CVE-2025-71087 (GCVE-0-2025-71087)

Vulnerability from cvelistv5 – Published: 2026-01-13 15:34 – Updated: 2026-01-13 15:34
VLAI?
Title
iavf: fix off-by-one issues in iavf_config_rss_reg()
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
Severity ?
No CVSS data available.
Assigner
References
Impacted products
Vendor Product Version
Linux Linux Affected: 43a3d9ba34c9ca313573201d3f45de5ab3494cec , < d7369dc8dd7cbf5cee3a22610028d847b6f02982 (git)
Affected: 43a3d9ba34c9ca313573201d3f45de5ab3494cec , < 18de0e41d69d97fab10b91fecf10ae78a5e43232 (git)
Affected: 43a3d9ba34c9ca313573201d3f45de5ab3494cec , < f36de3045d006e6d9be1be495f2ed88d1721e752 (git)
Affected: 43a3d9ba34c9ca313573201d3f45de5ab3494cec , < 3095228e1320371e143835d0cebeef1a8a754c66 (git)
Affected: 43a3d9ba34c9ca313573201d3f45de5ab3494cec , < 6daa2893f323981c7894c68440823326e93a7d61 (git)
Create a notification for this product.
    Linux Linux Affected: 4.7
Unaffected: 0 , < 4.7 (semver)
Unaffected: 6.1.160 , ≤ 6.1.* (semver)
Unaffected: 6.6.120 , ≤ 6.6.* (semver)
Unaffected: 6.12.64 , ≤ 6.12.* (semver)
Unaffected: 6.18.4 , ≤ 6.18.* (semver)
Unaffected: 6.19-rc4 , ≤ * (original_commit_for_fix)
Create a notification for this product.
Show details on NVD website
To clipboard 

{
  "containers": {
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "drivers/net/ethernet/intel/iavf/iavf_main.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "lessThan": "d7369dc8dd7cbf5cee3a22610028d847b6f02982",
              "status": "affected",
              "version": "43a3d9ba34c9ca313573201d3f45de5ab3494cec",
              "versionType": "git"
            },
            {
              "lessThan": "18de0e41d69d97fab10b91fecf10ae78a5e43232",
              "status": "affected",
              "version": "43a3d9ba34c9ca313573201d3f45de5ab3494cec",
              "versionType": "git"
            },
            {
              "lessThan": "f36de3045d006e6d9be1be495f2ed88d1721e752",
              "status": "affected",
              "version": "43a3d9ba34c9ca313573201d3f45de5ab3494cec",
              "versionType": "git"
            },
            {
              "lessThan": "3095228e1320371e143835d0cebeef1a8a754c66",
              "status": "affected",
              "version": "43a3d9ba34c9ca313573201d3f45de5ab3494cec",
              "versionType": "git"
            },
            {
              "lessThan": "6daa2893f323981c7894c68440823326e93a7d61",
              "status": "affected",
              "version": "43a3d9ba34c9ca313573201d3f45de5ab3494cec",
              "versionType": "git"
            }
          ]
        },
        {
          "defaultStatus": "affected",
          "product": "Linux",
          "programFiles": [
            "drivers/net/ethernet/intel/iavf/iavf_main.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "4.7"
            },
            {
              "lessThan": "4.7",
              "status": "unaffected",
              "version": "0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.1.*",
              "status": "unaffected",
              "version": "6.1.160",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.6.*",
              "status": "unaffected",
              "version": "6.6.120",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.12.*",
              "status": "unaffected",
              "version": "6.12.64",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.18.*",
              "status": "unaffected",
              "version": "6.18.4",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "*",
              "status": "unaffected",
              "version": "6.19-rc4",
              "versionType": "original_commit_for_fix"
            }
          ]
        }
      ],
      "cpeApplicability": [
        {
          "nodes": [
            {
              "cpeMatch": [
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.1.160",
                  "versionStartIncluding": "4.7",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.6.120",
                  "versionStartIncluding": "4.7",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.12.64",
                  "versionStartIncluding": "4.7",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.18.4",
                  "versionStartIncluding": "4.7",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.19-rc4",
                  "versionStartIncluding": "4.7",
                  "vulnerable": true
                }
              ],
              "negate": false,
              "operator": "OR"
            }
          ]
        }
      ],
      "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"
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-01-13T15:34:49.691Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
      "references": [
        {
          "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"
        }
      ],
      "title": "iavf: fix off-by-one issues in iavf_config_rss_reg()",
      "x_generator": {
        "engine": "bippy-1.2.0"
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "cveId": "CVE-2025-71087",
    "datePublished": "2026-01-13T15:34:49.691Z",
    "dateReserved": "2026-01-13T15:30:19.649Z",
    "dateUpdated": "2026-01-13T15:34:49.691Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2",
  "vulnerability-lookup:meta": {
    "nvd": "{\"cve\":{\"id\":\"CVE-2025-71087\",\"sourceIdentifier\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"published\":\"2026-01-13T16:16:08.343\",\"lastModified\":\"2026-01-13T16:16:08.343\",\"vulnStatus\":\"Received\",\"cveTags\":[],\"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\"}],\"metrics\":{},\"references\":[{\"url\":\"https://git.kernel.org/stable/c/18de0e41d69d97fab10b91fecf10ae78a5e43232\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/3095228e1320371e143835d0cebeef1a8a754c66\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/6daa2893f323981c7894c68440823326e93a7d61\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/d7369dc8dd7cbf5cee3a22610028d847b6f02982\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/f36de3045d006e6d9be1be495f2ed88d1721e752\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"}]}}"
  }
}


Log in or create an account to share your comment.




Tags
Taxonomy of the tags.




Sightings

Author Source Type Date

Nomenclature

  • Seen: The vulnerability was mentioned, discussed, or observed by the user.
  • Confirmed: The vulnerability has been validated from an analyst's perspective.
  • Published Proof of Concept: A public proof of concept is available for this vulnerability.
  • Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
  • Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
  • Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
  • Not confirmed: The user expressed doubt about the validity of the vulnerability.
  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.



Detection rules are retrieved from Rulezet.