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NVD / CVE Program· CNA glibc

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

HighCVSS 7.5 · v3.1—Proof of concept Fix available

Noroxi assessment

Priority: Monitor (action score 30/100)

  • Public proof-of-concept code exists (GitHub); there is no record of exploitation in the wild.
  • Probability of exploitation in the next 30 days: 0.61% (FIRST EPSS); higher than 50% of all records.
  • Anyone who can reach it over the internet can trigger it. No account or password is required. No user action is required. No special conditions are required; it is repeatable.
  • According to CISA the attack is automatable: targets can be found by mass scanning.
  • Fixed version: azl3 glibc 2.38-18 on Azure Linux 3.0 2.38-18; cbl2 glibc 2.35-9 on CBL Mariner 2.0 2.35-9.

Low priority for now. Upgrade to azl3 glibc 2.38-18 on Azure Linux 3.0 2.38-18; cbl2 glibc 2.35-9 on CBL Mariner 2.0 2.35-9 or later.

Generated automatically from the record's data: CVSS (NVD and CNA), CISA KEV and SSVC, FIRST EPSS, exploit sources, fixed versions. How we calculate it

Primary sources: NVD · CVE.org · FIRST EPSS

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.

Published
Jan 15, 2026
Updated
Jun 17, 2026
EPSS
0.6% · 50th percentile

Report tools

JSON

Action score

30

Monitor

Low priority for now.

CVSS
30 / 40 · 7.5 / 10
CISA KEV
0 / 30 · Not listed
EPSS
0 / 30 · 0.6%

CISA SSVC decision

Exploitation
proof of concept
Automatable
yes
Technical impact
partial

Vulnrichment: CISA's decision-tree inputs.

Get told when this record changes

  • Not in KEV: no record of exploitation in the wild
  • Proof of concept exists, no weaponized module
  • A fix has been released

If any of these changes, we'll tell you in the daily email digest.

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  • when exploit code appears or is weaponized
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  • when EPSS rises 20 points in a week

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Noroxi analysis

What does it mean in your environment?

The assessment above is generated automatically from the record's data; it doesn't know your environment. Our team verifies on your systems whether this vulnerability is actually exploitable and which mitigation is enough.

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Affected systems

Is your version affected?

Pick the product and type the version you run. It's compared with this record's version ranges in your browser; the version isn't sent anywhere.

VendorProduct
gnuglibc

Versions reported by the vendor

Affected version ranges reported by the assigning authority (glibc). Independent of NVD's CPE analysis and usually ahead of it.

  • The GNU C Library glibc

    • 2.0 and later · up to and including 2.42affected

Affected versions

NVD version ranges (for catalog products). Add the product to your stack with a version and matching uses these.

  • gnu glibc2.0 and later · up to 2.42 inclusive

Package-level exposure

OSV and GitHub Advisory data: ecosystem, package and range. SBOM matching uses this table.

EcosystemPackageAffected rangeFix
AlmaLinux:10glibc-docbefore 2.39-58.el10_1.7.alma.12.39-58.el10_1.7.alma.1
AlmaLinux:8glibc-langpack-aabefore 2.28-251.el8_10.312.28-251.el8_10.31
AlmaLinux:8glibc-langpack-afbefore 2.28-251.el8_10.312.28-251.el8_10.31
AlmaLinux:8glibc-langpack-agrbefore 2.28-251.el8_10.312.28-251.el8_10.31
AlmaLinux:8glibc-langpack-akbefore 2.28-251.el8_10.312.28-251.el8_10.31
AlmaLinux:8glibc-langpack-ambefore 2.28-251.el8_10.312.28-251.el8_10.31
AlmaLinux:8glibc-langpack-anbefore 2.28-251.el8_10.312.28-251.el8_10.31
AlmaLinux:8glibc-langpack-anpbefore 2.28-251.el8_10.312.28-251.el8_10.31
AlmaLinux:8glibc-langpack-arbefore 2.28-251.el8_10.312.28-251.el8_10.31
AlmaLinux:8glibc-langpack-asbefore 2.28-251.el8_10.312.28-251.el8_10.31
AlmaLinux:8glibc-langpack-astbefore 2.28-251.el8_10.312.28-251.el8_10.31
AlmaLinux:8glibc-langpack-aycbefore 2.28-251.el8_10.312.28-251.el8_10.31
AlmaLinux:8glibc-langpack-azbefore 2.28-251.el8_10.312.28-251.el8_10.31
AlmaLinux:8glibc-langpack-bebefore 2.28-251.el8_10.312.28-251.el8_10.31
AlmaLinux:8glibc-langpack-bembefore 2.28-251.el8_10.312.28-251.el8_10.31
AlmaLinux:8glibc-langpack-berbefore 2.28-251.el8_10.312.28-251.el8_10.31
AlmaLinux:8glibc-langpack-bgbefore 2.28-251.el8_10.312.28-251.el8_10.31
AlmaLinux:8glibc-langpack-bhbbefore 2.28-251.el8_10.312.28-251.el8_10.31
AlmaLinux:8glibc-langpack-bhobefore 2.28-251.el8_10.312.28-251.el8_10.31
AlmaLinux:8glibc-langpack-bibefore 2.28-251.el8_10.312.28-251.el8_10.31
AlmaLinux:8glibc-langpack-bnbefore 2.28-251.el8_10.312.28-251.el8_10.31
AlmaLinux:8glibc-langpack-bobefore 2.28-251.el8_10.312.28-251.el8_10.31
AlmaLinux:8glibc-langpack-brbefore 2.28-251.el8_10.312.28-251.el8_10.31
AlmaLinux:8glibc-langpack-brxbefore 2.28-251.el8_10.312.28-251.el8_10.31

