NULL pointer dereference in FreeBSD
CVE-2020-24385
In MidnightBSD before 1.2.6 and 1.3 before August 2020, and FreeBSD before 7, a NULL pointer dereference was found in the Linux emulation layer that allows attackers to crash the running kernel. During binary interaction, td->td_emuldata in sys/compat/linux/linux_emul.h is not getting initialized and returns NULL from em_find().
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:N/I:N/A:H.
EPSS exploit prediction
EPSS: 0.004 (28.0th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 28th percentile — 28.0% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.004 · newest: 0.004 · change: 0.000
Affected products
Weakness classification (CWE)
Public proof-of-concept exploits
References
- www.midnightbsd.org/notes/ (Release Notes, Vendor Advisory)
- www.midnightbsd.org/security/adv/MIDNIGHTBSD-SA-20:02.txt (Vendor Advisory)
Frequently asked questions
- What is CVE-2020-24385?
- CVE-2020-24385 is a medium-severity vulnerability in FreeBSD, classified under NULL Pointer Dereference. CVSS score: 5.5/10. Published 2020-09-03.
- How severe is CVE-2020-24385?
- Medium severity. CVSS v3 base score is 5.5 out of 10.
- Is CVE-2020-24385 known to be exploited?
- 1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.