DEBIAN-CVE-2026-19548

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Source
https://security-tracker.debian.org/tracker/CVE-2026-19548
Import Source
https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-19548.json
JSON Data
https://api.osv.dev/v1/vulns/DEBIAN-CVE-2026-19548
Upstream
  • CVE-2026-19548
Published
2026-08-12T16:16:55Z
Modified
2026-09-14T17:02:50Z
Severity
  • 5.5 (Medium) CVSS_V3 - CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H CVSS Calculator
Summary
[none]
Details

Multiple Use-After-Free vulnerabilities were found in the add_archive_element function in ld/ldmain.c of the GNU linker (ld), a component of binutils. The root cause is that plugin_maybe_claim() in ld/plugin.c frees the original BFD object via bfd_close/_bfd_delete_bfd when entry->the_bfd->my_archive == NULL, but the caller retains both the original abfd parameter and a shallow copy (orig_input.the_bfd) as dangling pointers. These dangling pointers are subsequently dereferenced at three distinct locations in add_archive_element: 1. Line ~1442: accessing abfd->my_archive via bfd_usrdata(abfd->my_archive) 2. Line ~1493: multiple accesses to abfd and abfd->my_archive in a conditional check and bfd_get_filename call 3. Line ~1525: dereferencing the shallow copy orig_input.the_bfd->my_archive in trace/verbose logging The vulnerability is triggered when LTO plugins are active (link_info.lto_plugin_active is true) and the input object has abfd->my_archive == NULL, which is a valid state for standalone object files. Red Hat builds binutils with --enable-plugins and --enable-lto, confirming the vulnerable code path is compiled in and reachable. An attacker who can supply a crafted object or archive file to a build process using LTO-enabled linking could exploit this flaw to cause a denial of service (linker crash via segmentation fault). Arbitrary code execution is theoretically possible through heap manipulation but is substantially mitigated by hardening measures including stack protector, FORTIFY_SOURCE, ASLR, and PIE. The attack surface is limited to build-time environments — the linker is a development tool not exposed in production runtime. The most realistic exploitation scenario is a supply chain attack introducing a crafted object file as a build dependency in CI/CD pipelines or development environments.

References

Affected packages

Debian:12 / binutils

Package

Name
binutils
Purl
pkg:deb/debian/binutils?arch=source&distro=bookworm

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0 Unknown introduced version / All previous versions are affected

Affected versions

2.*
2.40-2
2.40.50.20230111-1
2.40.50.20230215-1
2.40.50.20230501-1
2.40.50.20230510-1
2.40.50.20230602-1
2.40.50.20230611-1
2.40.50.20230611-2
2.40.50.20230622-1
2.40.50.20230625-1
2.40.50.20230630-1
2.40.90.20230705-1
2.40.90.20230714-1
2.40.90.20230714-2
2.40.90.20230720-1
2.40.90.20230729-1
2.40.90.20230729-2
2.41-1
2.41-2
2.41-3
2.41-4
2.41-5
2.41-6
2.41-7
2.41.50.20230731-1
2.41.50.20230803-1
2.41.50.20230905-1
2.41.50.20231010-1
2.41.50.20231101-1
2.41.50.20231125-1
2.41.50.20231202-1
2.41.50.20231206-1
2.41.50.20231214-1
2.41.50.20231227-1
2.41.90.20240115-1
2.41.90.20240122-1
2.42-1
2.42-2
2.42-2+hurd.1
2.42-3
2.42-4
2.42.50.20240614-1
2.42.50.20240618-1
2.42.50.20240625-1
2.42.50.20240710-1
2.42.90.20240720-1
2.42.90.20240720-2
2.43-1
2.43-2
2.43.1-1
2.43.1-2
2.43.1-3
2.43.1-4
2.43.1-5
2.43.50.20240817-1
2.43.50.20240909-1
2.43.50.20241004-1
2.43.50.20241112-1
2.43.50.20241126-1
2.43.50.20241126-2
2.43.50.20241126-3
2.43.50.20241204-1
2.43.50.20241204-2
2.43.50.20241210-1
2.43.50.20241215-1
2.43.50.20241221-1
2.43.50.20241230-1
2.43.50.20250108-1
2.43.90.20250122-1
2.43.90.20250122-2
2.43.90.20250127-1
2.43.90.20250202-1
2.44-1
2.44-2
2.44-3
2.44.50.20250201-1
2.44.50.20250207-1
2.44.50.20250218-1
2.44.50.20250218-2
2.44.50.20250309-1
2.44.50.20250405-1
2.44.50.20250502-1
2.44.50.20250520-1
2.44.50.20250528-1
2.44.50.20250707-1
2.44.90.20250719-1
2.45-1
2.45-2
2.45-3
2.45-4
2.45-5
2.45-6
2.45-7
2.45-8
2.45.50.20250813-1
2.45.50.20250903-1
2.45.50.20251005-1
2.45.50.20251023-1
2.45.50.20251023-2
2.45.50.20251122-1
2.45.50.20251125-1
2.45.50.20251201-1
2.45.50.20251209-1
2.45.50.20260116-1
2.45.50.20260119-1
2.45.90.20260125-1
2.45.90.20260201-1
2.46-1
2.46-2
2.46-3
2.46.50.20260216-1
2.46.50.20260509-1
2.46.50.20260519-1
2.46.50.20260608-1
2.46.50.20260617-1
2.46.90.20260712-1
2.47-1
2.47-2
2.47-3
2.47-4
2.47-5
2.47-6
2.47.50.20260813-1
2.47.50.20260813-2
2.47.50.20260813-3
2.47.50.20260901-1

