CVE-2026-80892None▾ SunlitIn 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 param…
▾ Sunlit zone — Low / medium · no exploitation signal
impact 2.8 · likelihood 0 · exploitation 0
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Stakeholder-Specific Vulnerability Categorization from CISA's ADP record at CVE.org: whether exploitation is observed, whether an attack can be automated, and how much of the system is at stake.
Exploit-prediction probability, daily snapshots since Nov 6.
Disclosure to exploitation, from the record and what we observed since indexing it.
Disclosed via CVEORG
Last analysed / modified upstream
0.2%
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.
Linux >= 622ceaddb7649ca328832f50ba1400af778d75fa < 682cb3ece37fc5141e73bc726ccf4adb833e5189Linux >= 622ceaddb7649ca328832f50ba1400af778d75fa < e8b3d09aa8889dda9be9cbb3d2f0218c4b9acde4Linux >= 622ceaddb7649ca328832f50ba1400af778d75fa < 0c676903cb2a61992ded8e7907609cc6b0f11744Linux >= 622ceaddb7649ca328832f50ba1400af778d75fa < 5aaa06dfc10f8398c8807453dbec738ea9af10e4Linux >= 622ceaddb7649ca328832f50ba1400af778d75fa < e52da169b8c0d19bb2d803f2a07fe0e5a00462d6Linux >= 622ceaddb7649ca328832f50ba1400af778d75fa < c9b47e6b23114e939b17f818471c7a46e59006e7Linux 5.16Refer to the linked advisories for vendor-supplied fixes and affected version ranges.
Connected by shared product, vendor, weakness, or advisory.
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