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.

Score

CVSS 3.0 5.5 Medium

Status

Modified - cve@mitre.org

Published

2019-02-03

Last modified

2026-10-14

Affected products

• Glibc (Gnu)
• Simatic S7-1500 Cpu 1518-4 Pndp Mfp (Siemens)
• Simatic S7-1500 Cpu 1518f-4 Pndp Mfp (Siemens)
• Siplus S7-1500 Cpu 1518-4 Pndp Mfp (Siemens)

References

• http://www.securityfocus.com/bid/106835
• https://sourceware.org/bugzilla/show_bug.cgi?id=24155
• https://sourceware.org/ml/libc-alpha/2019-02/msg00041.html
• https://security.gentoo.org/glsa/202006-04
• https://cert-portal.siemens.com/productcert/html/ssa-398330.html