Goal Reached Thanks to every supporter — we hit 100%!

Goal: 1000 CNY · Raised: 1359 CNY

100%
Buy Us a Coffee

CVE-2026-48092— 7-Zip SquashFS Fragment Offset Overflow (GHSL-2026-116)

Quick assessment

Affected
mcmilk 7-Zip
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

7-Zip是7-Zip开源的一个压缩软件。 7-Zip 9.34版本至26.00版本存在缓冲区错误漏洞，该漏洞源于SquashFS片段偏移整数溢出，可能导致攻击者控制的节点偏移值绕过片段边界检查，使memcpy读取缓存缓冲区前的堆内存到提取文件中。

CVSS 4.3 · Medium EPSS 0.50% · P40

Possible ATT&CK Techniques 1 AI

T1005 · Data from Local System

Affected Version Matrix 1

VendorProduct Version RangeStatus
mcmilk 7-Zip >= 9.34, < 26.01 affected
Get alerts for future matching vulnerabilities Log in to subscribe

I. Basic Information for CVE-2026-48092

Vulnerability Information
Have questions about the vulnerability? See if Shenlong's analysis helps!
View Shenlong Deep Dive ↗

Although we use advanced large model technology, its output may still contain inaccurate or outdated information.Shenlong tries to ensure data accuracy, but please verify and judge based on the actual situation.

Vulnerability Title
7-Zip SquashFS Fragment Offset Overflow (GHSL-2026-116)
Source: CVE Program / CVE List V5
Vulnerability Description
7-Zip is a file archiver with a high compression ratio. Versions 9.34 through 26.00 contain a heap memory disclosure via SquashFS fragment offset integer overflow on 32-bit builds. 32-bit integer overflow in the SquashFS ReadBlock function allows an attacker-controlled node.Offset value to bypass the fragment bounds check, causing memcpy to read heap memory preceding the cache buffer into the extracted file. The vulnerability is exploitable only on 32-bit builds of 7-Zip where size_t is 32 bits, allowing the addition offsetInBlock + blockSize to wrap modulo 2³². On 64-bit builds the addition is promoted to 64 bits and the check correctly rejects the input. Version 26.01 patches the issue.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:L
Source: CVE Program / CVE List V5
Vulnerability Type
跨界内存读
Source: CVE Program / CVE List V5
Vulnerability Title
7-Zip 缓冲区错误漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
7-Zip是7-Zip开源的一个压缩软件。 7-Zip 9.34版本至26.00版本存在缓冲区错误漏洞，该漏洞源于SquashFS片段偏移整数溢出，可能导致攻击者控制的节点偏移值绕过片段边界检查，使memcpy读取缓存缓冲区前的堆内存到提取文件中。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
mcmilk 7-Zip >= 9.34, < 26.01 -

II. Public POCs for CVE-2026-48092

# POC Description Source Link Shenlong Link
AI-Generated POC Premium

No public POC found.

Login to generate AI POC

III. Intelligence Information for CVE-2026-48092

请登录查看更多情报信息。

Same Patch Batch · mcmilk · 2026-06-05 · 8 CVEs total

CVE-2026-48095 8.8 HIGH GHSL-2026-140_7-Zip: 7-Zip has a heap buffer overflow via NTFS compressed stream buffer un
CVE-2026-48112 6.5 MEDIUM GHSL-2026-122 7-Zip Ar SYMDEF OOB Read
CVE-2026-48101 6.5 MEDIUM GHSL-2026-117: 7-Zip UEFI Capsule uninitialized heap memory disclosure
CVE-2026-48111 4.3 MEDIUM GHSL-2026-121 7-Zip UEFI DEPEX OOB Read
CVE-2026-48103 4.3 MEDIUM GHSL-2026-119 7-Zip WIM SecurityId OOB read
CVE-2026-48104 4.2 MEDIUM GHSL-2026-120: 7-Zip SquashFS BlockToNode uninitialized heap read
CVE-2026-48102 3.1 LOW GHSL-2026-118: 7-Zip UDF Field OOB Read

IV. Related Vulnerabilities

Same product: 7-Zip
Same vendor: mcmilk
Same weakness: CWE-125

V. Comments for CVE-2026-48092

No comments yet

Leave a comment