Ecosystem specific 

{
    "urgency": "unimportant"
}

Database specific

source 
"https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-19548.json"

Debian:13 / binutils

Package

Name
binutils
Purl
pkg:deb/debian/binutils?arch=source&distro=trixie

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0 Unknown introduced version / All previous versions are affected

Affected versions

2.*
2.44-3
2.44.50.20250201-1
2.44.50.20250207-1
2.44.50.20250218-1
2.44.50.20250218-2
2.44.50.20250309-1
2.44.50.20250405-1
2.44.50.20250502-1
2.44.50.20250520-1
2.44.50.20250528-1
2.44.50.20250707-1
2.44.90.20250719-1
2.45-1
2.45-2
2.45-3
2.45-4
2.45-5
2.45-6
2.45-7
2.45-8
2.45.50.20250813-1
2.45.50.20250903-1
2.45.50.20251005-1
2.45.50.20251023-1
2.45.50.20251023-2
2.45.50.20251122-1
2.45.50.20251125-1
2.45.50.20251201-1
2.45.50.20251209-1
2.45.50.20260116-1
2.45.50.20260119-1
2.45.90.20260125-1
2.45.90.20260201-1
2.46-1
2.46-2
2.46-3
2.46.50.20260216-1
2.46.50.20260509-1
2.46.50.20260519-1
2.46.50.20260608-1
2.46.50.20260617-1
2.46.90.20260712-1
2.47-1
2.47-2
2.47-3
2.47-4
2.47-5
2.47-6
2.47.50.20260813-1
2.47.50.20260813-2
2.47.50.20260813-3
2.47.50.20260901-1

Ecosystem specific 

{
    "urgency": "unimportant"
}

Database specific

source 
"https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-19548.json"

Debian:14 / binutils

Package

Name
binutils
Purl
pkg:deb/debian/binutils?arch=source&distro=forky

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0 Unknown introduced version / All previous versions are affected

Affected versions

2.*
2.44-3
2.44.50.20250201-1
2.44.50.20250207-1
2.44.50.20250218-1
2.44.50.20250218-2
2.44.50.20250309-1
2.44.50.20250405-1
2.44.50.20250502-1
2.44.50.20250520-1
2.44.50.20250528-1
2.44.50.20250707-1
2.44.90.20250719-1
2.45-1
2.45-2
2.45-3
2.45-4
2.45-5
2.45-6
2.45-7
2.45-8
2.45.50.20250813-1
2.45.50.20250903-1
2.45.50.20251005-1
2.45.50.20251023-1
2.45.50.20251023-2
2.45.50.20251122-1
2.45.50.20251125-1
2.45.50.20251201-1
2.45.50.20251209-1
2.45.50.20260116-1
2.45.50.20260119-1
2.45.90.20260125-1
2.45.90.20260201-1
2.46-1
2.46-2
2.46-3
2.46.50.20260216-1
2.46.50.20260509-1
2.46.50.20260519-1
2.46.50.20260608-1
2.46.50.20260617-1
2.46.90.20260712-1
2.47-1
2.47-2
2.47-3
2.47-4
2.47-5
2.47-6
2.47.50.20260813-1
2.47.50.20260813-2
2.47.50.20260813-3
2.47.50.20260901-1

Ecosystem specific 

{
    "urgency": "unimportant"
}

Database specific

source 
"https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-19548.json"