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Fencer Vulns
medium 5.6

CVE-2025-5702 json

The strcmp implementation optimized for the Power10 processor in the GNU C Library version 2.39 and later writes to vector registers v20 to…

published 2025-06-05 17 mo ago modified 2026-06-17 4 mo ago also EUVD-2025-17009

cvss
5.6
version 3.1, CNA
cisa kev
Not listed
not in CISA's catalog
epss
0.3%
EPSS 0.3% chance of exploitation in 30 days, percentile 25%
public exploits
0
none known

Summary

The strcmp implementation optimized for the Power10 processor in the GNU C Library version 2.39 and later writes to vector registers v20 to v31 without saving contents from the caller (those registers are defined as non-volatile registers by the powerpc64le ABI), resulting in overwriting of its contents and potentially altering control flow of the caller, or leaking the input strings to the function to other parts of the program.

Patch / fix

  • gnu glibc 2.42
  • glibc Debian 14, Debian 13 2.41-9

debian advisories DEBIAN-CVE-2025-5702

  • glibc Ubuntu 24.04 LTS 2.39-0ubuntu8.5

ubuntu advisories UBUNTU-CVE-2025-5702

Ubuntu security data © Canonical Ltd., from https://github.com/canonical/ubuntu-security-notices via OSV; changed: normalised to fixed package versions per release. CC BY-SA 4.0

  • glibc RHEL 10.0 2.39-43.el10_0
  • libnsl RHEL 10.0 2.39-43.el10_0
  • nss_db RHEL 10.0 2.39-43.el10_0
  • nss_hesiod RHEL 10.0 2.39-43.el10_0
  • glibc-utils RHEL 10.0 2.39-43.el10_0
  • glibc-common RHEL 10.0 2.39-43.el10_0
  • glibc-benchtests RHEL 10.0 2.39-43.el10_0
  • glibc-gconv-extra RHEL 10.0 2.39-43.el10_0

red hat advisories RHSA-2025:11066RHSA-2025:9877

  • grype openSUSE Tumbleweed 0.94.0-1.1

opensuse advisories openSUSE-SU-2025:15227-1

  • glibc AlmaLinux 9 2.34-168.el9_6.20
  • nscd AlmaLinux 9 2.34-168.el9_6.20
  • libnsl AlmaLinux 9 2.34-168.el9_6.20
  • nss_db AlmaLinux 9 2.34-168.el9_6.20
  • nss_hesiod AlmaLinux 9 2.34-168.el9_6.20
  • glibc-utils AlmaLinux 9 2.34-168.el9_6.20
  • glibc-common AlmaLinux 9 2.34-168.el9_6.20
  • glibc-benchtests AlmaLinux 9 2.34-168.el9_6.20

almalinux advisories ALSA-2025:9877

  • glibc Rocky Linux 9 2.34-168.el9_6.20
  • glibc Rocky Linux 10 2.39-43.el10_0

rocky linux advisories RLSA-2025:9877RLSA-2025:11066

Vendor advisories

What the vendors themselves say about their products: affected, fixed or not affected, and what to do.

red hat product security vex CVE-2025-5702 updated cvss 5.6

glibc: Vector register overwrite bug in glibc

  • Red Hat Discovery 2 discovery 2.0.0-1752592913
    fixed: vendor fix RHSA-2025:11487
  • Red Hat Enterprise Linux AppStream (v. 9) glibc-utils 2.34-168.el9_6.20, glibc-locale-source 2.34-168.el9_6.20
    fixed: vendor fix RHSA-2025:9877
  • Red Hat Enterprise Linux AppStream (v. 10) glibc-utils 2.39-43.el10_0, glibc-locale-source 2.39-43.el10_0
    fixed: vendor fix RHSA-2025:11066
  • Red Hat Enterprise Linux BaseOS (v. 9) nscd 2.34-168.el9_6.20, glibc 2.34-168.el9_6.20, libnsl 2.34-168.el9_6.20, glibc-common 2.34-168.el9_6.20, glibc-gconv-extra 2.34-168.el9_6.20, glibc-all-langpacks 2.34-168.el9_6.20, +1 more
    fixed: vendor fix RHSA-2025:9877
  • Red Hat Enterprise Linux BaseOS (v. 10) glibc 2.39-43.el10_0, libnsl 2.39-43.el10_0, glibc-common 2.39-43.el10_0, glibc-gconv-extra 2.39-43.el10_0, glibc-all-langpacks 2.39-43.el10_0, glibc-minimal-langpack 2.39-43.el10_0
    fixed: vendor fix RHSA-2025:11066
  • Red Hat Enterprise Linux CodeReady Linux Builder (v. 9) nss_db 2.34-168.el9_6.20, nss_hesiod 2.34-168.el9_6.20, glibc-benchtests 2.34-168.el9_6.20
    fixed: vendor fix RHSA-2025:9877
  • Red Hat Enterprise Linux CodeReady Linux Builder (v. 10) nss_db 2.39-43.el10_0, nss_hesiod 2.39-43.el10_0, glibc-benchtests 2.39-43.el10_0
    fixed: vendor fix RHSA-2025:11066
  • Red Hat Discovery 2 discovery 2.0.0-1752593703 Red Hat Enterprise Linux 6 nscd, glibc, glibc-utils, compat-glibc, glibc-common Red Hat Enterprise Linux 7 nscd, glibc, glibc-utils, compat-glibc, glibc-common Red Hat Enterprise Linux 8 nscd, glibc, libnsl, nss_db, nss_hesiod, glibc-utils, +7 more
    not affected: vulnerable code not present

Red Hat CSAF VEX © Red Hat, Inc., from https://security.access.redhat.com/data/csaf/v2/vex/; changed: reduced to product statuses and remediations. CC BY 4.0 · csaf

CISA SSVC

Exploitation
Proof of concept is public
Automatable
no
Technical impact
partial
Assessed
17 mo ago

Exploit prediction

0.32% chance of exploitation in the next 30 days, higher than 25% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by version score vector
CISA ADP 3.1 5.6 CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:L
CNA 3.1 5.6 CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:L

Affected products

  • The GNU C Library glibc

Classification

Weakness

References

Sources

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.

CPEs and fixed versions use Anchore's correction of NVD's data: Added CPE configurations because not yet analyzed by NVD.