VulnerabilityPublished 17 Sep 2026Updated 30 Oct 2026

CVE-2026-90150: Linux kernel · pnfs/blocklayout: Fix device leaks on parse failure

Source GCVE Database

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Authoritative record:CVE-2026-90150· Low

Not known to be exploited · fixed in c056f817e4200fb18079d5052c273a22f191ff0a : update Linux kernel when convenient.

Data as of 30 Oct 2026, 19:03 UTC

Severity

Low

Rated Low by Threat Radar's AI analysis · CVSS not yet scored by NVD

Thin evidence

One scorer or none

Patch: Available – fixed in c056f817e4200fb18079d5052c273a22f191ff0a, 710ae187a5d490a894054d17645cf5c83d37dfbf, 51d162dfb618f6cf3aa5e331c0305e27771ad884 +3

Exploitation evidence

Disclosed: evidence found.
CVE published 17 Sep 2026
Detectable: no evidence on record.
No public nuclei template indexed
Weaponized: 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 30 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.
Weaponized: A Metasploit exploit module or Exploit-DB entry exists (Metasploit scanner modules do not count), 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-qj3f-qfg4-pxhf

What to do

Upgrade to a fixed release listed under Affected software.

Affected software

Product	Affected	Fixed in
LinuxLinux	Affected ≥ 5c83746a0cf2831d4b59f5cf99ef5fbf138564e4, < c056f817e4200fb18079d5052c273a22f191ff0a	Fixed in c056f817e4200fb18079d5052c273a22f191ff0a
LinuxLinux	Affected ≥ 5c83746a0cf2831d4b59f5cf99ef5fbf138564e4, < 710ae187a5d490a894054d17645cf5c83d37dfbf	Fixed in 710ae187a5d490a894054d17645cf5c83d37dfbf
LinuxLinux	Affected ≥ 5c83746a0cf2831d4b59f5cf99ef5fbf138564e4, < 51d162dfb618f6cf3aa5e331c0305e27771ad884	Fixed in 51d162dfb618f6cf3aa5e331c0305e27771ad884
LinuxLinux	Affected ≥ 5c83746a0cf2831d4b59f5cf99ef5fbf138564e4, < 23e4162405c456ce12c772d5882d306135e828ae	Fixed in 23e4162405c456ce12c772d5882d306135e828ae
LinuxLinux	Affected ≥ 5c83746a0cf2831d4b59f5cf99ef5fbf138564e4, < 8a2494964edac2a13e82441c2bf887548dc3be0b	Fixed in 8a2494964edac2a13e82441c2bf887548dc3be0b
LinuxLinux	Affected ≥ 5c83746a0cf2831d4b59f5cf99ef5fbf138564e4, < 1e1c36b206c659cf94c6755a1d821ed1babd32bc	Fixed in 1e1c36b206c659cf94c6755a1d821ed1babd32bc

AI-suggested

A fix has been implemented in the Linux kernel to properly release child device arrays on parse failures and to clean up partially initialized devices. Users should update to the fixed kernel versions once available. No additional mitigation actions are indicated.

Description

A memory management issue in the Linux kernel's pnfs/blocklayout subsystem was fixed to prevent device leaks when parsing child devices fails. The flaw involved failure to properly release allocated child device arrays on parse errors, potentially leading to resource leaks.

Impact

The vulnerability could cause resource leaks in the kernel's block layout device management, potentially leading to increased memory usage or resource exhaustion over time. There is no indication of direct security compromise or exploitation in the wild.

Summary

The Linux kernel's pnfs/blocklayout code had a vulnerability where functions bl_parse_concat() and bl_parse_stripe() allocated arrays for child devices but did not correctly count failed children in nr_children. This caused bl_free_device() to skip releasing the children array if nr_children was zero, resulting in device leaks. The fix ensures that failed children and already parsed children are released before returning errors. Additionally, bl_free_device() was updated to always release the child array if the children pointer is set, cleaning up partially initialized devices. bl_parse_scsi() was also corrected to clear pointers after dropping file references to avoid double cleanup.

References

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