INFSA-2025:7524: xz security update

Information about definition

Identificator: INFSA-2025:7524

Type: security

Release date: 2025-07-15 19:30:12 UTC

Information about package

XZ Utils is an integrated collection of user-space file compression utilities based on the Lempel-Ziv-Markov chain algorithm (LZMA), which performs lossless data compression. The algorithm provides a high compression ratio while keeping the decompression time short.

Vulnerabilities description

  • CVE-2025-31115

    A flaw was found in the XZ Utils library. In affected versions, the multithreaded .xz decoder in liblzma has a bug where invalid input can trigger a heap use-after-free condition, allowing writes to an address based on the null pointer plus an offset. This issue may result in a crash or other undefined behavior. Applications and libraries that use the lzma_stream_decoder_mt function are affected.

Severity level

CVE Score CVSS 2.0 Score CVSS 3.x Score CVSS 4.0
no information 7.5 no information
Critical, important, moderate, low

Updated packages