Skip to content
Heist/ feed
Unrated

media: cec: core: Fix kmemleak due to missed rc_free_device() call

Type: advisorySource: Official CVE List1 source record

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.

Announced Source revision 1
Original source ↗

CVE-2026-89900

Primary source · Revision 1

Imported from structured advisory data. Source references identify upstream records or fields; verify affected versions and your deployed configuration.

Security context

Source reference: cve:CVE-2026-89900

Linux

Source reference: /containers/cna/affected/0/product

Affected versions
Not stated in this record
Fixed versions
Not stated in this record
Prerequisites
Not stated in this record

Linux

Source reference: /containers/cna/affected/1/product

Affected versions
Not stated in this record
Fixed versions
Not stated in this record
Prerequisites
Not stated in this record

Structured affected-version data

Original package identities and version rules from this source.

[
  {
    "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
    "vendor": "Linux",
    "product": "Linux",
    "versions": [
      {
        "status": "affected",
        "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"
      }
    ],
    "programFiles": [
      "drivers/media/cec/core/cec-core.c"
    ],
    "defaultStatus": "unaffected"
  },
  {
    "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
    "vendor": "Linux",
    "product": "Linux",
    "versions": [
      {
        "status": "affected",
        "version": "7.1"
      },
      {
        "status": "unaffected",
        "version": "0",
        "lessThan": "7.1",
        "versionType": "semver"
      },
      {
        "status": "unaffected",
        "version": "6.6.157",
        "versionType": "semver",
        "lessThanOrEqual": "6.6.*"
      },
      {
        "status": "unaffected",
        "version": "6.12.110",
        "versionType": "semver",
        "lessThanOrEqual": "6.12.*"
      },
      {
        "status": "unaffected",
        "version": "6.18.51",
        "versionType": "semver",
        "lessThanOrEqual": "6.18.*"
      },
      {
        "status": "unaffected",
        "version": "7.2.5",
        "versionType": "semver",
        "lessThanOrEqual": "7.2.*"
      },
      {
        "status": "unaffected",
        "version": "7.3",
        "versionType": "original_commit_for_fix",
        "lessThanOrEqual": "*"
      }
    ],
    "programFiles": [
      "drivers/media/cec/core/cec-core.c"
    ],
    "defaultStatus": "affected"
  }
]
Related CVEs
CVE-2026-89900

Source reference: /cveMetadata/cveId

Publisher severity

No explicit severity was provided.

Event
#36350 · Revision 1
Added to Heist Feed
Publisher date
Read the original announcement