CVE-2020-24863: freebsd Out-of-bounds Write
Vulnerability summary
CVE-2020-24863 is a medium (CVSS 5.5) Out-of-bounds Write vulnerability in freebsd. EPSS estimates a 0.53% chance of exploitation in the next 30 days, higher than 43.8% of scored vulnerabilities. 2 public exploits are recorded.
Timeline
- 03-09-2020PublishedVulnerability first disclosed.
- 04-08-2024Last modifiedVulnerability information updated.
Description
A memory corruption vulnerability was found in the kernel function kern_getfsstat in MidnightBSD before 1.2.7 and 1.3 through 2020-08-19, and FreeBSD through 11.4, that allows an attacker to trigger an invalid free and crash the system via a crafted size value in conjunction with an invalid mode.
CVSS metrics
2 scores · 1 source · 2 versionsEPSS trend
Probability
0.53%
Chance of exploitation in the next 30 days
Percentile
44%
Versus all other CVEs
30-day change
0.00 pp
From 0.53% on 19-09-2026
Known exploited
Compare KEV catalogsNot in any of the 3 tracked catalogs.
Public exploits
2 foundSrc
Maturity: poc
Exploit Reference (midnightbsd.org)
Maturity: unknown
Weaknesses
CWE · root causeAffected systems
Freebsd1 product
- freebsd≤ 11.4
Midnightbsd1 product
- midnightbsd< 1.2.7 | ≥ 1.3, ≤ 2020-08-19
2 vendors · 2 products
References
4 links- github.com/MidnightBSD/src/blob/1691c07ff4f27b97220a5d65e217341e477f4014/sys/kern/vfs_syscalls.cX Refsource MISCExploitThird Party Advisory
- www.freebsd.org/security/advisories/FreeBSD-EN-20:18.getfsstat.ascX Refsource CONFIRMPatchVendor Advisory