Information disclosure in Linux Kernel
CVE-2022-4543
A flaw named "EntryBleed" was found in the Linux Kernel Page Table Isolation (KPTI). This issue could allow a local attacker to leak KASLR base via prefetch side-channels based on TLB timing for Intel systems.
Vulnerability class: Information Disclosure
Published · last modified .
CVSS v3 metric
CVSS v3 base score 5.5 (Medium). Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N.
EPSS exploit prediction
EPSS: 0.010 (59.9th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 60th percentile — 59.9% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.010 · newest: 0.010 · change: 0.000
Affected products
- Linux Kernel
- Linux Kernel — versions all versions
Weakness classification (CWE)
Public proof-of-concept exploits
References
- www.openwall.com/lists/oss-security/2022/12/16/3 (Exploit, Mailing List, Third Party Advisory)
- www.willsroot.io/2022/12/entrybleed.html (Exploit, Third Party Advisory)
Frequently asked questions
- What is CVE-2022-4543?
- CVE-2022-4543 is a medium-severity vulnerability in Linux Kernel, classified under Information Disclosure. CVSS score: 5.5/10. Published 2023-01-11.
- How severe is CVE-2022-4543?
- Medium severity. CVSS v3 base score is 5.5 out of 10.
- Is CVE-2022-4543 known to be exploited?
- 33 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.