Strix
73.1K

CVE-2026-99036

UnknownEPSS 0.21%

Last modified

CVE-2026-99036 is a vulnerability of currently unknown severity. In the Linux kernel, the following vulnerability has been resolved: dm: fix reading free memory in do_resume When do_resume calls dm_table_get_mode(new_map), the call is done without holding any locks (it only holds a reference to the md). It may be possible that another concurrent ioctl on the same device will swap table after dm_swap_table and before dm_table_get_mode. EPSS estimates a 0.21% chance of exploitation in the next 30 days.

Description

In the Linux kernel, the following vulnerability has been resolved: dm: fix reading free memory in do_resume When do_resume calls dm_table_get_mode(new_map), the call is done without holding any locks (it only holds a reference to the md). It may be possible that another concurrent ioctl on the same device will swap table after dm_swap_table and before dm_table_get_mode. In this case, dm_table_get_mode(new_map) reads freed memory. This race condition was triggered by syzbot. This commit fixes the race by reading mode of the new table before dm_swap_table. Note that new_map is also passed to dm_ima_need_measure, but this function doesn't attempt to dereference it, so this call should be safe. Note that this is not a security bug because only root can trigger it and the commonly used tools such as lvm or cryptsetup do not call the ioctls concurrently, so that they can't trigger it acceidentally.

Metrics

EPSS Probability
0.21%

11.2th percentile

Probability of exploitation in the next 30 days. Learn more

Affected Software

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

VendorProductVersions
LinuxLinux>= d58168763f74d1edbc296d7038c60efe6493fdd4, < 2bc5df0cf906f36a8f59ac864139ee2b7b53d3c0; >= d58168763f74d1edbc296d7038c60efe6493fdd4, < 48169328021dfd59121f9a66cca919b7defcd3fa; >= d58168763f74d1edbc296d7038c60efe6493fdd4, < 7a272c2338f758e3b6e664ebf7488ac40f48a2a4; >= d58168763f74d1edbc296d7038c60efe6493fdd4, < 281f68d6cf8acb2547ebf0a849b8beae8fb0ec3c; >= d58168763f74d1edbc296d7038c60efe6493fdd4, < 2c96d1a8324e7736e0f8a5790ecf39d36c2c4a82; >= d58168763f74d1edbc296d7038c60efe6493fdd4, < e3bf232c913b7e0103d323f15e6342d37cb1b357; >= d58168763f74d1edbc296d7038c60efe6493fdd4, < 301691c32b8ad023e3316d5dbb6a8cf52d47b0dc; >= d58168763f74d1edbc296d7038c60efe6493fdd4, < c9417c1c5269e2bd0570fbe53e4ec03a8d31f008
LinuxLinux2.6.29

References

Timeline

Published
Last Modified
Status
Received

Frequently Asked Questions

What is CVE-2026-99036?
In the Linux kernel, the following vulnerability has been resolved: dm: fix reading free memory in do_resume When do_resume calls dm_table_get_mode(new_map), the call is done without holding any locks (it only holds a reference to the md). It may be possible that another concurrent ioctl on the same device will swap table after dm_swap_table and before dm_table_get_mode. In this case, dm_table_get_mode(new_map) reads freed memory. This race condition was triggered by syzbot. This commit fixes the race by reading mode of the new table before dm_swap_table. Note that new_map is also passed to dm_ima_need_measure, but this function doesn't attempt to dereference it, so this call should be safe. Note that this is not a security bug because only root can trigger it and the commonly used tools such as lvm or cryptsetup do not call the ioctls concurrently, so that they can't trigger it acceidentally.
How severe is CVE-2026-99036?
Severity scoring for CVE-2026-99036 is pending analysis. The EPSS model estimates a 0.21% probability of exploitation in the next 30 days.
How do I fix CVE-2026-99036?
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.

How Strix Helps

Related CVEs from 2026

View all 2026CVEs →

Are you affected by CVE-2026-99036?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST