Vulnerability-Lookup

SUSE-SU-2026:23392-1

Vulnerability from csaf_suse - Published: 2026-08-27 12:45 - Updated: 2026-09-17 16:20

Summary

Security update for gzip

Severity

Moderate

Notes

Title of the patch: Security update for gzip

Description of the patch: This update for gzip fixes the following issues: - CVE-2026-41992: global buffer overflow in the LZH decompression logic due to improper reuse of shared global state between different decompression formats within a single execution (bsc#1269623, bsc#1272554).

Patchnames: SUSE-SL-Micro-6.2-1529

CVE-2026-41992

6.1 (Medium)


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

Affected products

Recommended 4 products

Product	Version	Remediation
Unresolved product id: SUSE Linux Micro 6.2:gzip-0:1.13-160000.4.1.aarch64	—	Vendor Fix
Unresolved product id: SUSE Linux Micro 6.2:gzip-0:1.13-160000.4.1.ppc64le	—	Vendor Fix
Unresolved product id: SUSE Linux Micro 6.2:gzip-0:1.13-160000.4.1.s390x	—	Vendor Fix
Unresolved product id: SUSE Linux Micro 6.2:gzip-0:1.13-160000.4.1.x86_64	—	Vendor Fix

Threats

Impact moderate

References

10 references

URL	Category
https://www.suse.com/support/security/rating/	external
https://ftp.suse.com/pub/projects/security/csaf/s…	self
https://www.suse.com/support/update/announcement/…	self
https://lists.suse.com/pipermail/sle-updates/2026…	self
https://bugzilla.suse.com/1269623	self
https://bugzilla.suse.com/1272554	self
https://www.suse.com/security/cve/CVE-2026-41992/	self
https://www.suse.com/security/cve/CVE-2026-41992	external
https://bugzilla.suse.com/1269623	external
https://bugzilla.suse.com/1272554	external

JSON

To clipboard

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}

CVE-2026-41992 (GCVE-0-2026-41992)

Vulnerability from cvelistv5 – Published: 2026-06-29 10:15 – Updated: 2026-08-27 11:39 X_Open Source

Title

Global Buffer Overflow in GNU gzip

Summary

GNU gzip contains a global buffer overflow vulnerability in the LZH decompression logic caused by improper reuse of shared global state between different decompression formats within a single execution. GNU gzip maintains a global array that is shared across the LZ77, LZW, and LZH decompression routines and is not reinitialized between files processed in the same invocation. By decompressing a specially crafted LZW file followed by a specially crafted LZH file in a single gzip -d command, an attacker can poison the shared global state and subsequently trigger an out‑of‑bounds read in the LZH decoder. The LZH decompression logic follows stale values left in the shared array, causing reads past the end of the allocated global buffer. This issue has been fixed in commits 63dbf6b3b9e6e781df1a6a64e609b10e23969681 and e7378c2d421be6a286922374425680bbe9ad8b7d.

Severity

6.9 (Medium)


                        
                          CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N

SSVC

Exploitation: none Automatable: no Technical Impact: partial

CISA Coordinator · CISA-ADP (v2.0.3)

Decision recorded 2026-06-29 13:30 UTC

CWE

CWE-126 - Buffer Over-read

Assigner

CERT-PL ENISA root

References

7 references

URL	Tags
https://cert.pl/en/posts/2026/04/CVE-2026-41991/	third-party-advisory
https://www.gnu.org/software/gzip/	product
https://cgit.git.savannah.gnu.org/cgit/gzip.git/c…	patch
https://cgit.git.savannah.gnu.org/cgit/gzip.git/c…	patch
http://www.openwall.com/lists/oss-security/2026/08/23/1
http://www.openwall.com/lists/oss-security/2026/08/25/1
http://www.openwall.com/lists/oss-security/2026/08/27/2

Impacted products

1 product

Vendor	Product	Version
GNU	gzip	Affected: 0 , ≤ 1.14 (custom) cpe:2.3:a:gnu:gzip::::::::

Credits

Michał Majchrowicz (AFINE) Marcin Wyczechowski (AFINE) Elias Hasas (@zer0d4y5)

Show details on NVD website

JSON

To clipboard

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              "description": "CWE-126: Buffer Over-read",
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              "type": "CWE"
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-08-27T11:39:40.630Z",
        "orgId": "4bb8329e-dd38-46c1-aafb-9bf32bcb93c6",
        "shortName": "CERT-PL"
      },
      "references": [
        {
          "tags": [
            "third-party-advisory"
          ],
          "url": "https://cert.pl/en/posts/2026/04/CVE-2026-41991/"
        },
        {
          "tags": [
            "product"
          ],
          "url": "https://www.gnu.org/software/gzip/"
        },
        {
          "tags": [
            "patch"
          ],
          "url": "https://cgit.git.savannah.gnu.org/cgit/gzip.git/commit/?id=63dbf6b3b9e6e781df1a6a64e609b10e23969681"
        },
        {
          "tags": [
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          "url": "https://cgit.git.savannah.gnu.org/cgit/gzip.git/commit/?id=e7378c2d421be6a286922374425680bbe9ad8b7d"
        }
      ],
      "source": {
        "discovery": "EXTERNAL"
      },
      "tags": [
        "x_open-source"
      ],
      "title": "Global Buffer Overflow in GNU gzip",
      "x_generator": {
        "engine": "Vulnogram 0.2.0"
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "4bb8329e-dd38-46c1-aafb-9bf32bcb93c6",
    "assignerShortName": "CERT-PL",
    "cveId": "CVE-2026-41992",
    "datePublished": "2026-06-29T10:15:57.278Z",
    "dateReserved": "2026-04-23T08:06:09.511Z",
    "dateUpdated": "2026-08-27T11:39:40.630Z",
    "state": "PUBLISHED"
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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.