < 4.12.14-8.33.1
- (no CPE)range: < 4.12.14-6.43.1
- (no CPE)range: < 4.12.14-16.16.1
- (no CPE)range: < 4.12.14-6.43.1
- (no CPE)range: < 4.12.14-16.16.1
- (no CPE)range: < 4.12.14-150.52.1
- (no CPE)range: < 4.12.14-150.52.1
- (no CPE)range: < 4.12.14-197.45.1
- (no CPE)range: < 4.12.14-95.54.1
- (no CPE)range: < 4.12.14-122.23.1
- (no CPE)range: < 4.12.14-150.52.1
- (no CPE)range: < 4.12.14-95.54.1
- (no CPE)range: < 4.12.14-122.23.1
- (no CPE)range: < 4.12.14-150.52.1
- (no CPE)range: < 4.12.14-8.23.1
- (no CPE)range: < 4.12.14-10.13.1
- (no CPE)range: < 4.12.14-14.28.1
- (no CPE)range: < 4.12.14-150.52.1
- (no CPE)range: < 4.12.14-150.52.1
- (no CPE)range: < 4.12.14-150.52.1
- (no CPE)range: < 4.12.14-150.52.1
- (no CPE)range: < 4.12.14-197.45.1
- (no CPE)range: < 4.12.14-150.52.1
- (no CPE)range: < 1-6.3.1
- (no CPE)range: < 1-8.3.1

Patches

Vulnerability mechanics

References

git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/nvdPatchVendor Advisory
github.com/torvalds/linux/commit/2f95fa5c955d0a9987ffdc3a095e2f4e62c5f2a9nvdPatchThird Party Advisory
patchwork.kernel.org/patch/11447049/nvdPatchVendor Advisory
cdn.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.6.5nvdRelease NotesVendor Advisory
lists.opensuse.org/opensuse-security-announce/2020-06/msg00022.htmlnvd
security.netapp.com/advisory/ntap-20200608-0001/nvd
usn.ubuntu.com/4363-1/nvd
usn.ubuntu.com/4367-1/nvd
usn.ubuntu.com/4368-1/nvd
usn.ubuntu.com/4369-1/nvd

News mentions

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cvss	0.507
epss	0.001
exploit	0.000
kev	0.000
patch	0.000
ransomware	0.000