Vulnerability-Lookup

OPENSUSE-SU-2026:11092-1

Vulnerability from csaf_opensuse - Published: 2026-06-22 00:00 - Updated: 2026-09-17 17:10

Summary

libtar-1.2.20-3.1 on GA media

Severity

Moderate

Notes

Title of the patch: libtar-1.2.20-3.1 on GA media

Description of the patch: These are all security issues fixed in the libtar-1.2.20-3.1 package on the GA media of openSUSE Tumbleweed.

Patchnames: openSUSE-Tumbleweed-2026-11092

CVE-2021-33640

9.8 (Critical)


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

Affected products

Recommended 12 products

Product	Version	Remediation
Unresolved product id: openSUSE Tumbleweed:libtar-0:1.2.20-3.1.aarch64	—	Vendor Fix
Unresolved product id: openSUSE Tumbleweed:libtar-0:1.2.20-3.1.ppc64le	—	Vendor Fix
Unresolved product id: openSUSE Tumbleweed:libtar-0:1.2.20-3.1.s390x	—	Vendor Fix
Unresolved product id: openSUSE Tumbleweed:libtar-0:1.2.20-3.1.x86_64	—	Vendor Fix
Unresolved product id: openSUSE Tumbleweed:libtar-devel-0:1.2.20-3.1.aarch64	—	Vendor Fix
Unresolved product id: openSUSE Tumbleweed:libtar-devel-0:1.2.20-3.1.ppc64le	—	Vendor Fix
Unresolved product id: openSUSE Tumbleweed:libtar-devel-0:1.2.20-3.1.s390x	—	Vendor Fix
Unresolved product id: openSUSE Tumbleweed:libtar-devel-0:1.2.20-3.1.x86_64	—	Vendor Fix
Unresolved product id: openSUSE Tumbleweed:libtar1-0:1.2.20-3.1.aarch64	—	Vendor Fix
Unresolved product id: openSUSE Tumbleweed:libtar1-0:1.2.20-3.1.ppc64le	—	Vendor Fix
Unresolved product id: openSUSE Tumbleweed:libtar1-0:1.2.20-3.1.s390x	—	Vendor Fix
Unresolved product id: openSUSE Tumbleweed:libtar1-0:1.2.20-3.1.x86_64	—	Vendor Fix

Threats

Impact critical

CVE-2021-33643

9.1 (Critical)


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

Affected products

Recommended 12 products, the same list as for CVE-2021-33640

Threats

Impact critical

CVE-2021-33645

7.5 (High)


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

Affected products

Recommended 12 products, the same list as for CVE-2021-33640

Threats

Impact important

References

14 references

URL	Category
https://www.suse.com/support/security/rating/	external
https://ftp.suse.com/pub/projects/security/csaf/o…	self
https://www.suse.com/security/cve/CVE-2021-33640/	self
https://www.suse.com/security/cve/CVE-2021-33643/	self
https://www.suse.com/security/cve/CVE-2021-33645/	self
https://www.suse.com/security/cve/CVE-2021-33640	external
https://bugzilla.suse.com/1206547	external
https://www.suse.com/security/cve/CVE-2021-33643	external
https://bugzilla.suse.com/1202316	external
https://bugzilla.suse.com/1202317	external
https://www.suse.com/security/cve/CVE-2021-33645	external
https://bugzilla.suse.com/1202319	external
https://bugzilla.suse.com/1202320	external
https://bugzilla.suse.com/1206547	external

