CVE-2024-26982Squashfs: check the inode number is not the invalid value of zero
Updated under an hour ago ()
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No exploitation reported and no EPSS estimate yet.
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In 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. [phillip@squashfs.org.uk: whitespace fix]
- CVSS
- 7.1 HIGH (v3.1, NVD)CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:H
- Weakness (CWE)
- Not given
- Known exploited
- Not in CISA's KEV catalog
- EPSS (exploitation in the next 30 days)
- Not loaded for this CVE
- Assigned by
- Linux
- NVD analysis
- Modified
- Record last updated
- Oct 15, 2026
- First seen by InfoSec Signals
- Oct 15, 2026
Affected products
Linux Linux linux:linux (from the name) | 6545b246a2c815a8fcd07d58240effb6ec3481b1 builds before 32c114a58236fe67141634774559f21f1dc96fd7; 6545b246a2c815a8fcd07d58240effb6ec3481b1 builds before 4a1b6f89825e267e156ccaeba3d235edcac77f94; from 6545b246a2c815a8fcd07d58240effb6ec3481b1 before cf46f88b92cfc0e32bd8a21ba1273cff13b8745f; 6545b246a2c815a8fcd07d58240effb6ec3481b1 builds before 5b99dea79650b50909c50aba24fbae00f203f013; from 6545b246a2c815a8fcd07d58240effb6ec3481b1 before be383effaee3d89034f0828038f95065b518772e; 6545b246a2c815a8fcd07d58240effb6ec3481b1 builds before 7def00ebc9f2d6a581ddf46ce4541f84a10680e5; from 6545b246a2c815a8fcd07d58240effb6ec3481b1 before 9253c54e01b6505d348afbc02abaa4d9f8a01395 | CNA record |
Siemens SIMATIC S7-1500 TM MFP - BIOS siemens:simatic_s7_1500_tm_mfp_bios (from the name) | all versions | CISA ADP |
Siemens SIMATIC S7-1500 TM MFP - GNU/Linux subsystem siemens:simatic_s7_1500_tm_mfp_gnu_linux_subsystem (from the name) | all versions | CISA ADP |
linux linux_kernel linux:linux_kernel | before 6.6.30; from 6.7 before 6.8.8; 6.9; 6.9; 6.9; 6.9 | NVD |
References
- https://git.kernel.org/stable/c/32c114a58236fe67141634774559f21f1dc96fd7
- https://git.kernel.org/stable/c/4a1b6f89825e267e156ccaeba3d235edcac77f94
- https://git.kernel.org/stable/c/cf46f88b92cfc0e32bd8a21ba1273cff13b8745f
- https://git.kernel.org/stable/c/5b99dea79650b50909c50aba24fbae00f203f013
- https://git.kernel.org/stable/c/be383effaee3d89034f0828038f95065b518772emailing-list, patch
- https://git.kernel.org/stable/c/7def00ebc9f2d6a581ddf46ce4541f84a10680e5mailing-list, patch
- https://git.kernel.org/stable/c/9253c54e01b6505d348afbc02abaa4d9f8a01395mailing-list, patch
- https://lists.debian.org/debian-lts-announce/2025/05/msg00030.html
- https://lists.debian.org/debian-lts-announce/2025/05/msg00045.html
- https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/4EZ6PJW7VOZ224TD7N4JZNU6KV32ZJ53/
- https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/DAMSOZXJEPUOXW33WZYWCVAY7Z5S7OOY/
- https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/GCBZZEC7L7KTWWAS2NLJK6SO3IZIL4WW/
- https://cert-portal.siemens.com/productcert/html/ssa-265688.html
- https://cert-portal.siemens.com/productcert/html/ssa-503939.html
- https://cert-portal.siemens.com/productcert/html/ssa-784472.html
The CVE record on cve.org NVD's entry
The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.