CVE-2026-72099 (GCVE-0-2026-72099)
Vulnerability from cvelistv5
Published
2026-08-15 05:52
Modified
2026-08-23 12:46
Severity ?
VLAI Severity ?
EPSS score ?
Summary
In the Linux kernel, the following vulnerability has been resolved:
dm-integrity: don't increment hash_offset twice
hash_offset is already incremented in the loop "for (i = 0; i < to_copy;
i++, ts--)". Do not increment it again.
References
Impacted products
| Vendor | Product | Version | ||
|---|---|---|---|---|
| Linux | Linux |
Version: 84597a44a9d86ac949900441cea7da0af0f2f473 Version: 84597a44a9d86ac949900441cea7da0af0f2f473 Version: 84597a44a9d86ac949900441cea7da0af0f2f473 Version: 84597a44a9d86ac949900441cea7da0af0f2f473 Version: 84597a44a9d86ac949900441cea7da0af0f2f473 Version: 84597a44a9d86ac949900441cea7da0af0f2f473 Version: 84597a44a9d86ac949900441cea7da0af0f2f473 Version: 84597a44a9d86ac949900441cea7da0af0f2f473 |
||
{
"containers": {
"cna": {
"affected": [
{
"defaultStatus": "unaffected",
"product": "Linux",
"programFiles": [
"drivers/md/dm-integrity.c"
],
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"versions": [
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},
{
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],
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"vendor": "Linux",
"versions": [
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"status": "affected",
"version": "5.7"
},
{
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"status": "unaffected",
"version": "0",
"versionType": "semver"
},
{
"lessThanOrEqual": "5.10.*",
"status": "unaffected",
"version": "5.10.266",
"versionType": "semver"
},
{
"lessThanOrEqual": "5.15.*",
"status": "unaffected",
"version": "5.15.217",
"versionType": "semver"
},
{
"lessThanOrEqual": "6.1.*",
"status": "unaffected",
"version": "6.1.184",
"versionType": "semver"
},
{
"lessThanOrEqual": "6.6.*",
"status": "unaffected",
"version": "6.6.145",
"versionType": "semver"
},
{
"lessThanOrEqual": "6.12.*",
"status": "unaffected",
"version": "6.12.97",
"versionType": "semver"
},
{
"lessThanOrEqual": "6.18.*",
"status": "unaffected",
"version": "6.18.40",
"versionType": "semver"
},
{
"lessThanOrEqual": "7.1.*",
"status": "unaffected",
"version": "7.1.5",
"versionType": "semver"
},
{
"lessThanOrEqual": "*",
"status": "unaffected",
"version": "7.2",
"versionType": "original_commit_for_fix"
}
]
}
],
"cpeApplicability": [
{
"nodes": [
{
"cpeMatch": [
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"versionEndExcluding": "5.10.266",
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},
{
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],
"negate": false,
"operator": "OR"
}
]
}
],
"descriptions": [
{
"lang": "en",
"value": "In the Linux kernel, the following vulnerability has been resolved:\n\ndm-integrity: don\u0027t increment hash_offset twice\n\nhash_offset is already incremented in the loop \"for (i = 0; i \u003c to_copy;\ni++, ts--)\". Do not increment it again."
}
],
"metrics": [
{
"cvssV3_1": {
"baseScore": 7.1,
"baseSeverity": "HIGH",
"vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:L",
"version": "3.1"
},
"scenarios": [
{
"lang": "en",
"value": "AV:N - The flaw is reached via block I/O on dm-integrity journal/bitmap targets; in enterprise/cloud deployments those volumes are commonly accessed remotely through NFS/ksmbd file exports or iSCSI/NVMe-oF/NBD block protocols, letting a remote client drive the vulnerable TAG_CMP path.\nAC:L - An attacker with read access can reliably trigger TAG_CMP by issuing ordinary multi-sector reads; when metadata tag comparisons span dm-bufio buffer boundaries the double-incremented hash_offset mispredicts tag boundaries without races or uncontrollable layout.\nPR:L - Table creation needs CAP_SYS_ADMIN (obtainable in a user namespace), but exploitation only requires read/write access to the mapped block device or an exported filesystem backed by it, not init-namespace root.\nUI:N - Exploitation requires only attacker-initiated reads or writes against the dm-integrity-backed storage; no additional victim actions such as mounting a filesystem or opening files beyond the attacker\u0027s own I/O are needed.\nS:U - Impact is incorrect integrity-tag verification within the host kernel\u0027s device-mapper layer, enabling undetected data tampering or spurious verification failures on the same host; it does not cross VM, container, or IOMMU security boundaries.\nC:N - The bug corrupts tag-boundary state during comparison but does not cause kernel memory disclosure, out-of-bounds reads, or use-after-free; any wrong data returned is attacker-supplied disk content, not leakage of unrelated kernel or user secrets.\nI:H - Misaligned hash_offset can accept integrity tags that should fail verification (including mixed hash/discard-filler boundaries), defeating dm-integrity\u0027s tamper detection and allowing undetected modification of protected block data.\nA:L - The same logic error can spuriously fail checksum verification on legitimate reads, returning I/O errors and denying access to protected data without kernel panic, though repeated reads can sustain a denial-of-service against the volume."
}
]
}
],
"providerMetadata": {
"dateUpdated": "2026-08-23T12:46:49.483Z",
"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"shortName": "Linux"
},
"references": [
{
"url": "https://git.kernel.org/stable/c/c66b1781a54984227e94b862be9328d81d81e51c"
},
{
"url": "https://git.kernel.org/stable/c/39697e2759ac23e65361fe61482f8174cad8a752"
},
{
"url": "https://git.kernel.org/stable/c/e6646f4d711d74930d39cce6fb7bfcae4cbee5fd"
},
{
"url": "https://git.kernel.org/stable/c/cf9feed8c131e303ecf2afebe6f791be018818ad"
},
{
"url": "https://git.kernel.org/stable/c/4f4e43337e9ef322595201cfc24def50fd624219"
},
{
"url": "https://git.kernel.org/stable/c/5dfd8042635278613da3b88553e25ade2103cd58"
},
{
"url": "https://git.kernel.org/stable/c/829476c06496aab018f14127c055adb164d1a750"
},
{
"url": "https://git.kernel.org/stable/c/edf025f083854f80032b73a1aad69a3c90db236f"
}
],
"title": "dm-integrity: don\u0027t increment hash_offset twice",
"x_generator": {
"engine": "bippy-1.2.0"
}
}
},
"cveMetadata": {
"assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"assignerShortName": "Linux",
"cveId": "CVE-2026-72099",
"datePublished": "2026-08-15T05:52:44.292Z",
"dateReserved": "2026-08-09T03:40:39.905Z",
"dateUpdated": "2026-08-23T12:46:49.483Z",
"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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