Vulnerability · Published Jan 15, 2026 · Assigned by glibc

CVE-2026-0915getnetbyaddr and getnetbyaddr_r leak stack contents to DNS resovler

High 7.5

In plain English

A high-severity security flaw in glibc from The GNU C Library. Proof-of-concept exploit code is public. The chance it is exploited in the next 30 days is estimated at 0.6% (higher than 50% of all known vulnerabilities). Ready-made attack tooling exists: public proof-of-concept code. Fixed versions are available - upgrade the affected package.

Severity (CVSS 3.1)7.5High
Exploit odds (30 days)0.6%top 50.2% of all CVEs
Exploited in the wildNo reportsCISA SSVC: poc
Attack tooling1Public PoC

Official description

Calling getnetbyaddr or getnetbyaddr_r with a configured nsswitch.conf that specifies the library's DNS backend for networks and queries for a zero-valued network in the GNU C Library version 2.0 to version 2.42 can leak stack contents to the configured DNS resolver.

Affected packages & fixed versions

EcosystemPackageFixed inAdvisory
AlmaLinux:9glibc2.34-231.el9_7.10ALSA-2026:2786
AlmaLinux:9glibc-all-langpacks2.34-231.el9_7.10ALSA-2026:2786
AlmaLinux:9glibc-benchtests2.34-231.el9_7.10ALSA-2026:2786
AlmaLinux:9glibc-common2.34-231.el9_7.10ALSA-2026:2786
AlmaLinux:9glibc-devel2.34-231.el9_7.10ALSA-2026:2786
AlmaLinux:10glibc-doc2.39-58.el10_1.7.alma.1ALSA-2026:1334
AlmaLinux:9glibc-doc2.34-231.el9_7.10ALSA-2026:2786
AlmaLinux:9glibc-gconv-extra2.34-231.el9_7.10ALSA-2026:2786
AlmaLinux:9glibc-headers2.34-231.el9_7.10ALSA-2026:2786
AlmaLinux:8glibc-langpack-aa2.28-251.el8_10.31ALSA-2026:4772
AlmaLinux:9glibc-langpack-aa2.34-231.el9_7.10ALSA-2026:2786
AlmaLinux:8glibc-langpack-af2.28-251.el8_10.31ALSA-2026:4772
AlmaLinux:9glibc-langpack-af2.34-231.el9_7.10ALSA-2026:2786
AlmaLinux:8glibc-langpack-agr2.28-251.el8_10.31ALSA-2026:4772
AlmaLinux:9glibc-langpack-agr2.34-231.el9_7.10ALSA-2026:2786
AlmaLinux:8glibc-langpack-ak2.28-251.el8_10.31ALSA-2026:4772
AlmaLinux:9glibc-langpack-ak2.34-231.el9_7.10ALSA-2026:2786
AlmaLinux:8glibc-langpack-am2.28-251.el8_10.31ALSA-2026:4772
AlmaLinux:9glibc-langpack-am2.34-231.el9_7.10ALSA-2026:2786
AlmaLinux:8glibc-langpack-an2.28-251.el8_10.31ALSA-2026:4772
AlmaLinux:9glibc-langpack-an2.34-231.el9_7.10ALSA-2026:2786
AlmaLinux:8glibc-langpack-anp2.28-251.el8_10.31ALSA-2026:4772
AlmaLinux:9glibc-langpack-anp2.34-231.el9_7.10ALSA-2026:2786
AlmaLinux:8glibc-langpack-ar2.28-251.el8_10.31ALSA-2026:4772
AlmaLinux:9glibc-langpack-ar2.34-231.el9_7.10ALSA-2026:2786
AlmaLinux:8glibc-langpack-as2.28-251.el8_10.31ALSA-2026:4772
AlmaLinux:9glibc-langpack-as2.34-231.el9_7.10ALSA-2026:2786
AlmaLinux:8glibc-langpack-ast2.28-251.el8_10.31ALSA-2026:4772
