CVE-2026-89900media: cec: core: Fix kmemleak due to missed rc_free_device() call
- —Not scoredno CVSS score yet
- 0.20%Exploitation in 30 daysEPSS · top 90% 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: 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.
Timeline
ID reserved
By Linux
- 5 days later
· 5 days later
Published
- 33 days later
· 33 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
No CVSS score yet: neither the CNA, CISA nor NVD has scored this CVE. NVD status: Received.
- EPSS (exploitation in 30 days)
- 0.20% · top 90% of all CVEs (12 Nov 2026)
The list uses the assigner's score when there is one, then CISA's, then NVD's: Not scored.
Affected products
- affected a7becb58f6b8a3a3efe5d3acfd52e2c107de6772 – < 954ee95a03b4d31d4505591bfaba02c24b75776b
- affected 75977f5f5c4974c72bbedefbf09ad33ebbaa36f1 – < f28a8e1ba4d67a18e4662e5acefd5a4389322366
- affected e250b672d40a9e0d97a8895cbb301248bea0fce6 – < 695063fc57574dd117b1bc750ca189cf03a2caad
- affected dccc0c3ddf8f16071736f98a7d6dd46a2d43e037 – < cca2407794795cecff7f8e5f5a79f4ef6b1d6f6c
- affected dccc0c3ddf8f16071736f98a7d6dd46a2d43e037 – < a24ba0653f7154e671dc8d2bf64682ab2d042792
- affected 6.6.143 – < 6.6.157
- affected 6.12.93 – < 6.12.110
- affected 6.18.35 – < 6.18.51
- affected 7.1
- unaffected < 7.1
- unaffected 6.6.157 – ≤ 6.6.*
- unaffected 6.12.110 – ≤ 6.12.*
- unaffected 6.18.51 – ≤ 6.18.*
- unaffected 7.2.5 – ≤ 7.2.*
- unaffected 7.3 – ≤ *
References
References5
- https://git.kernel.org/stable/c/954ee95a03b4d31d4505591bfaba02c24b75776b (opens in a new tab)
- https://git.kernel.org/stable/c/f28a8e1ba4d67a18e4662e5acefd5a4389322366 (opens in a new tab)
- https://git.kernel.org/stable/c/695063fc57574dd117b1bc750ca189cf03a2caad (opens in a new tab)
- https://git.kernel.org/stable/c/cca2407794795cecff7f8e5f5a79f4ef6b1d6f6c (opens in a new tab)
- https://git.kernel.org/stable/c/a24ba0653f7154e671dc8d2bf64682ab2d042792 (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-2026-80500 (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)
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[](https://cveledger.app/cve/CVE-2026-89900)Record last updated .