CVE-2026-98218

Summary

In the Linux kernel, the following vulnerability has been resolved:

i2c: atr: fix dangling adapter pointer on add failure

i2c_atr_add_adapter() stores atr->adapter[chan_id] before i2c_add_adapter() so that the I2C bus notifier can match child clients during registration. On failure the channel is freed but the slot was left pointing at freed memory, which can lead to use-after-free in i2c_atr_del_adapter() / cleanup and also block reuse with -EEXIST.

Clear the slot on the i2c_add_adapter() error path before freeing chan.

Affected Software

VendorProductVersion RangeStatus
LinuxLinuxa076a860acae77bbdcbd316541e5552e81fb1772 < 2f5e42edbd232bf705dc5d3a91e06344237e63bbaffected
LinuxLinuxa076a860acae77bbdcbd316541e5552e81fb1772 < 1093835f6aef58a831298d93e0d93f244fa07b84affected
LinuxLinuxa076a860acae77bbdcbd316541e5552e81fb1772 < eabf7a3d33cd9fad106d267d00cc842434de8e02affected
LinuxLinuxa076a860acae77bbdcbd316541e5552e81fb1772 < a57d9592714506556e30188af72dd3bdb9f647b5affected
LinuxLinuxa076a860acae77bbdcbd316541e5552e81fb1772 < ad34235808b63a70ca4989b7a2852923193d06efaffected
LinuxLinux6.6affected
LinuxLinux0 < 6.6unaffected
LinuxLinux6.6.158 <= 6.6.*unaffected
LinuxLinux6.12.112 <= 6.12.*unaffected
LinuxLinux6.18.54 <= 6.18.*unaffected
LinuxLinux7.2.8 <= 7.2.*unaffected
LinuxLinux7.3-rc4 <= *unaffected

Weaknesses

References