Buffer overflow in Apple macOS
CVE-2021-1834
An out-of-bounds write issue was addressed with improved bounds checking. This issue is fixed in macOS Big Sur 11.3, Security Update 2021-002 Catalina, Security Update 2021-003 Mojave. A malicious application may be able to execute arbitrary code with kernel privileges.
Vulnerability class: Buffer Overflow
Published · last modified .
CVSS v3 metric
CVSS v3 base score 9.8 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.
EPSS exploit prediction
EPSS: 0.030 (86.8th percentile), scored .
Low probability of exploitation in the next 30 days, but still tracked. 87th percentile — 86.8% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.030 · newest: 0.030 · change: 0.000
Affected products
- Apple macOS — versions unspecified
- Apple Mac OS X — versions 10.14, 10.14.0, 10.14.1
Weakness classification (CWE)
Public proof-of-concept exploits
References
- support.apple.com/en-us/HT212325 (Vendor Advisory)
- support.apple.com/en-us/HT212326 (Vendor Advisory)
- support.apple.com/en-us/HT212327 (Vendor Advisory)
Frequently asked questions
- What is CVE-2021-1834?
- CVE-2021-1834 is a critical-severity vulnerability in Apple macOS, classified under Out-of-bounds Write. CVSS score: 9.8/10. Published 2021-09-08.
- How severe is CVE-2021-1834?
- Critical severity. CVSS v3 base score is 9.8 out of 10.
- Is CVE-2021-1834 known to be exploited?
- 1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.