Vulnerability in Linux

[ Description ]Official description

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.

[ Fixes ]Fixes and patches

No fix or interim patch is linked from our sources yet. Check the vendor references below and limit exposure of affected systems until a fix is available.

[ Advisories ]Government CERT advisories

• BSI CERT-Bund5 Oct 2026WID-SEC-2026-3743

  Linux Kernel: Multiple vulnerabilities Translated from German

  Risk mediumCVE-2026-98221CVE-2026-98181CVE-2026-98248+204 more CVEs

[ References ]References

• git.kernel.org/stable/c/1093835f6aef58a831298d93e0d93f244fa07b84
• git.kernel.org/stable/c/2f5e42edbd232bf705dc5d3a91e06344237e63bb
• git.kernel.org/stable/c/a57d9592714506556e30188af72dd3bdb9f647b5
• git.kernel.org/stable/c/ad34235808b63a70ca4989b7a2852923193d06ef
• git.kernel.org/stable/c/eabf7a3d33cd9fad106d267d00cc842434de8e02