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CVE-2026-89900— media: cec: core: Fix kmemleak due to missed rc_free_device() call

Quick assessment

Affected
Linux Linux
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

在 Linux 内核中，以下漏洞已得到修复： 标题：media: cec: core: 修复因遗漏 调用导致的内核内存泄漏（kmemleak） 详细描述： 提交 （“media: rc: 修复 unregister 与 urb/irq 回调之间的竞争条件”）移除了 中对 的隐式调用。然而，该提交遗漏了移除 的 NULL 赋值，这导致已分配的 rc 设备上的 永远不会被调用。 例如，在 dw-hdmi 解绑后，kmemleak 工具报告了如下未引用对象： 修复方案： 移除将 赋值为 NULL 的语句，以便在最后一个

AI Predicted 5.5 Difficulty: Theoretical EPSS 0.20% · P9

Affected Version Matrix 15

VendorProduct Version RangeStatus
Linux Linux 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 more rows
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I. Basic Information for CVE-2026-89900

Vulnerability Information
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Vulnerability Title
media: cec: core: Fix kmemleak due to missed rc_free_device() call
Source: CVE Program / CVE List V5
Vulnerability 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.
Source: CVE Program / CVE List V5
CVSS Information
N/A
Source: CVE Program / CVE List V5
Vulnerability Type
N/A
Source: CVE Program / CVE List V5

Affected Products

Vendor Product Affected Versions CPE Subscribe
Linux Linux a7becb58f6b8a3a3efe5d3acfd52e2c107de6772 ~ 954ee95a03b4d31d4505591bfaba02c24b75776b -
Linux Linux 7.1 -

II. Public POCs for CVE-2026-89900

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III. Intelligence Information for CVE-2026-89900

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Other References for CVE-2026-89900 (5)

Same Patch Batch · Linux · 2026-09-16 · 276 CVEs total

CVE-2026-90048 9.8 CRITICAL fs/ntfs3: fix slab-out-of-bounds write in ni_create_attr_list()
CVE-2026-90012 9.8 CRITICAL spi: Fix DMA mapping ownership on partial map failure
CVE-2026-89970 9.8 CRITICAL nvmet-auth: Synchronize timeout work during SQ teardown
CVE-2026-89857 9.8 CRITICAL scsi: qla2xxx: Hold qpair lock when sending NVMe LS reject
CVE-2026-89969 9.8 CRITICAL nvmet-tcp: fix out-of-bounds write when receiving an over-long PDU
CVE-2026-89847 9.8 CRITICAL scsi: qla2xxx: Avoid double completion in async IOCB timeout
CVE-2026-89972 9.8 CRITICAL nvme: add missing SRCU grace period in error path
CVE-2026-89990 9.8 CRITICAL ceph: lock mutex in ceph_mds_check_access()
CVE-2026-90036 9.8 CRITICAL NFSD: Prevent client use-after-free during blocked-lock reaping
CVE-2026-90038 9.8 CRITICAL NFSD: Prevent client use-after-free during export state revocation
CVE-2026-90037 9.8 CRITICAL NFSD: Prevent client use-after-free during close_lru reaping
CVE-2026-89788 9.8 CRITICAL ksmbd: fix tree connection use-after-free in smb2_tree_connect()
CVE-2026-89783 9.8 CRITICAL xfrm6: fix out-of-bounds write in xfrm6_input_addr() when secpath is full
CVE-2026-90042 9.8 CRITICAL ceph: properly decrypt filenames in vmalloc() buffers
CVE-2026-89778 9.8 CRITICAL isofs: fix out-of-bounds page array access on empty zisofs block
CVE-2026-89915 9.3 CRITICAL KVM: arm64: Remove VM-wide VNCR mapping counter
CVE-2026-90049 9.3 CRITICAL net: skbuff: don't skb_tx_error() the source skb in skb_zerocopy()
CVE-2026-89775 9.3 CRITICAL KVM: arm64: Handle negative S1 walk levels in VNCR TLB size evaluation
CVE-2026-89916 9.3 CRITICAL KVM: arm64: Make VNCR invalidation participate in MMU invalidation retry
CVE-2026-89930 9.3 CRITICAL KVM: nVMX: Service local TLB flushes on failed nested VM-Enter

Showing top 20 of 276 CVEs. View all on vendor page &rarr; →

IV. Related Vulnerabilities

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