CVE-2026-68152amt: fix use-after-free in AMT delayed works
- 7.8HighCVSS base score
- 0.13%Exploitation in 30 daysEPSS · top 97% of all CVEs
- NoKnown exploitednot in CISA's KEV catalog
- NonePublic exploitsnone known yet
Description
In the Linux kernel, the following vulnerability has been resolved: amt: fix use-after-free in AMT delayed works When an AMT device is removed, pending delayed works can still access the freed amt_dev structure, which may result in kernel crashes or memory corruption. amt_dev_stop() cancels req_wq and discovery_wq with cancel_delayed_work_sync(), but these works can be scheduled again from event_wq after the cancellation. This allows delayed works to access the freed amt_dev structure after the netdev has been released. The following is a simple race scenario: CPU0 CPU1 amt_dev_stop() cancel_delayed_work_sync() amt_event_work() mod_delayed_work(req_wq) free netdev req_wq accesses freed amt_dev Use disable_delayed_work_sync() in amt_dev_stop() to prevent req_wq and discovery_wq from being queued again and wait for running work items to complete. The delayed works are disabled after initialization in amt_newlink() and enabled only when the device is successfully opened. This keeps the delayed work lifecycle synchronized with the lifetime of the AMT device.
Timeline
ID reserved
By Linux
- 11 days later
· 11 days later
Published
- 7 days later
· 7 days later
Record updated
Changes after publication (a new score, a public exploit, EPSS crossing 1, 10 or 50 %, leaving KEV) are kept since November 2026; earlier ones are not known.
Scores
| Scored by | CVSS | Score | Vector |
|---|---|---|---|
| LinuxCNA (assigner) | 3.1 | High7.8 | CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H |
| NVDNVD · Received | 3.1 | High7.8 | CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H |
- EPSS (exploitation in 30 days)
- 0.13% · top 97% of all CVEs (13 Nov 2026)
The list uses the assigner's score when there is one, then CISA's, then NVD's: High 7.8.
Affected products
- affected cbc21dc1cfe949e37b2a54c71511579f1899e8d4 – < a46bfa01e01df0f6f6dc4b0be18db002d6d2dbd2
- affected cbc21dc1cfe949e37b2a54c71511579f1899e8d4 – < 1a644db2cf59f164cdf3c75995bab5aadc097528
- affected cbc21dc1cfe949e37b2a54c71511579f1899e8d4 – < 006340cf06881b6ff49767d8b6f3c4f7b892670c
- affected cbc21dc1cfe949e37b2a54c71511579f1899e8d4 – < ea20c44935d6142daecfa9b39d635033a7553e1b
- affected 5.16
- unaffected < 5.16
- unaffected 6.12.101 – ≤ 6.12.*
- unaffected 6.18.42 – ≤ 6.18.*
- unaffected 7.1.6 – ≤ 7.1.*
- unaffected 7.2 – ≤ *
References
References4
- https://git.kernel.org/stable/c/a46bfa01e01df0f6f6dc4b0be18db002d6d2dbd2 (opens in a new tab)
- https://git.kernel.org/stable/c/1a644db2cf59f164cdf3c75995bab5aadc097528 (opens in a new tab)
- https://git.kernel.org/stable/c/006340cf06881b6ff49767d8b6f3c4f7b892670c (opens in a new tab)
- https://git.kernel.org/stable/c/ea20c44935d6142daecfa9b39d635033a7553e1b (opens in a new tab)
Sources
The same CVE in the primary databases and aggregators, to check against.
- CVE.org record (opens in a new tab)
- CVE List JSON (GitHub) (opens in a new tab)
- NVD (opens in a new tab)
- FIRST EPSS (opens in a new tab)
- EUVD EUVD-2026-55538 (opens in a new tab)
- OSV.dev (opens in a new tab)
- GitHub Advisories (opens in a new tab)
- CIRCL Vulnerability-Lookup (opens in a new tab)
Badge for a README or a ticket
[](https://cveledger.app/cve/CVE-2026-68152)Record last updated .