CVE-2026-53339 i2c: qcom-cci: Fix NULL pointer dereference in cci_remove()
A NULL pointer dereference in the Qualcomm CCI I2C driver causes a kernel crash during device unbinding or driver removal.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Local or same network only
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2026-53339?
CVE-2026-53339 is a medium-severity vulnerability in Linux kernel, published on 1 Jul 2026. It can only be exploited from the same machine or local network, with no action from the victim.
Official description
In the Linux kernel, the following vulnerability has been resolved:
i2c: qcom-cci: Fix NULL pointer dereference in cci_remove()
On all modern platforms Qualcomm CCI controller provides two I2C masters, and on particular boards only one I2C master may be initialized, and in such cases the device unbinding or driver removal causes a NULL pointer dereference, because cci_halt() is called for all two I2C masters, but a completion is initialized only for the single enabled master:
% rmmod i2c-qcom-cci Unable to handle kernel NULL pointer dereference at virtual address 0000000000000000 <snip> Call trace: __wait_for_common+0x194/0x1a8 (P) wait_for_completion_timeout+0x20/0x2c cci_remove+0xc4/0x138 [i2c_qcom_cci] platform_remove+0x20/0x30 device_remove+0x4c/0x80 device_release_driver_internal+0x1c8/0x224 driver_detach+0x50/0x98 bus_remove_driver+0x6c/0xbc driver_unregister+0x30/0x60 platform_driver_unregister+0x14/0x20 qcom_cci_driver_exit+0x18/0x1008 [i2c_qcom_cci] ....
Weakness: CWE-476
Which versions are affected by CVE-2026-53339?
It affects 1 product.
Products include Linux kernel.
How do I fix CVE-2026-53339?
Apply the vendor's patch.
Is CVE-2026-53339 being exploited?
There is no known exploitation of CVE-2026-53339 in the wild and no public exploit code.
Other vulnerabilities in Linux kernel
Sources
Also known as BELL-CVE-2026-53339, DEBIAN-CVE-2026-53339, GHSA-3mjw-95xr-9726, ROOT-OS-UBUNTU-2204-CVE-2026-53339, ROOT-OS-UBUNTU-2404-CVE-2026-53339, UBUNTU-CVE-2026-53339.