What’s Vulnerable › Vulnerabilities

CVE-2026-99087: dm-integrity: fix NULL pointer dereference when the 'R' flag is used

• Severity: unknown
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.2% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2026-10-23 · updated 2026-10-23

Description

In the Linux kernel, the following vulnerability has been resolved: dm-integrity: fix NULL pointer dereference when the 'R' flag is used If the dm-integrity device has the SB_FLAG_DIRTY_BITMAP flag set and the user activates the device in the 'R' mode, a crash in dm_integrity_resume happens because the function attempts to read the journal containing the bitmap. This patch makes dm-integrity skip any writes to the device in dm_integrity_resume if the device is activated in the 'R' mode.

Affected products

• Linux kernel: 5.2 — fixed in 7.3

How to fix

Upgrade to a fixed version: Linux kernel 7.3. Check the vendor advisory for mitigations.

References

• https://git.kernel.org/stable/c/2e25842f0e4423e0efb243f56153d842ed6b933f
• https://git.kernel.org/stable/c/69ed43ed8a174465fca1ba6bfbde53e4618c8956
• https://git.kernel.org/stable/c/7d4d4f3b668d708d94f62ecdd33ac330a6fd8a84

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