CVE-2026-89900media: cec: core: Fix kmemleak due to missed rc_free_device() call
Updated under an hour ago ()
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In the Linux kernel, the following vulnerability has been resolved: media: cec: core: Fix kmemleak due to missed rc_free_device() call The commit dccc0c3ddf8f ("media: rc: fix race between unregister and urb/irq callbacks") removed the implicit call to rc_free_device() from rc_unregister_device(). However, the commit missed to remove the NULL assignment of adap->rc that is now causing rc_free_device() to never be called on an allocated rc device. kmemleak reports following after e.g. dw-hdmi unbind: unreferenced object 0xffff00010ac10000 (size 4096): comm "kworker/u16:1", pid 39, jiffies 4294897739 hex dump (first 32 bytes): 20 23 4b 0a 01 00 ff ff 08 00 c1 0a 01 00 ff ff #K............. 08 00 c1 0a 01 00 ff ff 00 00 00 00 00 00 00 00 ................ backtrace (crc e11baccc): kmemleak_alloc+0x38/0x44 __kmalloc_cache_noprof+0x4a8/0x5e0 rc_allocate_device+0x48/0x2a0 cec_allocate_adapter+0x3ac/0x800 dw_hdmi_cec_probe+0x264/0x634 platform_probe+0xc0/0x188 really_probe+0x4a4/0x8e0 __driver_probe_device+0x2f8/0x440 driver_probe_device+0x60/0x160 __device_attach_driver+0x1a0/0x2a0 bus_for_each_drv+0x100/0x1a0 __device_attach+0x174/0x350 device_initial_probe+0x90/0xb0 bus_probe_device+0x4c/0x120 device_add+0xdec/0x116c platform_device_add+0x354/0x598 Remove the assignment of adap->rc to NULL to let cec_delete_adapter() free the allocated rc device after last user of the cec device exits to fix the kmemleak.
- CVSS
- Not yet scored
- Weakness (CWE)
- Not given
- Known exploited
- Not in CISA's KEV catalog
- EPSS (exploitation in the next 30 days)
- Not loaded for this CVE
- Assigned by
- Linux
- NVD analysis
- Received
- Record last updated
- Sep 16, 2026
- First seen by InfoSec Signals
- Oct 9, 2026
Affected products
Linux Linux linux:linux (from the name) | from a7becb58f6b8a3a3efe5d3acfd52e2c107de6772 before 954ee95a03b4d31d4505591bfaba02c24b75776b; from 75977f5f5c4974c72bbedefbf09ad33ebbaa36f1 before f28a8e1ba4d67a18e4662e5acefd5a4389322366; from e250b672d40a9e0d97a8895cbb301248bea0fce6 before 695063fc57574dd117b1bc750ca189cf03a2caad; from dccc0c3ddf8f16071736f98a7d6dd46a2d43e037 before cca2407794795cecff7f8e5f5a79f4ef6b1d6f6c; from dccc0c3ddf8f16071736f98a7d6dd46a2d43e037 before a24ba0653f7154e671dc8d2bf64682ab2d042792; from 6.6.143 before 6.6.157; from 6.12.93 before 6.12.110; from 6.18.35 before 6.18.51 | CNA record |
References
- https://git.kernel.org/stable/c/954ee95a03b4d31d4505591bfaba02c24b75776b
- https://git.kernel.org/stable/c/f28a8e1ba4d67a18e4662e5acefd5a4389322366
- https://git.kernel.org/stable/c/695063fc57574dd117b1bc750ca189cf03a2caad
- https://git.kernel.org/stable/c/cca2407794795cecff7f8e5f5a79f4ef6b1d6f6c
- https://git.kernel.org/stable/c/a24ba0653f7154e671dc8d2bf64682ab2d042792
The CVE record on cve.org NVD's entry
The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.