VulnerabilityModified
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.
HIGH 8.8EPSS 1.21%
Does this matter?
High impact if exploited, but EPSS currently rates exploitation as unlikely (1.21%). Schedule it in the normal patch cycle and watch for a rise in EPSS or a public exploit.
Description
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.
- CVSS 3.1
- 8.8 HIGHCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H
- EPSS
- 1.21% probability · 67th percentile
- CISA KEV
- Not listed
- Weakness
- CWE-416
- Affected
- linux/linux kernel · redhat/virtualization · redhat/enterprise linux · netapp/hci baseboard management controller
- Source
- secalert@redhat.com
References
- https://bugzilla.redhat.com/show_bug.cgi?id=2034514Issue Tracking, Patch, Third Party Advisory
- https://cloud.google.com/anthos/clusters/docs/security-bulletins#gcp-2022-002Third Party Advisory
- https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=3b0462726e7ef281c35a7a4ae33e93ee2bc9975bMailing List, Patch, Vendor Advisory
- https://security.netapp.com/advisory/ntap-20220225-0004/Third Party Advisory
- https://bugzilla.redhat.com/show_bug.cgi?id=2034514Issue Tracking, Patch, Third Party Advisory
- https://cloud.google.com/anthos/clusters/docs/security-bulletins#gcp-2022-002Third Party Advisory
- https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=3b0462726e7ef281c35a7a4ae33e93ee2bc9975bMailing List, Patch, Vendor Advisory
- https://security.netapp.com/advisory/ntap-20220225-0004/Third Party Advisory
Source: NVD record, EPSS from FIRST.org, KEV from CISA. Refreshed daily.