7.8 High

CVE-2026-53400 In the Linux kernel, the following vulnerability has been resolved: i2c: core: fix adapter registration race Adapters…

Description

In the Linux kernel, the following vulnerability has been resolved: i2c: core: fix adapter registration race Adapters can be looked up based on their id using i2c_get_adapter() which takes a reference to the embedded struct device. Make sure that the adapter (including its struct device) has been initialised before adding it to the IDR to avoid accessing uninitialised data which could, for example, lead to NULL-pointer dereferences or use-after-free. Note that the i2c-dev chardev, which is registered from a bus notifier, currently uses i2c_get_adapter() so the adapter needs to be added to the IDR before registration.

Affected products and versions

Product	Affected versions	Fixed in
Linux 7.2	earliest → < 7.2	7.2
Linux 7.1	earliest → < 7.1.3	7.1.3
Linux 6.18	earliest → < 6.18.38	6.18.38
Linux 6.12	earliest → < 6.12.95	6.12.95
Linux 6.6	earliest → < 6.6.145	6.6.145
Linux 6.1	earliest → < 6.1.178	6.1.178
Linux 5.15	earliest → < 5.15.212	5.15.212
Linux 5.10	earliest → < 5.10.261	5.10.261
Linux	2.6.22	No fix stated

Show the 3 other branches

Product	Affected versions	Fixed in
SIMATIC S7-1500 CPU 1518-4 PN/DP MFP 3.1	3.1.7 → latest	No fix stated
SIMATIC S7-1500 CPU 1518F-4 PN/DP MFP 3.1	3.1.7 → latest	No fix stated
SIPLUS S7-1500 CPU 1518-4 PN/DP MFP 3.1	3.1.7 → latest	No fix stated