dm-integrity: fix buffer overflow in inline mode with large tag size

MITRE NVD CVE.ORG JSON API

Summary

CVECVE-2026-99098
StatePUBLISHED
AssignerLinux
Source PriorityCVE Program / NVD first with legacy fallback
Published2026-10-26 15:16:48 UTC
Updated2026-10-26 15:16:48 UTC
DescriptionIn the Linux kernel, the following vulnerability has been resolved: dm-integrity: fix buffer overflow in inline mode with large tag size In inline mode, dm_integrity_check and dm_integrity_inline_recheck compute the checksum of each block into an on-stack buffer of HASH_MAX_DIGESTSIZE bytes. integrity_sector_checksum pads its result with zeroes up to the tag size, so if the tag size is larger than HASH_MAX_DIGESTSIZE, the padding runs past the end of the buffer. With CONFIG_STACKPROTECTOR the kernel panics in dm_integrity_check on the first read. Enlarge both buffers to hold MAX_TAG_SIZE bytes, as commit b93b6643e9b5 ("dm integrity: fix a crash with unusually large tag size") did for integrity_metadata. Note that this is not a security bug because the buffer overflow can only be triggered by root.

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA Linux Linux affected fb0987682c629c1d2c476f35f6fde405a5e304a4 3c7aad85aeb9e28386672e3a009aa2e61f751b86 git Not specified
CNA Linux Linux affected fb0987682c629c1d2c476f35f6fde405a5e304a4 4f0ee735dc68e3e6c4dd9a666d7f7047163c4165 git Not specified
CNA Linux Linux affected fb0987682c629c1d2c476f35f6fde405a5e304a4 f49cd7820cd0a96f20e1aa2708adb002124e38a7 git Not specified
CNA Linux Linux affected fb0987682c629c1d2c476f35f6fde405a5e304a4 764b683a6180fd72c931c13fea98d383506a3475 git Not specified
CNA Linux Linux affected 6.11 Not specified
CNA Linux Linux unaffected 6.11 semver Not specified
CNA Linux Linux unaffected 6.12.114 6.12.* semver Not specified
CNA Linux Linux unaffected 6.18.57 6.18.* semver Not specified
CNA Linux Linux unaffected 7.2.11 7.2.* semver Not specified
CNA Linux Linux unaffected 7.3 * original_commit_for_fix Not specified

References

ReferenceSourceLinkTags
git.kernel.org/stable/c/3c7aad85aeb9e28386672e3a009aa2e61f751b86 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/f49cd7820cd0a96f20e1aa2708adb002124e38a7 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/4f0ee735dc68e3e6c4dd9a666d7f7047163c4165 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/764b683a6180fd72c931c13fea98d383506a3475 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
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NVD vulnerability detail NVD nvd.nist.gov canonical, analysis

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