CVE-2026-31396

Слабость

In the Linux kernel, the following vulnerability has been resolved: net: macb: fix use-after-free access to PTP clock PTP clock is registered on every opening of the interface and destroyed on every closing. However it may be accessed via get_ts_info ethtool call which is possible while the interface is just present in the kernel. BUG: KASAN: use-after-free in ptp_clock_index+0x47/0x50 drivers/ptp/ptp_clock.c:426 Read of size 4 at addr ffff8880194345cc by task syz.0.6/948 CPU: 1 PID: 948 Comm: syz.0.6 Not tainted 6.1.164+ #109 Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS rel-1.16.1-0-g3208b098f51a-prebuilt.qemu.org 04/01/2014 Call Trace: <TASK> __dump_stack lib/dump_stack.c:88 [inline] dump_stack_lvl+0x8d/0xba lib/dump_stack.c:106 print_address_description mm/kasan/report.c:316 [inline] print_report+0x17f/0x496 mm/kasan/report.c:420 kasan_report+0xd9/0x180 mm/kasan/report.c:524 ptp_clock_index+0x47/0x50 drivers/ptp/ptp_clock.c:426 gem_get_ts_info+0x138/0x1e0 drivers/net/ethernet/cadence/macb_main.c:3349 macb_get_ts_info+0x68/0xb0 drivers/net/ethernet/cadence/macb_main.c:3371 __ethtool_get_ts_info+0x17c/0x260 net/ethtool/common.c:558 ethtool_get_ts_info net/ethtool/ioctl

Затронутые продукты

• linux linux_kernel

Источники

• https://git.kernel.org/stable/c/0bb848d8c64938024e45780f8032f1f67d3a3607
• https://git.kernel.org/stable/c/1f4714065b2bcbb0a4013fd355b84b848e6cc345
• https://git.kernel.org/stable/c/341d01087f821aa0f165fb1ffc8bfe4e50776da7
• https://git.kernel.org/stable/c/5653af416a48f6c18f9626ae9df96f814f45ff34
• https://git.kernel.org/stable/c/6b757f345eeea87ed5d8afd6de35b927a1a57a2f
• https://git.kernel.org/stable/c/8820ffe0975fd2efbe50453e9179c8e1c33a13d3