AlmaLinux:9glibc-langpack-ast2.34-231.el9_7.10ALSA-2026:2786
AlmaLinux:8glibc-langpack-ayc2.28-251.el8_10.31ALSA-2026:4772
AlmaLinux:9glibc-langpack-ayc2.34-231.el9_7.10ALSA-2026:2786
AlmaLinux:8glibc-langpack-az2.28-251.el8_10.31ALSA-2026:4772
AlmaLinux:9glibc-langpack-az2.34-231.el9_7.10ALSA-2026:2786
AlmaLinux:8glibc-langpack-be2.28-251.el8_10.31ALSA-2026:4772
AlmaLinux:9glibc-langpack-be2.34-231.el9_7.10ALSA-2026:2786
AlmaLinux:8glibc-langpack-bem2.28-251.el8_10.31ALSA-2026:4772
AlmaLinux:9glibc-langpack-bem2.34-231.el9_7.10ALSA-2026:2786
AlmaLinux:8glibc-langpack-ber2.28-251.el8_10.31ALSA-2026:4772
AlmaLinux:9glibc-langpack-ber2.34-231.el9_7.10ALSA-2026:2786
AlmaLinux:8glibc-langpack-bg2.28-251.el8_10.31ALSA-2026:4772
AlmaLinux:9glibc-langpack-bg2.34-231.el9_7.10ALSA-2026:2786
AlmaLinux:8glibc-langpack-bhb2.28-251.el8_10.31ALSA-2026:4772
AlmaLinux:9glibc-langpack-bhb2.34-231.el9_7.10ALSA-2026:2786
AlmaLinux:8glibc-langpack-bho2.28-251.el8_10.31ALSA-2026:4772
AlmaLinux:9glibc-langpack-bho2.34-231.el9_7.10ALSA-2026:2786
AlmaLinux:8glibc-langpack-bi2.28-251.el8_10.31ALSA-2026:4772
AlmaLinux:9glibc-langpack-bi2.34-231.el9_7.10ALSA-2026:2786
AlmaLinux:8glibc-langpack-bn2.28-251.el8_10.31ALSA-2026:4772
AlmaLinux:9glibc-langpack-bn2.34-231.el9_7.10ALSA-2026:2786
AlmaLinux:8glibc-langpack-bo2.28-251.el8_10.31ALSA-2026:4772
AlmaLinux:9glibc-langpack-bo2.34-231.el9_7.10ALSA-2026:2786
AlmaLinux:8glibc-langpack-br2.28-251.el8_10.31ALSA-2026:4772
AlmaLinux:9glibc-langpack-br2.34-231.el9_7.10ALSA-2026:2786
AlmaLinux:8glibc-langpack-brx2.28-251.el8_10.31ALSA-2026:4772
AlmaLinux:9glibc-langpack-brx2.34-231.el9_7.10ALSA-2026:2786
AlmaLinux:8glibc-langpack-bs2.28-251.el8_10.31ALSA-2026:4772
AlmaLinux:9glibc-langpack-bs2.34-231.el9_7.10ALSA-2026:2786
AlmaLinux:8glibc-langpack-byn2.28-251.el8_10.31ALSA-2026:4772
AlmaLinux:9glibc-langpack-byn2.34-231.el9_7.10ALSA-2026:2786
AlmaLinux:8glibc-langpack-ca2.28-251.el8_10.31ALSA-2026:4772
AlmaLinux:9glibc-langpack-ca2.34-231.el9_7.10ALSA-2026:2786
AlmaLinux:9glibc-langpack-ce2.34-231.el9_7.10ALSA-2026:2786
AlmaLinux:9glibc-langpack-chr2.34-231.el9_7.10ALSA-2026:2786
AlmaLinux:9glibc-langpack-ckb2.34-231.el9_7.10ALSA-2026:2786
AlmaLinux:9glibc-langpack-cmn2.34-231.el9_7.10ALSA-2026:2786
AlmaLinux:9glibc-langpack-crh2.34-231.el9_7.10ALSA-2026:2786
AlmaLinux:8glibc-langpack-cs2.28-251.el8_10.31ALSA-2026:4772
AlmaLinux:9glibc-langpack-cs2.34-231.el9_7.10ALSA-2026:2786
AlmaLinux:8glibc-langpack-csb2.28-251.el8_10.31ALSA-2026:4772
AlmaLinux:9glibc-langpack-csb2.34-231.el9_7.10ALSA-2026:2786
AlmaLinux:8glibc-langpack-cv2.28-251.el8_10.31ALSA-2026:4772
