CVE-2026-70652
Description
A flaw was found in libvips, an image processing library. When libvips is built with libultrahdr support, it can incorrectly size an output buffer during the process of enlarging an incoming JPEG to a very large output before encoding a gain map. This undersized allocation can lead to a heap buffer over-read, potentially disclosing adjacent memory data or causing the application to crash, resulting in a denial of service.
Statement
Moderate: This flaw in libvips, when built with libultrahdr support, could lead to information disclosure or a denial of service. Exploitation requires processing a specially crafted JPEG with gain map data, which may not be a default or common operation in all Red Hat environments. The impact is limited to the application processing the malicious image.
Understanding the Weakness (CWE)
Confidentiality
Technical Impact: Read Memory
An attacker could get secret values such as cryptographic keys, PII, memory addresses, or other information that could be used in additional attacks.
Confidentiality
Technical Impact: Bypass Protection Mechanism
Out-of-bounds memory could contain memory addresses or other information that can be used to bypass ASLR and other protection mechanisms in order to improve the reliability of exploiting a separate weakness for code execution.
Availability
Technical Impact: DoS: Crash, Exit, or Restart
An attacker could cause a segmentation fault or crash by causing memory to be read outside of the bounds of the buffer. This is especially likely when the code reads a variable amount of data and assumes that a sentinel exists to stop the read operation, such as a NUL in a string.
Other
Technical Impact: Varies by Context
The read operation could produce other undefined or unexpected results.
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