Detections
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Echo: 7zip: security update to 22.01+really26.01+dfsg-0+deb12u1

high Tenable Cloud Security Plugin ID 462413

Description

There are packages installed that are affected by a vulnerability referenced in the following CVE:

 - 7-Zip is a file archiver with a high compression ratio. Versions 9.21 through 26.00 contain an off-by-one
 out-of-bounds read vulnerability in the ParseDepedencyExpression function of the UEFI firmware image
 parser(CPP/7zip/Archive/UefiHandler.cpp). The function validates an attacker-controlled opcode byte using
 > instead of >= against the element count of the 10-entry kExpressionCommands static array, allowing an
 opcode value of 10 to read one pointer slot (8 bytes on x64) past the end of the array in .rodata. The
 out-of-bounds value is then dereferenced as a const char * and passed through strlen and memcpy into the
 archive's Characts property, which may cause either a denial of service (access violation when the
 adjacent bytes do not form a valid readable pointer) or a minor information disclosure of an adjacent
 .rdata string literal into archive metadata. The vulnerability is reached automatically during
 IInArchive::Open() via the call path OpenFv/OpenCapsule → ParseVolume → ParseSections when processing a
 SECTION_DXE_DEPEX (0x13) or SECTION_PEI_DEPEX (0x1B) section whose first body byte is 0x0A, and the UEFI
 handler is enabled by default in stock 7z.dll with signature-based detection for both UEFIc and UEFIf
 formats. The outcome (crash vs. silent leak) is deterministic per build but linker-layout dependent, with
 no write primitive and no disclosure of heap data, secrets, or ASLR base addresses. Version 26.01 fixes
 the issue. (CVE-2026-48111)

Solution

Update the 7zip library and its related packages to version 22.01+really26.01+dfsg-0+deb12u1 or later.

See Also

https://advisory.echohq.com/cve/CVE-2026-48111

Plugin Details

Severity: High

ID: 462413

Version: Revision 1.1

Type: Local

Published: 10/2/2026

Updated: 10/2/2026

Risk Information

VPR

Risk Factor: Medium

Score: 5.5

Percentile: 96.41

CVSS v2

Risk Factor: High

Base Score: 8.5

Temporal Score: 6.7

Vector: CVSS2#AV:N/AC:L/Au:N/C:P/I:N/A:C

CVSS Score Source: CVE-2026-48111

CVSS v3

Risk Factor: High

Base Score: 7.1

Temporal Score: 6.4

Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:N/A:H

Temporal Vector: CVSS:3.0/E:P/RL:O/RC:C

Vulnerability Information

Exploit Available: true

Exploit Ease: Exploits are available

Patch Publication Date: 7/6/2026

Vulnerability Publication Date: 6/4/2026

Reference Information

CVE: CVE-2026-48111

IAVA: 2026-A-0525