AlmaLinux:9glibc-langpack-cv2.34-231.el9_7.10ALSA-2026:2786
AlmaLinux:8glibc-langpack-cy2.28-251.el8_10.31ALSA-2026:4772
AlmaLinux:9glibc-langpack-cy2.34-231.el9_7.10ALSA-2026:2786
AlmaLinux:8glibc-langpack-da2.28-251.el8_10.31ALSA-2026:4772
AlmaLinux:9glibc-langpack-da2.34-231.el9_7.10ALSA-2026:2786
AlmaLinux:8glibc-langpack-de2.28-251.el8_10.31ALSA-2026:4772
AlmaLinux:9glibc-langpack-de2.34-231.el9_7.10ALSA-2026:2786
AlmaLinux:8glibc-langpack-doi2.28-251.el8_10.31ALSA-2026:4772
AlmaLinux:9glibc-langpack-doi2.34-231.el9_7.10ALSA-2026:2786
AlmaLinux:8glibc-langpack-dsb2.28-251.el8_10.31ALSA-2026:4772
AlmaLinux:9glibc-langpack-dsb2.34-231.el9_7.10ALSA-2026:2786
AlmaLinux:9glibc-langpack-dv2.34-231.el9_7.10ALSA-2026:2786
AlmaLinux:9glibc-langpack-dz2.34-231.el9_7.10ALSA-2026:2786
AlmaLinux:9glibc-langpack-el2.34-231.el9_7.10ALSA-2026:2786
AlmaLinux:9glibc-langpack-en2.34-231.el9_7.10ALSA-2026:2786
AlmaLinux:9glibc-langpack-eo2.34-231.el9_7.10ALSA-2026:2786
AlmaLinux:8glibc-langpack-es2.28-251.el8_10.31ALSA-2026:4772
AlmaLinux:9glibc-langpack-es2.34-231.el9_7.10ALSA-2026:2786
AlmaLinux:8glibc-langpack-et2.28-251.el8_10.31ALSA-2026:4772
AlmaLinux:9glibc-langpack-et2.34-231.el9_7.10ALSA-2026:2786
AlmaLinux:8glibc-langpack-eu2.28-251.el8_10.31ALSA-2026:4772
AlmaLinux:9glibc-langpack-eu2.34-231.el9_7.10ALSA-2026:2786
AlmaLinux:8glibc-langpack-fa2.28-251.el8_10.31ALSA-2026:4772
AlmaLinux:9glibc-langpack-fa2.34-231.el9_7.10ALSA-2026:2786
AlmaLinux:8glibc-langpack-ff2.28-251.el8_10.31ALSA-2026:4772
AlmaLinux:9glibc-langpack-ff2.34-231.el9_7.10ALSA-2026:2786
AlmaLinux:8glibc-langpack-fi2.28-251.el8_10.31ALSA-2026:4772
AlmaLinux:9glibc-langpack-fi2.34-231.el9_7.10ALSA-2026:2786
AlmaLinux:8glibc-langpack-fil2.28-251.el8_10.31ALSA-2026:4772
AlmaLinux:9glibc-langpack-fil2.34-231.el9_7.10ALSA-2026:2786
AlmaLinux:8glibc-langpack-fo2.28-251.el8_10.31ALSA-2026:4772
AlmaLinux:9glibc-langpack-fo2.34-231.el9_7.10ALSA-2026:2786
AlmaLinux:8glibc-langpack-fr2.28-251.el8_10.31ALSA-2026:4772
AlmaLinux:9glibc-langpack-fr2.34-231.el9_7.10ALSA-2026:2786
AlmaLinux:8glibc-langpack-fur2.28-251.el8_10.31ALSA-2026:4772
AlmaLinux:9glibc-langpack-fur2.34-231.el9_7.10ALSA-2026:2786
AlmaLinux:9glibc-langpack-fy2.34-231.el9_7.10ALSA-2026:2786
AlmaLinux:9glibc-langpack-ga2.34-231.el9_7.10ALSA-2026:2786
AlmaLinux:9glibc-langpack-gd2.34-231.el9_7.10ALSA-2026:2786
AlmaLinux:8glibc-langpack-gez2.28-251.el8_10.31ALSA-2026:4772
AlmaLinux:9glibc-langpack-gez2.34-231.el9_7.10ALSA-2026:2786
AlmaLinux:8glibc-langpack-gl2.28-251.el8_10.31ALSA-2026:4772
AlmaLinux:9glibc-langpack-gl2.34-231.el9_7.10ALSA-2026:2786
AlmaLinux:8glibc-langpack-gu2.28-251.el8_10.31ALSA-2026:4772
