Vulnerability in GNU Glibc
CVE-2019-7309
In the GNU C Library (aka glibc or libc6) through 2.29, the memcmp function for the x32 architecture can incorrectly return zero (indicating that the inputs are equal) because the RDX most significant bit is mishandled.
Published · last modified .
CVSS v3 metric
CVSS v3 base score 5.5 (Medium). Vector: CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H.
EPSS exploit prediction
EPSS: 0.006 (47.0th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 47th percentile — 47.0% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.006 · newest: 0.006 · change: 0.000
Affected products
Public proof-of-concept exploits
References
- www.securityfocus.com/bid/106835 (VDB Entry, Third Party Advisory, vdb-entry)
- sourceware.org/bugzilla/show_bug.cgi (Exploit, Third Party Advisory, Issue Tracking)
- sourceware.org/ml/libc-alpha/2019-02/msg00041.html (Mailing List, Third Party Advisory)
- security.gentoo.org/glsa/202006-04 (vendor-advisory)
Frequently asked questions
- What is CVE-2019-7309?
- CVE-2019-7309 is a medium-severity vulnerability in GNU Glibc. CVSS score: 5.5/10. Published 2019-02-03.
- How severe is CVE-2019-7309?
- Medium severity. CVSS v3 base score is 5.5 out of 10.
- Is CVE-2019-7309 known to be exploited?
- 1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.