VulnerabilityPublished 17 Sep 2026Updated 19 Oct 2026

CVE-2026-93050: Linux kernel · ipack: ipoctal: fix UAF, null-ptr-deref, and use-after-free in cleanup on remove

Affects Linux kernelSource CVE Database V5

Not known to be exploited · fixed in c92ef8fd834521f0b788e0511976c689fe57c63c : patch Linux kernel soon.

Data as of 26 Oct 2026, 15:59 UTC

Severity

High

Rated High by Threat Radar's AI analysis · 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 c92ef8fd834521f0b788e0511976c689fe57c63c, b6b5d64cb161a28347d64dc3168a636c4abb68d5, ab5f5b27a340004b92252c6a5f23bf1c6cf3b02a +3

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 ≥ 05e5027efc9c0bb6d1d04cde279afbafca0a7929, < c92ef8fd834521f0b788e0511976c689fe57c63c	Fixed in c92ef8fd834521f0b788e0511976c689fe57c63c
LinuxLinux	Affected ≥ 05e5027efc9c0bb6d1d04cde279afbafca0a7929, < b6b5d64cb161a28347d64dc3168a636c4abb68d5	Fixed in b6b5d64cb161a28347d64dc3168a636c4abb68d5
LinuxLinux	Affected ≥ 05e5027efc9c0bb6d1d04cde279afbafca0a7929, < ab5f5b27a340004b92252c6a5f23bf1c6cf3b02a	Fixed in ab5f5b27a340004b92252c6a5f23bf1c6cf3b02a
LinuxLinux	Affected ≥ 05e5027efc9c0bb6d1d04cde279afbafca0a7929, < a4613140f01bd0fb9980e2746ed9aaa65a29b5d6	Fixed in a4613140f01bd0fb9980e2746ed9aaa65a29b5d6
LinuxLinux	Affected ≥ 05e5027efc9c0bb6d1d04cde279afbafca0a7929, < 4a6518be316029650301f2a5e8f0def229b895d9	Fixed in 4a6518be316029650301f2a5e8f0def229b895d9
LinuxLinux	Affected ≥ 05e5027efc9c0bb6d1d04cde279afbafca0a7929, < 1a3258e105f711538201bdd2ac2a05b11554eabc	Fixed in 1a3258e105f711538201bdd2ac2a05b11554eabc

AI-suggested

A fix is available and has been applied in the Linux kernel as indicated by the listed fixed commit hashes. Users should update their Linux kernel to a version including these fixes to remediate the vulnerability. No additional mitigation steps are indicated.

Description

CVE-2026-93050 is a vulnerability in the Linux kernel's ipack ipoctal driver that involves use-after-free (UAF) and null pointer dereference issues during device removal while a tty session is active. The flaw arises because the driver frees resources while they may still be accessed by ongoing tty operations, leading to potential memory corruption and system instability. The vulnerability has been fixed by introducing reference counting, null checks, and a removed flag to prevent access to freed resources.

Impact

The vulnerability can lead to use-after-free and null pointer dereference conditions in the Linux kernel, potentially causing kernel crashes, system instability, or denial of service when a device is removed while a tty session is active. There is no indication of remote code execution or privilege escalation from the provided data. No known exploits in the wild have been reported.

Summary

This vulnerability affects the Linux kernel ipack ipoctal driver and involves three main issues triggered when the device is removed while a tty session remains active: (1) a use-after-free of the ipoctal structure due to premature freeing in the remove callback, mitigated by adding kref-based lifetime management; (2) a null pointer dereference in ipoctal_write_tty caused by freeing the transmit buffer while a userspace process may still write to the tty, fixed by adding null checks; (3) a use-after-free in ipoctal_cleanup due to dereferencing a freed device pointer, resolved by caching the carrier owner pointer and avoiding access to the freed device. Additionally, a removed flag was introduced to prevent hardware resource access after removal, avoiding page faults. The fix is implemented in specific Linux kernel commits identified by their hashes.

References

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Exploitation evidence

What to do

Affected software

Description

AI analysisMachine-generated, updated 26 Oct 2026, 15:02 UTC

Technical details

References

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