{"id":"CVE-2025-71087","revision":"af302856de9f4cd6bb68c8415866465f","records":[{"revision":"af302856de9f4cd6bb68c8415866465f","observedAt":"2026-10-23T15:48:27.903+00:00","statement":{"source":"cve-program","id":"CVE-2025-71087","aliases":[],"title":"iavf: fix off-by-one issues in iavf_config_rss_reg()","description":"In the Linux kernel, the following vulnerability has been resolved:\n\niavf: fix off-by-one issues in iavf_config_rss_reg()\n\nThere are off-by-one bugs when configuring RSS hash key and lookup\ntable, causing out-of-bounds reads to memory [1] and out-of-bounds\nwrites to device registers.\n\nBefore commit 43a3d9ba34c9 (\"i40evf: Allow PF driver to configure RSS\"),\nthe loop upper bounds were:\n i <= I40E_VFQF_{HKEY,HLUT}_MAX_INDEX\nwhich is safe since the value is the last valid index.\n\nThat commit changed the bounds to:\n i <= adapter->rss_{key,lut}_size / 4\nwhere `rss_{key,lut}_size / 4` is the number of dwords, so the last\nvalid index is `(rss_{key,lut}_size / 4) - 1`. Therefore, using `<=`\naccesses one element past the end.\n\nFix the issues by using `<` instead of `<=`, ensuring we do not exceed\nthe bounds.\n\n[1] KASAN splat about rss_key_size off-by-one\n BUG: KASAN: slab-out-of-bounds in iavf_config_rss+0x619/0x800\n Read of size 4 at addr ffff888102c50134 by task kworker/u8:6/63\n\n CPU: 0 UID: 0 PID: 63 Comm: kworker/u8:6 Not tainted 6.18.0-rc2-enjuk-tnguy-00378-g3005f5b77652-dirty #156 PREEMPT(voluntary)\n Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2 04/01/2014\n Workqueue: iavf iavf_watchdog_task\n Call Trace:\n \n dump_stack_lvl+0x6f/0xb0\n print_report+0x170/0x4f3\n kasan_report+0xe1/0x1a0\n iavf_config_rss+0x619/0x800\n iavf_watchdog_task+0x2be7/0x3230\n process_one_work+0x7fd/0x1420\n worker_thread+0x4d1/0xd40\n kthread+0x344/0x660\n ret_from_fork+0x249/0x320\n ret_from_fork_asm+0x1a/0x30\n \n\n Allocated by task 63:\n kasan_save_stack+0x30/0x50\n kasan_save_track+0x14/0x30\n __kasan_kmalloc+0x7f/0x90\n __kmalloc_noprof+0x246/0x6f0\n iavf_watchdog_task+0x28fc/0x3230\n process_one_work+0x7fd/0x1420\n worker_thread+0x4d1/0xd40\n kthread+0x344/0x660\n ret_from_fork+0x249/0x320\n ret_from_fork_asm+0x1a/0x30\n\n The buggy address belongs to the object at ffff888102c50100\n which belongs to the cache kmalloc-64 of size 64\n The buggy address is located 0 bytes to the right of\n allocated 52-byte region [ffff888102c50100, ffff888102c50134)\n\n The buggy address belongs to the physical page:\n page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x102c50\n flags: 0x200000000000000(node=0|zone=2)\n page_type: f5(slab)\n raw: 0200000000000000 ffff8881000418c0 dead000000000122 0000000000000000\n raw: 0000000000000000 0000000080200020 00000000f5000000 0000000000000000\n page dumped because: kasan: bad access detected\n\n Memory state around the buggy address:\n ffff888102c50000: 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc fc\n ffff888102c50080: 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc fc\n >ffff888102c50100: 00 00 00 00 00 00 04 fc fc fc fc fc fc fc fc fc\n ^\n ffff888102c50180: 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc\n ffff888102c50200: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc","state":0,"publishedAt":"2026-01-13T15:34:49.691+00:00","modifiedAt":"2026-10-19T18:15:11.876+00:00","affected":[{"ecosystem":"Vendor product","name":"Linux","ranges":[],"versions":[],"rawVersionEvidence":"{\n \"product\": \"Linux\",\n \"vendor\": \"Linux\",\n \"defaultStatus\": \"unaffected\",\n \"repo\": \"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\",\n \"programFiles\": [\n \"drivers/net/ethernet/intel/iavf/iavf_main.c\"\n ],\n \"versions\": [\n {\n \"version\": \"43a3d9ba34c9ca313573201d3f45de5ab3494cec\",\n \"lessThan\": \"ceb8459df28d22c225a82d74c0f725f2a935d194\",\n \"status\": \"affected\",\n \"versionType\": \"git\"\n },\n {\n \"version\": \"43a3d9ba34c9ca313573201d3f45de5ab3494cec\",\n \"lessThan\": \"5bb18bfd505ca1affbca921462c350095a6c798c\",\n \"status\": \"affected\",\n \"versionType\": \"git\"\n },\n {\n \"version\": \"43a3d9ba34c9ca313573201d3f45de5ab3494cec\",\n \"lessThan\": \"d7369dc8dd7cbf5cee3a22610028d847b6f02982\",\n \"status\": \"affected\",\n \"versionType\": \"git\"\n },\n {\n \"version\": \"43a3d9ba34c9ca313573201d3f45de5ab3494cec\",\n \"lessThan\": \"18de0e41d69d97fab10b91fecf10ae78a5e43232\",\n \"status\": \"affected\",\n \"versionType\": \"git\"\n },\n {\n \"version\": \"43a3d9ba34c9ca313573201d3f45de5ab3494cec\",\n \"lessThan\": \"f36de3045d006e6d9be1be495f2ed88d1721e752\",\n \"status\": \"affected\",\n \"versionType\": \"git\"\n },\n {\n \"version\": \"43a3d9ba34c9ca313573201d3f45de5ab3494cec\",\n \"lessThan\": \"3095228e1320371e143835d0cebeef1a8a754c66\",\n \"status\": \"affected\",\n \"versionType\": \"git\"\n },\n {\n \"version\": \"43a3d9ba34c9ca313573201d3f45de5ab3494cec\",\n \"lessThan\": \"6daa2893f323981c7894c68440823326e93a7d61\",\n \"status\": \"affected\",\n \"versionType\": \"git\"\n }\n ]\n }"},{"ecosystem":"Vendor product","name":"Linux","ranges":[],"versions":[],"rawVersionEvidence":"{\n \"product\": \"Linux\",\n \"vendor\": \"Linux\",\n \"defaultStatus\": \"affected\",\n \"repo\": \"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\",\n \"programFiles\": [\n \"drivers/net/ethernet/intel/iavf/iavf_main.c\"\n ],\n \"versions\": [\n {\n \"version\": \"4.7\",\n \"status\": \"affected\"\n },\n {\n \"version\": \"0\",\n \"lessThan\": \"4.7\",\n \"status\": \"unaffected\",\n \"versionType\": \"semver\"\n },\n {\n \"version\": \"5.10.248\",\n \"lessThanOrEqual\": \"5.10.*\",\n \"status\": \"unaffected\",\n \"versionType\": \"semver\"\n },\n {\n \"version\": \"5.15.198\",\n \"lessThanOrEqual\": \"5.15.*\",\n \"status\": \"unaffected\",\n \"versionType\": \"semver\"\n },\n {\n \"version\": \"6.1.160\",\n \"lessThanOrEqual\": \"6.1.*\",\n \"status\": \"unaffected\",\n \"versionType\": \"semver\"\n },\n {\n \"version\": \"6.6.120\",\n \"lessThanOrEqual\": \"6.6.*\",\n \"status\": \"unaffected\",\n \"versionType\": \"semver\"\n },\n {\n \"version\": \"6.12.64\",\n \"lessThanOrEqual\": \"6.12.*\",\n \"status\": \"unaffected\",\n \"versionType\": \"semver\"\n },\n {\n \"version\": \"6.18.4\",\n \"lessThanOrEqual\": \"6.18.*\",\n \"status\": \"unaffected\",\n \"versionType\": \"semver\"\n },\n {\n \"version\": \"6.19\",\n \"lessThanOrEqual\": \"*\",\n \"status\": \"unaffected\",\n \"versionType\": \"original_commit_for_fix\"\n }\n ]\n }"}],"metrics":[],"references":["https://git.kernel.org/stable/c/ceb8459df28d22c225a82d74c0f725f2a935d194","https://git.kernel.org/stable/c/5bb18bfd505ca1affbca921462c350095a6c798c","https://git.kernel.org/stable/c/d7369dc8dd7cbf5cee3a22610028d847b6f02982","https://git.kernel.org/stable/c/18de0e41d69d97fab10b91fecf10ae78a5e43232","https://git.kernel.org/stable/c/f36de3045d006e6d9be1be495f2ed88d1721e752","https://git.kernel.org/stable/c/3095228e1320371e143835d0cebeef1a8a754c66","https://git.kernel.org/stable/c/6daa2893f323981c7894c68440823326e93a7d61"],"sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2025-71087","license":"CVE Program Terms of Use","key":"cve-program:CVE-2025-71087","identifiers":["CVE-2025-71087"]},"retained":false,"historicalAffected":[]}],"coverage":[]}