Upstream information

CVE-2026-48104 at MITRE

Description

7-Zip is a file archiver with a high compression ratio. Versions 9.18 through 26.00 contain an uninitialized heap read in the SquashFS archive handler caused by a sparsely populated index array. In the SquashFS handler, _blockToNode is allocated with capacity for every metadata block but populated only when an inode crosses a block boundary, so a crafted image with few inodes spanning many blocks leaves most slots holding raw heap contents (the underlying allocator does not zero-initialize POD storage). When OpenDir looks up an attacker-influenced blockIndex (derived from the RootInode superblock field), it reads two of these uninitialized slots and passes them as the left/right bounds of a binary search over _nodesPos, which dereferences the midpoint without bounds checking; if the resulting value happens to match the search key, the returned index is used to read a full node struct from _nodes whose fields feed further directory parsing, forming a chained OOB read primitive that is heap-layout-dependent and not reliably triggerable. The SquashFS handler is enabled by default in stock 7z.dll and the issue triggers during Open() with no interaction beyond opening the file; impact is denial of service from wild-pointer dereference and potential heap information disclosure, with no write primitive. Version 26.01 fixes the issue.

SUSE information

Overall state of this security issue: Pending

This issue is currently rated as having low severity.

CVSS v3 Scores
CVSS detail CNA (GitHub) SUSE
Base Score 4.2 3.6
Vector CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:L/I:N/A:L CVSS:3.1/AV:L/AC:H/PR:N/UI:R/S:U/C:L/I:N/A:L
Attack Vector Network Local
Attack Complexity High High
Privileges Required None None
User Interaction Required Required
Scope Unchanged Unchanged
Confidentiality Impact Low Low
Integrity Impact None None
Availability Impact Low Low
CVSSv3 Version 3.1 3.1
CVSS v4 Scores
CVSS detail SUSE
Base Score 1.8
Vector CVSS:4.0/AV:L/AC:H/AT:N/PR:N/UI:A/VC:L/VI:N/VA:L/SC:N/SI:N/SA:N
Attack Vector Local
Attack Complexity High
Attack Requirements None
Privileges Required None
User Interaction Active
Vulnerable System Confidentiality Impact Low
Vulnerable System Integrity Impact None
Vulnerable System Availability Impact Low
Subsequent System Confidentiality Impact None
Subsequent System Integrity Impact None
Subsequent System Availability Impact None
CVSSv4 Version 4.0
SUSE Bugzilla entry: 1267862 [NEW]

No SUSE Security Announcements cross referenced.

List of packages in QA

Product(s) Package(s)
SUSE Linux Enterprise High Performance Computing 15 SP4-ESPOS
  • 7zip >= 26.01-150400.9.6.1
SUSE Linux Enterprise High Performance Computing 15 SP4-LTSS
  • 7zip >= 26.01-150400.9.6.1
SUSE Linux Enterprise High Performance Computing 15 SP5-ESPOS
  • 7zip >= 26.01-150400.9.6.1
SUSE Linux Enterprise High Performance Computing 15 SP5-LTSS
  • 7zip >= 26.01-150400.9.6.1
SUSE Linux Enterprise Module for Basesystem 15 SP7
  • 7zip >= 26.01-150400.9.6.1
SUSE Linux Enterprise Server 15 SP7
  • 7zip >= 26.01-150400.9.6.1
SUSE Linux Enterprise Desktop 15 SP7
  • 7zip >= 26.01-150400.9.6.1
SUSE Linux Enterprise Server for SAP Applications 15 SP7
  • 7zip >= 26.01-150400.9.6.1
SUSE Linux Enterprise High Performance Computing 15 SP7
  • 7zip >= 26.01-150400.9.6.1
SUSE Linux Enterprise Server 15 SP4-LTSS
  • 7zip >= 26.01-150400.9.6.1
SUSE Linux Enterprise Server 15 SP4-LTSS
  • 7zip >= 26.01-150400.9.6.1
SUSE Linux Enterprise Server 15 SP5-LTSS
  • 7zip >= 26.01-150400.9.6.1
SUSE Linux Enterprise Server 15 SP5-LTSS
  • 7zip >= 26.01-150400.9.6.1
SUSE Linux Enterprise Server 15 SP6-LTSS
  • 7zip >= 26.01-150400.9.6.1
SUSE Linux Enterprise Server 15 SP6-LTSS
  • 7zip >= 26.01-150400.9.6.1
SUSE Linux Enterprise Server for SAP Applications 15 SP4
  • 7zip >= 26.01-150400.9.6.1
SUSE Linux Enterprise Server for SAP Applications 15 SP5
  • 7zip >= 26.01-150400.9.6.1
SUSE Linux Enterprise Server for SAP Applications 15 SP6
  • 7zip >= 26.01-150400.9.6.1

Status of this issue by product and package

Please note that this evaluation state might be work in progress, incomplete or outdated. Also information for service packs in the LTSS phase is only included for issues meeting the LTSS criteria. If in doubt, feel free to contact us for clarification. The updates are grouped by state of their lifecycle. SUSE product lifecycles are documented on the lifecycle page.

Product(s) Source package State
Products under general support and receiving all security fixes.
SUSE Linux Enterprise Desktop 15 SP7 7zip In progress
SUSE Linux Enterprise High Performance Computing 15 SP7 7zip In progress
SUSE Linux Enterprise Module for Basesystem 15 SP7 7zip In progress
SUSE Linux Enterprise Server 15 SP7 7zip In progress
SUSE Linux Enterprise Server 16.0 7zip In progress
SUSE Linux Enterprise Server 16.1 7zip Affected
SUSE Linux Enterprise Server for SAP Applications 15 SP7 7zip In progress
SUSE Linux Enterprise Server for SAP applications 16.0 7zip In progress
SUSE Linux Enterprise Server for SAP applications 16.1 7zip Affected
openSUSE Leap 16.0 7zip Affected
Products under Long Term Service Pack support and receiving important and critical security fixes.
SUSE Linux Enterprise High Performance Computing 15 SP4-LTSS 7zip In progress
SUSE Linux Enterprise High Performance Computing 15 SP5-LTSS 7zip In progress
SUSE Linux Enterprise Server 15 SP4-LTSS 7zip In progress
SUSE Linux Enterprise Server 15 SP5-LTSS 7zip In progress
SUSE Linux Enterprise Server 15 SP6-LTSS 7zip In progress
SUSE Linux Enterprise Server for SAP Applications 15 SP6 7zip In progress
Products past their end of life and not receiving proactive updates anymore.
SUSE Linux Enterprise High Performance Computing 15 SP4-ESPOS 7zip In progress
SUSE Linux Enterprise High Performance Computing 15 SP5-ESPOS 7zip In progress
SUSE Linux Enterprise Server for SAP Applications 15 SP4 7zip In progress
SUSE Linux Enterprise Server for SAP Applications 15 SP5 7zip In progress
openSUSE Leap 15.6 7zip Affected

SUSE Timeline for this CVE

CVE page created: Fri Jun 5 20:02:23 2026
CVE page last modified: Wed Jun 17 11:33:43 2026