Vulnerability-Lookup

RHSA-2026:82359

Vulnerability from csaf_redhat - Published: 2026-10-13 17:35 - Updated: 2026-10-14 02:39

Summary

Red Hat Security Advisory: Red Hat Hardened Images RPMs Security Update

Severity

Moderate

Notes

Topic: An update for Red Hat Hardened Images RPMs is now available.

Details: This update includes the following RPMs: binutils: * binutils-2.46.1-1.4.hum1 (aarch64, s390x, x86_64) * binutils-devel-2.46.1-1.4.hum1 (aarch64, s390x, x86_64) * binutils-gold-2.46.1-1.4.hum1 (aarch64, s390x, x86_64) * binutils-gprofng-2.46.1-1.4.hum1 (aarch64, x86_64) * binutils-2.46.1-1.4.hum1.src (src) Security Fix(es): binutils: * CVE-2026-19548

Terms of Use: This content is licensed under the Creative Commons Attribution 4.0 International License (https://creativecommons.org/licenses/by/4.0/). If you distribute this content, or a modified version of it, you must provide attribution to Red Hat Inc. and provide a link to the original.

CVE-2026-19548

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.

5.5 (Medium)


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

CWE-416 - Use After Free

Affected products

Fixed 12 products

Product	Version	Remediation
Unresolved product id: Red Hat Hardened Images:binutils-0:2.46.1-1.4.hum1@aarch64	—	Vendor Fix fix Workaround
Unresolved product id: Red Hat Hardened Images:binutils-0:2.46.1-1.4.hum1@s390x	—	Vendor Fix fix Workaround
Unresolved product id: Red Hat Hardened Images:binutils-0:2.46.1-1.4.hum1@src	—	Vendor Fix fix Workaround
Unresolved product id: Red Hat Hardened Images:binutils-0:2.46.1-1.4.hum1@x86_64	—	Vendor Fix fix Workaround
Unresolved product id: Red Hat Hardened Images:binutils-devel-0:2.46.1-1.4.hum1@aarch64	—	Vendor Fix fix Workaround
Unresolved product id: Red Hat Hardened Images:binutils-devel-0:2.46.1-1.4.hum1@s390x	—	Vendor Fix fix Workaround
Unresolved product id: Red Hat Hardened Images:binutils-devel-0:2.46.1-1.4.hum1@x86_64	—	Vendor Fix fix Workaround
Unresolved product id: Red Hat Hardened Images:binutils-gold-0:2.46.1-1.4.hum1@aarch64	—	Vendor Fix fix Workaround
Unresolved product id: Red Hat Hardened Images:binutils-gold-0:2.46.1-1.4.hum1@s390x	—	Vendor Fix fix Workaround
Unresolved product id: Red Hat Hardened Images:binutils-gold-0:2.46.1-1.4.hum1@x86_64	—	Vendor Fix fix Workaround
Unresolved product id: Red Hat Hardened Images:binutils-gprofng-0:2.46.1-1.4.hum1@aarch64	—	Vendor Fix fix Workaround
Unresolved product id: Red Hat Hardened Images:binutils-gprofng-0:2.46.1-1.4.hum1@x86_64	—	Vendor Fix fix Workaround

Threats

Impact Moderate

References

9 references

URL	Category
https://access.redhat.com/errata/RHSA-2026:82359	self
https://access.redhat.com/security/cve/CVE-2026-19548	external
https://access.redhat.com/security/updates/classi…	external
https://images.redhat.com/	external
https://security.access.redhat.com/data/csaf/v2/a…	self
https://access.redhat.com/security/cve/CVE-2026-19548	self
https://bugzilla.redhat.com/show_bug.cgi?id=2507832	external
https://www.cve.org/CVERecord?id=CVE-2026-19548	external
https://nvd.nist.gov/vuln/detail/CVE-2026-19548	external

