Vulnerability-Lookup

FKIE_CVE-2026-31505

Vulnerability from fkie_nvd - Published: 2026-04-22 14:16 - Updated: 2026-04-28 15:06

Severity ?

7.8 (High) - CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Summary

In the Linux kernel, the following vulnerability has been resolved: iavf: fix out-of-bounds writes in iavf_get_ethtool_stats() iavf incorrectly uses real_num_tx_queues for ETH_SS_STATS. Since the value could change in runtime, we should use num_tx_queues instead. Moreover iavf_get_ethtool_stats() uses num_active_queues while iavf_get_sset_count() and iavf_get_stat_strings() use real_num_tx_queues, which triggers out-of-bounds writes when we do "ethtool -L" and "ethtool -S" simultaneously [1]. For example when we change channels from 1 to 8, Thread 3 could be scheduled before Thread 2, and out-of-bounds writes could be triggered in Thread 3: Thread 1 (ethtool -L) Thread 2 (work) Thread 3 (ethtool -S) iavf_set_channels() ... iavf_alloc_queues() -> num_active_queues = 8 iavf_schedule_finish_config() iavf_get_sset_count() real_num_tx_queues: 1 -> buffer for 1 queue iavf_get_ethtool_stats() num_active_queues: 8 -> out-of-bounds! iavf_finish_config() -> real_num_tx_queues = 8 Use immutable num_tx_queues in all related functions to avoid the issue. [1] BUG: KASAN: vmalloc-out-of-bounds in iavf_add_one_ethtool_stat+0x200/0x270 Write of size 8 at addr ffffc900031c9080 by task ethtool/5800 CPU: 1 UID: 0 PID: 5800 Comm: ethtool Not tainted 6.19.0-enjuk-08403-g8137e3db7f1c #241 PREEMPT(full) Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2 04/01/2014 Call Trace: <TASK> dump_stack_lvl+0x6f/0xb0 print_report+0x170/0x4f3 kasan_report+0xe1/0x180 iavf_add_one_ethtool_stat+0x200/0x270 iavf_get_ethtool_stats+0x14c/0x2e0 __dev_ethtool+0x3d0c/0x5830 dev_ethtool+0x12d/0x270 dev_ioctl+0x53c/0xe30 sock_do_ioctl+0x1a9/0x270 sock_ioctl+0x3d4/0x5e0 __x64_sys_ioctl+0x137/0x1c0 do_syscall_64+0xf3/0x690 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7f7da0e6e36d ... </TASK> The buggy address belongs to a 1-page vmalloc region starting at 0xffffc900031c9000 allocated at __dev_ethtool+0x3cc9/0x5830 The buggy address belongs to the physical page: page: refcount:1 mapcount:0 mapping:0000000000000000 index:0xffff88813a013de0 pfn:0x13a013 flags: 0x200000000000000(node=0|zone=2) raw: 0200000000000000 0000000000000000 dead000000000122 0000000000000000 raw: ffff88813a013de0 0000000000000000 00000001ffffffff 0000000000000000 page dumped because: kasan: bad access detected Memory state around the buggy address: ffffc900031c8f80: f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 ffffc900031c9000: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 >ffffc900031c9080: f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 ^ ffffc900031c9100: f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 ffffc900031c9180: f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8

References

URL	Tags
416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/1f931dee5b726df1940348ec31614d64bac03aa6	Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/bb85741d2dc2be207353a412f51b83697fcbefcf	Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/fdf902bf86a80bf15792a1d20a67a5302498d7f1	Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/fecacfc95f195b99c71c579a472120d0b4ed65fa	Patch

Impacted products

Vendor	Product	Version
linux	linux_kernel	*
linux	linux_kernel	*
linux	linux_kernel	*
linux	linux_kernel	5.17
linux	linux_kernel	7.0
linux	linux_kernel	7.0
linux	linux_kernel	7.0
linux	linux_kernel	7.0
linux	linux_kernel	7.0
linux	linux_kernel	7.0
linux	linux_kernel	7.0

