Quick answers
- Is CVE-2026-99087 exploited in the wild?
- No. Junglewise Threat Intelligence has no report of CVE-2026-99087 being exploited in the wild.
- How severe is CVE-2026-99087?
- Informational severity, published 23 October 2026.
- Which products and versions are affected?
- Linux Kernel all versions with dm-integrity bitmap mode support.
- Is there a fix for CVE-2026-99087?
- A patch was published on 2026-10-21. Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.
- How is CVE-2026-99087 attacked?
- It is attacked with local access, in an operating system.
- Am I affected by CVE-2026-99087?
- Check whether you run Linux Kernel at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.
Technical details
dm-integrity crashes in dm_integrity_resume() when attempting to write to a device that has been activated in read-only mode while the SB_FLAG_DIRTY_BITMAP flag is set. The vulnerability is triggered locally by mounting or resuming a dm-integrity device with conflicting flags, causing unprotected write operations on a read-only device. The fix adds a check to skip write operations when the device is in read-only mode.
Affected products
- Linux Linux kernel all versions with dm-integrity bitmap mode support
Timeline
- 2026-10-23: disclosed
- 2026-10-21: patched