Task hang via truncated EROFS Zstandard input
Published Dec 16, 2025 · Updated Dec 16, 2025
Denial of service in Linux kernel EROFS decompression allows attackers to stall file reads with a truncated Zstandard-compressed image. In fs/erofs/decompressor_zstd.c, z_erofs_zstd_decompress fails to reject exhausted truncated input when output remains, so repeated zstd_decompress_stream calls make no progress. The image must be mounted and read with kernel EROFS Zstandard support; the loop stalls the accessing task rather than corrupting data.
Summary
What happened
Denial of service in Linux kernel EROFS decompression allows attackers to stall file reads with a truncated Zstandard-compressed image. In fs/erofs/decompressor_zstd.c, z_erofs_zstd_decompress fails to reject exhausted truncated input when output remains, so repeated zstd_decompress_stream calls make no progress. The image must be mounted and read with kernel EROFS Zstandard support; the loop stalls the accessing task rather than corrupting data.
The record
- CVE
- CVE-2025-68210
- Published
- Dec 16, 2025
- Updated
- Dec 16, 2025
- Vendor
- The Linux Kernel Organization
- Product
- Linux
- Classifications
- Unavailable
- Attack vector
- Unavailable
- Privileges
- Unavailable
Timeline
How it unfolded
- Dec 16, 2025CVE publishedPublication date reported by the CVE source.
- Dec 16, 2025Record updatedLatest update available in the CVE record.
Exploitability
Present is not the same as exploitable
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Is a vulnerable build present?
Compare these published version ranges with your installed build and any vendor patches.
- Affected versionversion=6.10
- Affected versionversion=7c35de4df1056a5a1fb4de042197b8f5b1033b61 <1f86d73a0afe43b6a85d2aa8207853350b7e2111
- Affected versionversion=7c35de4df1056a5a1fb4de042197b8f5b1033b61 <4d0e0bb1908acac5b27d30b45c450e8ead97eb00
- Affected versionversion=7c35de4df1056a5a1fb4de042197b8f5b1033b61 <f2a12cc3b97f062186568a7b94ddb7aa2ef68140
What conditions does exploitation require?
What is affected?
Published CVSS scores
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Attacks
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Public exploit references
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Technologies
Your stack
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Your stack
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