CVE-2026-80892

CVE CVE-2026-80892EUVD EUVD-2026-71642Published 2026-09-04T17:11:08.000Z

What the advisory describes

In the Linux kernel, the following vulnerability has been resolved: erofs: cap LZMA stream pool size fs/erofs/decompressor_lzma.c sizes the module-global MicroLZMA stream pool from num_possible_cpus() when the lzma_streams module parameter is unset, then z_erofs_load_lzma_config() preallocates one image-supplied dictionary per stream, accepting dictionaries up to 8 MiB. On high-CPU systems, a small EROFS image can pin hundreds of MiB of vmalloc-backed decoder state until the erofs module is unloaded. Impact: An EROFS image mounted by the system can pin up to 8 MiB of vmalloc memory per LZMA stream, either as intended or unexpectedly. Bound the default stream count by a new CONFIG_EROFS_FS_ZIP_LZMA_DEFAULT_MAX_STREAMS option, default 16, so the worst-case default preallocation is 128 MiB if the number of CPUs is no less than 16 while preserving the existing per-image dictionary limit. An explicit lzma_streams module parameter is still honoured as-is, so administrators who deliberately size the pool are not affected.

Source: EUVD (ENISA), in the words of the advisory.

Products the advisory names

These come from the advisory itself, not from any check we performed.

Linux — Linux patch: 7.2; 622ceaddb7649ca328832f50ba1400af778d75fa <682cb3ece37fc5141e73bc726ccf4adb833e5189; 622ceaddb7649ca328832f50ba1400af778d75fa <e8b3d09aa8889dda9be9cbb3d2f0218c4b9acde4; 5.16; patch: 7.1.8; patch: 0; 622ceaddb7649ca328832f50ba1400af778d75fa <e52da169b8c0d19bb2d803f2a07fe0e5a00462d6; patch: 6.6.151; patch: 6.18.44; 622ceaddb7649ca328832f50ba1400af778d75fa <c9b47e6b23114e939b17f818471c7a46e59006e7; 622ceaddb7649ca328832f50ba1400af778d75fa <0c676903cb2a61992ded8e7907609cc6b0f11744; patch: 6.12.103; 622ceaddb7649ca328832f50ba1400af778d75fa <5aaa06dfc10f8398c8807453dbec738ea9af10e4; patch: 6.1.184

The versions shown are the advisory's own. Patchlage compares no version numbers and derives no judgement from them — which version is installed is something a person has to look up.

Carried in the product catalogue

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Linux — Linux

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