CVE-2026-89900
Full vulnerability record from the local CVENow database.
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.
View original CVE JSON
{
"id": "CVE-2026-89900",
"sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"published": "2026-09-16T11:16:58.880",
"lastModified": "2026-10-19T09:18:35.297",
"vulnStatus": "Received",
"cveTags": [],
"descriptions": [
{
"lang": "en",
"value": "In the Linux kernel, the following vulnerability has been resolved:\n\nmedia: cec: core: Fix kmemleak due to missed rc_free_device() call\n\nThe commit dccc0c3ddf8f (\"media: rc: fix race between unregister and\nurb/irq callbacks\") removed the implicit call to rc_free_device() from\nrc_unregister_device(). However, the commit missed to remove the NULL\nassignment of adap->rc that is now causing rc_free_device() to never be\ncalled on an allocated rc device.\n\nkmemleak reports following after e.g. dw-hdmi unbind:\n\nunreferenced object 0xffff00010ac10000 (size 4096):\n comm \"kworker/u16:1\", pid 39, jiffies 4294897739\n hex dump (first 32 bytes):\n 20 23 4b 0a 01 00 ff ff 08 00 c1 0a 01 00 ff ff #K.............\n 08 00 c1 0a 01 00 ff ff 00 00 00 00 00 00 00 00 ................\n backtrace (crc e11baccc):\n kmemleak_alloc+0x38/0x44\n __kmalloc_cache_noprof+0x4a8/0x5e0\n rc_allocate_device+0x48/0x2a0\n cec_allocate_adapter+0x3ac/0x800\n dw_hdmi_cec_probe+0x264/0x634\n platform_probe+0xc0/0x188\n really_probe+0x4a4/0x8e0\n __driver_probe_device+0x2f8/0x440\n driver_probe_device+0x60/0x160\n __device_attach_driver+0x1a0/0x2a0\n bus_for_each_drv+0x100/0x1a0\n __device_attach+0x174/0x350\n device_initial_probe+0x90/0xb0\n bus_probe_device+0x4c/0x120\n device_add+0xdec/0x116c\n platform_device_add+0x354/0x598\n\nRemove the assignment of adap->rc to NULL to let cec_delete_adapter()\nfree the allocated rc device after last user of the cec device exits to\nfix the kmemleak."
}
],
"affected": [
{
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"affectedData": [
{
"vendor": "Linux",
"product": "Linux",
"defaultStatus": "unaffected",
"programFiles": [
"drivers/media/cec/core/cec-core.c"
],
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"versions": [
{
"version": "a7becb58f6b8a3a3efe5d3acfd52e2c107de6772",
"lessThan": "954ee95a03b4d31d4505591bfaba02c24b75776b",
"versionType": "git",
"status": "affected"
},
{
"version": "75977f5f5c4974c72bbedefbf09ad33ebbaa36f1",
"lessThan": "f28a8e1ba4d67a18e4662e5acefd5a4389322366",
"versionType": "git",
"status": "affected"
},
{
"version": "e250b672d40a9e0d97a8895cbb301248bea0fce6",
"lessThan": "695063fc57574dd117b1bc750ca189cf03a2caad",
"versionType": "git",
"status": "affected"
},
{
"version": "dccc0c3ddf8f16071736f98a7d6dd46a2d43e037",
"lessThan": "cca2407794795cecff7f8e5f5a79f4ef6b1d6f6c",
"versionType": "git",
"status": "affected"
},
{
"version": "dccc0c3ddf8f16071736f98a7d6dd46a2d43e037",
"lessThan": "a24ba0653f7154e671dc8d2bf64682ab2d042792",
"versionType": "git",
"status": "affected"
},
{
"version": "6.6.143",
"lessThan": "6.6.157",
"versionType": "semver",
"status": "affected"
},
{
"version": "6.12.93",
"lessThan": "6.12.110",
"versionType": "semver",
"status": "affected"
},
{
"version": "6.18.35",
"lessThan": "6.18.51",
"versionType": "semver",
"status": "affected"
}
]
},
{
"vendor": "Linux",
"product": "Linux",
"defaultStatus": "affected",
"programFiles": [
"drivers/media/cec/core/cec-core.c"
],
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"versions": [
{
"version": "7.1",
"status": "affected"
},
{
"version": "0",
"lessThan": "7.1",
"versionType": "semver",
"status": "unaffected"
},
{
"version": "6.6.157",
"lessThanOrEqual": "6.6.*",
"versionType": "semver",
"status": "unaffected"
},
{
"version": "6.12.110",
"lessThanOrEqual": "6.12.*",
"versionType": "semver",
"status": "unaffected"
},
{
"version": "6.18.51",
"lessThanOrEqual": "6.18.*",
"versionType": "semver",
"status": "unaffected"
},
{
"version": "7.2.5",
"lessThanOrEqual": "7.2.*",
"versionType": "semver",
"status": "unaffected"
},
{
"version": "7.3",
"lessThanOrEqual": "*",
"versionType": "original_commit_for_fix",
"status": "unaffected"
}
]
}
]
}
],
"metrics": {},
"references": [
{
"url": "https://git.kernel.org/stable/c/695063fc57574dd117b1bc750ca189cf03a2caad",
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
},
{
"url": "https://git.kernel.org/stable/c/954ee95a03b4d31d4505591bfaba02c24b75776b",
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
},
{
"url": "https://git.kernel.org/stable/c/a24ba0653f7154e671dc8d2bf64682ab2d042792",
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
},
{
"url": "https://git.kernel.org/stable/c/cca2407794795cecff7f8e5f5a79f4ef6b1d6f6c",
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
},
{
"url": "https://git.kernel.org/stable/c/f28a8e1ba4d67a18e4662e5acefd5a4389322366",
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
}
]
}