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NVD / CVE Program· CNA VulDB

CVE-2026-91780: GNU Binutils elflink.c elf_link_add_object_symbols null pointer dereference

Noroxi assessment

Priority: Monitor (action score 7/100)

  • The sources we track (CISA KEV, Exploit-DB, Metasploit, Nuclei, GitHub) show no public exploit code or exploitation in the wild.
  • Probability of exploitation in the next 30 days: 0.17% (FIRST EPSS).
  • Someone with local access to the system can trigger it. A low-privileged account is enough. No user action is required. No special conditions are required; it is repeatable.
  • Fixed version: azl3 binutils 2.41-13 on Azure Linux 3.0 Release Notes; azl3 binutils 2.41-14 on Azure Linux 3.0 Release Notes.
  • Severity is disputed: the assigning authority (CNA) scores it 4.8, NVD 1.9.

Low priority for now. Upgrade to azl3 binutils 2.41-13 on Azure Linux 3.0 Release Notes; azl3 binutils 2.41-14 on Azure Linux 3.0 Release Notes 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

A weakness has been identified in GNU Binutils 2.47. This impacts the function elf_link_add_object_symbols of the file bfd/elflink.c. Executing a manipulation can lead to null pointer dereference. The attack needs to be launched locally. The exploit has been made available to the public and could be used for attacks. The project was informed of the problem early through a bug report but has not responded yet.

LowCVSS 1.9 · v4.0—No exploit Fix available
Published
Sep 15, 2026
Updated
Sep 16, 2026
EPSS
0.1% · 6th percentile

Report tools

JSON

Action score

7

Monitor

Low priority for now.

CVSS
7 / 40 · 1.9 / 10
CISA KEV
0 / 30 · Not listed
EPSS
0 / 30 · 0.1%

CISA SSVC decision

Exploitation
proof of concept
Automatable
no
Technical impact
partial

Vulnrichment: CISA's decision-tree inputs.

CNA vs NVD score

NVD
—
CNA · VulDB
4.8
NVD has not scored this yet; the score shown is the CNA’s.

CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/E:P

The score given by the assigning authority versus NVD’s independent score. A gap means the severity is contested.

Get told when this record changes

  • Not in KEV: no record of exploitation in the wild
  • No public exploit code on record
  • A fix has been released

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

Follow CVE-2026-91780

When you'll hear from us

  • when it enters CISA KEV
  • when exploit code appears or is weaponized
  • when the record is updated (including a fixed version)
  • 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
gnubinutils

Affected versions

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

  • gnu binutils2.47

Versions reported by the vendor

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

  • GNU Binutils

    • 2.47affected

Package-level exposure

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

EcosystemPackageAffected rangeFix
Debian:12binutilsfrom 0—
Red Hat:hummingbird:1binutilsbefore 0:2.46.1-1.2.hum10:2.46.1-1.2.hum1
Red Hat:hummingbird:1binutils-develbefore 0:2.46.1-1.2.hum10:2.46.1-1.2.hum1
Red Hat:hummingbird:1binutils-goldbefore 0:2.46.1-1.2.hum10:2.46.1-1.2.hum1
Red Hat:hummingbird:1binutils-gprofngbefore 0:2.46.1-1.2.hum10:2.46.1-1.2.hum1

Same product

gnu: all records

Other highest-scoring records for the same primary product.

  • CVE-2018-12699finish_stab in stabs.c in GNU Binutils 2.30 allows attackers to cause a denial of service (heap-based buffer overflow) or possibly have unsp
    40Plan
  • CVE-2017-7614elflink.c in the Binary File Descriptor (BFD) library (aka libbfd), as distributed in GNU Binutils 2.28, has a "member access within null po
    40Plan
  • CVE-2014-9939ihex.c in GNU Binutils before 2.26 contains a stack buffer overflow when printing bad bytes in Intel Hex objects.
    40Plan

Published before and after this one in the same product

  • ← EarlierCVE-2026-90831Sep 14, 2026 · GNU Binutils ELF String Table elf-strtab.c _bfd_elf_strtab_delref memory corruption
    7Monitor
  • ← EarlierCVE-2026-91779Sep 15, 2026 · GNU Binutils Eh Frame elf-eh-frame.c _bfd_elf_eh_frame_section_offset null pointer dereference
    7Monitor
  • Later →CVE-2026-91781Sep 15, 2026 · GNU Binutils ELF Section elf64-x86-64.c elf_x86_64_common_section_index null pointer dereference
    7Monitor

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 binutils 2.41-13 on Azure Linux 3.0Release NotesMicrosoft (MSRC)
azl3 binutils 2.41-14 on Azure Linux 3.0Release NotesMicrosoft (MSRC)
red hat:binutils0:2.46.1-1.2.hum1 · Red Hat:hummingbird:1Package registry (OSV)
red hat:binutils-devel0:2.46.1-1.2.hum1 · Red Hat:hummingbird:1Package registry (OSV)
red hat:binutils-gold0:2.46.1-1.2.hum1 · Red Hat:hummingbird:1Package registry (OSV)
red hat:binutils-gprofng0:2.46.1-1.2.hum1 · Red Hat:hummingbird:1Package registry (OSV)

Exploit status

No known public exploit

No public exploit has been observed yet. That doesn't mean you're safe, only that the bar is a little higher.

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.

No dated events beyond publication.

EPSS, last 120 days

FIRST EPSS daily score; only changes of 0.01 or more are recorded (step chart).

Patch and commit links

Commit, PR and diff links among the references. A starting point for patch-diffing and variant hunting; fixes, not exploits.

No commit or PR link among the references.

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-2026-917790 days apartGNU Binutils Eh Frame elf-eh-frame.c _bfd_elf_eh_frame_section_offset null pointer dereference
    7Monitor
  • CVE-2026-917810 days apartGNU Binutils ELF Section elf64-x86-64.c elf_x86_64_common_section_index null pointer dereference
    7Monitor
  • CVE-2026-917820 days apartGNU Binutils Dynamic Relocation Allocation elfxx-x86.c elf_x86_allocate_dynrelocs null pointer dereference
    7Monitor
  • CVE-2026-908021 days apartGNU Binutils ld libbfd.c bfd_putl64 null pointer dereference
    7Monitor
  • CVE-2026-908291 days apartGNU Binutils SHT_GROUP Section elf.c bfd_elf_set_group_contents null pointer dereference
    7Monitor
  • CVE-2026-908301 days apartGNU Binutils Section Merge merge.c _bfd_write_merged_section null pointer dereference
    7Monitor

Chain candidates

An authentication bypass and a privilege-requiring bug in the same product, published close together: combined they may become an unauthenticated path.

—

Bug bounty scope

No known public program.

Source: bounty-targets-data (public HackerOne, Bugcrowd, Intigriti, YesWeHack listings).

Technical details

Attack conditions

  • Someone with local access to the system can trigger it.
  • A low-privileged account is enough.
  • No user action is required.
  • No special conditions are required; it is repeatable.

If successful

Confidentiality
Integrity
Availability
Attack vector
Local
Attack complexity
Low
Privileges required
Low
User interaction
None
Scope
X

Weakness class (CWE)

CWE-404 · Improper Resource Shutdown or Release

CVSS vector

CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/E:P/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X

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.

Change log

  1. Fix✗ → ✓

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References

Show all references (6 more)

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

All records