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CVE-2025-71087: Linux, грешка в паметта

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CVSS

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Вероятност да бъде експлоатирана в следващите 30 дни (EPSS)

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Описание

Оригинално описание

In the Linux kernel, the following vulnerability has been resolved: iavf: fix off-by-one issues in iavf_config_rss_reg() There are off-by-one bugs when configuring RSS hash key and lookup table, causing out-of-bounds reads to memory [1] and out-of-bounds writes to device registers. Before commit 43a3d9ba34c9 ("i40evf: Allow PF driver to configure RSS"), the loop upper bounds were: i <= I40E_VFQF_{HKEY,HLUT}_MAX_INDEX which is safe since the value is the last valid index. That commit changed the bounds to: i <= adapter->rss_{key,lut}_size / 4 where `rss_{key,lut}_size / 4` is the number of dwords, so the last valid index is `(rss_{key,lut}_size / 4) - 1`. Therefore, using `<=` accesses one element past the end. Fix the issues by using `<` instead of `<=`, ensuring we do not exceed the bounds. [1] KASAN splat about rss_key_size off-by-one BUG: KASAN: slab-out-of-bounds in iavf_config_rss+0x619/0x800 Read of size 4 at addr ffff888102c50134 by task kworker/u8:6/63 CPU: 0 UID: 0 PID: 63 Comm: kworker/u8:6 Not tainted 6.18.0-rc2-enjuk-tnguy-00378-g3005f5b77652-dirty #156 PREEMPT(voluntary) Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2 04/01/2014 Workqueue: iavf iavf_watchdog_task Call Trace: <TASK> dump_stack_lvl+0x6f/0xb0 print_report+0x170/0x4f3 kasan_report+0xe1/0x1a0 iavf_config_rss+0x619/0x800 iavf_watchdog_task+0x2be7/0x3230 process_one_work+0x7fd/0x1420 worker_thread+0x4d1/0xd40 kthread+0x344/0x660 ret_from_fork+0x249/0x320 ret_from_fork_asm+0x1a/0x30 </TASK> Allocated by task 63: kasan_save_stack+0x30/0x50 kasan_save_track+0x14/0x30 __kasan_kmalloc+0x7f/0x90 __kmalloc_noprof+0x246/0x6f0 iavf_watchdog_task+0x28fc/0x3230 process_one_work+0x7fd/0x1420 worker_thread+0x4d1/0xd40 kthread+0x344/0x660 ret_from_fork+0x249/0x320 ret_from_fork_asm+0x1a/0x30 The buggy address belongs to the object at ffff888102c50100 which belongs to the cach

Засегнати продукти

  • Linux Linux: 43a3d9ba34c9ca313573201d3f45de5ab3494cec преди ceb8459df28d22c225a82d74c0f725f2a935d194; 43a3d9ba34c9ca313573201d3f45de5ab3494cec преди 5bb18bfd505ca1affbca921462c350095a6c798c; 43a3d9ba34c9ca313573201d3f45de5ab3494cec преди d7369dc8dd7cbf5cee3a22610028d847b6f02982; 43a3d9ba34c9ca313573201d3f45de5ab3494cec преди 18de0e41d69d97fab10b91fecf10ae78a5e43232; 43a3d9ba34c9ca313573201d3f45de5ab3494cec преди f36de3045d006e6d9be1be495f2ed88d1721e752; 43a3d9ba34c9ca313573201d3f45de5ab3494cec преди 3095228e1320371e143835d0cebeef1a8a754c66; 43a3d9ba34c9ca313573201d3f45de5ab3494cec преди 6daa2893f323981c7894c68440823326e93a7d61
  • Linux Linux: 4.7; преди 4.7; 5.10.248 до 5.10.*; 5.15.198 до 5.15.*; 6.1.160 до 6.1.*; 6.6.120 до 6.6.*; 6.12.64 до 6.12.*; 6.18.4 до 6.18.*; 6.19 до *

Вид слабост

История

  • 13 януари 2026 Публикувано

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Първоизточници

CVE-2025-71087: Linux, грешка в паметта | freedomonline.bg