VulnerabilityPublished 18 Oct 2026Updated 21 Oct 2026

CVE-2026-98859: Linux kernel · HID: multitouch: stop the release timer from being rearmed on remove

Source GCVE Database

Authoritative record:CVE-2026-98859

Not known to be exploited · fixed in a0125ca86e405b8a704e96157a6c10ca51087652 : update Linux kernel when convenient.

Data as of 26 Oct 2026, 13:47 UTC

Severity

Medium

Rated by Threat Radar · CVSS not yet scored by NVD

EPSS: 0.1% chance of exploitation in 30 days – higher than 4% of CVEsExploit Prediction Scoring System: the likelihood attackers will use this flaw soon.
Patch: Available – fixed in a0125ca86e405b8a704e96157a6c10ca51087652, 3776f34fbce990af45978f1628d2e1adc0d67d0f, 5acb2dace582f061aab5e14c399ac9480315f44b +2

Exploitation evidence

Disclosed: evidence found.
CVE published 18 Oct 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.

ghsa-rf84-p87x-87h6

What to do

Upgrade to a fixed release listed under Affected software.

Affected software

Product	Affected	Fixed in
LinuxLinux	Affected ≥ 4f4001bc76fd1a138a501fbd3d68cce72cbf96ce, < a0125ca86e405b8a704e96157a6c10ca51087652	Fixed in a0125ca86e405b8a704e96157a6c10ca51087652
LinuxLinux	Affected ≥ 4f4001bc76fd1a138a501fbd3d68cce72cbf96ce, < 3776f34fbce990af45978f1628d2e1adc0d67d0f	Fixed in 3776f34fbce990af45978f1628d2e1adc0d67d0f
LinuxLinux	Affected ≥ 4f4001bc76fd1a138a501fbd3d68cce72cbf96ce, < 5acb2dace582f061aab5e14c399ac9480315f44b	Fixed in 5acb2dace582f061aab5e14c399ac9480315f44b
LinuxLinux	Affected ≥ 4f4001bc76fd1a138a501fbd3d68cce72cbf96ce, < 1f1bd9a3117f082eb891c0986c4f0e04cd974c9a	Fixed in 1f1bd9a3117f082eb891c0986c4f0e04cd974c9a
LinuxLinux	Affected ≥ 4f4001bc76fd1a138a501fbd3d68cce72cbf96ce, < 0c19a6c1d25fd5ed66d1f80dc6f6e56cc1f0a787	Fixed in 0c19a6c1d25fd5ed66d1f80dc6f6e56cc1f0a787
LinuxLinux	Affected =4.13	Fixed in–

AI-suggested

A fix is available that replaces timer_delete_sync() with timer_shutdown_sync() in the HID multitouch driver to properly quiesce the release timer and prevent it from being rearmed after teardown. Users should apply the updated Linux kernel version containing this fix once it is released. Patch status is not explicitly confirmed in the provided data; check the vendor advisory for current remediation guidance.

Description

A vulnerability in the Linux kernel's HID multitouch driver was resolved by changing the timer shutdown method to prevent use-after-free conditions. The issue involved the release timer being rearmed after it was deleted, leading to potential dereferencing of freed memory. The fix replaces timer_delete_sync() with timer_shutdown_sync() to ensure the timer cannot be rearmed after teardown.

References

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