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GHSA-Q9QW-8FG7-FFWW

Vulnerability from github – Published: 2026-07-19 18:31 – Updated: 2026-07-20 15:32

Details

In the Linux kernel, the following vulnerability has been resolved:

net/mlx5e: Fix use-after-free in mlx5e_tx_reporter_timeout_recover

mlx5e_tx_reporter_timeout_recover() accesses sq->netdev after mlx5e_safe_reopen_channels() has torn down and freed the channel (and its embedded SQs). Replace the three sq->netdev references with priv->netdev which is safe because priv outlives channel teardown.

The netdev_err() call already used priv->netdev for this reason; make the trylock/unlock and health_channel_eq_recover calls consistent.

This fixes the following KASAN splat:

BUG: KASAN: use-after-free in mlx5e_tx_reporter_timeout_recover+0x1dd/0x360 [mlx5_core] Read of size 8 at addr ffff889860ed0b28 by task kworker/u113:2/5277

Call Trace: mlx5e_tx_reporter_timeout_recover+0x1dd/0x360 [mlx5_core] devlink_health_reporter_recover+0xa2/0x150 devlink_health_report+0x254/0x7c0 mlx5e_reporter_tx_timeout+0x297/0x380 [mlx5_core] mlx5e_tx_timeout_work+0x109/0x170 [mlx5_core] process_one_work+0x677/0xf20 worker_thread+0x51f/0xd90 kthread+0x3a5/0x810 ret_from_fork+0x208/0x400 ret_from_fork_asm+0x1a/0x30

Severity

9.8 (Critical)


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

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{
  "affected": [],
  "aliases": [
    "CVE-2026-64122"
  ],
  "database_specific": {
    "cwe_ids": [],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2026-07-19T16:17:53Z",
    "severity": "CRITICAL"
  },
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\nnet/mlx5e: Fix use-after-free in mlx5e_tx_reporter_timeout_recover\n\nmlx5e_tx_reporter_timeout_recover() accesses sq-\u003enetdev after\nmlx5e_safe_reopen_channels() has torn down and freed the channel (and\nits embedded SQs). Replace the three sq-\u003enetdev references with\npriv-\u003enetdev which is safe because priv outlives channel teardown.\n\nThe netdev_err() call already used priv-\u003enetdev for this reason; make\nthe trylock/unlock and health_channel_eq_recover calls consistent.\n\nThis fixes the following KASAN splat:\n\n  BUG: KASAN: use-after-free in mlx5e_tx_reporter_timeout_recover+0x1dd/0x360 [mlx5_core]\n  Read of size 8 at addr ffff889860ed0b28 by task kworker/u113:2/5277\n\n  Call Trace:\n   mlx5e_tx_reporter_timeout_recover+0x1dd/0x360 [mlx5_core]\n   devlink_health_reporter_recover+0xa2/0x150\n   devlink_health_report+0x254/0x7c0\n   mlx5e_reporter_tx_timeout+0x297/0x380 [mlx5_core]\n   mlx5e_tx_timeout_work+0x109/0x170 [mlx5_core]\n   process_one_work+0x677/0xf20\n   worker_thread+0x51f/0xd90\n   kthread+0x3a5/0x810\n   ret_from_fork+0x208/0x400\n   ret_from_fork_asm+0x1a/0x30",
  "id": "GHSA-q9qw-8fg7-ffww",
  "modified": "2026-07-20T15:32:00Z",
  "published": "2026-07-19T18:31:52Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-64122"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/152295aa7dc2c5e046606f7dadc84fce41136446"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/1604a2d68414aa4cc34faac0b7faa9c14455e8d3"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/7d260c5d2d89eb2c8c528d54b576b3aae3e20231"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H",
      "type": "CVSS_V3"
    }
  ]
}

CVE-2026-64122 (GCVE-0-2026-64122)

Vulnerability from cvelistv5 – Published: 2026-07-19 15:40 – Updated: 2026-07-20 13:43

Title

net/mlx5e: Fix use-after-free in mlx5e_tx_reporter_timeout_recover

Summary

In the Linux kernel, the following vulnerability has been resolved: net/mlx5e: Fix use-after-free in mlx5e_tx_reporter_timeout_recover mlx5e_tx_reporter_timeout_recover() accesses sq->netdev after mlx5e_safe_reopen_channels() has torn down and freed the channel (and its embedded SQs). Replace the three sq->netdev references with priv->netdev which is safe because priv outlives channel teardown. The netdev_err() call already used priv->netdev for this reason; make the trylock/unlock and health_channel_eq_recover calls consistent. This fixes the following KASAN splat: BUG: KASAN: use-after-free in mlx5e_tx_reporter_timeout_recover+0x1dd/0x360 [mlx5_core] Read of size 8 at addr ffff889860ed0b28 by task kworker/u113:2/5277 Call Trace: mlx5e_tx_reporter_timeout_recover+0x1dd/0x360 [mlx5_core] devlink_health_reporter_recover+0xa2/0x150 devlink_health_report+0x254/0x7c0 mlx5e_reporter_tx_timeout+0x297/0x380 [mlx5_core] mlx5e_tx_timeout_work+0x109/0x170 [mlx5_core] process_one_work+0x677/0xf20 worker_thread+0x51f/0xd90 kthread+0x3a5/0x810 ret_from_fork+0x208/0x400 ret_from_fork_asm+0x1a/0x30

Severity

9.8 (Critical)


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

Assigner

Linux

References

3 references

URL	Tags
https://git.kernel.org/stable/c/1604a2d68414aa4cc…
https://git.kernel.org/stable/c/152295aa7dc2c5e04…
https://git.kernel.org/stable/c/7d260c5d2d89eb2c8…

