CyberSecBulletin
CVE-2026-64362NVD status: Analyzed

Linux: Use After Free

Published Updated By the CyberSecBulletin desk

CVE-2026-64362 is a high-severity use after free vulnerability in Linux, with a CVSS 3.1 base score of 7.8 out of 10. It can be exploited with local access to the system by an attacker with a low-privileged account, without any action from a user. The record lists versions 3b9a3919aac6977262f04d5365c0456877522a44, 4aef9676c26dff8723b56834951cfc6b618f0986, acce9dee807f21184fff19ad17c8ed464247e7f7 as the first without the flaw, so updating Linux to one of those releases or later removes the exposure. There is no confirmed exploitation so far. EPSS estimates a 0.13% chance of exploitation within 30 days, which is low compared with other CVEs.

Next patch cycle

High severity with no evidence of exploitation so far.

What to do

  1. Update Linux to 3b9a3919aac6977262f04d5365c0456877522a44 or 4aef9676c26dff8723b56834951cfc6b618f0986 or acce9dee807f21184fff19ad17c8ed464247e7f7 or 33cd1a000daf929356aacf2b191d31714ff0615e, whichever matches your release line, or a later version.
  2. Update Linux Kernel to 5.10.261 or 5.15.212 or 6.1.178 or 6.6.145, whichever matches your release line, or a later version.

Affected products and versions

VendorProductAffected versionsFixed in
LinuxLinux97b741aba918c4143f4208d2421d08ff215c1b49 up to, but not including, 3b9a3919aac6977262f04d5365c0456877522a44; 97b741aba918c4143f4208d2421d08ff215c1b49 up to, but not including, 4aef9676c26dff8723b56834951cfc6b618f0986; 97b741aba918c4143f4208d2421d08ff215c1b49 up to, but not including, acce9dee807f21184fff19ad17c8ed464247e7f7; 97b741aba918c4143f4208d2421d08ff215c1b49 up to, but not including, 33cd1a000daf929356aacf2b191d31714ff0615e; 97b741aba918c4143f4208d2421d08ff215c1b49 up to, but not including, dfc6e61f83113cc18346b6988f07271c0063357d; 97b741aba918c4143f4208d2421d08ff215c1b49 up to, but not including, 4d0d51bc12d246accbfbb94de05d729c68c9b8fb; 97b741aba918c4143f4208d2421d08ff215c1b49 up to, but not including, 8131f4226688c4be5f30874d167e44dab838eb09; 97b741aba918c4143f4208d2421d08ff215c1b49 up to, but not including, 7705b4140d188ce22656f6e541ae7ef834c7e11a; and 1 more ranges3b9a3919aac6977262f04d5365c0456877522a44, 4aef9676c26dff8723b56834951cfc6b618f0986, acce9dee807f21184fff19ad17c8ed464247e7f7, 33cd1a000daf929356aacf2b191d31714ff0615e, dfc6e61f83113cc18346b6988f07271c0063357d, 4d0d51bc12d246accbfbb94de05d729c68c9b8fb
LinuxLinux Kernel5.5 up to, but not including, 5.10.261; 5.11 up to, but not including, 5.15.212; 5.16 up to, but not including, 6.1.178; 6.2 up to, but not including, 6.6.145; 6.7 up to, but not including, 6.12.96; 6.13 up to, but not including, 6.18.39; 6.19 up to, but not including, 7.1.4; 7.25.10.261, 5.15.212, 6.1.178, 6.6.145, 6.12.96, 6.18.39

Version data comes from the organisation that assigned the CVE. Confirm against the vendor advisory before deciding you are unaffected.

How the severity score breaks down

Attack vector
LocalThe attacker needs local access or must trick a user into running something.
Attack complexity
LowNo special conditions are needed; the attack works reliably.
Privileges required
LowA basic user account is enough.
User interaction
NoneNo action by a victim is required.
Scope
UnchangedImpact stays within the vulnerable component.
Confidentiality
HighAll data handled by the component can be read.
Integrity
HighData or code can be modified at will.
Availability
HighThe component can be taken down completely.

Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H. Scored by NVD.

Official description

In the Linux kernel, the following vulnerability has been resolved: HID: lg-g15: cancel pending work on remove to fix a use-after-free lg_g15_data is allocated with devm and holds a work item. The report handlers schedule that work straight from device input. lg_g15_event() and lg_g15_v2_event() do it on the backlight cycle key, and lg_g510_leds_event() does it too. The worker dereferences the lg_g15_data back through container_of. The driver had no remove callback and never cancelled the work. So if a report scheduled the work and the keyboard was then unplugged, devres freed lg_g15_data while the work was still pending or running, and the worker touched freed memory. This is a use-after-free. It is reachable as a race on device unplug. Add a remove callback that cancels the work before devres frees the state. g15->work is only initialized for the models that schedule it (G15, G15 v2, G510). The G13 and Z-10 leave it zeroed, so guard the cancel on g15->work.func to avoid cancelling a work that was never set up. The g15 NULL test mirrors the one already in lg_g15_raw_event().

Source: the CVE record as published by its numbering authority, via NVD and CVE.org.

The underlying weakness: Use After Free

The product reuses or references memory after it has been freed. At some point afterward, the memory may be allocated again and saved in another pointer, while the original pointer references a location somewhere within the new allocation. Any operations using the original pointer are no longer valid because the memory belongs to the code that operates on the new pointer.

How developers prevent this class of flaw

  • Choose a language that provides automatic memory management.
  • When freeing pointers, be sure to set them to NULL once they are freed. However, the utilization of multiple or complex data structures may lower the usefulness of this strategy.

More Use After Free vulnerabilities (CWE-416)

Timeline

  1. CVE record published.
  2. CISA published its SSVC assessment (exploitation: none, automatable: no, technical impact: partial).
  3. Record last changed materially (score, affected products, status or references).

References

Recent Use After Free vulnerabilities

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