Reference page — cumulative record through Monday, October 19, 2026 UTC. Reference pages update as the archive grows; only dated daily editions are immutable pages of record.
CVE-2019-7309
n/a n/a — In the GNU C Library (aka glibc or libc6) through 2.29, the memcmp function for the x32 architecture can incorrectly return zero (indicat…
AV AC PR UI S C I A CVSS EPSS %ile KEV
L L L N U N N H 5.5 .0061 48.0 —
AFFECTED
Product Versions Fixed
n/a n/a – —
TIMELINE
Feb 2 Reserved by mitre
Feb 3 Published (CNA: mitre)
Oct 14 ENRICHED — CVE-2019-7309. Received CVSS 5.5 and CPE data from NVD.
Oct 14 EXPLOIT PUBLISHED — CVE-2019-7309. Public exploit reference added.
Description
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.
Lifecycle
Complete event history — 4 events, chronological
| Date | Event | Detail |
|---|
| February 2, 2019 | Reserved | Reserved by mitre |
| February 3, 2019 | Published | Published (CNA: mitre) |
| October 14, 2026 | ENRICHED | ENRICHED — CVE-2019-7309. Received CVSS 5.5 and CPE data from NVD. |
| October 14, 2026 | EXPLOIT PUBLISHED | EXPLOIT PUBLISHED — CVE-2019-7309. Public exploit reference added. |
Affected
Affected products and packages — 1 row
| Vendor | Product / Package | Ecosystem | Version introduced | Fixed |
|---|
| n/a | n/a | — | n/a | — |
About this page
This is a reference page, not a dated page of record. It assembles the complete lifecycle of CVE-2019-7309 from the CVE Program record, NVD enrichment, the CISA KEV catalog, EPSS, and OSV advisories. The box score's numbers (CVSS, EPSS, KEV status) are current as of Monday, October 19, 2026 UTC and are re-derived as the archive grows; only dated daily editions are immutable pages of record. The authoritative source for this identifier is cve.org.