JSON

To clipboard

{
  "configurations": [
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  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "In the Linux kernel, the following vulnerability has been resolved:\n\niavf: fix out-of-bounds writes in iavf_get_ethtool_stats()\n\niavf incorrectly uses real_num_tx_queues for ETH_SS_STATS. Since the\nvalue could change in runtime, we should use num_tx_queues instead.\n\nMoreover iavf_get_ethtool_stats() uses num_active_queues while\niavf_get_sset_count() and iavf_get_stat_strings() use\nreal_num_tx_queues, which triggers out-of-bounds writes when we do\n\"ethtool -L\" and \"ethtool -S\" simultaneously [1].\n\nFor example when we change channels from 1 to 8, Thread 3 could be\nscheduled before Thread 2, and out-of-bounds writes could be triggered\nin Thread 3:\n\nThread 1 (ethtool -L)       Thread 2 (work)        Thread 3 (ethtool -S)\niavf_set_channels()\n...\niavf_alloc_queues()\n-\u003e num_active_queues = 8\niavf_schedule_finish_config()\n                                                   iavf_get_sset_count()\n                                                   real_num_tx_queues: 1\n                                                   -\u003e buffer for 1 queue\n                                                   iavf_get_ethtool_stats()\n                                                   num_active_queues: 8\n                                                   -\u003e out-of-bounds!\n                            iavf_finish_config()\n                            -\u003e real_num_tx_queues = 8\n\nUse immutable num_tx_queues in all related functions to avoid the issue.\n\n[1]\n BUG: KASAN: vmalloc-out-of-bounds in iavf_add_one_ethtool_stat+0x200/0x270\n Write of size 8 at addr ffffc900031c9080 by task ethtool/5800\n\n CPU: 1 UID: 0 PID: 5800 Comm: ethtool Not tainted 6.19.0-enjuk-08403-g8137e3db7f1c #241 PREEMPT(full)\n Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2 04/01/2014\n Call Trace:\n  \u003cTASK\u003e\n  dump_stack_lvl+0x6f/0xb0\n  print_report+0x170/0x4f3\n  kasan_report+0xe1/0x180\n  iavf_add_one_ethtool_stat+0x200/0x270\n  iavf_get_ethtool_stats+0x14c/0x2e0\n  __dev_ethtool+0x3d0c/0x5830\n  dev_ethtool+0x12d/0x270\n  dev_ioctl+0x53c/0xe30\n  sock_do_ioctl+0x1a9/0x270\n  sock_ioctl+0x3d4/0x5e0\n  __x64_sys_ioctl+0x137/0x1c0\n  do_syscall_64+0xf3/0x690\n  entry_SYSCALL_64_after_hwframe+0x77/0x7f\n RIP: 0033:0x7f7da0e6e36d\n ...\n  \u003c/TASK\u003e\n\n The buggy address belongs to a 1-page vmalloc region starting at 0xffffc900031c9000 allocated at __dev_ethtool+0x3cc9/0x5830\n The buggy address belongs to the physical page: page: refcount:1 mapcount:0 mapping:0000000000000000\n index:0xffff88813a013de0 pfn:0x13a013\n flags: 0x200000000000000(node=0|zone=2)\n raw: 0200000000000000 0000000000000000 dead000000000122 0000000000000000\n raw: ffff88813a013de0 0000000000000000 00000001ffffffff 0000000000000000\n page dumped because: kasan: bad access detected\n\n Memory state around the buggy address:\n  ffffc900031c8f80: f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8\n  ffffc900031c9000: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00\n \u003effffc900031c9080: f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8\n                    ^\n  ffffc900031c9100: f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8\n  ffffc900031c9180: f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8"
    }
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  "id": "CVE-2026-31505",
  "lastModified": "2026-04-28T15:06:25.950",
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          "attackComplexity": "LOW",
          "attackVector": "LOCAL",
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          "baseScore": 7.8,
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          "confidentialityImpact": "HIGH",
          "integrityImpact": "HIGH",
          "privilegesRequired": "LOW",
          "scope": "UNCHANGED",
          "userInteraction": "NONE",
          "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
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  "published": "2026-04-22T14:16:49.233",
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  "vulnStatus": "Analyzed",
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          "value": "CWE-787"
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      "source": "nvd@nist.gov",
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}

CVE-2026-31505 (GCVE-0-2026-31505)

Vulnerability from cvelistv5 – Published: 2026-04-22 13:54 – Updated: 2026-04-27 14:03

Title

iavf: fix out-of-bounds writes in iavf_get_ethtool_stats()

Summary

Severity ?

7.8 (High)


                        
                          CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Assigner

Linux

References

URL

Tags

	https://git.kernel.org/stable/c/1f931dee5b726df19…
	https://git.kernel.org/stable/c/bb85741d2dc2be207…
	https://git.kernel.org/stable/c/fdf902bf86a80bf15…
	https://git.kernel.org/stable/c/fecacfc95f195b99c…

Impacted products

Vendor

Product

Version

Linux

Affected: 64430f70ba6fcd5872ac190f4ae3ddee3f48f00d , < 1f931dee5b726df1940348ec31614d64bac03aa6 (git)
Affected: 64430f70ba6fcd5872ac190f4ae3ddee3f48f00d , < bb85741d2dc2be207353a412f51b83697fcbefcf (git)
Affected: 64430f70ba6fcd5872ac190f4ae3ddee3f48f00d , < fdf902bf86a80bf15792a1d20a67a5302498d7f1 (git)
Affected: 64430f70ba6fcd5872ac190f4ae3ddee3f48f00d , < fecacfc95f195b99c71c579a472120d0b4ed65fa (git)

Linux

Affected: 5.17
Unaffected: 0 , < 5.17 (semver)
Unaffected: 6.12.80 , ≤ 6.12.* (semver)
Unaffected: 6.18.21 , ≤ 6.18.* (semver)
Unaffected: 6.19.11 , ≤ 6.19.* (semver)
Unaffected: 7.0 , ≤ * (original_commit_for_fix)

