VulnerabilityPublished 8 May 2026Updated 21 Oct 2026

CVE-2026-43317: Linux kernel · most: core: fix leak on early registration failure

Affects Linux kernelSource CVE Database V5

Not known to be exploited · fixed in f1ba620f9e8d7291f80c0554e4b820f5fb30e819 : update Linux kernel when convenient.

Data as of 26 Oct 2026, 14:18 UTC

Severity

Unrated

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

EPSS: 0.1% chance of exploitation in 30 days – higher than 1% of CVEsExploit Prediction Scoring System: the likelihood attackers will use this flaw soon.
Patch: Available – fixed in f1ba620f9e8d7291f80c0554e4b820f5fb30e819, bbfe49ffb892bddf32c34bea95b7ff0fc30affb5, 04474009a2ea7aa27c67d323952a23bb16d5acc5 +2

Exploitation evidence

Disclosed: evidence found.
CVE published 8 May 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.

What to do

Upgrade to a fixed release listed under Affected software.

Affected software

Product	Affected	Fixed in
LinuxLinux	Affected ≥ 723de0f9171eeb49a3ae98cae82ebbbb992b3a7c, < f1ba620f9e8d7291f80c0554e4b820f5fb30e819	Fixed in f1ba620f9e8d7291f80c0554e4b820f5fb30e819
LinuxLinux	Affected ≥ 723de0f9171eeb49a3ae98cae82ebbbb992b3a7c, < bbfe49ffb892bddf32c34bea95b7ff0fc30affb5	Fixed in bbfe49ffb892bddf32c34bea95b7ff0fc30affb5
LinuxLinux	Affected ≥ 723de0f9171eeb49a3ae98cae82ebbbb992b3a7c, < 04474009a2ea7aa27c67d323952a23bb16d5acc5	Fixed in 04474009a2ea7aa27c67d323952a23bb16d5acc5
LinuxLinux	Affected ≥ 723de0f9171eeb49a3ae98cae82ebbbb992b3a7c, < 5fd4396c2e48e90cc2597a86c18227d56ea845f0	Fixed in 5fd4396c2e48e90cc2597a86c18227d56ea845f0
LinuxLinux	Affected ≥ 723de0f9171eeb49a3ae98cae82ebbbb992b3a7c, < 2c198c272f9c9213b0fdf6b4a879f445c574f416	Fixed in 2c198c272f9c9213b0fdf6b4a879f445c574f416
LinuxLinux	Affected =5.6	Fixed in–

Description

In the Linux kernel, the following vulnerability has been resolved: most: core: fix leak on early registration failure A recent commit fixed a resource leak on early registration failures but for some reason left out the first error path which still leaks the resources associated with the interface. Fix up also the first error path so that the interface is always released on errors.

References

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