VulnerabilityPublished 16 Sep 2026Updated 30 Oct 2026

CVE-2026-90029: Linux kernel · usb: storage: realtek_cr: fix use-after-free on disconnect

Source GCVE Database

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Authoritative record:CVE-2026-90029· Medium

Not known to be exploited · fixed in f98c2f119fcd81cfede114d2fd3463a17aed8209 : update Linux kernel when convenient.

Data as of 30 Oct 2026, 19:18 UTC

Severity

Medium

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

Thin evidence

One scorer or none

Patch: Available – fixed in f98c2f119fcd81cfede114d2fd3463a17aed8209, cae9dbba6adae21a04a3bd045e07b489847ff2c6, c1e7e35100efffba7c9e1dfa76519d6cd323ba3d +4

Exploitation evidence

Disclosed: evidence found.
CVE published 16 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-m7jg-4wjg-p9fx

What to do

Upgrade to a fixed release listed under Affected software.

Affected software

Product	Affected	Fixed in
LinuxLinux	Affected ≥ e931830bb877e2aad9a1be83506f9bdb26c91e4e, < f98c2f119fcd81cfede114d2fd3463a17aed8209	Fixed in f98c2f119fcd81cfede114d2fd3463a17aed8209
LinuxLinux	Affected ≥ e931830bb877e2aad9a1be83506f9bdb26c91e4e, < cae9dbba6adae21a04a3bd045e07b489847ff2c6	Fixed in cae9dbba6adae21a04a3bd045e07b489847ff2c6
LinuxLinux	Affected ≥ e931830bb877e2aad9a1be83506f9bdb26c91e4e, < c1e7e35100efffba7c9e1dfa76519d6cd323ba3d	Fixed in c1e7e35100efffba7c9e1dfa76519d6cd323ba3d
LinuxLinux	Affected ≥ e931830bb877e2aad9a1be83506f9bdb26c91e4e, < 0935e57ede003bbe35de9c5d6a49260999ca0314	Fixed in 0935e57ede003bbe35de9c5d6a49260999ca0314
LinuxLinux	Affected ≥ e931830bb877e2aad9a1be83506f9bdb26c91e4e, < 524d4257f741cd95eb85e2817c9c890928fcfef7	Fixed in 524d4257f741cd95eb85e2817c9c890928fcfef7
LinuxLinux	Affected ≥ e931830bb877e2aad9a1be83506f9bdb26c91e4e, < 7c4e2f964c65dea4ea22386799d5fb10ef1e3e54	Fixed in 7c4e2f964c65dea4ea22386799d5fb10ef1e3e54

AI-suggested

A fix has been implemented in the Linux kernel source code to address this vulnerability. Users should update their Linux kernel to a version that includes this patch. Since this is a kernel-level issue, applying the official kernel update is the recommended remediation.

Description

A use-after-free vulnerability in the Linux kernel's usb storage driver for Realtek chips (realtek_cr) has been fixed. The issue occurs because the timer callback may still run and rearm itself after the chip is freed on disconnect, leading to use-after-free. The fix involves using timer_shutdown_sync() to wait for the callback to finish and prevent rearming, and initializing the timer earlier to avoid failure paths invoking the destructor prematurely. This vulnerability was found by static analysis and has been resolved.

References

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