VulnerabilityPublished 17 Sep 2026Updated 21 Oct 2026

CVE-2026-90337: Linux kernel · serial: core: do fallible allocations before the console can be registered

Affects Linux kernelSource CVE Database V5

Not known to be exploited · fixed in e2ddbfd826836cba1b7a25ee4eb512f7d752b703 : update Linux kernel when convenient.

Data as of 26 Oct 2026, 13:47 UTC

Severity

Unrated

Rated by Threat Radar · CVSS not yet scored by NVD

EPSS: 0.2% chance of exploitation in 30 days – higher than 10% of CVEsExploit Prediction Scoring System: the likelihood attackers will use this flaw soon.
Patch: Available – fixed in e2ddbfd826836cba1b7a25ee4eb512f7d752b703, c2aec15f78b2e6ccd9b94216a901248511355982, 9260a92ce90e6a95ce2ffdf1441c5216bf3f9552 +2

Exploitation evidence

Disclosed: evidence found.
CVE published 17 Sep 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 ≥ 266dcff03eed0050b6af11aaf2a61ab837d7ba3f, < e2ddbfd826836cba1b7a25ee4eb512f7d752b703	Fixed in e2ddbfd826836cba1b7a25ee4eb512f7d752b703
LinuxLinux	Affected ≥ 266dcff03eed0050b6af11aaf2a61ab837d7ba3f, < c2aec15f78b2e6ccd9b94216a901248511355982	Fixed in c2aec15f78b2e6ccd9b94216a901248511355982
LinuxLinux	Affected ≥ 266dcff03eed0050b6af11aaf2a61ab837d7ba3f, < 9260a92ce90e6a95ce2ffdf1441c5216bf3f9552	Fixed in 9260a92ce90e6a95ce2ffdf1441c5216bf3f9552
LinuxLinux	Affected ≥ 266dcff03eed0050b6af11aaf2a61ab837d7ba3f, < 8c7c75bfa7b84d6999de2100ce9c09e3779249a0	Fixed in 8c7c75bfa7b84d6999de2100ce9c09e3779249a0
LinuxLinux	Affected ≥ 266dcff03eed0050b6af11aaf2a61ab837d7ba3f, < 1a0e4fbce5d9c1bc179a35a2fd9ed142664299e3	Fixed in 1a0e4fbce5d9c1bc179a35a2fd9ed142664299e3
LinuxLinux	Affected =3.17	Fixed in–

Description

In the Linux kernel, the following vulnerability has been resolved: serial: core: do fallible allocations before the console can be registered serial_core_add_one_port() allocates uport->tty_groups after uart_configure_port(), which may register the console. If the allocation fails, the driver unwinds the port while its console remains registered. The earlier uport->name allocation has a related failure path that leaves state->uart_port linked to a port being freed. Failslab reproduced a NULL dereference in PL011 console output and a KASAN use-after-free in i.MX console output after failed binds. Allocate the name and tty_groups before linking the port and configuring it. Reserve space for the optional driver attribute group because config_port() may populate uport->attr_group during configuration.

References

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