libvips up to 8.18.2 Uhdrsave uhdrsave.c vips_foreign_save_uhdr_set_raw_hdr heap-based overflow

Summaryinfo

A vulnerability was found in libvips up to 8.18.2. It has been rated as critical. The affected element is the function vips_foreign_save_uhdr_set_raw_hdr of the file libvips/foreign/uhdrsave.c of the component Uhdrsave. This manipulation causes heap-based overflow. This vulnerability appears as CVE-2026-70652. The attack may be initiated remotely. There is no available exploit.

Detailsinfo

A vulnerability was found in libvips up to 8.18.2. It has been declared as critical. Affected by this vulnerability is the function vips_foreign_save_uhdr_set_raw_hdr of the file libvips/foreign/uhdrsave.c of the component Uhdrsave. The manipulation with an unknown input leads to a heap-based overflow vulnerability. The CWE definition for the vulnerability is CWE-122. A heap overflow condition is a buffer overflow, where the buffer that can be overwritten is allocated in the heap portion of memory, generally meaning that the buffer was allocated using a routine such as malloc(). As an impact it is known to affect confidentiality, integrity, and availability. The summary by CVE is:

libvips is a fast image processing library with low memory needs. Prior to version 8.18.3, libvips built with libultrahdr support can incorrectly size an output buffer in libvips/foreign/uhdrsave.c within vips_foreign_save_uhdr_set_raw_hdr when a pipeline enlarges an incoming JPEG to a very large output before encoding a gain map through VipsForeignSaveUhdr. The undersized allocation can cause a heap buffer over-read that may disclose adjacent data or crash the process. This issue is fixed in version 8.18.3.

It is possible to read the advisory at github.com. This vulnerability is known as CVE-2026-70652 since 08/04/2026. The exploitation appears to be easy. The attack can be launched remotely. The exploitation doesn't need any form of authentication. Technical details of the vulnerability are known, but there is no available exploit.

Upgrading to version 8.18.3 eliminates this vulnerability.

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Productinfo

Name

• libvips

Version

• 8.18.0
• 8.18.1
• 8.18.2

Website

• Product: https://github.com/libvips/libvips/

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