CVE-2026-68214None▾ SunlitIn 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 f…
▾ Sunlit zone — Low / medium · no exploitation signal
impact 2.8 · likelihood 0 · exploitation 0
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Stakeholder-Specific Vulnerability Categorization from CISA's ADP record at CVE.org: whether exploitation is observed, whether an attack can be automated, and how much of the system is at stake.
Exploit-prediction probability, daily snapshots since Nov 6.
Disclosure to exploitation, from the record and what we observed since indexing it.
Disclosed via CVEORG
Last analysed / modified upstream
0.2%
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.
Linux >= cddcc40b1b1553010acb89add84c64b5d123ec94 < 1e8a6bc19403661661fed5ae82f6eca6c9cdfad2Linux >= cddcc40b1b1553010acb89add84c64b5d123ec94 < 68a9c0290897c1436ddceb8cea604c93377a0299Linux >= cddcc40b1b1553010acb89add84c64b5d123ec94 < 13c06056699e66ff7109ba68658cc6ea4a23f516Linux >= cddcc40b1b1553010acb89add84c64b5d123ec94 < 9acd5bbbe1df8e487e49488692c224496d4c9e16Linux >= cddcc40b1b1553010acb89add84c64b5d123ec94 < 24bef237eef8dd1ebcffb129ba21891ddad0d309Linux >= cddcc40b1b1553010acb89add84c64b5d123ec94 < 2c71bda6edc630a1f8c3c45d8df5fc22d234e042Linux >= cddcc40b1b1553010acb89add84c64b5d123ec94 < 90d781711418881f8c836c2a859cc2886625d750Linux >= cddcc40b1b1553010acb89add84c64b5d123ec94 < 680daf40a82d483949f87f0d8f98639dc47e610cLinux 4.7Refer to the linked advisories for vendor-supplied fixes and affected version ranges.
Connected by shared product, vendor, weakness, or advisory.
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