CVE-2026-68214: Linux kernel · media: rtl2832: fix use-after-free in rtl2832_remove()
Affects Linux kernelSource CVE Database V5
Not known to be exploited · fixed in 680daf40a82d483949f87f0d8f98639dc47e610c : update Linux kernel when convenient.
Data as of 6 Nov 2026, 17:04 UTC
Rated by Threat Radar · No CVSS score from NVD or the CNA
Thin evidence
One scorer or none- CISA SSVC
- Exploitation
- No evidence of active exploitation and no public proof of concept
- Automatable
- Attackers cannot reliably automate steps 1–4 of the kill chain
- Technical impact
- Limited control over the software or limited information exposure
CISA SSVC assessment, 2026-11-06.
- Patch
- Available – fixed in 680daf40a82d483949f87f0d8f98639dc47e610c, 90d781711418881f8c836c2a859cc2886625d750, 68a9c0290897c1436ddceb8cea604c93377a0299 +5
Exploitation evidence
Disclosed: evidence found.
CVE published 10 Aug 2026
Detectable: no evidence on record.
No public nuclei template indexed
Weaponized: 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 6 Nov 2026.
What to do
Upgrade to a fixed release listed under Affected software.
Affected software
| Product | Affected | Fixed in |
|---|---|---|
| LinuxLinux | Affected
| Fixed in
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| LinuxLinux | Affected
| Fixed in
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| LinuxLinux | Affected
| Fixed in
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| LinuxLinux | Affected
| Fixed in
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| LinuxLinux | Affected
| Fixed in
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| LinuxLinux | Affected
| Fixed in
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Description
In the Linux kernel, the following vulnerability has been resolved: media: rtl2832: fix use-after-free in rtl2832_remove() cancel_delayed_work_sync() is called before i2c_mux_del_adapters() in rtl2832_remove(). While the cancel waits for any running instance of i2c_gate_work to finish, it does not prevent the timer from being rescheduled by a concurrent thread. During probe, the r820t_attach() call attempts I2C transfers through the mux adapter. These transfers go through i2c_mux_master_xfer(), which calls rtl2832_deselect() after the transfer completes, rescheduling i2c_gate_work via schedule_delayed_work(). If this transfer is still in flight when rtl2832_remove() runs, rtl2832_deselect() can reschedule i2c_gate_work after it has been cancelled, causing a use-after-free when kfree(dev) is called. Fix this by calling i2c_mux_del_adapters() before cancel_delayed_work_sync(). Once the mux adapter is unregistered, no new I2C transfers can go through it, so rtl2832_deselect() can no longer reschedule i2c_gate_work. The subsequent cancel_delayed_work_sync() is then guaranteed to be final.
References
- git.kernel.org/stable/c/1e8a6bc19403661661fed5ae82f6eca6c9cdfad2 (opens in a new tab)
- git.kernel.org/stable/c/68a9c0290897c1436ddceb8cea604c93377a0299 (opens in a new tab)
- git.kernel.org/stable/c/13c06056699e66ff7109ba68658cc6ea4a23f516 (opens in a new tab)
- git.kernel.org/stable/c/9acd5bbbe1df8e487e49488692c224496d4c9e16 (opens in a new tab)
- git.kernel.org/stable/c/24bef237eef8dd1ebcffb129ba21891ddad0d309 (opens in a new tab)
- git.kernel.org/stable/c/2c71bda6edc630a1f8c3c45d8df5fc22d234e042 (opens in a new tab)
- git.kernel.org/stable/c/90d781711418881f8c836c2a859cc2886625d750 (opens in a new tab)
- git.kernel.org/stable/c/680daf40a82d483949f87f0d8f98639dc47e610c (opens in a new tab)