CVE-2026-80892 (GCVE-0-2026-80892)
Vulnerability from cvelistv5 – Published: 2026-09-04 17:11 – Updated: 2026-09-04 17:11
VLAI
EPSS
VEX
Title
erofs: cap LZMA stream pool size
Summary
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.
Severity
No CVSS data available.
Assigner
References
6 references
Impacted products
2 products
| Vendor | Product | Version | CPE status | |
|---|---|---|---|---|
| Linux | Linux |
Affected:
622ceaddb7649ca328832f50ba1400af778d75fa , < 682cb3ece37fc5141e73bc726ccf4adb833e5189
(git)
Affected: 622ceaddb7649ca328832f50ba1400af778d75fa , < e8b3d09aa8889dda9be9cbb3d2f0218c4b9acde4 (git) Affected: 622ceaddb7649ca328832f50ba1400af778d75fa , < 0c676903cb2a61992ded8e7907609cc6b0f11744 (git) Affected: 622ceaddb7649ca328832f50ba1400af778d75fa , < 5aaa06dfc10f8398c8807453dbec738ea9af10e4 (git) Affected: 622ceaddb7649ca328832f50ba1400af778d75fa , < e52da169b8c0d19bb2d803f2a07fe0e5a00462d6 (git) Affected: 622ceaddb7649ca328832f50ba1400af778d75fa , < c9b47e6b23114e939b17f818471c7a46e59006e7 (git) |
guessed | |
| Linux | Linux |
Affected:
5.16
Unaffected: 0 , < 5.16 (semver) Unaffected: 6.1.184 , ≤ 6.1.* (semver) Unaffected: 6.6.151 , ≤ 6.6.* (semver) Unaffected: 6.12.103 , ≤ 6.12.* (semver) Unaffected: 6.18.44 , ≤ 6.18.* (semver) Unaffected: 7.1.8 , ≤ 7.1.* (semver) Unaffected: 7.2 , ≤ * (original_commit_for_fix) |
guessed |
{
"containers": {
"cna": {
"affected": [
{
"defaultStatus": "unaffected",
"product": "Linux",
"programFiles": [
"fs/erofs/Kconfig",
"fs/erofs/decompressor_lzma.c"
],
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"versions": [
{
"lessThan": "682cb3ece37fc5141e73bc726ccf4adb833e5189",
"status": "affected",
"version": "622ceaddb7649ca328832f50ba1400af778d75fa",
"versionType": "git"
},
{
"lessThan": "e8b3d09aa8889dda9be9cbb3d2f0218c4b9acde4",
"status": "affected",
"version": "622ceaddb7649ca328832f50ba1400af778d75fa",
"versionType": "git"
},
{
"lessThan": "0c676903cb2a61992ded8e7907609cc6b0f11744",
"status": "affected",
"version": "622ceaddb7649ca328832f50ba1400af778d75fa",
"versionType": "git"
},
{
"lessThan": "5aaa06dfc10f8398c8807453dbec738ea9af10e4",
"status": "affected",
"version": "622ceaddb7649ca328832f50ba1400af778d75fa",
"versionType": "git"
},
{
"lessThan": "e52da169b8c0d19bb2d803f2a07fe0e5a00462d6",
"status": "affected",
"version": "622ceaddb7649ca328832f50ba1400af778d75fa",
"versionType": "git"
},
{
"lessThan": "c9b47e6b23114e939b17f818471c7a46e59006e7",
"status": "affected",
"version": "622ceaddb7649ca328832f50ba1400af778d75fa",
"versionType": "git"
}
]
},
{
"defaultStatus": "affected",
"product": "Linux",
"programFiles": [
"fs/erofs/Kconfig",
"fs/erofs/decompressor_lzma.c"
],
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"versions": [
{
"status": "affected",
"version": "5.16"
},
{
"lessThan": "5.16",
"status": "unaffected",
"version": "0",
"versionType": "semver"
},
{
"lessThanOrEqual": "6.1.*",
"status": "unaffected",
"version": "6.1.184",
"versionType": "semver"
},
{
"lessThanOrEqual": "6.6.*",
"status": "unaffected",
"version": "6.6.151",
"versionType": "semver"
},
{
"lessThanOrEqual": "6.12.*",
"status": "unaffected",
"version": "6.12.103",
"versionType": "semver"
},
{
"lessThanOrEqual": "6.18.*",
"status": "unaffected",
"version": "6.18.44",
"versionType": "semver"
},
{
"lessThanOrEqual": "7.1.*",
"status": "unaffected",
"version": "7.1.8",
"versionType": "semver"
},
{
"lessThanOrEqual": "*",
"status": "unaffected",
"version": "7.2",
"versionType": "original_commit_for_fix"
}
]
}
],
"cpeApplicability": [
{
"nodes": [
{
"cpeMatch": [
{
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"versionEndExcluding": "6.1.184",
"versionStartIncluding": "5.16",
"vulnerable": true
},
{
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"versionEndExcluding": "6.6.151",
"versionStartIncluding": "5.16",
"vulnerable": true
},
{
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"versionEndExcluding": "6.12.103",
"versionStartIncluding": "5.16",
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},
{
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"versionEndExcluding": "6.18.44",
"versionStartIncluding": "5.16",
"vulnerable": true
},
{
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"versionEndExcluding": "7.1.8",
"versionStartIncluding": "5.16",
"vulnerable": true
},
{
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"versionEndExcluding": "7.2",
"versionStartIncluding": "5.16",
"vulnerable": true
}
],
"negate": false,
"operator": "OR"
}
]
}
],
"descriptions": [
{
"lang": "en",
"value": "In the Linux kernel, the following vulnerability has been resolved:\n\nerofs: cap LZMA stream pool size\n\nfs/erofs/decompressor_lzma.c sizes the module-global MicroLZMA stream\npool from num_possible_cpus() when the lzma_streams module parameter is\nunset, then z_erofs_load_lzma_config() preallocates one image-supplied\ndictionary per stream, accepting dictionaries up to 8 MiB. 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."