JSON

To clipboard

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      "text": "moderate"
    },
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    "distribution": {
      "text": "Copyright 2024 SUSE LLC. All rights reserved.",
      "tlp": {
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        "category": "legal_disclaimer",
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  },
  "vulnerabilities": [
    {
      "cve": "CVE-2021-33640",
      "ids": [
        {
          "system_name": "SUSE CVE Page",
          "text": "https://www.suse.com/security/cve/CVE-2021-33640"
        }
      ],
      "notes": [
        {
          "category": "general",
          "text": "After tar_close(), libtar.c releases the memory pointed to by pointer t. After tar_close() is called in the list() function, it continues to use pointer t: free_longlink_longname(t-\u003eth_buf) . As a result, the released memory is used (use-after-free).",
          "title": "CVE description"
        }
      ],
      "product_status": {
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          "openSUSE Tumbleweed:libtar-0:1.2.20-3.1.ppc64le",
          "openSUSE Tumbleweed:libtar-0:1.2.20-3.1.s390x",
          "openSUSE Tumbleweed:libtar-0:1.2.20-3.1.x86_64",
          "openSUSE Tumbleweed:libtar-devel-0:1.2.20-3.1.aarch64",
          "openSUSE Tumbleweed:libtar-devel-0:1.2.20-3.1.ppc64le",
          "openSUSE Tumbleweed:libtar-devel-0:1.2.20-3.1.s390x",
          "openSUSE Tumbleweed:libtar-devel-0:1.2.20-3.1.x86_64",
          "openSUSE Tumbleweed:libtar1-0:1.2.20-3.1.aarch64",
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          "openSUSE Tumbleweed:libtar1-0:1.2.20-3.1.s390x",
          "openSUSE Tumbleweed:libtar1-0:1.2.20-3.1.x86_64"
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      "references": [
        {
          "category": "external",
          "summary": "CVE-2021-33640",
          "url": "https://www.suse.com/security/cve/CVE-2021-33640"
        },
        {
          "category": "external",
          "summary": "SUSE Bug 1206547 for CVE-2021-33640",
          "url": "https://bugzilla.suse.com/1206547"
        }
      ],
      "remediations": [
        {
          "category": "vendor_fix",
          "details": "To install this SUSE Security Update use the SUSE recommended installation methods like YaST online_update or \"zypper patch\".\n",
          "product_ids": [
            "openSUSE Tumbleweed:libtar-0:1.2.20-3.1.aarch64",
            "openSUSE Tumbleweed:libtar-0:1.2.20-3.1.ppc64le",
            "openSUSE Tumbleweed:libtar-0:1.2.20-3.1.s390x",
            "openSUSE Tumbleweed:libtar-0:1.2.20-3.1.x86_64",
            "openSUSE Tumbleweed:libtar-devel-0:1.2.20-3.1.aarch64",
            "openSUSE Tumbleweed:libtar-devel-0:1.2.20-3.1.ppc64le",
            "openSUSE Tumbleweed:libtar-devel-0:1.2.20-3.1.s390x",
            "openSUSE Tumbleweed:libtar-devel-0:1.2.20-3.1.x86_64",
            "openSUSE Tumbleweed:libtar1-0:1.2.20-3.1.aarch64",
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            "openSUSE Tumbleweed:libtar1-0:1.2.20-3.1.x86_64"
          ]
        }
      ],
      "scores": [
        {
          "cvss_v3": {
            "baseScore": 9.8,
            "baseSeverity": "CRITICAL",
            "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H",
            "version": "3.1"
          },
          "products": [
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          "date": "2026-06-22T00:00:00Z",
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          "category": "general",
          "text": "An attacker who submits a crafted tar file with size in header struct being 0 may be able to trigger an calling of malloc(0) for a variable gnu_longlink, causing an out-of-bounds read.",
          "title": "CVE description"
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          "product_ids": [
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      "scores": [
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          "cvss_v3": {
            "baseScore": 9.1,
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            "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H",
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          "category": "general",
          "text": "The th_read() function doesn\u0027t free a variable t-\u003eth_buf.gnu_longlink after allocating memory, which may cause a memory leak.",
          "title": "CVE description"
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            "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
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          "category": "impact",
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          "details": "important"
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      ],
      "title": "CVE-2021-33645"
    }
  ]
}

CVE-2021-33640 (GCVE-0-2021-33640)

Vulnerability from cvelistv5 – Published: 2022-12-19 00:00 – Updated: 2025-04-17 14:58

Summary

After tar_close(), libtar.c releases the memory pointed to by pointer t. After tar_close() is called in the list() function, it continues to use pointer t: free_longlink_longname(t->th_buf) . As a result, the released memory is used (use-after-free).

