CVE-2026-80892

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On high-CPU\nsystems, a small EROFS image can pin hundreds of MiB of vmalloc-backed\ndecoder state until the erofs module is unloaded.\n\nImpact: An EROFS image mounted by the system can pin up to 8 MiB of\nvmalloc memory per LZMA stream, either as intended or unexpectedly.\n\nBound the default stream count by a new\nCONFIG_EROFS_FS_ZIP_LZMA_DEFAULT_MAX_STREAMS option, default 16, so the\nworst-case default preallocation is 128 MiB if the number of CPUs is no\nless than 16 while preserving the existing per-image dictionary limit.\nAn explicit lzma_streams module parameter is still honoured as-is, so\nadministrators who deliberately size the pool are not affected."}], "affected": [{"product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["fs/erofs/Kconfig", "fs/erofs/decompressor_lzma.c"], "versions": [{"version": "622ceaddb7649ca328832f50ba1400af778d75fa", "lessThan": "682cb3ece37fc5141e73bc726ccf4adb833e5189", "status": "affected", "versionType": "git"}, {"version": "622ceaddb7649ca328832f50ba1400af778d75fa", "lessThan": "e8b3d09aa8889dda9be9cbb3d2f0218c4b9acde4", "status": "affected", "versionType": "git"}, {"version": "622ceaddb7649ca328832f50ba1400af778d75fa", "lessThan": "0c676903cb2a61992ded8e7907609cc6b0f11744", "status": "affected", "versionType": "git"}, {"version": "622ceaddb7649ca328832f50ba1400af778d75fa", "lessThan": "5aaa06dfc10f8398c8807453dbec738ea9af10e4", "status": "affected", "versionType": "git"}, {"version": "622ceaddb7649ca328832f50ba1400af778d75fa", "lessThan": "e52da169b8c0d19bb2d803f2a07fe0e5a00462d6", "status": "affected", "versionType": "git"}, {"version": "622ceaddb7649ca328832f50ba1400af778d75fa", "lessThan": "c9b47e6b23114e939b17f818471c7a46e59006e7", "status": "affected", "versionType": "git"}]}, {"product": "Linux", "vendor": "Linux", "defaultStatus": "affected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["fs/erofs/Kconfig", "fs/erofs/decompressor_lzma.c"], "versions": [{"version": "5.16", "status": "affected"}, {"version": "0", "lessThan": "5.16", "status": "unaffected", "versionType": "semver"}, {"version": "6.1.184", "lessThanOrEqual": "6.1.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.6.151", "lessThanOrEqual": "6.6.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.12.103", "lessThanOrEqual": "6.12.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.18.44", "lessThanOrEqual": "6.18.*", "status": "unaffected", "versionType": "semver"}, {"version": "7.1.8", "lessThanOrEqual": "7.1.*", "status": "unaffected", "versionType": "semver"}, {"version": "7.2", "lessThanOrEqual": "*", "status": "unaffected", "versionType": "original_commit_for_fix"}]}], "cpeApplicability": [{"nodes": [{"operator": "OR", "negate": false, "cpeMatch": [{"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.16", "versionEndExcluding": "6.1.184"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.16", "versionEndExcluding": "6.6.151"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.16", "versionEndExcluding": "6.12.103"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.16", "versionEndExcluding": "6.18.44"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.16", "versionEndExcluding": "7.1.8"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.16", "versionEndExcluding": "7.2"}]}]}], "references": [{"url": "https://git.kernel.org/stable/c/682cb3ece37fc5141e73bc726ccf4adb833e5189"}, {"url": "https://git.kernel.org/stable/c/e8b3d09aa8889dda9be9cbb3d2f0218c4b9acde4"}, {"url": "https://git.kernel.org/stable/c/0c676903cb2a61992ded8e7907609cc6b0f11744"}, {"url": "https://git.kernel.org/stable/c/5aaa06dfc10f8398c8807453dbec738ea9af10e4"}, {"url": "https://git.kernel.org/stable/c/e52da169b8c0d19bb2d803f2a07fe0e5a00462d6"}, {"url": "https://git.kernel.org/stable/c/c9b47e6b23114e939b17f818471c7a46e59006e7"}], "title": "erofs: cap LZMA stream pool size", "x_generator": {"engine": "bippy-1.2.0"}}, "adp": [{"metrics": [{"other": {"type": "ssvc", "content": {"id": "CVE-2026-80892", "role": "CISA Coordinator", "options": [{"Exploitation": "none"}, {"Automatable": "no"}, {"Technical Impact": "partial"}], "version": "2.0.3", "timestamp": "2026-11-06T17:04:39.997592Z"}}}], "title": "CISA ADP Vulnrichment", "providerMetadata": {"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "shortName": "CISA-ADP", "dateUpdated": "2026-11-06T17:05:56.225Z"}}]}}

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On high-CPU\nsystems, a small EROFS image can pin hundreds of MiB of vmalloc-backed\ndecoder state until the erofs module is unloaded.\n\nImpact: An EROFS image mounted by the system can pin up to 8 MiB of\nvmalloc memory per LZMA stream, either as intended or unexpectedly.\n\nBound the default stream count by a new\nCONFIG_EROFS_FS_ZIP_LZMA_DEFAULT_MAX_STREAMS option, default 16, so the\nworst-case default preallocation is 128 MiB if the number of CPUs is no\nless than 16 while preserving the existing per-image dictionary limit.\nAn explicit lzma_streams module parameter is still honoured as-is, so\nadministrators who deliberately size the pool are not affected."}], "cpeApplicability": [{"nodes": [{"negate": false, "cpeMatch": [{"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "versionEndExcluding": "6.1.184", "versionStartIncluding": "5.16"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "versionEndExcluding": "6.6.151", "versionStartIncluding": "5.16"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "versionEndExcluding": "6.12.103", "versionStartIncluding": "5.16"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "versionEndExcluding": "6.18.44", "versionStartIncluding": "5.16"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "versionEndExcluding": "7.1.8", "versionStartIncluding": "5.16"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "versionEndExcluding": "7.2", "versionStartIncluding": "5.16"}], "operator": "OR"}]}], "providerMetadata": {"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-09-04T17:11:08.391Z"}}}, "cveMetadata": {"cveId": "CVE-2026-80892", "state": "PUBLISHED", "dateUpdated": "2026-11-06T17:05:56.225Z", "dateReserved": "2026-08-26T14:34:25.800Z", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "datePublished": "2026-09-04T17:11:08.391Z", "assignerShortName": "Linux"}, "dataVersion": "5.2"}

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{}

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