Advisory LSN-0122-1: Linux kernel security fixes (Ubuntu Security)
Advisory dated 7 October 2026 listing Linux kernel fixes for use-after-free flaws, memory corruption, race conditions and issues in drivers and filesystems.
Advisory LSN-0122-1, published on 7 October 2026 in the Ubuntu Security feed, collects numerous Linux kernel fixes. The available text is a machine translation and lists, among others, these entries: a use-after-free in the dlm midcomms commit; a NULL pointer dereference in brcmf_sdiod_sglist_rw in the brcmfmac driver, triggered by a high sd_sgentry_align value (for example, 512) and many queued packets; a use-after-free in padata_reorder, found with the ltp test pcrypt_aead01; a use-after-free in geneve_find_dev; and a use-after-free in ksmbd_sessions_deregister in multichannel mode.
It also includes: type confusion in geneve_opt in netfilter nft_tunnel; ignoring xattrs past the end in ext4; a use-after-free in __smb2_lease_break_noti and a dangling pointer in krb_authenticate in ksmbd; a use-after-free in hfsc_dequeue in net_sched (CVE-2025-37823); and removal of an incorrect sb->s_sequence check in jbd2. The text received is truncated at the last item. To check the full content, consult the original advisory on the Ubuntu security notices page, searching for the identifier LSN-0122-1, and compare it with the kernel version you have installed.