CVE-2026-99086 (GCVE-0-2026-99086)

Vulnerability from cvelistv5 – Published: 2026-10-23 12:45 – Updated: 2026-10-23 12:45
VLAI
Title
dm-integrity: validate the superblock on resume
Summary
In the Linux kernel, the following vulnerability has been resolved: dm-integrity: validate the superblock on resume dm_integrity_resume() re-reads the superblock from the device so that it picks up the flags and the recalculate position. It performs no validation on the result, while the constructor validates the superblock it reads and sizes all the in-memory structures according to it. The user may modify the superblock on the underlying device while the dm-integrity device is suspended, so that the two no longer agree. In particular, access_journal_data() shifts the journal entry index by ic->sb->log2_sectors_per_block, while ic->journal_section_sectors and the journal page list were computed with the value that was present at constructor time. Increasing log2_sectors_per_block makes the index run past the end of the journal, and dm-integrity then writes 512 bytes through lowmem_page_address(NULL). Snapshot the validated superblock in the constructor and refuse to resume if any of the fields that describe the on-disk geometry changed.
Severity
No CVSS data available.
Assigner
Linux CNA under the mitre root
CNA scorecard D 53/100 over 6653 records in the last 180 days details
References
Impacted products
Vendor Product Version CPE status
Linux Linux Affected: 38625191f32f77a9d5fc7cc15f4f9b78768bfb33 , < 454b67fcc28c18502e47dfb9f067b04c28628ada (git)
Affected: 118ba36e446c01e3cd34b3eedabf1d9436525e1d , < e9ec5cbbaf4dd3a02ae3d81719f4fcb9b609aa8e (git)
Affected: 118ba36e446c01e3cd34b3eedabf1d9436525e1d , < fc79aeb86a2c244c1f1894e2d8f2966fe2b60fa2 (git)
Affected: 824b9c27d7b600520b95f0cab95a47d1b08a9483 (git)
Affected: fb49f209995f729053c6ee728436f98d78a49b6f (git)
Affected: c6138af1f5454c2631a837916fda958ea72c0d71 (git)
Affected: 3ff70e2e31c419e2230d0c66cb2bfb3b1b414b7f (git)
Affected: 6.18.16 , < 6.18.58 (semver)
Affected: 6.1.165 , < 6.2 (semver)
Affected: 6.6.128 , < 6.7 (semver)
Affected: 6.12.75 , < 6.13 (semver)
Affected: 6.19.6 , < 6.20 (semver)
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Linux Linux Affected: 7.0
Unaffected: 0 , < 7.0 (semver)
Unaffected: 6.18.58 , ≤ 6.18.* (semver)
Unaffected: 7.2.12 , ≤ 7.2.* (semver)
Unaffected: 7.3 , ≤ * (original_commit_for_fix)
guessed Create a notification for this product.
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}



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