CVE-2022-50864 (GCVE-0-2022-50864)
Vulnerability from cvelistv5 – Published: 2025-12-30 12:15 – Updated: 2026-05-11 19:26
VLAI
EPSS
VEX
Title
nilfs2: fix shift-out-of-bounds due to too large exponent of block size
Summary
In the Linux kernel, the following vulnerability has been resolved:
nilfs2: fix shift-out-of-bounds due to too large exponent of block size
If field s_log_block_size of superblock data is corrupted and too large,
init_nilfs() and load_nilfs() still can trigger a shift-out-of-bounds
warning followed by a kernel panic (if panic_on_warn is set):
shift exponent 38973 is too large for 32-bit type 'int'
Call Trace:
<TASK>
dump_stack_lvl+0xcd/0x134
ubsan_epilogue+0xb/0x50
__ubsan_handle_shift_out_of_bounds.cold.12+0x17b/0x1f5
init_nilfs.cold.11+0x18/0x1d [nilfs2]
nilfs_mount+0x9b5/0x12b0 [nilfs2]
...
This fixes the issue by adding and using a new helper function for getting
block size with sanity check.
Severity
No CVSS data available.
Assigner
References
Impacted products
2 products
| Vendor | Product | Version | CPE status | |
|---|---|---|---|---|
| Linux | Linux |
Affected:
8a9d2191e9f43bbcd256a9a6871bd73434c83f2f , < ec93b5430ec0f60877a5388bb023d60624f9ab9f
(git)
Affected: 8a9d2191e9f43bbcd256a9a6871bd73434c83f2f , < 8b6ef451b5701b37d9a5905534595776a662edfc (git) Affected: 8a9d2191e9f43bbcd256a9a6871bd73434c83f2f , < ddb6615a168f97b91175e00eda4c644741cf531c (git) Affected: 8a9d2191e9f43bbcd256a9a6871bd73434c83f2f , < a16731fa1b96226c75bbf18e73513b14fc318360 (git) Affected: 8a9d2191e9f43bbcd256a9a6871bd73434c83f2f , < ebeccaaef67a4895d2496ab8d9c2fb8d89201211 (git) |
guessed | |
| Linux | Linux |
Affected:
2.6.30
Unaffected: 0 , < 2.6.30 (semver) Unaffected: 5.10.163 , ≤ 5.10.* (semver) Unaffected: 5.15.86 , ≤ 5.15.* (semver) Unaffected: 6.0.16 , ≤ 6.0.* (semver) Unaffected: 6.1.2 , ≤ 6.1.* (semver) Unaffected: 6.2 , ≤ * (original_commit_for_fix) |
guessed |
{
"containers": {
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"affected": [
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"programFiles": [
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"versions": [
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"version": "0",
"versionType": "semver"
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{
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{
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"status": "unaffected",
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},
{
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"version": "6.1.2",
"versionType": "semver"
},
{
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"status": "unaffected",
"version": "6.2",
"versionType": "original_commit_for_fix"
}
]
}
],
"cpeApplicability": [
{
"nodes": [
{
"cpeMatch": [
{
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
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"versionStartIncluding": "2.6.30",
"vulnerable": true
},
{
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
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},
{
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},
{
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
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"value": "In the Linux kernel, the following vulnerability has been resolved:\n\nnilfs2: fix shift-out-of-bounds due to too large exponent of block size\n\nIf field s_log_block_size of superblock data is corrupted and too large,\ninit_nilfs() and load_nilfs() still can trigger a shift-out-of-bounds\nwarning followed by a kernel panic (if panic_on_warn is set):\n\n shift exponent 38973 is too large for 32-bit type \u0027int\u0027\n Call Trace:\n \u003cTASK\u003e\n dump_stack_lvl+0xcd/0x134\n ubsan_epilogue+0xb/0x50\n __ubsan_handle_shift_out_of_bounds.cold.12+0x17b/0x1f5\n init_nilfs.cold.11+0x18/0x1d [nilfs2]\n nilfs_mount+0x9b5/0x12b0 [nilfs2]\n ...\n\nThis fixes the issue by adding and using a new helper function for getting\nblock size with sanity check."
