CVE-2020-12657 — Use After Free in Kernel

CWE-416 — Use After Free20 documents8 sources
Severity
7.8HIGHNVD
OSV6.7OSV4.4
EPSS
0.0%
top 87.90%
CISA KEV
Not in KEV
Exploit
No known exploits
Affected products
5
Linux KernelDebian LinuxMsrc CBL Mariner 1.0 ARM+2 more
Timeline
PublishedMay 5
Latest updateMay 24

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.

CVSS vector

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:HExploitability: 1.8 | Impact: 5.9

Affected Packages7 packages

▶NVDlinux/linux_kernel< 5.6.5
▶Debianlinux/linux_kernel< 5.6.7-1+3
▶Ubuntulinux/linux_kernel< 4.15.0-101.102+2
▶debiandebian/linux< linux 5.6.7-1 (bookworm)

Patches

Patch: git.kernel.org ↗Patch: github.com ↗Patch: patchwork.kernel.org ↗

🔴Vulnerability Details

8
GHSA
GHSA-9rm7-vxm7-wq42: An issue was discovered in the Linux kernel before 5↗2022-05-24
▶
OSV
linux regression↗2020-05-28
▶
OSV
linux, linux-aws, linux-aws-hwe, linux-azure, linux-azure-4.15, linux-gcp, linux-gke-4.15, linux-hwe, linux-kvm, linux-oem, linux-oracle, linux-raspi2, linux-snapdragon vulnerabilities↗2020-05-28
▶
OSV
linux, linux-raspi2, linux-raspi2-5.3 regression↗2020-05-28
▶
OSV
linux, linux-aws, linux-aws-5.3, linux-azure, linux-azure-5.3, linux-gcp, linux-gcp-5.3, linux-gke-5.3, linux-hwe, linux-kvm, linux-oracle, linux-oracle-5.3, linux-raspi2 vulnerabilities↗2020-05-24
▶

📋Vendor Advisories

9
Ubuntu
Linux kernel regression↗2020-05-28
▶
Ubuntu
Linux kernel regression↗2020-05-28
▶
Ubuntu
Linux kernel vulnerabilities↗2020-05-28
▶
Ubuntu
Linux kernel vulnerabilities↗2020-05-24
▶
Ubuntu
Linux kernel vulnerabilities↗2020-05-24
▶

💬Community

2
Bugzilla
CVE-2020-12657 kernel: use-after-free in block/bfq-iosched.c related to bfq_idle_slice_timer_body↗2020-05-07
▶
Bugzilla
CVE-2020-12657 kernel: use-after-free in block/bfq-iosched.c related to bfq_idle_slice_timer_body [fedora-all]↗2020-05-07
▶