VulnerabilityPublished 23 Oct 2026

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

Source GCVE Database

Authoritative record:CVE-2026-99087· Medium

Not known to be exploited · fixed in 69ed43ed8a174465fca1ba6bfbde53e4618c8956 : update Linux kernel when convenient.

Data as of 26 Oct 2026, 17:16 UTC

Severity

Medium

Rated by Threat Radar · CVSS not yet scored by NVD

EPSS: 0.1% chance of exploitation in 30 days – higher than 5% of CVEsExploit Prediction Scoring System: the likelihood attackers will use this flaw soon.
Patch: Available – fixed in 69ed43ed8a174465fca1ba6bfbde53e4618c8956, 7d4d4f3b668d708d94f62ecdd33ac330a6fd8a84, 2e25842f0e4423e0efb243f56153d842ed6b933f

Exploitation evidence

Disclosed: evidence found.
CVE published 23 Oct 2026
Detectable: no evidence on record.
No public nuclei template indexed
Weaponised: no evidence on record.
No public exploit code indexed in Metasploit or Exploit-DB
Exploited in the wildExploited: no evidence on record.
Not in CISA KEV and no source reports exploitation
Observed by OffSeq MirageSeen by Mirage: no evidence on record.
No attack traffic recorded by OffSeq Mirage sensors

A missing step is not evidence of safety. Sources: cve.org (opens in a new tab), the Metasploit, Exploit-DB and nuclei-templates index as of 26 Oct 2026.

Disclosed: The CVE record is public on cve.org. Its publication is t = 0.
Detectable: A public nuclei template can find exposed instances, for defenders and attackers alike.
Weaponised: Public exploit code exists in Metasploit or Exploit-DB, or CISA SSVC or the CVSS exploit maturity reports a public proof of concept.
Exploited in the wild: CISA KEV lists it, CISA SSVC rates exploitation active, or a source reports attacks.
Observed by OffSeq Mirage: OffSeq Mirage honeypot sensors recorded attack traffic for this CVE, or found exposed hosts without attack traffic.

Moments are spaced evenly, not to scale; a dashed line marks a gap of six months or more. Deltas count from t = 0. Sources that give only a date (CISA KEV, Exploit-DB, or a time of exactly 00:00Z) read “same day” rather than hours. Metasploit modules carry the flaw’s disclosure date, not their release date, and nuclei templates carry no date, so both appear above but not on the timeline.

ghsa-458p-v4rq-r32g

What to do

Upgrade Linux kernel to 69ed43ed8a174465fca1ba6bfbde53e4618c8956, 7d4d4f3b668d708d94f62ecdd33ac330a6fd8a84 or 2e25842f0e4423e0efb243f56153d842ed6b933f.

Affected software

Product	Affected	Fixed in
LinuxLinux	Affected ≥ 468dfca38b1a6fbdccd195d875599cb7c8875cd9, < 69ed43ed8a174465fca1ba6bfbde53e4618c8956	Fixed in 69ed43ed8a174465fca1ba6bfbde53e4618c8956
LinuxLinux	Affected ≥ 468dfca38b1a6fbdccd195d875599cb7c8875cd9, < 7d4d4f3b668d708d94f62ecdd33ac330a6fd8a84	Fixed in 7d4d4f3b668d708d94f62ecdd33ac330a6fd8a84
LinuxLinux	Affected ≥ 468dfca38b1a6fbdccd195d875599cb7c8875cd9, < 2e25842f0e4423e0efb243f56153d842ed6b933f	Fixed in 2e25842f0e4423e0efb243f56153d842ed6b933f
LinuxLinux	Affected =5.2	Fixed in–

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.

References

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