CVE-2025-71087 (GCVE-0-2025-71087)
Vulnerability from cvelistv5
Published
2026-01-13 15:34
Modified
2026-06-11 18:44
Severity ?
Summary
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 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 >ffff888102c50100: 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
References
Impacted products
Vendor Product Version
Linux Linux Version: 43a3d9ba34c9ca313573201d3f45de5ab3494cec
Version: 43a3d9ba34c9ca313573201d3f45de5ab3494cec
Version: 43a3d9ba34c9ca313573201d3f45de5ab3494cec
Version: 43a3d9ba34c9ca313573201d3f45de5ab3494cec
Version: 43a3d9ba34c9ca313573201d3f45de5ab3494cec
Version: 43a3d9ba34c9ca313573201d3f45de5ab3494cec
Version: 43a3d9ba34c9ca313573201d3f45de5ab3494cec
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          "value": "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 \u003c= 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 \u003c= adapter-\u003erss_{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 `\u003c=`\naccesses one element past the end.\n\nFix the issues by using `\u003c` instead of `\u003c=`, 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   \u003cTASK\u003e\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   \u003c/TASK\u003e\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  \u003effff888102c50100: 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"
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    "cveId": "CVE-2025-71087",
    "datePublished": "2026-01-13T15:34:49.691Z",
    "dateReserved": "2026-01-13T15:30:19.649Z",
    "dateUpdated": "2026-06-11T18:44:14.263Z",
    "state": "PUBLISHED"
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    "vulnrichment": {
      "containers": "{\"adp\": [{\"title\": \"CISA ADP Vulnrichment\", \"metrics\": [{\"other\": {\"type\": \"ssvc\", \"content\": {\"id\": \"CVE-2025-71087\", \"role\": \"CISA Coordinator\", \"options\": [{\"Exploitation\": \"none\"}, {\"Automatable\": \"no\"}, {\"Technical Impact\": \"partial\"}], \"version\": \"2.0.3\", \"timestamp\": \"2026-06-10T20:41:36.543195Z\"}}}], \"providerMetadata\": {\"orgId\": \"134c704f-9b21-4f2e-91b3-4a467353bcc0\", \"shortName\": \"CISA-ADP\", \"dateUpdated\": \"2026-06-11T17:38:32.494Z\"}}], \"cna\": {\"title\": \"iavf: fix off-by-one issues in iavf_config_rss_reg()\", \"affected\": [{\"repo\": \"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\", \"vendor\": \"Linux\", \"product\": \"Linux\", \"versions\": [{\"status\": \"affected\", \"version\": \"43a3d9ba34c9ca313573201d3f45de5ab3494cec\", \"lessThan\": \"ceb8459df28d22c225a82d74c0f725f2a935d194\", \"versionType\": \"git\"}, {\"status\": \"affected\", \"version\": \"43a3d9ba34c9ca313573201d3f45de5ab3494cec\", \"lessThan\": \"5bb18bfd505ca1affbca921462c350095a6c798c\", \"versionType\": \"git\"}, {\"status\": \"affected\", \"version\": \"43a3d9ba34c9ca313573201d3f45de5ab3494cec\", \"lessThan\": \"d7369dc8dd7cbf5cee3a22610028d847b6f02982\", \"versionType\": \"git\"}, {\"status\": \"affected\", \"version\": \"43a3d9ba34c9ca313573201d3f45de5ab3494cec\", \"lessThan\": \"18de0e41d69d97fab10b91fecf10ae78a5e43232\", \"versionType\": \"git\"}, {\"status\": \"affected\", \"version\": \"43a3d9ba34c9ca313573201d3f45de5ab3494cec\", \"lessThan\": \"f36de3045d006e6d9be1be495f2ed88d1721e752\", \"versionType\": \"git\"}, {\"status\": \"affected\", \"version\": \"43a3d9ba34c9ca313573201d3f45de5ab3494cec\", \"lessThan\": \"3095228e1320371e143835d0cebeef1a8a754c66\", \"versionType\": \"git\"}, {\"status\": \"affected\", \"version\": \"43a3d9ba34c9ca313573201d3f45de5ab3494cec\", \"lessThan\": \"6daa2893f323981c7894c68440823326e93a7d61\", \"versionType\": \"git\"}], \"programFiles\": [\"drivers/net/ethernet/intel/iavf/iavf_main.c\"], \"defaultStatus\": \"unaffected\"}, {\"repo\": \"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\", \"vendor\": \"Linux\", \"product\": \"Linux\", \"versions\": [{\"status\": \"affected\", \"version\": \"4.7\"}, {\"status\": \"unaffected\", \"version\": \"0\", \"lessThan\": \"4.7\", \"versionType\": \"semver\"}, {\"status\": \"unaffected\", \"version\": \"5.10.248\", \"versionType\": \"semver\", \"lessThanOrEqual\": \"5.10.