VulnerabilityPublished 16 Sep 2026Updated 21 Oct 2026

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

Affects Linux kernelSource CVE Database V5

Not known to be exploited · fixed in cae9dbba6adae21a04a3bd045e07b489847ff2c6 : update Linux kernel when convenient.

Data as of 26 Oct 2026, 17:16 UTC

Severity

Unrated

Rated by Threat Radar · CVSS not yet scored by NVD

EPSS: 0.1% chance of exploitation in 30 days – higher than 8% of CVEsExploit Prediction Scoring System: the likelihood attackers will use this flaw soon.
Patch: Available – fixed in cae9dbba6adae21a04a3bd045e07b489847ff2c6, c1e7e35100efffba7c9e1dfa76519d6cd323ba3d, 524d4257f741cd95eb85e2817c9c890928fcfef7 +2

Exploitation evidence

Disclosed: evidence found.
CVE published 16 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 ≥ e931830bb877e2aad9a1be83506f9bdb26c91e4e, < cae9dbba6adae21a04a3bd045e07b489847ff2c6	Fixed in cae9dbba6adae21a04a3bd045e07b489847ff2c6
LinuxLinux	Affected ≥ e931830bb877e2aad9a1be83506f9bdb26c91e4e, < c1e7e35100efffba7c9e1dfa76519d6cd323ba3d	Fixed in c1e7e35100efffba7c9e1dfa76519d6cd323ba3d
LinuxLinux	Affected ≥ e931830bb877e2aad9a1be83506f9bdb26c91e4e, < 524d4257f741cd95eb85e2817c9c890928fcfef7	Fixed in 524d4257f741cd95eb85e2817c9c890928fcfef7
LinuxLinux	Affected ≥ e931830bb877e2aad9a1be83506f9bdb26c91e4e, < 7c4e2f964c65dea4ea22386799d5fb10ef1e3e54	Fixed in 7c4e2f964c65dea4ea22386799d5fb10ef1e3e54
LinuxLinux	Affected ≥ e931830bb877e2aad9a1be83506f9bdb26c91e4e, < 4ffee1aebb0c0ffcda9faffd17834ea9b00d42cc	Fixed in 4ffee1aebb0c0ffcda9faffd17834ea9b00d42cc
LinuxLinux	Affected =3.1	Fixed in–

Description

In the Linux kernel, the following vulnerability has been resolved: usb: storage: realtek_cr: fix use-after-free on disconnect realtek_cr_destructor() calls timer_delete() before the chip containing the timer is freed. The timer callback may still be running and can rearm itself, resulting in a use-after-free. Use timer_shutdown_sync() to wait for the callback and prevent further rearming. Do this unconditionally because ss_en may be changed after the timer is armed. Move timer_setup() into init_realtek_cr() so the timer is initialized before any failure path can invoke the destructor. Found by static analysis.

References

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