Show details on NVD website

JSON

To clipboard

{
  "containers": {
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "drivers/net/ethernet/intel/iavf/iavf_ethtool.c"
          ],
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          "programFiles": [
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          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
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          "versions": [
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        {
          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\niavf: fix out-of-bounds writes in iavf_get_ethtool_stats()\n\niavf incorrectly uses real_num_tx_queues for ETH_SS_STATS. Since the\nvalue could change in runtime, we should use num_tx_queues instead.\n\nMoreover iavf_get_ethtool_stats() uses num_active_queues while\niavf_get_sset_count() and iavf_get_stat_strings() use\nreal_num_tx_queues, which triggers out-of-bounds writes when we do\n\"ethtool -L\" and \"ethtool -S\" simultaneously [1].\n\nFor example when we change channels from 1 to 8, Thread 3 could be\nscheduled before Thread 2, and out-of-bounds writes could be triggered\nin Thread 3:\n\nThread 1 (ethtool -L)       Thread 2 (work)        Thread 3 (ethtool -S)\niavf_set_channels()\n...\niavf_alloc_queues()\n-\u003e num_active_queues = 8\niavf_schedule_finish_config()\n                                                   iavf_get_sset_count()\n                                                   real_num_tx_queues: 1\n                                                   -\u003e buffer for 1 queue\n                                                   iavf_get_ethtool_stats()\n                                                   num_active_queues: 8\n                                                   -\u003e out-of-bounds!\n                            iavf_finish_config()\n                            -\u003e real_num_tx_queues = 8\n\nUse immutable num_tx_queues in all related functions to avoid the issue.\n\n[1]\n BUG: KASAN: vmalloc-out-of-bounds in iavf_add_one_ethtool_stat+0x200/0x270\n Write of size 8 at addr ffffc900031c9080 by task ethtool/5800\n\n CPU: 1 UID: 0 PID: 5800 Comm: ethtool Not tainted 6.19.0-enjuk-08403-g8137e3db7f1c #241 PREEMPT(full)\n Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2 04/01/2014\n Call Trace:\n  \u003cTASK\u003e\n  dump_stack_lvl+0x6f/0xb0\n  print_report+0x170/0x4f3\n  kasan_report+0xe1/0x180\n  iavf_add_one_ethtool_stat+0x200/0x270\n  iavf_get_ethtool_stats+0x14c/0x2e0\n  __dev_ethtool+0x3d0c/0x5830\n  dev_ethtool+0x12d/0x270\n  dev_ioctl+0x53c/0xe30\n  sock_do_ioctl+0x1a9/0x270\n  sock_ioctl+0x3d4/0x5e0\n  __x64_sys_ioctl+0x137/0x1c0\n  do_syscall_64+0xf3/0x690\n  entry_SYSCALL_64_after_hwframe+0x77/0x7f\n RIP: 0033:0x7f7da0e6e36d\n ...\n  \u003c/TASK\u003e\n\n The buggy address belongs to a 1-page vmalloc region starting at 0xffffc900031c9000 allocated at __dev_ethtool+0x3cc9/0x5830\n The buggy address belongs to the physical page: page: refcount:1 mapcount:0 mapping:0000000000000000\n index:0xffff88813a013de0 pfn:0x13a013\n flags: 0x200000000000000(node=0|zone=2)\n raw: 0200000000000000 0000000000000000 dead000000000122 0000000000000000\n raw: ffff88813a013de0 0000000000000000 00000001ffffffff 0000000000000000\n page dumped because: kasan: bad access detected\n\n Memory state around the buggy address:\n  ffffc900031c8f80: f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8\n  ffffc900031c9000: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00\n \u003effffc900031c9080: f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8\n                    ^\n  ffffc900031c9100: f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8\n  ffffc900031c9180: f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8"
        }
      ],
      "metrics": [
        {
          "cvssV3_1": {
            "baseScore": 7.8,
            "baseSeverity": "HIGH",
            "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
            "version": "3.1"
          }
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-04-27T14:03:43.359Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
      "references": [
        {
          "url": "https://git.kernel.org/stable/c/1f931dee5b726df1940348ec31614d64bac03aa6"
        },
        {
          "url": "https://git.kernel.org/stable/c/bb85741d2dc2be207353a412f51b83697fcbefcf"
        },
        {
          "url": "https://git.kernel.org/stable/c/fdf902bf86a80bf15792a1d20a67a5302498d7f1"
        },
        {
          "url": "https://git.kernel.org/stable/c/fecacfc95f195b99c71c579a472120d0b4ed65fa"
        }
      ],
      "title": "iavf: fix out-of-bounds writes in iavf_get_ethtool_stats()",
      "x_generator": {
        "engine": "bippy-1.2.0"
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "cveId": "CVE-2026-31505",
    "datePublished": "2026-04-22T13:54:24.524Z",
    "dateReserved": "2026-03-09T15:48:24.105Z",
    "dateUpdated": "2026-04-27T14:03:43.359Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}

Sightings

Author	Source	Type	Date	Other

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.

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FKIE_CVE-2026-31505

CVE-2026-31505 (GCVE-0-2026-31505)

Tags

Sightings

Nomenclature