CVE-2020-27825 — Race Condition in Kernel

CWE-362 — Race ConditionCWE-416 — Use After Free6 documents6 sources
Severity
5.7MEDIUMNVD
EPSS
0.1%
top 66.40%
CISA KEV
Not in KEV
Exploit
No known exploits
Affected products
4
Linux KernelDebian LinuxRedhat Enterprise Linux+1 more
Timeline
PublishedDec 11
Latest updateMay 24

Description

A use-after-free flaw was found in kernel/trace/ring_buffer.c in Linux kernel (before 5.10-rc1). There was a race problem in trace_open and resize of cpu buffer running parallely on different cpus, may cause a denial of service problem (DOS). This flaw could even allow a local attacker with special user privilege to a kernel information leak threat.

CVSS vector

CVSS:3.1/AV:L/AC:H/PR:H/UI:N/S:U/C:H/I:N/A:HExploitability: 0.5 | Impact: 5.2

Affected Packages4 packages

▶Debianlinux/linux_kernel< 5.9.6-1+3
▶CVEListV5linux/linux_kernelbefore kernel 5.10-rc1

Also affects: Debian Linux 10.0, 9.0, Enterprise Linux 7.0, 8.0

Patches

Patch: bugzilla.redhat.com ↗Patch: bugzilla.redhat.com ↗

🔴Vulnerability Details

3
GHSA
GHSA-wx9f-x53v-pqrr: A use-after-free flaw was found in kernel/trace/ring_buffer↗2022-05-24
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CVEList
CVE-2020-27825: A use-after-free flaw was found in kernel/trace/ring_buffer↗2020-12-11
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OSV
CVE-2020-27825: A use-after-free flaw was found in kernel/trace/ring_buffer↗2020-12-11
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📋Vendor Advisories

2
Red Hat
kernel: use-after-free in the ftrace ring buffer resizing logic due to a race condition↗2020-10-06
▶
Debian
CVE-2020-27825: linux - A use-after-free flaw was found in kernel/trace/ring_buffer.c in Linux kernel (b...↗2020
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CVE-2020-27825 — Race Condition in Linux Kernel | cvebase