Important: kernel security update

ELSA-2026-71329: kernel security update (IMPORTANT)

Security update for the Linux Kernel (Live Patch 85 for SUSE Linux Enterprise 12 SP5)

Security update for the Linux Kernel (Live Patch 84 for SUSE Linux Enterprise 12 SP5)

Security update for the Linux Kernel (Live Patch 86 for SUSE Linux Enterprise 12 SP5)

Security update for the Linux Kernel (Live Patch 83 for SUSE Linux Enterprise 12 SP5)

Security update for the Linux Kernel (Live Patch 80 for SUSE Linux Enterprise 12 SP5)

Security update for the Linux Kernel (Live Patch 77 for SUSE Linux Enterprise 12 SP5)

Security update for the Linux Kernel (Live Patch 78 for SUSE Linux Enterprise 12 SP5)

Security update for the Linux Kernel (Live Patch 75 for SUSE Linux Enterprise 12 SP5)

Security update for the Linux Kernel (Live Patch 58 for SUSE Linux Enterprise 15 SP4)

Security update for the Linux Kernel (Live Patch 44 for SUSE Linux Enterprise 15 SP5)

Security update for the Linux Kernel (Live Patch 76 for SUSE Linux Enterprise 12 SP5)

Security update for the Linux Kernel (Live Patch 72 for SUSE Linux Enterprise 12 SP5)

Security update for the Linux Kernel (Live Patch 20 for SUSE Linux Enterprise 15 SP7)

Security update for the Linux Kernel RT (Live Patch 19 for SUSE Linux Enterprise 15 SP7)

ELSA-2026-71233: kernel security, bug fix, and enhancement update (IMPORTANT)

ELSA-2026-71232: kernel security, bug fix, and enhancement update (IMPORTANT)

Security update for the Linux Kernel

In the Linux kernel, the following vulnerability has been resolved: net: tun: bound receive headroom tun_get_user() uses tun->align both as skb headroom and when choosing how much packet data to keep linear. OVS can propagate an oversized headroom request from another port to TUN or TAP. When align is larger than the usable space in a one-page skb head, SKB_MAX_HEAD(align) underflows and the result becomes negative when stored in good_linear. That value later wraps when assigned to the size_t linear variable, and tun_alloc_skb() can place skb->data outside the allocated head. Bound the headroom stored by TUN to the one-page skb-head budget and the largest non-sentinel 16-bit skb header offset. Leave one linear byte for raw TUN and a complete Ethernet header for TAP, including NET_IP_ALIGN. Also pull the raw-TUN protocol byte and the TAP Ethernet header before accessing them, so these checks remain safe for nonlinear skbs supplied by other allocation paths.