+96

Same product

gnu: all records

Other highest-scoring records for the same primary product.

  • CVE-2023-4911Glibc: buffer overflow in ld.so leading to privilege escalationKEV
    80Now
  • CVE-2015-0235Heap-based buffer overflow in the __nss_hostname_digits_dots function in glibc 2.2, and other 2.x versions before 2.18, allows…
    68This week
  • CVE-2015-7547Multiple stack-based buffer overflows in the (1) send_dg and (2) send_vc functions in the libresolv library in the GNU C Library (aka glibc…
    60This week

Published before and after this one in the same product

  • ← EarlierCVE-2025-5745Jun 5, 2025 · The strncmp implementation optimized for the Power10 processor in the GNU C Library version 2.40 and later writes to vector registers v20…
    22Monitor
  • ← EarlierCVE-2026-0861Jan 14, 2026 · Integer overflow in memalign leads to heap corruption
    33Monitor
  • Later →CVE-2025-15281Jan 20, 2026 · wordexp with WRDE_REUSE and WRDE_APPEND may return uninitialized memory
    30Monitor

Remediation

Which version to upgrade to

Fix versions compiled from the vendor, package registries and Microsoft. Verify the vendor's note before upgrading.

Product / packageFixed versionSource
azl3 glibc 2.38-18 on Azure Linux 3.02.38-18 · CBL-Mariner ReleasesMicrosoft (MSRC)
cbl2 glibc 2.35-9 on CBL Mariner 2.02.35-9 · CBL-Mariner ReleasesMicrosoft (MSRC)
almalinux:glibc2.34-231.el9_7.10 · AlmaLinux:9Package registry (OSV)
almalinux:glibc-all-langpacks2.34-231.el9_7.10 · AlmaLinux:9Package registry (OSV)
almalinux:glibc-benchtests2.34-231.el9_7.10 · AlmaLinux:9Package registry (OSV)
almalinux:glibc-common2.34-231.el9_7.10 · AlmaLinux:9Package registry (OSV)
almalinux:glibc-devel2.34-231.el9_7.10 · AlmaLinux:9Package registry (OSV)
almalinux:glibc-doc2.39-58.el10_1.7.alma.1 · AlmaLinux:10Package registry (OSV)
almalinux:glibc-gconv-extra2.34-231.el9_7.10 · AlmaLinux:9Package registry (OSV)
almalinux:glibc-headers2.34-231.el9_7.10 · AlmaLinux:9Package registry (OSV)
almalinux:glibc-langpack-aa2.34-231.el9_7.10 · AlmaLinux:9Package registry (OSV)
almalinux:glibc-langpack-af2.34-231.el9_7.10 · AlmaLinux:9Package registry (OSV)
almalinux:glibc-langpack-agr2.34-231.el9_7.10 · AlmaLinux:9Package registry (OSV)
almalinux:glibc-langpack-ak2.34-231.el9_7.10 · AlmaLinux:9Package registry (OSV)
debian:glibc2.36-9+deb12u14 · Debian:12Package registry (OSV)
opensuse:glibc2.38-150600.14.40.1 · openSUSE:Leap 15.6Package registry (OSV)
opensuse:glibc-cross-aarch64-src2.40-160000.3.1 · openSUSE:Leap 16.0Package registry (OSV)
opensuse:glibc-cross-ppc64le-src2.40-160000.3.1 · openSUSE:Leap 16.0Package registry (OSV)
opensuse:glibc-cross-riscv64-src2.40-160000.3.1 · openSUSE:Leap 16.0Package registry (OSV)
opensuse:glibc-cross-s390x-src2.40-160000.3.1 · openSUSE:Leap 16.0Package registry (OSV)
red hat:glibc-benchtests-debuginfo0:2.39-58.el10_1.7 · Red Hat:enterprise_linux:10.1Package registry (OSV)
red hat:glibc-common-debuginfo0:2.39-58.el10_1.7 · Red Hat:enterprise_linux:10.1Package registry (OSV)
red hat:glibc-debuginfo0:2.39-58.el10_1.7 · Red Hat:enterprise_linux:10.1Package registry (OSV)
