CVE-2022-4543
MEDIUMCVSS 5.5/10EPSS 0.95%
Last modified
CVE-2022-4543 is a medium-severity vulnerability rated 5.5/10 on the CVSS scale. 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.. EPSS estimates a 0.95% chance of exploitation in the next 30 days.
Description
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.
Metrics
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N
Weakness Enumeration
Affected Software
| Vendor | Product | Versions |
|---|---|---|
| Linux | Linux Kernel | All versions |
References
- https://www.openwall.com/lists/oss-security/2022/12/16/3Exploit, Mailing List, Third Party Advisory
- https://www.willsroot.io/2022/12/entrybleed.htmlExploit, Third Party Advisory
- https://www.openwall.com/lists/oss-security/2022/12/16/3Exploit, Mailing List, Third Party Advisory
- https://www.willsroot.io/2022/12/entrybleed.htmlExploit, Third Party Advisory
Timeline
- Published
- Last Modified
- Status
- Modified
Frequently Asked Questions
What is 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.
How severe is CVE-2022-4543?
CVE-2022-4543 has a CVSS score of 5.5/10 (MEDIUM severity). The EPSS model estimates a 0.95% probability of exploitation in the next 30 days.
How do I fix CVE-2022-4543?
Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.
Are you affected by CVE-2022-4543?
Run a free Strix scan to check your systems for this vulnerability.
Scan your code nowSource: NVD / NIST