VulnerabilityPublished 18 Mar 2026Updated 5 Nov 2026

CVE-2026-23256: Linux kernel · net: liquidio: Fix off-by-one error in VF setup_nic_devices() cleanup

Affects Linux kernelSource CVE Database V5

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Not known to be exploited · fixed in bd680e56e316be92c01568be98d85d7a6c9bd92c : update Linux kernel when convenient.

Data as of 5 Nov 2026, 22:04 UTC

Severity

Unrated

Rated by Threat Radar · No CVSS score from NVD or the CNA

Thin evidence

One scorer or none

Exploitation: No evidence of active exploitation and no public proof of concept
Automatable: Attackers cannot reliably automate steps 1–4 of the kill chain
Technical impact: Limited control over the software or limited information exposure

CISA SSVC assessment, 2026-11-05.

Patch

Available – fixed in bd680e56e316be92c01568be98d85d7a6c9bd92c, 4640fa5ad5e1a0dbd1c2d22323b7d70a8107dcfd, 71a56b89203ec7e5670d94a61a9b4ae617eca804 +4

Exploitation evidence

Disclosed: evidence found.
CVE published 18 Mar 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 5 Nov 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.

What to do

Upgrade to a fixed release listed under Affected software.

Affected software

Product	Affected	Fixed in
LinuxLinux	Affected ≥ 846b46873eeb3baf40f7e6d8fe8f98aec95e7727, < bd680e56e316be92c01568be98d85d7a6c9bd92c	Fixed in bd680e56e316be92c01568be98d85d7a6c9bd92c
LinuxLinux	Affected ≥ 846b46873eeb3baf40f7e6d8fe8f98aec95e7727, < 4640fa5ad5e1a0dbd1c2d22323b7d70a8107dcfd	Fixed in 4640fa5ad5e1a0dbd1c2d22323b7d70a8107dcfd
LinuxLinux	Affected ≥ 846b46873eeb3baf40f7e6d8fe8f98aec95e7727, < 71a56b89203ec7e5670d94a61a9b4ae617eca804	Fixed in 71a56b89203ec7e5670d94a61a9b4ae617eca804
LinuxLinux	Affected ≥ 846b46873eeb3baf40f7e6d8fe8f98aec95e7727, < 52b19b3a22306fe452ec9e8ff96063f4bfb77b99	Fixed in 52b19b3a22306fe452ec9e8ff96063f4bfb77b99
LinuxLinux	Affected ≥ 846b46873eeb3baf40f7e6d8fe8f98aec95e7727, < 6cbba46934aefdfb5d171e0a95aec06c24f7ca30	Fixed in 6cbba46934aefdfb5d171e0a95aec06c24f7ca30
LinuxLinux	Affected ≥ 846b46873eeb3baf40f7e6d8fe8f98aec95e7727, < 3bf519e39b51cb08a93c0599870b35a23db1031e	Fixed in 3bf519e39b51cb08a93c0599870b35a23db1031e

Description

In the Linux kernel, the following vulnerability has been resolved: net: liquidio: Fix off-by-one error in VF setup_nic_devices() cleanup In setup_nic_devices(), the initialization loop jumps to the label setup_nic_dev_free on failure. The current cleanup loop while(i--) skip the failing index i, causing a memory leak. Fix this by changing the loop to iterate from the current index i down to 0. Compile tested only. Issue found using code review.

References

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