Double Free in Apple macOS
CVE-2021-22945
When sending data to an MQTT server, libcurl <= 7.73.0 and 7.78.0 could in some circumstances erroneously keep a pointer to an already freed memory area and both use that again in a subsequent call to send data and also free it *again*.
Vulnerability class: Double Free
Published · last modified .
CVSS v3 metric
CVSS v3 base score 9.1 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H.
EPSS exploit prediction
EPSS: 0.067 (93.9th percentile), scored .
Low probability of exploitation in the next 30 days, but still tracked. 94th percentile — 93.9% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.067 · newest: 0.067 · change: 0.000
Affected products
Weakness classification (CWE)
Public proof-of-concept exploits
References
- hackerone.com/reports/1269242 (Exploit, Patch, Third Party Advisory)
- lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/… (vendor-advisory, Mailing List, Third Party Advisory)
- www.oracle.com/security-alerts/cpuoct2021.html (Patch, Third Party Advisory)
- security.netapp.com/advisory/ntap-20211029-0003/ (Third Party Advisory)
- lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/… (vendor-advisory, Mailing List, Third Party Advisory)
- cert-portal.siemens.com/productcert/pdf/ssa-389290.pdf (Patch, Third Party Advisory)
- support.apple.com/kb/HT213183 (Third Party Advisory)
- seclists.org/fulldisclosure/2022/Mar/29 (mailing-list, Mailing List, Third Party Advisory)
- www.debian.org/security/2022/dsa-5197 (vendor-advisory, Third Party Advisory)
- security.gentoo.org/glsa/202212-01 (vendor-advisory, Third Party Advisory)
Frequently asked questions
- What is CVE-2021-22945?
- CVE-2021-22945 is a critical-severity vulnerability in Apple macOS, classified under Double Free. CVSS score: 9.1/10. Published 2021-09-23.
- How severe is CVE-2021-22945?
- Critical severity. CVSS v3 base score is 9.1 out of 10.
- Is CVE-2021-22945 known to be exploited?
- 7 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.