AlmaLinux:9glibc-langpack-gu2.34-231.el9_7.10ALSA-2026:2786
AlmaLinux:8glibc-langpack-gv2.28-251.el8_10.31ALSA-2026:4772
AlmaLinux:9glibc-langpack-gv2.34-231.el9_7.10ALSA-2026:2786
AlmaLinux:8glibc-langpack-ha2.28-251.el8_10.31ALSA-2026:4772
AlmaLinux:9glibc-langpack-ha2.34-231.el9_7.10ALSA-2026:2786
AlmaLinux:8glibc-langpack-hak2.28-251.el8_10.31ALSA-2026:4772
AlmaLinux:9glibc-langpack-hak2.34-231.el9_7.10ALSA-2026:2786
AlmaLinux:8glibc-langpack-he2.28-251.el8_10.31ALSA-2026:4772
AlmaLinux:9glibc-langpack-he2.34-231.el9_7.10ALSA-2026:2786
AlmaLinux:8glibc-langpack-hi2.28-251.el8_10.31ALSA-2026:4772
AlmaLinux:9glibc-langpack-hi2.34-231.el9_7.10ALSA-2026:2786
AlmaLinux:8glibc-langpack-hif2.28-251.el8_10.31ALSA-2026:4772
AlmaLinux:9glibc-langpack-hif2.34-231.el9_7.10ALSA-2026:2786
AlmaLinux:9glibc-langpack-hne2.34-231.el9_7.10ALSA-2026:2786
AlmaLinux:9glibc-langpack-hr2.34-231.el9_7.10ALSA-2026:2786
AlmaLinux:9glibc-langpack-hsb2.34-231.el9_7.10ALSA-2026:2786
AlmaLinux:9glibc-langpack-ht2.34-231.el9_7.10ALSA-2026:2786
AlmaLinux:9glibc-langpack-hu2.34-231.el9_7.10ALSA-2026:2786
AlmaLinux:9glibc-langpack-hy2.34-231.el9_7.10ALSA-2026:2786
AlmaLinux:9glibc-langpack-ia2.34-231.el9_7.10ALSA-2026:2786
AlmaLinux:9glibc-langpack-id2.34-231.el9_7.10ALSA-2026:2786
AlmaLinux:9glibc-langpack-ig2.34-231.el9_7.10ALSA-2026:2786
AlmaLinux:9glibc-langpack-ik2.34-231.el9_7.10ALSA-2026:2786
AlmaLinux:9glibc-langpack-is2.34-231.el9_7.10ALSA-2026:2786
AlmaLinux:9glibc-langpack-it2.34-231.el9_7.10ALSA-2026:2786
AlmaLinux:9glibc-langpack-iu2.34-231.el9_7.10ALSA-2026:2786
AlmaLinux:9glibc-langpack-ja2.34-231.el9_7.10ALSA-2026:2786
AlmaLinux:9glibc-langpack-ka2.34-231.el9_7.10ALSA-2026:2786
AlmaLinux:9glibc-langpack-kab2.34-231.el9_7.10ALSA-2026:2786
AlmaLinux:9glibc-langpack-kk2.34-231.el9_7.10ALSA-2026:2786
AlmaLinux:9glibc-langpack-kl2.34-231.el9_7.10ALSA-2026:2786
AlmaLinux:9glibc-langpack-km2.34-231.el9_7.10ALSA-2026:2786
AlmaLinux:9glibc-langpack-kn2.34-231.el9_7.10ALSA-2026:2786
AlmaLinux:9glibc-langpack-ko2.34-231.el9_7.10ALSA-2026:2786
AlmaLinux:9glibc-langpack-kok2.34-231.el9_7.10ALSA-2026:2786
AlmaLinux:8glibc-langpack-ks2.28-251.el8_10.31ALSA-2026:4772
AlmaLinux:9glibc-langpack-ks2.34-231.el9_7.10ALSA-2026:2786
AlmaLinux:8glibc-langpack-ku2.28-251.el8_10.31ALSA-2026:4772
AlmaLinux:9glibc-langpack-ku2.34-231.el9_7.10ALSA-2026:2786
AlmaLinux:8glibc-langpack-kw2.28-251.el8_10.31ALSA-2026:4772
AlmaLinux:9glibc-langpack-kw2.34-231.el9_7.10ALSA-2026:2786
AlmaLinux:8glibc-langpack-ky2.28-251.el8_10.31ALSA-2026:4772
AlmaLinux:9glibc-langpack-ky2.34-231.el9_7.10ALSA-2026:2786
AlmaLinux:8glibc-langpack-lb2.28-251.el8_10.31ALSA-2026:4772
