Vulnerability-Lookup

RHSA-2026:77775

Vulnerability from csaf_redhat - Published: 2026-10-07 19:19 - Updated: 2026-10-17 16:50

Summary

Red Hat Security Advisory: Red Hat Hardened Images RPMs bug fix and enhancement update

Severity

Low

Notes

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

Details: This update includes the following RPMs: libarchive: * bsdcat-3.8.9-2.1.hum1 (aarch64, s390x, x86_64) * bsdcpio-3.8.9-2.1.hum1 (aarch64, s390x, x86_64) * bsdtar-3.8.9-2.1.hum1 (aarch64, s390x, x86_64) * bsdunzip-3.8.9-2.1.hum1 (aarch64, s390x, x86_64) * libarchive-3.8.9-2.1.hum1 (aarch64, s390x, x86_64) * libarchive-devel-3.8.9-2.1.hum1 (aarch64, s390x, x86_64) * libarchive-3.8.9-2.1.hum1.src (src)

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-2026-17591

A flaw was found in libarchive. An attacker can cause a Denial of Service (DoS) or potential information disclosure due to a use-after-free vulnerability, which occurs when a program reads memory that has already been released. This issue arises when the archive_entry_copy_mac_metadata() function deallocates an internal buffer before completing a data copy. An attacker who can supply input to an application utilizing this function can trigger the flaw to crash the application or read uninitialized memory data.

3.6 (Low)


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

CWE-416 - Use After Free

Affected products

Fixed 19 products

Product	Version	Remediation
Unresolved product id: Red Hat Hardened Images:bsdcat-0:3.8.9-2.1.hum1@aarch64	—	Vendor Fix fix
Unresolved product id: Red Hat Hardened Images:bsdcat-0:3.8.9-2.1.hum1@s390x	—	Vendor Fix fix
Unresolved product id: Red Hat Hardened Images:bsdcat-0:3.8.9-2.1.hum1@x86_64	—	Vendor Fix fix
Unresolved product id: Red Hat Hardened Images:bsdcpio-0:3.8.9-2.1.hum1@aarch64	—	Vendor Fix fix
Unresolved product id: Red Hat Hardened Images:bsdcpio-0:3.8.9-2.1.hum1@s390x	—	Vendor Fix fix
Unresolved product id: Red Hat Hardened Images:bsdcpio-0:3.8.9-2.1.hum1@x86_64	—	Vendor Fix fix
Unresolved product id: Red Hat Hardened Images:bsdtar-0:3.8.9-2.1.hum1@aarch64	—	Vendor Fix fix
Unresolved product id: Red Hat Hardened Images:bsdtar-0:3.8.9-2.1.hum1@s390x	—	Vendor Fix fix
Unresolved product id: Red Hat Hardened Images:bsdtar-0:3.8.9-2.1.hum1@x86_64	—	Vendor Fix fix
Unresolved product id: Red Hat Hardened Images:bsdunzip-0:3.8.9-2.1.hum1@aarch64	—	Vendor Fix fix
Unresolved product id: Red Hat Hardened Images:bsdunzip-0:3.8.9-2.1.hum1@s390x	—	Vendor Fix fix
Unresolved product id: Red Hat Hardened Images:bsdunzip-0:3.8.9-2.1.hum1@x86_64	—	Vendor Fix fix
Unresolved product id: Red Hat Hardened Images:libarchive-0:3.8.9-2.1.hum1@aarch64	—	Vendor Fix fix
Unresolved product id: Red Hat Hardened Images:libarchive-0:3.8.9-2.1.hum1@s390x	—	Vendor Fix fix
Unresolved product id: Red Hat Hardened Images:libarchive-0:3.8.9-2.1.hum1@src	—	Vendor Fix fix
Unresolved product id: Red Hat Hardened Images:libarchive-0:3.8.9-2.1.hum1@x86_64	—	Vendor Fix fix
Unresolved product id: Red Hat Hardened Images:libarchive-devel-0:3.8.9-2.1.hum1@aarch64	—	Vendor Fix fix
Unresolved product id: Red Hat Hardened Images:libarchive-devel-0:3.8.9-2.1.hum1@s390x	—	Vendor Fix fix
Unresolved product id: Red Hat Hardened Images:libarchive-devel-0:3.8.9-2.1.hum1@x86_64	—	Vendor Fix fix

Threats

Impact Low

References

10 references

URL	Category
https://access.redhat.com/errata/RHSA-2026:77775	self
https://images.redhat.com/	external
https://access.redhat.com/security/cve/CVE-2026-17591	external
https://access.redhat.com/security/updates/classi…	external
https://security.access.redhat.com/data/csaf/v2/a…	self
https://access.redhat.com/security/cve/CVE-2026-17591	self
https://bugzilla.redhat.com/show_bug.cgi?id=2554209	external
https://www.cve.org/CVERecord?id=CVE-2026-17591	external
https://nvd.nist.gov/vuln/detail/CVE-2026-17591	external
https://github.com/libarchive/libarchive/pull/3318	external