red hat:glibc-debugsource0:2.39-58.el10_1.7 · Red Hat:enterprise_linux:10.1Package registry (OSV)
red hat:glibc-devel0:2.39-58.el10_1.7 · Red Hat:enterprise_linux:10.1Package registry (OSV)
red hat:glibc-doc0:2.39-58.el10_1.7 · Red Hat:enterprise_linux:10.1Package registry (OSV)
red hat:glibc-gconv-extra-debuginfo0:2.39-58.el10_1.7 · Red Hat:enterprise_linux:10.1Package registry (OSV)
red hat:glibc-locale-source0:2.39-58.el10_1.7 · Red Hat:enterprise_linux:10.1Package registry (OSV)
red hat:glibc-utils0:2.39-58.el10_1.7 · Red Hat:enterprise_linux:10.1Package registry (OSV)
red hat:glibc-utils-debuginfo0:2.39-58.el10_1.7 · Red Hat:enterprise_linux:10.1Package registry (OSV)

+4

Exploit status

Proof of concept available

A public proof of concept or detection signature exists. Exploit knowledge is out there; don't delay patching.

Evidence

  • Proof-of-concept repository on GitHub ×1

Noroxi does not host or link to exploit code. Metasploit module names and Nuclei template ids are shown (names, not code); Exploit-DB entries and PoC repositories are given as counts only.

Public exploit evidence
SourceKindDate
Proof-of-concept repository on GitHubstars:02026-02-18

Research context

For pentesters and researchers: attack profile, score disagreement, timeline, patch commits, credits, variant and chain candidates, bug bounty scope. All derived from existing data; no exploit code.

Timeline

From publication to today: proof of concept, Metasploit module, CISA KEV and fix record. Dates are as reported by the sources.

  1. Published
  2. First PoC+33 d
  3. TodayNov 13, 2026+301 d

Credits

All researchers

Finders, reporters and analysts named in the CNA record. Click a name for that researcher’s other records.

Variant candidates

Same product, same weakness class, within 18 months. If the patch missed the root cause, the sibling bug is here.

  • CVE-2025-152815 days apartwordexp with WRDE_REUSE and WRDE_APPEND may return uninitialized memory
    30Monitor

Not on record for this CVE: EPSS history · patch commit or PR link · public bounty program.

Technical details

Attack conditions

  • Anyone who can reach it over the internet can trigger it.
  • No account or password is required.
  • No user action is required.
  • No special conditions are required; it is repeatable.

If successful

Confidentiality
high · data can be read
Integrity
none
Availability
none
Attack vector
Network
Attack complexity
Low
Privileges required
None
User interaction
None
Scope
Unchanged
Confidentiality impact
High
Integrity impact
None
Availability impact
None

Weakness class (CWE)

CWE-908 · Use of Uninitialized Resource

CVSS vector

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N

nvd-secondary

Attack context

MITRE CAPEC attack patterns and ATT&CK techniques for this weakness class (CWE). A starting point for detection rules and threat hunting.

MITRE has no CAPEC/ATT&CK mapping for this CWE.

References

Show all references (1 more)

Vendor advisories and official records. Exploit/PoC links are deliberately left out.

All records