Impacted products

2 products

Vendor	Product	Version
Linux	Linux	Affected: 4329514c61abefe4961541b128c549b017bab5ad , < 1604a2d68414aa4cc34faac0b7faa9c14455e8d3 (git) Affected: 83ac0304a2d77519dae1e54c9713cbe1aedf19c9 , < 152295aa7dc2c5e046606f7dadc84fce41136446 (git) Affected: 83ac0304a2d77519dae1e54c9713cbe1aedf19c9 , < 7d260c5d2d89eb2c8c528d54b576b3aae3e20231 (git) Affected: 63f9d5fb4d8040077df801ca3270e2f02d55e0d9 (git) Affected: 6.18.14 , < 6.18.34 (semver) Affected: 6.19.4 , < 6.20 (semver)
Linux	Linux	Affected: 7.0 Unaffected: 0 , < 7.0 (semver) Unaffected: 6.18.34 , ≤ 6.18.* (semver) Unaffected: 7.0.11 , ≤ 7.0.* (semver) Unaffected: 7.1 , ≤ * (original_commit_for_fix)

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{
  "containers": {
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "drivers/net/ethernet/mellanox/mlx5/core/en/reporter_tx.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
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              "version": "4329514c61abefe4961541b128c549b017bab5ad",
              "versionType": "git"
            },
            {
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              "status": "affected",
              "version": "83ac0304a2d77519dae1e54c9713cbe1aedf19c9",
              "versionType": "git"
            },
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              "status": "affected",
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              "versionType": "git"
            },
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              "status": "affected",
              "version": "6.18.14",
              "versionType": "semver"
            },
            {
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              "status": "affected",
              "version": "6.19.4",
              "versionType": "semver"
            }
          ]
        },
        {
          "defaultStatus": "affected",
          "product": "Linux",
          "programFiles": [
            "drivers/net/ethernet/mellanox/mlx5/core/en/reporter_tx.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "7.0"
            },
            {
              "lessThan": "7.0",
              "status": "unaffected",
              "version": "0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.18.*",
              "status": "unaffected",
              "version": "6.18.34",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "7.0.*",
              "status": "unaffected",
              "version": "7.0.11",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "*",
              "status": "unaffected",
              "version": "7.1",
              "versionType": "original_commit_for_fix"
            }
          ]
        }
      ],
      "cpeApplicability": [
        {
          "nodes": [
            {
              "cpeMatch": [
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.18.34",
                  "versionStartIncluding": "6.18.14",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "7.0.11",
                  "versionStartIncluding": "7.0",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
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                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionStartIncluding": "6.19.4",
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              "negate": false,
              "operator": "OR"
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      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nnet/mlx5e: Fix use-after-free in mlx5e_tx_reporter_timeout_recover\n\nmlx5e_tx_reporter_timeout_recover() accesses sq-\u003enetdev after\nmlx5e_safe_reopen_channels() has torn down and freed the channel (and\nits embedded SQs). Replace the three sq-\u003enetdev references with\npriv-\u003enetdev which is safe because priv outlives channel teardown.\n\nThe netdev_err() call already used priv-\u003enetdev for this reason; make\nthe trylock/unlock and health_channel_eq_recover calls consistent.\n\nThis fixes the following KASAN splat:\n\n  BUG: KASAN: use-after-free in mlx5e_tx_reporter_timeout_recover+0x1dd/0x360 [mlx5_core]\n  Read of size 8 at addr ffff889860ed0b28 by task kworker/u113:2/5277\n\n  Call Trace:\n   mlx5e_tx_reporter_timeout_recover+0x1dd/0x360 [mlx5_core]\n   devlink_health_reporter_recover+0xa2/0x150\n   devlink_health_report+0x254/0x7c0\n   mlx5e_reporter_tx_timeout+0x297/0x380 [mlx5_core]\n   mlx5e_tx_timeout_work+0x109/0x170 [mlx5_core]\n   process_one_work+0x677/0xf20\n   worker_thread+0x51f/0xd90\n   kthread+0x3a5/0x810\n   ret_from_fork+0x208/0x400\n   ret_from_fork_asm+0x1a/0x30"
        }
      ],
      "metrics": [
        {
          "cvssV3_1": {
            "baseScore": 9.8,
            "baseSeverity": "CRITICAL",
            "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H",
            "version": "3.1"
          }
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        "dateUpdated": "2026-07-20T13:43:33.309Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
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          "url": "https://git.kernel.org/stable/c/1604a2d68414aa4cc34faac0b7faa9c14455e8d3"
        },
        {
          "url": "https://git.kernel.org/stable/c/152295aa7dc2c5e046606f7dadc84fce41136446"
        },
        {
          "url": "https://git.kernel.org/stable/c/7d260c5d2d89eb2c8c528d54b576b3aae3e20231"
        }
      ],
      "title": "net/mlx5e: Fix use-after-free in mlx5e_tx_reporter_timeout_recover",
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        "engine": "bippy-1.2.0"
      }
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    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "cveId": "CVE-2026-64122",
    "datePublished": "2026-07-19T15:40:20.446Z",
    "dateReserved": "2026-07-19T07:54:57.036Z",
    "dateUpdated": "2026-07-20T13:43:33.309Z",
    "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.

The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base model, served locally by ML-Gateway. They have not been verified by an analyst and are provided for guidance only.

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GHSA-Q9QW-8FG7-FFWW

CVE-2026-64122 (GCVE-0-2026-64122)

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Nomenclature