Vulnerability-Lookup

RHSA-2026:43818

Vulnerability from csaf_redhat - Published: 2026-07-22 18:12 - Updated: 2026-09-21 23:39

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: libarchive: * bsdcat-3.8.8-3.1.hum1 (aarch64, x86_64) * bsdcpio-3.8.8-3.1.hum1 (aarch64, x86_64) * bsdtar-3.8.8-3.1.hum1 (aarch64, x86_64) * bsdunzip-3.8.8-3.1.hum1 (aarch64, x86_64) * libarchive-3.8.8-3.1.hum1 (aarch64, x86_64) * libarchive-devel-3.8.8-3.1.hum1 (aarch64, x86_64) * libarchive-3.8.8-3.1.hum1.src (src) Security Fix(es): libarchive: * CVE-2026-16517

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-2025-64031

A flaw was found in libarchive, a data archiving library. This vulnerability, a heap-based buffer overflow in the gzip writer, occurs when handling the `original-filename` field. While exploitation requires a specific, marginally plausible scenario where an untrusted source provides the filename, a successful attack could lead to a denial of service (DoS).

4.7 (Medium)


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

CWE-120 - Buffer Copy without Checking Size of Input ('Classic Buffer Overflow')

Affected products

Fixed 13 products

Product	Version	Remediation
Unresolved product id: Red Hat Hardened Images:bsdcat-0:3.8.8-3.1.hum1@aarch64	—	Vendor Fix fix
Unresolved product id: Red Hat Hardened Images:bsdcat-0:3.8.8-3.1.hum1@x86_64	—	Vendor Fix fix
Unresolved product id: Red Hat Hardened Images:bsdcpio-0:3.8.8-3.1.hum1@aarch64	—	Vendor Fix fix
Unresolved product id: Red Hat Hardened Images:bsdcpio-0:3.8.8-3.1.hum1@x86_64	—	Vendor Fix fix
Unresolved product id: Red Hat Hardened Images:bsdtar-0:3.8.8-3.1.hum1@aarch64	—	Vendor Fix fix
Unresolved product id: Red Hat Hardened Images:bsdtar-0:3.8.8-3.1.hum1@x86_64	—	Vendor Fix fix
Unresolved product id: Red Hat Hardened Images:bsdunzip-0:3.8.8-3.1.hum1@aarch64	—	Vendor Fix fix
Unresolved product id: Red Hat Hardened Images:bsdunzip-0:3.8.8-3.1.hum1@x86_64	—	Vendor Fix fix
Unresolved product id: Red Hat Hardened Images:libarchive-0:3.8.8-3.1.hum1@aarch64	—	Vendor Fix fix
Unresolved product id: Red Hat Hardened Images:libarchive-0:3.8.8-3.1.hum1@src	—	Vendor Fix fix
Unresolved product id: Red Hat Hardened Images:libarchive-0:3.8.8-3.1.hum1@x86_64	—	Vendor Fix fix
Unresolved product id: Red Hat Hardened Images:libarchive-devel-0:3.8.8-3.1.hum1@aarch64	—	Vendor Fix fix
Unresolved product id: Red Hat Hardened Images:libarchive-devel-0:3.8.8-3.1.hum1@x86_64	—	Vendor Fix fix

Threats

Impact Moderate

CVE-2026-16517

A signed integer overflow vulnerability was found in libarchive's ZIP writer. In the archive_write_zip_header function in archive_write_set_format_zip.c, when ZIP encryption is enabled and the entry file size is close to INT64_MAX, the addition of the encryption overhead to the entry size overflows int64_t, resulting in undefined behavior. This could lead to incorrect Zip64 extension decisions or potential memory corruption.

2.9 (Low)


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

CWE-190 - Integer Overflow or Wraparound

Affected products

Fixed 13 products, the same list as for CVE-2025-64031

Threats

Impact Low

References

19 references

URL	Category
https://access.redhat.com/errata/RHSA-2026:43818	self
https://access.redhat.com/security/cve/CVE-2026-16517	external
https://access.redhat.com/security/updates/classi…	external
https://images.redhat.com/	external
https://access.redhat.com/security/cve/CVE-2025-64031	external
https://security.access.redhat.com/data/csaf/v2/a…	self
https://access.redhat.com/security/cve/CVE-2025-64031	self
https://bugzilla.redhat.com/show_bug.cgi?id=2532805	external
https://www.cve.org/CVERecord?id=CVE-2025-64031	external
https://nvd.nist.gov/vuln/detail/CVE-2025-64031	external
https://gist.github.com/ttuurrnn/1365a4a9b1c3d582…	external
https://github.com/libarchive/libarchive/blob/mas…	external
https://github.com/libarchive/libarchive/pull/2734	external
https://github.com/libarchive/libarchive/pull/273…	external
https://github.com/libarchive/libarchive/pull/273…	external
https://access.redhat.com/security/cve/CVE-2026-16517	self
https://bugzilla.redhat.com/show_bug.cgi?id=2505492	external
https://www.cve.org/CVERecord?id=CVE-2026-16517	external
https://nvd.nist.gov/vuln/detail/CVE-2026-16517	external

