{"id":"DEBIAN-CVE-2025-71087","details":"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 \u003c= I40E_VFQF_{HKEY,HLUT}_MAX_INDEX which is safe since the value is the last valid index.  That commit changed the bounds to:     i \u003c= adapter-\u003erss_{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 `\u003c=` accesses one element past the end.  Fix the issues by using `\u003c` instead of `\u003c=`, 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:    \u003cTASK\u003e    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    \u003c/TASK\u003e    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 cache kmalloc-64 of size 64   The buggy address is located 0 bytes to the right of    allocated 52-byte region [ffff888102c50100, ffff888102c50134)    The buggy address belongs to the physical page:   page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x102c50   flags: 0x200000000000000(node=0|zone=2)   page_type: f5(slab)   raw: 0200000000000000 ffff8881000418c0 dead000000000122 0000000000000000   raw: 0000000000000000 0000000080200020 00000000f5000000 0000000000000000   page dumped because: kasan: bad access detected    Memory state around the buggy address:    ffff888102c50000: 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc fc    ffff888102c50080: 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc fc   \u003effff888102c50100: 00 00 00 00 00 00 04 fc fc fc fc fc fc fc fc fc                                        ^    ffff888102c50180: 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc    ffff888102c50200: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc","modified":"2026-09-01T16:06:22.357152473Z","published":"2026-01-13T16:16:08.343Z","upstream":["CVE-2025-71087"],"references":[{"type":"ADVISORY","url":"https://security-tracker.debian.org/tracker/CVE-2025-71087"}],"affected":[{"package":{"name":"linux","ecosystem":"Debian:12","purl":"pkg:deb/debian/linux?arch=source&distro=bookworm"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"6.1.162-1"}]}],"versions":["6.1.106-1","6.1.106-2","6.1.106-3","6.1.112-1","6.1.115-1","6.1.119-1","6.1.123-1","6.1.124-1","6.1.128-1","6.1.129-1","6.1.133-1","6.1.135-1","6.1.137-1","6.1.139-1","6.1.140-1","6.1.147-1","6.1.148-1","6.1.153-1","6.1.158-1","6.1.159-1","6.1.27-1","6.1.37-1","6.1.38-1","6.1.38-2","6.1.38-2~bpo11+1","6.1.38-3","6.1.38-4","6.1.38-4~bpo11+1","6.1.52-1","6.1.55-1","6.1.55-1~bpo11+1","6.1.64-1","6.1.66-1","6.1.67-1","6.1.69-1","6.1.69-1~bpo11+1","6.1.76-1","6.1.76-1~bpo11+1","6.1.82-1","6.1.85-1","6.1.90-1","6.1.90-1~bpo11+1","6.1.94-1","6.1.94-1~bpo11+1","6.1.98-1","6.1.99-1"],"ecosystem_specific":{"urgency":"not 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