Vulnerability-Lookup

FKIE_CVE-2026-23388

Vulnerability from fkie_nvd - Published: 2026-03-25 11:16 - Updated: 2026-04-24 18:45

Severity ?

7.1 (High) - CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:H

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

URL	Tags
416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/01ee0bcc29864b78249308e8b35042b09bbf5fe3	Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/0c8ab092aec3ac4294940054772d30b511b16713	Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/3b9499e7d677dd4366239a292238489a804936b2	Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/3f68a9457a6190814377577374da75f872e0a013	Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/60f679f643f3f36a8571ea585e4ce5d93ef952b5	Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/6b847d65f5b0065e02080c61fad93d57d6686383	Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/9e9fa5ad37c9cbad73c165c7ff1e76e650825e7c	Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/fdb24a820a5832ec4532273282cbd4f22c291a0d	Patch

Impacted products

Vendor	Product	Version
linux	linux_kernel	*
linux	linux_kernel	*
linux	linux_kernel	*
linux	linux_kernel	*
linux	linux_kernel	*
linux	linux_kernel	*
linux	linux_kernel	*
linux	linux_kernel	2.6.29
linux	linux_kernel	7.0
linux	linux_kernel	7.0
linux	linux_kernel	7.0
linux	linux_kernel	7.0
linux	linux_kernel	7.0
linux	linux_kernel	7.0
linux	linux_kernel	7.0

JSON

To clipboard

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          "baseSeverity": "HIGH",
          "confidentialityImpact": "HIGH",
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CVE-2026-23388 (GCVE-0-2026-23388)

Vulnerability from cvelistv5 – Published: 2026-03-25 10:28 – Updated: 2026-05-11 22:05

Title

Squashfs: check metadata block offset is within range

Summary

Severity ?

No CVSS data available.

Assigner

Linux

References

8 references

URL	Tags
https://git.kernel.org/stable/c/60f679f643f3f36a8…
https://git.kernel.org/stable/c/3f68a9457a6190814…
https://git.kernel.org/stable/c/0c8ab092aec3ac429…
https://git.kernel.org/stable/c/6b847d65f5b0065e0…
https://git.kernel.org/stable/c/9e9fa5ad37c9cbad7…
https://git.kernel.org/stable/c/01ee0bcc29864b782…
https://git.kernel.org/stable/c/3b9499e7d677dd436…
https://git.kernel.org/stable/c/fdb24a820a5832ec4…

Impacted products

2 products

Vendor	Product	Version
Linux	Linux	Affected: f400e12656ab518be107febfe2315fb1eab5a342 , < 60f679f643f3f36a8571ea585e4ce5d93ef952b5 (git) Affected: f400e12656ab518be107febfe2315fb1eab5a342 , < 3f68a9457a6190814377577374da75f872e0a013 (git) Affected: f400e12656ab518be107febfe2315fb1eab5a342 , < 0c8ab092aec3ac4294940054772d30b511b16713 (git) Affected: f400e12656ab518be107febfe2315fb1eab5a342 , < 6b847d65f5b0065e02080c61fad93d57d6686383 (git) Affected: f400e12656ab518be107febfe2315fb1eab5a342 , < 9e9fa5ad37c9cbad73c165c7ff1e76e650825e7c (git) Affected: f400e12656ab518be107febfe2315fb1eab5a342 , < 01ee0bcc29864b78249308e8b35042b09bbf5fe3 (git) Affected: f400e12656ab518be107febfe2315fb1eab5a342 , < 3b9499e7d677dd4366239a292238489a804936b2 (git) Affected: f400e12656ab518be107febfe2315fb1eab5a342 , < fdb24a820a5832ec4532273282cbd4f22c291a0d (git)
Linux	Linux	Affected: 2.6.29 Unaffected: 0 , < 2.6.29 (semver) Unaffected: 5.10.253 , ≤ 5.10.* (semver) Unaffected: 5.15.203 , ≤ 5.15.* (semver) Unaffected: 6.1.167 , ≤ 6.1.* (semver) Unaffected: 6.6.130 , ≤ 6.6.* (semver) Unaffected: 6.12.77 , ≤ 6.12.* (semver) Unaffected: 6.18.17 , ≤ 6.18.* (semver) Unaffected: 6.19.7 , ≤ 6.19.* (semver) Unaffected: 7.0 , ≤ * (original_commit_for_fix)

Show details on NVD website

JSON

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{
  "containers": {
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        {
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          "programFiles": [
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      "title": "Squashfs: check metadata block offset is within range",
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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": "2026-05-11T22:05:54.748Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}

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.

Detection rules are retrieved from Rulezet.

Action not permitted

FKIE_CVE-2026-23388

CVE-2026-23388 (GCVE-0-2026-23388)

Tags

Sightings

Nomenclature