CVE-2026-23388 (GCVE-0-2026-23388)
Vulnerability from cvelistv5
Published
2026-03-25 10:28
Modified
2026-04-18 08:58
Severity ?
VLAI Severity ?
EPSS score ?
Summary
In the Linux kernel, the following vulnerability has been resolved:
Squashfs: check metadata block offset is within range
Syzkaller reports a "general protection fault in squashfs_copy_data"
This is ultimately caused by a corrupted index look-up table, which
produces a negative metadata block offset.
This is subsequently passed to squashfs_copy_data (via
squashfs_read_metadata) where the negative offset causes an out of bounds
access.
The fix is to check that the offset is within range in
squashfs_read_metadata. This will trap this and other cases.
References
Impacted products
| Vendor | Product | Version | ||
|---|---|---|---|---|
| Linux | Linux |
Version: f400e12656ab518be107febfe2315fb1eab5a342 Version: f400e12656ab518be107febfe2315fb1eab5a342 Version: f400e12656ab518be107febfe2315fb1eab5a342 Version: f400e12656ab518be107febfe2315fb1eab5a342 Version: f400e12656ab518be107febfe2315fb1eab5a342 Version: f400e12656ab518be107febfe2315fb1eab5a342 Version: f400e12656ab518be107febfe2315fb1eab5a342 Version: f400e12656ab518be107febfe2315fb1eab5a342 |
||
{
"containers": {
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{
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"programFiles": [
"fs/squashfs/cache.c"
],
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],
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"vendor": "Linux",
"versions": [
{
"status": "affected",
"version": "2.6.29"
},
{
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"status": "unaffected",
"version": "0",
"versionType": "semver"
},
{
"lessThanOrEqual": "5.10.*",
"status": "unaffected",
"version": "5.10.253",
"versionType": "semver"
},
{
"lessThanOrEqual": "5.15.*",
"status": "unaffected",
"version": "5.15.203",
"versionType": "semver"
},
{
"lessThanOrEqual": "6.1.*",
"status": "unaffected",
"version": "6.1.167",
"versionType": "semver"
},
{
"lessThanOrEqual": "6.6.*",
"status": "unaffected",
"version": "6.6.130",
"versionType": "semver"
},
{
"lessThanOrEqual": "6.12.*",
"status": "unaffected",
"version": "6.12.77",
"versionType": "semver"
},
{
"lessThanOrEqual": "6.18.*",
"status": "unaffected",
"version": "6.18.17",
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},
{
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"status": "unaffected",
"version": "6.19.7",
"versionType": "semver"
},
{
"lessThanOrEqual": "*",
"status": "unaffected",
"version": "7.0",
"versionType": "original_commit_for_fix"
}
]
}
],
"cpeApplicability": [
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"negate": false,
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],
"descriptions": [
{
"lang": "en",
"value": "In the Linux kernel, the following vulnerability has been resolved:\n\nSquashfs: check metadata block offset is within range\n\nSyzkaller reports a \"general protection fault in squashfs_copy_data\"\n\nThis is ultimately caused by a corrupted index look-up table, which\nproduces a negative metadata block offset.\n\nThis is subsequently passed to squashfs_copy_data (via\nsquashfs_read_metadata) where the negative offset causes an out of bounds\naccess.\n\nThe fix is to check that the offset is within range in\nsquashfs_read_metadata. This will trap this and other cases."
}
],
"providerMetadata": {
"dateUpdated": "2026-04-18T08:58:25.502Z",
"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"shortName": "Linux"
},
"references": [
{
"url": "https://git.kernel.org/stable/c/60f679f643f3f36a8571ea585e4ce5d93ef952b5"
},
{
"url": "https://git.kernel.org/stable/c/3f68a9457a6190814377577374da75f872e0a013"
},
{
"url": "https://git.kernel.org/stable/c/0c8ab092aec3ac4294940054772d30b511b16713"
},
{
"url": "https://git.kernel.org/stable/c/6b847d65f5b0065e02080c61fad93d57d6686383"
},
{
"url": "https://git.kernel.org/stable/c/9e9fa5ad37c9cbad73c165c7ff1e76e650825e7c"
},
{
"url": "https://git.kernel.org/stable/c/01ee0bcc29864b78249308e8b35042b09bbf5fe3"
},
{
"url": "https://git.kernel.org/stable/c/3b9499e7d677dd4366239a292238489a804936b2"
},
{
"url": "https://git.kernel.org/stable/c/fdb24a820a5832ec4532273282cbd4f22c291a0d"
}
],
"title": "Squashfs: check metadata block offset is within range",
"x_generator": {
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}
},
"cveMetadata": {
"assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"assignerShortName": "Linux",
"cveId": "CVE-2026-23388",
"datePublished": "2026-03-25T10:28:06.224Z",
"dateReserved": "2026-01-13T15:37:46.008Z",
"dateUpdated": "2026-04-18T08:58:25.502Z",
"state": "PUBLISHED"
},
"dataType": "CVE_RECORD",
"dataVersion": "5.2"
}
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Sightings
| Author | Source | Type | Date |
|---|
Nomenclature
- Seen: The vulnerability was mentioned, discussed, or seen somewhere by the user.
- Confirmed: The vulnerability is confirmed from an analyst perspective.
- Published Proof of Concept: A public proof of concept is available for this vulnerability.
- Exploited: This vulnerability was exploited and seen by the user reporting the sighting.
- Patched: This vulnerability was successfully patched by the user reporting the sighting.
- Not exploited: This vulnerability was not exploited or seen by the user reporting the sighting.
- Not confirmed: The user expresses doubt about the veracity of the vulnerability.
- Not patched: This vulnerability was not successfully patched by the user reporting the sighting.
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