*\"}, {\"status\": \"unaffected\", \"version\": \"5.15.198\", \"versionType\": \"semver\", \"lessThanOrEqual\": \"5.15.*\"}, {\"status\": \"unaffected\", \"version\": \"6.1.160\", \"versionType\": \"semver\", \"lessThanOrEqual\": \"6.1.*\"}, {\"status\": \"unaffected\", \"version\": \"6.6.120\", \"versionType\": \"semver\", \"lessThanOrEqual\": \"6.6.*\"}, {\"status\": \"unaffected\", \"version\": \"6.12.64\", \"versionType\": \"semver\", \"lessThanOrEqual\": \"6.12.*\"}, {\"status\": \"unaffected\", \"version\": \"6.18.4\", \"versionType\": \"semver\", \"lessThanOrEqual\": \"6.18.*\"}, {\"status\": \"unaffected\", \"version\": \"6.19\", \"versionType\": \"original_commit_for_fix\", \"lessThanOrEqual\": \"*\"}], \"programFiles\": [\"drivers/net/ethernet/intel/iavf/iavf_main.c\"], \"defaultStatus\": \"affected\"}], \"references\": [{\"url\": \"https://git.kernel.org/stable/c/ceb8459df28d22c225a82d74c0f725f2a935d194\"}, {\"url\": \"https://git.kernel.org/stable/c/5bb18bfd505ca1affbca921462c350095a6c798c\"}, {\"url\": \"https://git.kernel.org/stable/c/d7369dc8dd7cbf5cee3a22610028d847b6f02982\"}, {\"url\": \"https://git.kernel.org/stable/c/18de0e41d69d97fab10b91fecf10ae78a5e43232\"}, {\"url\": \"https://git.kernel.org/stable/c/f36de3045d006e6d9be1be495f2ed88d1721e752\"}, {\"url\": \"https://git.kernel.org/stable/c/3095228e1320371e143835d0cebeef1a8a754c66\"}, {\"url\": \"https://git.kernel.org/stable/c/6daa2893f323981c7894c68440823326e93a7d61\"}], \"x_generator\": {\"engine\": \"bippy-1.2.0\"}, \"descriptions\": [{\"lang\": \"en\", \"value\": \"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 \u003c= 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 \u003c= adapter-\u003erss_{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 `\u003c=`\\naccesses one element past the end.\\n\\nFix the issues by using `\u003c` instead of `\u003c=`, 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   \u003cTASK\u003e\\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   \u003c/TASK\u003e\\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  \u003effff888102c50100: 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\"}], \"cpeApplicability\": [{\"nodes\": [{\"negate\": false, \"cpeMatch\": [{\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"5.10.248\", \"versionStartIncluding\": \"4.7\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"5.15.198\", \"versionStartIncluding\": \"4.7\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"6.1.160\", \"versionStartIncluding\": \"4.7\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"6.6.120\", \"versionStartIncluding\": \"4.7\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"6.12.64\", \"versionStartIncluding\": \"4.7\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"6.18.4\", \"versionStartIncluding\": \"4.7\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"6.19\", \"versionStartIncluding\": \"4.7\"}], \"operator\": \"OR\"}]}], \"providerMetadata\": {\"orgId\": \"416baaa9-dc9f-4396-8d5f-8c081fb06d67\", \"shortName\": \"Linux\", \"dateUpdated\": \"2026-05-11T21:54:29.688Z\"}}}",
      "cveMetadata": "{\"cveId\": \"CVE-2025-71087\", \"state\": \"PUBLISHED\", \"dateUpdated\": \"2026-06-11T18:44:14.263Z\", \"dateReserved\": \"2026-01-13T15:30:19.649Z\", \"assignerOrgId\": \"416baaa9-dc9f-4396-8d5f-8c081fb06d67\", \"datePublished\": \"2026-01-13T15:34:49.691Z\", \"assignerShortName\": \"Linux\"}",
      "dataType": "CVE_RECORD",
      "dataVersion": "5.2"
    }
  }
}


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