}
],
"providerMetadata": {
"dateUpdated": "2026-05-11T19:26:35.896Z",
"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"shortName": "Linux"
},
"references": [
{
"url": "https://git.kernel.org/stable/c/ec93b5430ec0f60877a5388bb023d60624f9ab9f"
},
{
"url": "https://git.kernel.org/stable/c/8b6ef451b5701b37d9a5905534595776a662edfc"
},
{
"url": "https://git.kernel.org/stable/c/ddb6615a168f97b91175e00eda4c644741cf531c"
},
{
"url": "https://git.kernel.org/stable/c/a16731fa1b96226c75bbf18e73513b14fc318360"
},
{
"url": "https://git.kernel.org/stable/c/ebeccaaef67a4895d2496ab8d9c2fb8d89201211"
}
],
"title": "nilfs2: fix shift-out-of-bounds due to too large exponent of block size",
"x_generator": {
"engine": "bippy-1.2.0"
}
}
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"cveMetadata": {
"assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"assignerShortName": "Linux",
"cveId": "CVE-2022-50864",
"datePublished": "2025-12-30T12:15:36.489Z",
"dateReserved": "2025-12-30T12:06:07.135Z",
"dateUpdated": "2026-05-11T19:26:35.896Z",
"state": "PUBLISHED"
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"dataType": "CVE_RECORD",
"dataVersion": "5.2",
"vulnerability-lookup:meta": {
"epss": {
"cve": "CVE-2022-50864",
"date": "2026-09-20",
"epss": "0.00196",
"percentile": "0.09571"
},
"nvd": {
"cve": {
"affected": [
{
"affectedData": [
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{
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"version": "5.10.163",
"versionType": "semver"
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{
"lessThanOrEqual": "5.15.*",
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"version": "5.15.86",
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{
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}
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"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
}
],
"cveTags": [],
"descriptions": [
{
"lang": "en",
"value": "In the Linux kernel, the following vulnerability has been resolved:\n\nnilfs2: fix shift-out-of-bounds due to too large exponent of block size\n\nIf field s_log_block_size of superblock data is corrupted and too large,\ninit_nilfs() and load_nilfs() still can trigger a shift-out-of-bounds\nwarning followed by a kernel panic (if panic_on_warn is set):\n\n shift exponent 38973 is too large for 32-bit type \u0027int\u0027\n Call Trace:\n \u003cTASK\u003e\n dump_stack_lvl+0xcd/0x134\n ubsan_epilogue+0xb/0x50\n __ubsan_handle_shift_out_of_bounds.cold.12+0x17b/0x1f5\n init_nilfs.cold.11+0x18/0x1d [nilfs2]\n nilfs_mount+0x9b5/0x12b0 [nilfs2]\n ...\n\nThis fixes the issue by adding and using a new helper function for getting\nblock size with sanity check."
}
],
"id": "CVE-2022-50864",
"lastModified": "2026-06-17T05:24:19.050",
"metrics": {},
"published": "2025-12-30T13:16:01.207",
"references": [
{
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"url": "https://git.kernel.org/stable/c/8b6ef451b5701b37d9a5905534595776a662edfc"
},
{
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"url": "https://git.kernel.org/stable/c/a16731fa1b96226c75bbf18e73513b14fc318360"
},
{
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"url": "https://git.kernel.org/stable/c/ddb6615a168f97b91175e00eda4c644741cf531c"
},
{
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"url": "https://git.kernel.org/stable/c/ebeccaaef67a4895d2496ab8d9c2fb8d89201211"
},
{
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"url": "https://git.kernel.org/stable/c/ec93b5430ec0f60877a5388bb023d60624f9ab9f"
}
],
"sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"vulnStatus": "Deferred"
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},
"redhat_vex": {
"aggregate_severity": "None",
"current_release_date": "2026-06-30T10:23:58+00:00",
"cve": "CVE-2022-50864",
"id": "CVE-2022-50864",
"initial_release_date": "2022-01-01T00:00:00+00:00",
"product_status:known_not_affected": "274",
"source": "Red Hat CSAF VEX",
"status": "final",
"title": "kernel: nilfs2: fix shift-out-of-bounds due to too large exponent of block size",
"url": "https://security.access.redhat.com/data/csaf/v2/vex/2022/cve-2022-50864.json",
"version": "3"
}
}
}
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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.
Browse all ATT&CK techniques and the vulnerabilities related to each.
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.
Browse all ATT&CK techniques and the vulnerabilities related to each.
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Related by attack behaviour
Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.
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