8.8

CVE-2021-4154

A use-after-free flaw was found in cgroup1_parse_param in kernel/cgroup/cgroup-v1.c in the Linux kernel's cgroup v1 parser. A local attacker with a user privilege could cause a privilege escalation by exploiting the fsconfig syscall parameter leading to a container breakout and a denial of service on the system.

Data is provided by the National Vulnerability Database (NVD)
Linux ≫ Linux Kernel Version >= 5.1 < 5.4.134
Linux ≫ Linux Kernel Version >= 5.5 < 5.10.52
Linux ≫ Linux Kernel Version >= 5.11 < 5.12.19
Linux ≫ Linux Kernel Version >= 5.13 < 5.13.4
Linux ≫ Linux Kernel Version5.14 Updaterc1
Redhat ≫ Virtualization Version4.0
Redhat ≫ Enterprise Linux Version8.0 SwEdition-
Zu dieser CVE wurde keine CISA KEV oder CERT.AT-Warnung gefunden.
EPSS Metriken
Type Source Score Percentile
EPSS FIRST.org 0.75% 0.723
CVSS Metriken
Source Base Score Exploit Score Impact Score Vector string
nvd@nist.gov 8.8 2 6
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H
nvd@nist.gov 7.2 3.9 10
AV:L/AC:L/Au:N/C:C/I:C/A:C
CWE-416 Use After Free

The product reuses or references memory after it has been freed. At some point afterward, the memory may be allocated again and saved in another pointer, while the original pointer references a location somewhere within the new allocation. Any operations using the original pointer are no longer valid because the memory "belongs" to the code that operates on the new pointer.

https://bugzilla.redhat.com/show_bug.cgi?id=2034514
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