AlmaLinux:9glibc-langpack-lb2.34-231.el9_7.10ALSA-2026:2786
AlmaLinux:9glibc-langpack-lg2.34-231.el9_7.10ALSA-2026:2786
AlmaLinux:9glibc-langpack-li2.34-231.el9_7.10ALSA-2026:2786
AlmaLinux:9glibc-langpack-lij2.34-231.el9_7.10ALSA-2026:2786
AlmaLinux:9glibc-langpack-ln2.34-231.el9_7.10ALSA-2026:2786
AlmaLinux:8glibc-langpack-lo2.28-251.el8_10.31ALSA-2026:4772
AlmaLinux:9glibc-langpack-lo2.34-231.el9_7.10ALSA-2026:2786
AlmaLinux:8glibc-langpack-lt2.28-251.el8_10.31ALSA-2026:4772
AlmaLinux:9glibc-langpack-lt2.34-231.el9_7.10ALSA-2026:2786
AlmaLinux:8glibc-langpack-lv2.28-251.el8_10.31ALSA-2026:4772
AlmaLinux:9glibc-langpack-lv2.34-231.el9_7.10ALSA-2026:2786
AlmaLinux:8glibc-langpack-lzh2.28-251.el8_10.31ALSA-2026:4772
AlmaLinux:9glibc-langpack-lzh2.34-231.el9_7.10ALSA-2026:2786
AlmaLinux:8glibc-langpack-mag2.28-251.el8_10.31ALSA-2026:4772
AlmaLinux:9glibc-langpack-mag2.34-231.el9_7.10ALSA-2026:2786
AlmaLinux:8glibc-langpack-mai2.28-251.el8_10.31ALSA-2026:4772
AlmaLinux:9glibc-langpack-mai2.34-231.el9_7.10ALSA-2026:2786
AlmaLinux:8glibc-langpack-mfe2.28-251.el8_10.31ALSA-2026:4772
AlmaLinux:9glibc-langpack-mfe2.34-231.el9_7.10ALSA-2026:2786
AlmaLinux:8glibc-langpack-mg2.28-251.el8_10.31ALSA-2026:4772
AlmaLinux:9glibc-langpack-mg2.34-231.el9_7.10ALSA-2026:2786
AlmaLinux:8glibc-langpack-mhr2.28-251.el8_10.31ALSA-2026:4772
AlmaLinux:9glibc-langpack-mhr2.34-231.el9_7.10ALSA-2026:2786
AlmaLinux:9glibc-langpack-mi2.34-231.el9_7.10ALSA-2026:2786
AlmaLinux:9glibc-langpack-miq2.34-231.el9_7.10ALSA-2026:2786
AlmaLinux:9glibc-langpack-mjw2.34-231.el9_7.10ALSA-2026:2786
AlmaLinux:9glibc-langpack-mk2.34-231.el9_7.10ALSA-2026:2786
AlmaLinux:9glibc-langpack-ml2.34-231.el9_7.10ALSA-2026:2786
AlmaLinux:9glibc-langpack-mn2.34-231.el9_7.10ALSA-2026:2786
AlmaLinux:9glibc-langpack-mni2.34-231.el9_7.10ALSA-2026:2786
AlmaLinux:9glibc-langpack-mnw2.34-231.el9_7.10ALSA-2026:2786
AlmaLinux:9glibc-langpack-mr2.34-231.el9_7.10ALSA-2026:2786
AlmaLinux:9glibc-langpack-ms2.34-231.el9_7.10ALSA-2026:2786
AlmaLinux:9glibc-langpack-mt2.34-231.el9_7.10ALSA-2026:2786
AlmaLinux:9glibc-langpack-my2.34-231.el9_7.10ALSA-2026:2786
AlmaLinux:9glibc-langpack-nan2.34-231.el9_7.10ALSA-2026:2786
AlmaLinux:9glibc-langpack-nb2.34-231.el9_7.10ALSA-2026:2786
AlmaLinux:9glibc-langpack-nds2.34-231.el9_7.10ALSA-2026:2786
AlmaLinux:9glibc-langpack-ne2.34-231.el9_7.10ALSA-2026:2786
AlmaLinux:9glibc-langpack-nhn2.34-231.el9_7.10ALSA-2026:2786
AlmaLinux:9glibc-langpack-niu2.34-231.el9_7.10ALSA-2026:2786

Affected products (as reported)

VendorProductVersions
The GNU C Library glibc 2.0 – through 2.42

Weakness: CWE-908 · Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N

References