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CVE-2026-99135

UnknownEPSS 0.17%

Last modified

CVE-2026-99135 is a vulnerability of currently unknown severity. In the Linux kernel, the following vulnerability has been resolved: dm-integrity: fix infinite loop on discard with large tag size When integrity_metadata handles a discard, it fills a buffer with DISCARD_FILLER and writes it over the tags, max_blocks blocks at a time. If the kmalloc fails, the buffer is the on-stack array checksums_onstack and max_size is set to HASH_MAX_DIGESTSIZE. EPSS estimates a 0.17% chance of exploitation in the next 30 days.

Description

In the Linux kernel, the following vulnerability has been resolved: dm-integrity: fix infinite loop on discard with large tag size When integrity_metadata handles a discard, it fills a buffer with DISCARD_FILLER and writes it over the tags, max_blocks blocks at a time. If the kmalloc fails, the buffer is the on-stack array checksums_onstack and max_size is set to HASH_MAX_DIGESTSIZE. So if the tag size is larger than HASH_MAX_DIGESTSIZE, max_blocks is zero, bi_size is never decremented and the loop never terminates. Fix this by using sizeof(checksums_onstack) as max_size. The array has MAX_TAG_SIZE bytes since commit b93b6643e9b5 ("dm integrity: fix a crash with unusually large tag size"), so max_blocks is at least 1.

Metrics

EPSS Probability
0.17%

6.9th percentile

Probability of exploitation in the next 30 days. Learn more

Affected Software

Source: CNA advisory (CVE.org). NVD analysis pending.

VendorProductVersions
LinuxLinux>= 84597a44a9d86ac949900441cea7da0af0f2f473, < f41a224b3c9d66c7b59afc7cae02a8b214f3c684; >= 84597a44a9d86ac949900441cea7da0af0f2f473, < c66f5c6ccfa832d28b44a66c01e3468c246adac4; >= 84597a44a9d86ac949900441cea7da0af0f2f473, < 41a18e6c6e2c4a912494a035c17ecfe79c68b9e6; >= 84597a44a9d86ac949900441cea7da0af0f2f473, < bbc154a7da4e075aef720ef051aff6094400eb66; >= 84597a44a9d86ac949900441cea7da0af0f2f473, < c4cba6670fa199415689f67108e96b0ba469d767; >= 84597a44a9d86ac949900441cea7da0af0f2f473, < fc512700f1413fed652dac22fa1c4e837210b9c0; >= 84597a44a9d86ac949900441cea7da0af0f2f473, < 251b44b424920df9204e88a81fb3f78fa48ddd99; >= 84597a44a9d86ac949900441cea7da0af0f2f473, < 18d80c77b4c7dd20699e81cedfbbff4e9d198f28
LinuxLinux5.7

References

Timeline

Published
Last Modified
Status
Received

Frequently Asked Questions

What is CVE-2026-99135?
In the Linux kernel, the following vulnerability has been resolved: dm-integrity: fix infinite loop on discard with large tag size When integrity_metadata handles a discard, it fills a buffer with DISCARD_FILLER and writes it over the tags, max_blocks blocks at a time. If the kmalloc fails, the buffer is the on-stack array checksums_onstack and max_size is set to HASH_MAX_DIGESTSIZE. So if the tag size is larger than HASH_MAX_DIGESTSIZE, max_blocks is zero, bi_size is never decremented and the loop never terminates. Fix this by using sizeof(checksums_onstack) as max_size. The array has MAX_TAG_SIZE bytes since commit b93b6643e9b5 ("dm integrity: fix a crash with unusually large tag size"), so max_blocks is at least 1.
How severe is CVE-2026-99135?
Severity scoring for CVE-2026-99135 is pending analysis. The EPSS model estimates a 0.17% probability of exploitation in the next 30 days.
How do I fix CVE-2026-99135?
Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

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Source: NVD / NIST