CVE-2026-89887

In the Linux kernel, the following vulnerability has been resolved: media: i2c: ov7740: fix use-after-destroy in remove The ov7740_remove() function had a severe teardown order bug where it destroyed the driver's mutex before freeing the V4L2 control handler which relies on that mutex, leading to a use-after-destroy kernel panic. Furthermore, the driver explicitly called v4l2_ctrl_handler_free() and mutex_destroy() sequentially, but then called ov7740_free_controls() which invokes both of them a second time, resulting in a double-free. This patch fixes the issue by unregistering the subdevice first, and relying exclusively on ov7740_free_controls() to safely tear down the mutex and control handler in the correct order.

CVSS v3 7.8 HIGH

7.8^/10

CVSS v3 : HIGH

Vector :

Exploitability : 1.8 / Impact : 5.9

Attack Vector LOCAL

Attack Complexity LOW

Privileges Required LOW

User Interaction NONE

Confidentiality Impact HIGH

Integrity Impact HIGH

Availability Impact HIGH

Scope UNCHANGED

References

Link	Resource
https://git.kernel.org/stable/c/09453b467990e8ef8fe09f45a685f9a625248d33
https://git.kernel.org/stable/c/25e2505866c577db2661e4d431f0907c6ec9a3b4
https://git.kernel.org/stable/c/5d1b3dea5a44124bab6c14a2d71b977dabed54e7
https://git.kernel.org/stable/c/7512838a19af0a284a58435292243fad21e57ff1
https://git.kernel.org/stable/c/81e9765878d3ac8ad18e3a683332b5d6bc3a0e33
https://git.kernel.org/stable/c/8a02ee6c1c4e88f3a0442bd60d3c77db9a30db5e
https://git.kernel.org/stable/c/9e4693436c7dcf8584002500ce4b434b79bbf9ed
https://git.kernel.org/stable/c/af81f35e4f429e769b784754e1aa4d7a922470ac

Configurations

No configuration.

History

16 Sep 2026, 15:18

Type	Values Removed	Values Added
CVSS	v2 : ~~unknown~~ v3 : ~~unknown~~	v2 : unknown v3 : 7.8

Information

Published : 2026-09-16 11:16

Updated : 2026-09-16 15:18

NVD link : CVE-2026-89887

Mitre link : CVE-2026-89887

CVE.ORG link : CVE-2026-89887

JSON object : View

Products Affected

No product.

CWE

No CWE.

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"version": "7.2.5", "versionType": "semver", "lessThanOrEqual": "7.2.*"}, {"status": "unaffected", "version": "7.3-rc1", "versionType": "original_commit_for_fix", "lessThanOrEqual": "*"}], "programFiles": ["drivers/media/i2c/ov7740.c"], "defaultStatus": "affected"}]}], "published": "2026-09-16T11:16:57.210", "references": [{"url": "https://git.kernel.org/stable/c/09453b467990e8ef8fe09f45a685f9a625248d33", "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}, {"url": "https://git.kernel.org/stable/c/25e2505866c577db2661e4d431f0907c6ec9a3b4", "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}, {"url": "https://git.kernel.org/stable/c/5d1b3dea5a44124bab6c14a2d71b977dabed54e7", "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}, {"url": "https://git.kernel.org/stable/c/7512838a19af0a284a58435292243fad21e57ff1", "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}, {"url": "https://git.kernel.org/stable/c/81e9765878d3ac8ad18e3a683332b5d6bc3a0e33", "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}, {"url": "https://git.kernel.org/stable/c/8a02ee6c1c4e88f3a0442bd60d3c77db9a30db5e", "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}, {"url": "https://git.kernel.org/stable/c/9e4693436c7dcf8584002500ce4b434b79bbf9ed", "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}, {"url": "https://git.kernel.org/stable/c/af81f35e4f429e769b784754e1aa4d7a922470ac", "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}], "vulnStatus": "Received", "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nmedia: i2c: ov7740: fix use-after-destroy in remove\n\nThe ov7740_remove() function had a severe teardown order bug where it\ndestroyed the driver's mutex before freeing the V4L2 control handler\nwhich relies on that mutex, leading to a use-after-destroy kernel panic.\nFurthermore, the driver explicitly called v4l2_ctrl_handler_free() and\nmutex_destroy() sequentially, but then called ov7740_free_controls()\nwhich invokes both of them a second time, resulting in a double-free.\n\nThis patch fixes the issue by unregistering the subdevice first, and\nrelying exclusively on ov7740_free_controls() to safely tear down the\nmutex and control handler in the correct order."}], "lastModified": "2026-09-16T15:18:15.230", "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}