Acknowledgments

shaohan.X

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          "category": "external",
          "summary": "https://nvd.nist.gov/vuln/detail/CVE-2025-64031",
          "url": "https://nvd.nist.gov/vuln/detail/CVE-2025-64031"
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          "category": "vendor_fix",
          "date": "2026-07-22T18:12:39+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:bsdtar-0:3.8.8-3.1.hum1@aarch64",
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          "url": "https://access.redhat.com/errata/RHSA-2026:43818"
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            "vectorString": "CVSS:3.1/AV:L/AC:H/PR:N/UI:R/S:U/C:N/I:N/A:H",
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            "Red Hat Hardened Images:bsdtar-0:3.8.8-3.1.hum1@aarch64",
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            "Red Hat Hardened Images:libarchive-devel-0:3.8.8-3.1.hum1@aarch64",
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          "details": "Moderate"
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      "title": "libarchive: libarchive: Denial of Service via heap-based buffer overflow in gzip writer"
    },
    {
      "acknowledgments": [
        {
          "names": [
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          "system_name": "Red Hat Bugzilla ID",
          "text": "2505492"
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        {
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          "text": "A signed integer overflow vulnerability was found in libarchive\u0027s ZIP writer. In the archive_write_zip_header function in archive_write_set_format_zip.c, when ZIP encryption is enabled and the entry file size is close to INT64_MAX, the addition of the encryption overhead to the entry size overflows int64_t, resulting in undefined behavior. This could lead to incorrect Zip64 extension decisions or potential memory corruption.",
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          "text": "libarchive: libarchive: Signed Integer Overflow in archive_write_zip_header",
          "title": "Vulnerability summary"
        },
        {
          "category": "other",
          "text": "Red Hat Product Security rates this issue as Low severity. The vulnerability is in the ZIP write path only and requires both ZIP encryption to be enabled and a file size near INT64_MAX, making real-world exploitation highly unlikely. The resulting undefined behavior could theoretically cause incorrect Zip64 extension decisions or a crash, but the conditions are too contrived for practical exploitation.",
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        {
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          "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"
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            "Red Hat Hardened Images:bsdcpio-0:3.8.8-3.1.hum1@aarch64",
            "Red Hat Hardened Images:bsdcpio-0:3.8.8-3.1.hum1@x86_64",
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            "Red Hat Hardened Images:bsdunzip-0:3.8.8-3.1.hum1@aarch64",
            "Red Hat Hardened Images:bsdunzip-0:3.8.8-3.1.hum1@x86_64",
            "Red Hat Hardened Images:libarchive-0:3.8.8-3.1.hum1@aarch64",
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            "Red Hat Hardened Images:libarchive-0:3.8.8-3.1.hum1@x86_64",
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            "Red Hat Hardened Images:libarchive-devel-0:3.8.8-3.1.hum1@x86_64"
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      "threats": [
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          "details": "Low"
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      ],
      "title": "libarchive: libarchive: Signed Integer Overflow in archive_write_zip_header"
    }
  ]
}

CVE-2025-64031 (GCVE-0-2025-64031)

Vulnerability from cvelistv5 – Published: 2026-09-14 00:00 – Updated: 2026-09-16 14:22

Summary

libarchive 3.8.x before 3.8.2 has a strcpy heap-based buffer overflow in the gzip writer via the original-filename field to archive_compressor_gzip_open in archive_write_add_filter_gzip.c, aka GHSA-92wx-p669-8gr9. This relates to bsdtar. Exploitation envisions a marginally plausible scenario in which original-filename is obtained from an untrusted party. (original-filename is not derived from the input data.)

Severity

2.5 (Low)


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

SSVC

Exploitation: poc Automatable: no Technical Impact: partial

CISA Coordinator · CISA-ADP (v2.0.3)

Decision recorded 2026-09-16 14:22 UTC

CWE

CWE-122 - Heap-based Buffer Overflow

Assigner

mitre mitre root

References

5 references

URL	Tags
https://github.com/libarchive/libarchive/pull/2734
https://github.com/libarchive/libarchive/pull/273…
https://github.com/libarchive/libarchive/pull/273…
https://github.com/libarchive/libarchive/blob/mas…
https://gist.github.com/ttuurrnn/1365a4a9b1c3d582…

Impacted products

1 product

Vendor	Product	Version
libarchive	libarchive	Affected: 3.8.0 , < 3.8.2 (semver) cpe:2.3:a:libarchive:libarchive::::::::

Show details on NVD website

JSON

To clipboard

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CVE-2026-16517 (GCVE-0-2026-16517)

Vulnerability from cvelistv5 – Published: 2026-07-21 22:41 – Updated: 2026-09-21 23:39

Title

Libarchive: libarchive: signed integer overflow in archive_write_zip_header

Summary

Severity

2.9 (Low)


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

SSVC

Exploitation: none Automatable: no Technical Impact: partial

CISA Coordinator · CISA-ADP (v2.0.3)

Decision recorded 2026-07-22 12:44 UTC

CWE

CWE-190 - Integer Overflow or Wraparound

Assigner

redhat redhat root

References

4 references

URL	Tags
https://access.redhat.com/errata/RHSA-2026:43818	vendor-advisoryx_refsource_REDHAT
https://access.redhat.com/errata/RHSA-2026:69553	vendor-advisoryx_refsource_REDHAT
https://access.redhat.com/security/cve/CVE-2026-16517	vdb-entryx_refsource_REDHAT
https://bugzilla.redhat.com/show_bug.cgi?id=2505492	issue-trackingx_refsource_REDHAT

Impacted products

7 products

Vendor	Product	Version
Red Hat	Red Hat Enterprise Linux 10	Unaffected: 0:3.7.7-11.el10_2 , < * (rpm) cpe:/o:redhat:enterprise_linux:10.2
Red Hat	Red Hat Hardened Images	Unaffected: 3.8.8-3.1.hum1 , < * (rpm) cpe:/a:redhat:hummingbird:1
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 OpenShift Container Platform 4	cpe:/a:redhat:openshift:4

Date Public

2026-07-03 00:00

Credits

Red Hat would like to thank shaohan.X 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-2026:43818

CVE-2025-64031 (GCVE-0-2025-64031)

CVE-2026-16517 (GCVE-0-2026-16517)

Tags

Sightings

Nomenclature

Related by attack behaviour