Severity

6.2 (Medium)


                        
                          CVSS:3.1/AV:L/AC:L/PR:N/UI:N/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 2025-04-17 14:57 UTC

CWE

CWE-416 - Use After Free

Assigner

openEuler mitre root

References

3 references

URL	Tags
https://www.openeuler.org/en/security/cve/detail/…
https://lists.fedoraproject.org/archives/list/pac…	vendor-advisory
https://lists.fedoraproject.org/archives/list/pac…	vendor-advisory

Impacted products

3 products

Vendor	Product	Version
openEuler	openEuler 22.03 LTS	Affected: libtar 1.2.20-21
openEuler	openEuler 20.03 LTS SP1	Affected: libtar 1.2.20-19
openEuler	openEuler 20.03 LTS SP3	Affected: libtar 1.2.20-19

Show details on NVD website

JSON

To clipboard

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  "containers": {
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        "providerMetadata": {
          "dateUpdated": "2024-08-03T23:58:21.909Z",
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            "url": "https://www.openeuler.org/en/security/cve/detail/?cveId=CVE-2021-33640\u0026packageName=libtar"
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            "attackComplexity": "LOW",
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CVE-2021-33643 (GCVE-0-2021-33643)

Vulnerability from cvelistv5 – Published: 2022-08-09 00:00 – Updated: 2026-06-23 14:42

Summary

An attacker who submits a crafted tar file with size in header struct being 0 may be able to trigger an calling of malloc(0) for a variable gnu_longlink, causing an out-of-bounds read.

Severity

6.5 (Medium)


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

SSVC

Exploitation: none Automatable: yes Technical Impact: partial

CISA Coordinator · CISA-ADP (v2.0.3)

Decision recorded 2026-06-23 14:41 UTC

CWE

CWE-125 - Out-of-bounds Read

Assigner

openEuler mitre root

References

7 references

URL	Tags
https://www.openeuler.org/en/security/safety-bull…
https://lists.fedoraproject.org/archives/list/pac…	vendor-advisory
https://lists.fedoraproject.org/archives/list/pac…	vendor-advisory
https://lists.fedoraproject.org/archives/list/pac…	vendor-advisory
https://lists.fedoraproject.org/archives/list/pac…	vendor-advisory
https://lists.fedoraproject.org/archives/list/pac…	vendor-advisory
https://lists.debian.org/debian-lts-announce/2025…

Impacted products

1 product

Vendor	Product	Version
n/a	libtar	Affected: <1.2.21

Show details on NVD website

JSON

To clipboard

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  "containers": {
    "adp": [
      {
        "providerMetadata": {
          "dateUpdated": "2025-11-03T20:33:35.833Z",
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CVE-2021-33645 (GCVE-0-2021-33645)

Vulnerability from cvelistv5 – Published: 2022-08-09 00:00 – Updated: 2025-11-03 20:33

Summary

The th_read() function doesn’t free a variable t->th_buf.gnu_longlink after allocating memory, which may cause a memory leak.

Severity

No CVSS data available.

CWE

CWE-401 - Missing Release of Memory after Effective Lifetime

Assigner

openEuler mitre root

References

7 references

URL	Tags
https://www.openeuler.org/en/security/safety-bull…
https://lists.fedoraproject.org/archives/list/pac…	vendor-advisory
https://lists.fedoraproject.org/archives/list/pac…	vendor-advisory
https://lists.fedoraproject.org/archives/list/pac…	vendor-advisory
https://lists.fedoraproject.org/archives/list/pac…	vendor-advisory
https://lists.fedoraproject.org/archives/list/pac…	vendor-advisory
https://lists.debian.org/debian-lts-announce/2025…

Impacted products

1 product

Vendor	Product	Version
n/a	libtar	Affected: <1.2.21

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.

Detection rules are retrieved from Rulezet.

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

OPENSUSE-SU-2026:11092-1

CVE-2021-33640 (GCVE-0-2021-33640)

CVE-2021-33643 (GCVE-0-2021-33643)

CVE-2021-33645 (GCVE-0-2021-33645)

Tags

Sightings

Nomenclature

Related by attack behaviour