Acknowledgments

shaohan.X

JSON

To clipboard

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    {
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        {
          "names": [
            "shaohan.X"
          ]
        }
      ],
      "cve": "CVE-2026-17591",
      "cwe": {
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        "name": "Use After Free"
      },
      "discovery_date": "2026-10-16T16:48:43.437000+00:00",
      "ids": [
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          "system_name": "Red Hat Bugzilla ID",
          "text": "2554209"
        }
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      "notes": [
        {
          "category": "description",
          "text": "A flaw was found in libarchive. An attacker can cause a Denial of Service (DoS) or potential information disclosure due to a use-after-free vulnerability, which occurs when a program reads memory that has already been released. This issue arises when the archive_entry_copy_mac_metadata() function deallocates an internal buffer before completing a data copy. An attacker who can supply input to an application utilizing this function can trigger the flaw to crash the application or read uninitialized memory data.",
          "title": "Vulnerability description"
        },
        {
          "category": "summary",
          "text": "libarchive: libarchive: use-after-free via aliased Mac metadata copy",
          "title": "Vulnerability summary"
        },
        {
          "category": "other",
          "text": "This vulnerability is rated as Low severity for Red Hat because successful exploitation requires highly specific application-level API usage where an archive entry\u0027s metadata buffer is explicitly copied onto itself. Standard command-line archive utilities and typical library consumers do not perform this aliased operation during regular archive extraction or creation. Consequently, the flaw presents minimal exposure in standard Red Hat Enterprise Linux environments, with potential impact limited to localized crashes or minor memory leakage in custom applications invoking the affected API pattern.",
          "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"
        }
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          "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2554209"
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          "summary": "https://www.cve.org/CVERecord?id=CVE-2026-17591",
          "url": "https://www.cve.org/CVERecord?id=CVE-2026-17591"
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        {
          "category": "external",
          "summary": "https://nvd.nist.gov/vuln/detail/CVE-2026-17591",
          "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-17591"
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      "remediations": [
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          "category": "vendor_fix",
          "date": "2026-10-07T19:19:41+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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            "userInteraction": "REQUIRED",
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            "Red Hat Hardened Images:bsdunzip-0:3.8.9-2.1.hum1@x86_64",
            "Red Hat Hardened Images:libarchive-0:3.8.9-2.1.hum1@aarch64",
            "Red Hat Hardened Images:libarchive-0:3.8.9-2.1.hum1@s390x",
            "Red Hat Hardened Images:libarchive-0:3.8.9-2.1.hum1@src",
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            "Red Hat Hardened Images:libarchive-devel-0:3.8.9-2.1.hum1@aarch64",
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            "Red Hat Hardened Images:libarchive-devel-0:3.8.9-2.1.hum1@x86_64"
          ]
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      ],
      "threats": [
        {
          "category": "impact",
          "details": "Low"
        }
      ],
      "title": "libarchive: libarchive: use-after-free via aliased Mac metadata copy"
    }
  ]
}

CVE-2026-17591 (GCVE-0-2026-17591)

Vulnerability from cvelistv5 – Published: 2026-10-16 22:03 – Updated: 2026-10-17 16:50

Title

Libarchive: libarchive: use-after-free via aliased mac metadata copy

Summary

Severity

3.6 (Low)


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

CWE

CWE-416 - Use After Free

Assigner

redhat CNA under the redhat root

CNA scorecard B 82/100 over 1030 records in the last 180 days details

References

4 references

URL	Tags
https://access.redhat.com/errata/RHSA-2026:77775	vendor-advisoryx_refsource_REDHAT
https://access.redhat.com/security/cve/CVE-2026-17591	vdb-entryx_refsource_REDHAT
https://bugzilla.redhat.com/show_bug.cgi?id=2554209	issue-trackingx_refsource_REDHAT
https://github.com/libarchive/libarchive/pull/3318

Impacted products

6 products

Vendor	Product	Version
Red Hat	Red Hat Hardened Images	Unaffected: 3.8.9-2.1.hum1 , < * (rpm) cpe:/a:redhat:hummingbird:1
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

Date Public

2026-07-20 12:00

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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          "lang": "en",
          "time": "2026-07-20T12:00:00.000Z",
          "value": "Made public."
        }
      ],
      "title": "Libarchive: libarchive: use-after-free via aliased mac metadata copy",
      "x_generator": {
        "engine": "cvelib 1.8.0"
      },
      "x_redhatCweChain": "CWE-416: Use After Free"
    }
  },
  "cveMetadata": {
    "assignerOrgId": "53f830b8-0a3f-465b-8143-3b8a9948e749",
    "assignerShortName": "redhat",
    "cveId": "CVE-2026-17591",
    "datePublished": "2026-10-16T22:03:40.603Z",
    "dateReserved": "2026-07-27T16:15:33.820Z",
    "dateUpdated": "2026-10-17T16:50:55.660Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}

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.

Vulnerability timeline

Sightings and recorded dates, grouped by day · UTC

Order JSON

Publication & reservation Sightings KEV catalogs Other timestamps

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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.

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