}
],
"providerMetadata": {
"dateUpdated": "2026-09-04T17:11:08.391Z",
"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"shortName": "Linux"
},
"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"
}
}
},
"cveMetadata": {
"assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"assignerShortName": "Linux",
"cveId": "CVE-2026-80892",
"datePublished": "2026-09-04T17:11:08.391Z",
"dateReserved": "2026-08-26T14:34:25.800Z",
"dateUpdated": "2026-09-04T17:11:08.391Z",
"state": "PUBLISHED"
},
"dataType": "CVE_RECORD",
"dataVersion": "5.2",
"vulnerability-lookup:meta": {
"nvd": "{\"cve\":{\"id\":\"CVE-2026-80892\",\"sourceIdentifier\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"published\":\"2026-09-04T18:17:57.337\",\"lastModified\":\"2026-09-04T18:17:57.337\",\"vulnStatus\":\"Received\",\"cveTags\":[],\"descriptions\":[{\"lang\":\"en\",\"value\":\"In the Linux kernel, the following vulnerability has been resolved:\\n\\nerofs: cap LZMA stream pool size\\n\\nfs/erofs/decompressor_lzma.c sizes the module-global MicroLZMA stream\\npool from num_possible_cpus() when the lzma_streams module parameter is\\nunset, then z_erofs_load_lzma_config() preallocates one image-supplied\\ndictionary per stream, accepting dictionaries up to 8 MiB. 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\":[{\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"affectedData\":[{\"vendor\":\"Linux\",\"product\":\"Linux\",\"defaultStatus\":\"unaffected\",\"programFiles\":[\"fs/erofs/Kconfig\",\"fs/erofs/decompressor_lzma.c\"],\"repo\":\"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\",\"versions\":[{\"version\":\"622ceaddb7649ca328832f50ba1400af778d75fa\",\"lessThan\":\"682cb3ece37fc5141e73bc726ccf4adb833e5189\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"622ceaddb7649ca328832f50ba1400af778d75fa\",\"lessThan\":\"e8b3d09aa8889dda9be9cbb3d2f0218c4b9acde4\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"622ceaddb7649ca328832f50ba1400af778d75fa\",\"lessThan\":\"0c676903cb2a61992ded8e7907609cc6b0f11744\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"622ceaddb7649ca328832f50ba1400af778d75fa\",\"lessThan\":\"5aaa06dfc10f8398c8807453dbec738ea9af10e4\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"622ceaddb7649ca328832f50ba1400af778d75fa\",\"lessThan\":\"e52da169b8c0d19bb2d803f2a07fe0e5a00462d6\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"622ceaddb7649ca328832f50ba1400af778d75fa\",\"lessThan\":\"c9b47e6b23114e939b17f818471c7a46e59006e7\",\"versionType\":\"git\",\"status\":\"affected\"}]},{\"vendor\":\"Linux\",\"product\":\"Linux\",\"defaultStatus\":\"affected\",\"programFiles\":[\"fs/erofs/Kconfig\",\"fs/erofs/decompressor_lzma.c\"],\"repo\":\"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\",\"versions\":[{\"version\":\"5.16\",\"status\":\"affected\"},{\"version\":\"0\",\"lessThan\":\"5.16\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"6.1.184\",\"lessThanOrEqual\":\"6.1.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"6.6.151\",\"lessThanOrEqual\":\"6.6.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"6.12.103\",\"lessThanOrEqual\":\"6.12.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"6.18.44\",\"lessThanOrEqual\":\"6.18.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"7.1.8\",\"lessThanOrEqual\":\"7.1.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"7.2\",\"lessThanOrEqual\":\"*\",\"versionType\":\"original_commit_for_fix\",\"status\":\"unaffected\"}]}]}],\"metrics\":{},\"references\":[{\"url\":\"https://git.kernel.org/stable/c/0c676903cb2a61992ded8e7907609cc6b0f11744\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/5aaa06dfc10f8398c8807453dbec738ea9af10e4\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/682cb3ece37fc5141e73bc726ccf4adb833e5189\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/c9b47e6b23114e939b17f818471c7a46e59006e7\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/e52da169b8c0d19bb2d803f2a07fe0e5a00462d6\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/e8b3d09aa8889dda9be9cbb3d2f0218c4b9acde4\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"}]}}",
"suse_vex": {
"aggregate_severity": "moderate",
"current_release_date": "2026-09-05T00:25:09Z",
"cve": "CVE-2026-80892",
"id": "CVE-2026-80892",
"initial_release_date": "2026-09-05T00:25:09Z",
"product_status:known_affected": "114",
"product_status:known_not_affected": "239",
"source": "SUSE CSAF VEX",
"status": "interim",
"title": "SUSE CVE CVE-2026-80892",
"url": "https://ftp.suse.com/pub/projects/security/csaf-vex/cve-2026-80892.json",
"version": "2"
}
}
}
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Experimental. This forecast is provided for visualization only and may change without notice. Do not use it for operational decisions.
Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.
Sightings
| Author | Source | Type | Date | Other |
|---|
Nomenclature
- Seen: The vulnerability was mentioned, discussed, or observed by the user.
- Confirmed: The vulnerability has been validated from an analyst's perspective.
- Published Proof of Concept: A public proof of concept is available for this vulnerability.
- Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
- Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
- Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
- Not confirmed: The user expressed doubt about the validity of the vulnerability.
- Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.
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The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the
vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base
model, served locally by ML-Gateway.
They have not been verified by an analyst and are provided for guidance only.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
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