Use After Free in Linux Kernel
CVE-2023-5633
The reference count changes made as part of the CVE-2023-33951 and CVE-2023-33952 fixes exposed a use-after-free flaw in the way memory objects were handled when they were being used to store a surface. When running inside a VMware guest with 3D acceleration enabled, a local, unprivileged user could potentially use this flaw to escalate their privileges.
Published · last modified .
CVSS v3 metric
CVSS v3 base score 7.8 (High). Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H.
EPSS exploit prediction
EPSS: 0.003 (20.3th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 20th percentile — 20.3% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.003 · newest: 0.003 · change: -0.000
Affected products
- Linux Kernel — versions 6.6
- Red Hat Enterprise Linux 6
- Red Hat Enterprise Linux 7
- Red Hat Enterprise Linux 8 — versions 0:4.18.0-513.11.1.rt7.313.el8_9, 0:4.18.0-513.11.1.el8_9
- Red Hat Enterprise Linux 8.8 Extended Update Support — versions 0:4.18.0-477.51.1.el8_8
- Red Hat Enterprise Linux 9 — versions 0:5.14.0-362.18.1.el9_3
- Red Hat Enterprise Linux 9.2 Extended Update Support — versions 0:5.14.0-284.75.1.el9_2, 0:5.14.0-284.75.1.rt14.360.el9_2
- Red Hat Codeready Linux Builder — versions 8.0, 9.0
- Red Hat Codeready Linux Builder Eus — versions 8.8, 9.2, 9.4
- Red Hat Codeready Linux Builder For Arm64 — versions 8.0_aarch64, 9.0_aarch64
Weakness classification (CWE)
Public proof-of-concept exploits
References
- access.redhat.com/errata/RHSA-2024:0113 (vendor-advisory, Third Party Advisory)
- access.redhat.com/errata/RHSA-2024:0134 (vendor-advisory, Third Party Advisory)
- access.redhat.com/errata/RHSA-2024:0461 (vendor-advisory, Third Party Advisory)
- access.redhat.com/errata/RHSA-2024:1404 (vendor-advisory, Third Party Advisory)
- access.redhat.com/errata/RHSA-2024:4823 (vendor-advisory, Third Party Advisory)
- access.redhat.com/errata/RHSA-2024:4831 (vendor-advisory, Third Party Advisory)
- access.redhat.com/security/cve/CVE-2023-5633 (Third Party Advisory, vdb-entry)
- bugzilla.redhat.com/show_bug.cgi (issue-tracking, Patch, Issue Tracking)
Frequently asked questions
- What is CVE-2023-5633?
- CVE-2023-5633 is a high-severity vulnerability in Linux Kernel, classified under CWE-911. CVSS score: 7.8/10. Published 2023-10-23.
- How severe is CVE-2023-5633?
- High severity. CVSS v3 base score is 7.8 out of 10.
- Is CVE-2023-5633 known to be exploited?
- 2 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.