CVE-2026-19548

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Status do registro: Publicado
Ano do identificador (não é o ano de publicação): 2026
Publicação na fonte: 12 de ago. de 2026
Atualização na fonte: 14 de out. de 2026
Importado pelo cveboard: 24 de out. de 2026
Snapshot da fonte: cve_2026-10-24_midnight_baseline · 24 de out. de 2026

Texto da CNA em inglês

Binutils: binutils: multiple use-after-free in add_archive_element via lto plugin processing

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.

Fatos de produtos e versões por escopo

Dados de correção desconhecidos; nenhuma versão corrigida é deduzida aqui. Dados ausentes não comprovam ausência de correção.

Exploração desconhecida; este catálogo não avalia exploração.

Red Hat Hardened Images

Fornecedor: Red Hat
Produto: Red Hat Hardened Images
Plataformas: Desconhecido
Status padrão: affected
Pacote: binutils-main
Coleção do pacote: https://catalog.redhat.com/software/containers/

Red Hat Hardened Images · Fatos de produtos e versões por escopo
Versão (version)	Status (status)	Esquema de versões (versionType)	Fim exclusivo (lessThan)	Fim inclusivo (lessThanOrEqual)	Mudanças de status (at → status)
2.46.1-1.4.hum1	`unaffected`	rpm	*	Indisponível	Nenhuma listada