CVE-2026-68214
CVE CVE-2026-68214EUVD EUVD-2026-55315Published 2026-08-10T12:00:33.000Z
What the advisory describes
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.
Source: EUVD (ENISA), in the words of the advisory.
Products the advisory names
These come from the advisory itself, not from any check we performed.
- Linux — Linux patch: 6.12.101; cddcc40b1b1553010acb89add84c64b5d123ec94 <90d781711418881f8c836c2a859cc2886625d750; patch: 6.6.148; cddcc40b1b1553010acb89add84c64b5d123ec94 <2c71bda6edc630a1f8c3c45d8df5fc22d234e042; 4.7; patch: 7.2-rc1; patch: 0; cddcc40b1b1553010acb89add84c64b5d123ec94 <680daf40a82d483949f87f0d8f98639dc47e610c; cddcc40b1b1553010acb89add84c64b5d123ec94 <24bef237eef8dd1ebcffb129ba21891ddad0d309; patch: 6.18.42; cddcc40b1b1553010acb89add84c64b5d123ec94 <9acd5bbbe1df8e487e49488692c224496d4c9e16; patch: 7.1.6
The versions shown are the advisory's own. Patchlage compares no version numbers and derives no judgement from them — which version is installed is something a person has to look up.
Carried in the product catalogue
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- Linux — Linux
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