Squashfs: check the inode number is not the invalid value of zero

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Summary

CVECVE-2024-26982
StatePUBLISHED
AssignerLinux
Source PriorityCVE Program / NVD first with legacy fallback
Published2024-05-01 06:15:15 UTC
Updated2026-05-12 12:16:28 UTC
DescriptionIn the Linux kernel, the following vulnerability has been resolved: Squashfs: check the inode number is not the invalid value of zero Syskiller has produced an out of bounds access in fill_meta_index(). That out of bounds access is ultimately caused because the inode has an inode number with the invalid value of zero, which was not checked. The reason this causes the out of bounds access is due to following sequence of events: 1. Fill_meta_index() is called to allocate (via empty_meta_index()) and fill a metadata index. It however suffers a data read error and aborts, invalidating the newly returned empty metadata index. It does this by setting the inode number of the index to zero, which means unused (zero is not a valid inode number). 2. When fill_meta_index() is subsequently called again on another read operation, locate_meta_index() returns the previous index because it matches the inode number of 0. Because this index has been returned it is expected to have been filled, and because it hasn't been, an out of bounds access is performed. This patch adds a sanity check which checks that the inode number is not zero when the inode is created and returns -EINVAL if it is. [[email protected]: whitespace fix]

Risk And Classification

Primary CVSS: v3.1 7.1 HIGH from [email protected]

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:H

Problem Types: CWE-125

CVSS v3.1 Breakdown

Attack Vector
Local
Attack Complexity
Low
Privileges Required
Low
User Interaction
None
Scope
Unchanged
Confidentiality
High
Integrity
None
Availability
High

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:H

NVD Known Affected Configurations (CPE 2.3)

TypeVendorProductVersionUpdateEditionLanguage
Operating System Linux Linux Kernel All All All All

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA Linux Linux affected 6545b246a2c815a8fcd07d58240effb6ec3481b1 32c114a58236fe67141634774559f21f1dc96fd7 git Not specified
CNA Linux Linux affected 6545b246a2c815a8fcd07d58240effb6ec3481b1 4a1b6f89825e267e156ccaeba3d235edcac77f94 git Not specified
CNA Linux Linux affected 6545b246a2c815a8fcd07d58240effb6ec3481b1 cf46f88b92cfc0e32bd8a21ba1273cff13b8745f git Not specified
CNA Linux Linux affected 6545b246a2c815a8fcd07d58240effb6ec3481b1 5b99dea79650b50909c50aba24fbae00f203f013 git Not specified
CNA Linux Linux affected 6545b246a2c815a8fcd07d58240effb6ec3481b1 be383effaee3d89034f0828038f95065b518772e git Not specified
CNA Linux Linux affected 6545b246a2c815a8fcd07d58240effb6ec3481b1 7def00ebc9f2d6a581ddf46ce4541f84a10680e5 git Not specified
CNA Linux Linux affected 6545b246a2c815a8fcd07d58240effb6ec3481b1 9253c54e01b6505d348afbc02abaa4d9f8a01395 git Not specified
CNA Linux Linux affected 2.6.29 Not specified
CNA Linux Linux unaffected 2.6.29 semver Not specified
CNA Linux Linux unaffected 5.4.291 5.4.* semver Not specified
CNA Linux Linux unaffected 5.10.235 5.10.* semver Not specified
CNA Linux Linux unaffected 5.15.179 5.15.* semver Not specified
CNA Linux Linux unaffected 6.1.130 6.1.* semver Not specified
CNA Linux Linux unaffected 6.6.30 6.6.* semver Not specified
CNA Linux Linux unaffected 6.8.8 6.8.* semver Not specified
CNA Linux Linux unaffected 6.9 * original_commit_for_fix Not specified
ADP Siemens SIMATIC S7-1500 TM MFP - BIOS affected * custom Not specified
ADP Siemens SIMATIC S7-1500 TM MFP - GNU/Linux Subsystem affected * custom Not specified

References

ReferenceSourceLinkTags
lists.debian.org/debian-lts-announce/2025/05/msg00030.html af854a3a-2127-422b-91ae-364da2661108 lists.debian.org
cert-portal.siemens.com/productcert/html/ssa-503939.html 0b142b55-0307-4c5a-b3c9-f314f3fb7c5e cert-portal.siemens.com
git.kernel.org/stable/c/5b99dea79650b50909c50aba24fbae00f203f013 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
lists.fedoraproject.org/archives/list/[email protected]/messag... af854a3a-2127-422b-91ae-364da2661108 lists.fedoraproject.org
cert-portal.siemens.com/productcert/html/ssa-265688.html 0b142b55-0307-4c5a-b3c9-f314f3fb7c5e cert-portal.siemens.com
git.kernel.org/stable/c/cf46f88b92cfc0e32bd8a21ba1273cff13b8745f 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/7def00ebc9f2d6a581ddf46ce4541f84a10680e5 af854a3a-2127-422b-91ae-364da2661108 git.kernel.org Mailing List, Patch
lists.fedoraproject.org/archives/list/[email protected]/messag... af854a3a-2127-422b-91ae-364da2661108 lists.fedoraproject.org
git.kernel.org/stable/c/32c114a58236fe67141634774559f21f1dc96fd7 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/9253c54e01b6505d348afbc02abaa4d9f8a01395 af854a3a-2127-422b-91ae-364da2661108 git.kernel.org Mailing List, Patch
lists.debian.org/debian-lts-announce/2025/05/msg00045.html af854a3a-2127-422b-91ae-364da2661108 lists.debian.org
git.kernel.org/stable/c/4a1b6f89825e267e156ccaeba3d235edcac77f94 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
lists.fedoraproject.org/archives/list/[email protected]/messag... af854a3a-2127-422b-91ae-364da2661108 lists.fedoraproject.org
git.kernel.org/stable/c/be383effaee3d89034f0828038f95065b518772e af854a3a-2127-422b-91ae-364da2661108 git.kernel.org Mailing List, Patch
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