Acknowledgments

Individual Security Researcher (rigelyoung@icloud.com) Xuqing Yang

JSON

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  "vulnerabilities": [
    {
      "acknowledgments": [
        {
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          "organization": "Individual Security Researcher (rigelyoung@icloud.com)"
        }
      ],
      "cve": "CVE-2026-19548",
      "cwe": {
        "id": "CWE-416",
        "name": "Use After Free"
      },
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          "text": "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-\u003ethe_bfd-\u003emy_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:\n\n1. Line ~1442: accessing abfd-\u003emy_archive via bfd_usrdata(abfd-\u003emy_archive)\n2. Line ~1493: multiple accesses to abfd and abfd-\u003emy_archive in a conditional check and bfd_get_filename call\n3. Line ~1525: dereferencing the shallow copy orig_input.the_bfd-\u003emy_archive in trace/verbose logging\n\nThe vulnerability is triggered when LTO plugins are active (link_info.lto_plugin_active is true) and the input object has abfd-\u003emy_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.\n\nAn 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.\n\nThe attack surface is limited to build-time environments \u2014 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.",
          "title": "Vulnerability description"
        },
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          "category": "summary",
          "text": "binutils: binutils: Multiple Use-After-Free in add_archive_element via LTO plugin processing",
          "title": "Vulnerability summary"
        },
        {
          "category": "other",
          "text": "This Moderate severity use-after-free flaw in binutils affects Red Hat products where the GNU linker is used with Link-Time Optimization (LTO) plugins enabled, such as in development and CI/CD environments. Exploitation requires an attacker to introduce a specially crafted object or archive file into the build process, leading primarily to a denial of service due to a linker crash. Arbitrary code execution is theoretically possible but significantly hindered by existing system hardening measures.",
          "title": "Statement"
        },
        {
          "category": "general",
          "text": "The CVSS score(s) listed for this vulnerability do not reflect the associated product\u0027s status, and are included for informational purposes to better understand the severity of this vulnerability.",
          "title": "CVSS score applicability"
        }
      ],
      "product_status": {
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          "Red Hat Hardened Images:binutils-0:2.46.1-1.4.hum1@s390x",
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          "Red Hat Hardened Images:binutils-devel-0:2.46.1-1.4.hum1@x86_64",
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          "Red Hat Hardened Images:binutils-gprofng-0:2.46.1-1.4.hum1@x86_64"
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          "summary": "Canonical URL",
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          "summary": "RHBZ#2507832",
          "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2507832"
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        {
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          "summary": "https://www.cve.org/CVERecord?id=CVE-2026-19548",
          "url": "https://www.cve.org/CVERecord?id=CVE-2026-19548"
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          "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-19548"
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          "date": "2026-10-13T17:35:49+00:00",
          "details": "For details on how to apply this update, which includes the changes described in this advisory, refer to:\nhttps://images.redhat.com/",
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            "Red Hat Hardened Images:binutils-0:2.46.1-1.4.hum1@x86_64",
            "Red Hat Hardened Images:binutils-devel-0:2.46.1-1.4.hum1@aarch64",
            "Red Hat Hardened Images:binutils-devel-0:2.46.1-1.4.hum1@s390x",
            "Red Hat Hardened Images:binutils-devel-0:2.46.1-1.4.hum1@x86_64",
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          "restart_required": {
            "category": "none"
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          "url": "https://access.redhat.com/errata/RHSA-2026:82359"
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            "attackVector": "LOCAL",
            "availabilityImpact": "HIGH",
            "baseScore": 5.5,
            "baseSeverity": "MEDIUM",
            "confidentialityImpact": "NONE",
            "integrityImpact": "NONE",
            "privilegesRequired": "NONE",
            "scope": "UNCHANGED",
            "userInteraction": "REQUIRED",
            "vectorString": "CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H",
            "version": "3.1"
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          "products": [
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        }
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      "threats": [
        {
          "category": "impact",
          "details": "Moderate"
        }
      ],
      "title": "binutils: binutils: Multiple Use-After-Free in add_archive_element via LTO plugin processing"
    }
  ]
}

CVE-2026-19548 (GCVE-0-2026-19548)

Vulnerability from cvelistv5 – Published: 2026-08-12 15:51 – Updated: 2026-09-01 12:48

Title

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

Summary

Severity

5.5 (Medium)


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

SSVC

Exploitation: none Automatable: no Technical Impact: partial

CISA Coordinator · CISA-ADP (v2.0.3)

Decision recorded 2026-08-12 16:52 UTC

CWE

CWE-416 - Use After Free

Assigner

redhat redhat root Scorecard

References

2 references

URL	Tags
https://access.redhat.com/security/cve/CVE-2026-19548	vdb-entryx_refsource_REDHAT
https://bugzilla.redhat.com/show_bug.cgi?id=2507832	issue-trackingx_refsource_REDHAT

Impacted products

7 products

Vendor	Product	Version
Red Hat	Red Hat Enterprise Linux 10	cpe:/o:redhat:enterprise_linux:10
Red Hat	Red Hat Enterprise Linux 6	cpe:/o:redhat:enterprise_linux:6
Red Hat	Red Hat Enterprise Linux 7	cpe:/o:redhat:enterprise_linux:7
Red Hat	Red Hat Enterprise Linux 8	cpe:/o:redhat:enterprise_linux:8
Red Hat	Red Hat Enterprise Linux 9	cpe:/o:redhat:enterprise_linux:9
Red Hat	Red Hat Hardened Images	cpe:/a:redhat:hummingbird:1
Red Hat	Red Hat OpenShift Container Platform 4	cpe:/a:redhat:openshift:4

Date Public

2026-08-12 13:40

Credits

Red Hat would like to thank Xuqing Yang (Individual Security Researcher (rigelyoung@icloud.com)) for reporting this issue.

Show details on NVD website

JSON

To clipboard

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Sightings

Author	Source	Type	Date	Other

Nomenclature

Seen: The vulnerability was mentioned, discussed, or observed by the user.
Confirmed: The vulnerability has been validated from an analyst's perspective.
Published Proof of Concept: A public proof of concept is available for this vulnerability.
Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
Not confirmed: The user expressed doubt about the validity of the vulnerability.
Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.

The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base model, served locally by ML-Gateway. They have not been verified by an analyst and are provided for guidance only.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
Browse all ATT&CK techniques and the vulnerabilities related to each.

Related by attack behaviour

Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.

Action not permitted

RHSA-2026:82359

CVE-2026-19548 (GCVE-0-2026-19548)

Tags

Sightings

Nomenclature

Related by attack behaviour