7-Zip SquashFS Fragment Offset Overflow (GHSL-2026-116)
Default status is the baseline for the product, each version can override it (e.g. patched versions marked unaffected).
| Vendor | Product | Default status | Versions | ||||||
|---|---|---|---|---|---|---|---|---|---|
| mcmilk | 7-Zip | affected |
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No data.
| Vendor | Product | Versions | ||||||||
|---|---|---|---|---|---|---|---|---|---|---|
| Mcmilk | 7-zip |
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| Source | ID | Title |
|---|---|---|
Debian DLA |
DLA-4681-1 | p7zip security update |
No CVSS v4.0
No CVSS v3.0
No CVSS v2
This CVE is not in the KEV list.
Exploit prediction score: 2.7% (2.742% probability within 30 days)
| Type | Values Removed | Values Added |
|---|---|---|
| Metrics |
ssvc
|
| Type | Values Removed | Values Added |
|---|---|---|
| First Time appeared |
7-zip
7-zip 7-zip |
|
| CPEs | cpe:2.3:a:7-zip:7-zip:*:*:*:*:*:*:*:* | |
| Vendors & Products |
7-zip
7-zip 7-zip |
| Type | Values Removed | Values Added |
|---|---|---|
| First Time appeared |
Mcmilk
Mcmilk 7-zip |
|
| Vendors & Products |
Mcmilk
Mcmilk 7-zip |
| Type | Values Removed | Values Added |
|---|---|---|
| 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. | |
| Title | 7-Zip SquashFS Fragment Offset Overflow (GHSL-2026-116) | |
| Weaknesses | CWE-125 | |
| References |
| |
| Metrics |
cvssV3_1
|