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net/mlx5: E-Switch: fix use-after-free in mlx5_eswitch_termtbl_put

Type: advisorySource: Official CVE List1 source record

In the Linux kernel, the following vulnerability has been resolved: net/mlx5: E-Switch: fix use-after-free in mlx5_eswitch_termtbl_put In mlx5_eswitch_termtbl_put(), the zero-ref cleanup check reads tt->ref_count after termtbl_mutex has been released. Two concurrent callers on the same mlx5_termtbl_handle race: one decrements ref_count to zero, removes the hash entry, and calls kfree(tt) while the other has already dropped the mutex and is about to evaluate if (!tt->ref_count), producing a use-after-free. Fix this by capturing the result of the decrement into a stack-local last variable before dropping the mutex. The cleanup decision is now made entirely under termtbl_mutex, and tt is not touched after kfree.

Announced Group revision 1
Original source ↗

CVE-2026-98015

Primary source · Revision 1

Imported from structured advisory data. Source references identify upstream records or fields; verify affected versions and your deployed configuration.

Security context

Source reference: cve:CVE-2026-98015

Linux

Source reference: /containers/cna/affected/0/product

Affected versions
Not stated in this record
Fixed versions
Not stated in this record
Prerequisites
Not stated in this record

Linux

Source reference: /containers/cna/affected/1/product

Affected versions
Not stated in this record
Fixed versions
Not stated in this record
Prerequisites
Not stated in this record

Structured affected-version data

Original package identities and version rules from this source.

[
  {
    "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
    "vendor": "Linux",
    "product": "Linux",
    "versions": [
      {
        "status": "affected",
        "version": "10caabdaad5ace85577a453da97d1f8d3b944427",
        "lessThan": "e3ee194a790896fa92fea20b5385a354be2f2c12",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "10caabdaad5ace85577a453da97d1f8d3b944427",
        "lessThan": "b1398c9dfb5d3d4faaf6905ff7d98110a5d2c797",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "10caabdaad5ace85577a453da97d1f8d3b944427",
        "lessThan": "92f581cac93a71723456ac79ef54d9f60a251b42",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "10caabdaad5ace85577a453da97d1f8d3b944427",
        "lessThan": "a5833fdf53350b8b95a558fcf0056ddb1c0fe154",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "10caabdaad5ace85577a453da97d1f8d3b944427",
        "lessThan": "304ea40ef4561671503c36e47da44a0a31b71e36",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "10caabdaad5ace85577a453da97d1f8d3b944427",
        "lessThan": "e393789e92310d7c66f57c876101779c90816a12",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "10caabdaad5ace85577a453da97d1f8d3b944427",
        "lessThan": "18b2969073879b9cce24e1a78b118bdad54518d1",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "10caabdaad5ace85577a453da97d1f8d3b944427",
        "lessThan": "7ee07f601f8f507c9faf25c68a49396ab8950596",
        "versionType": "git"
      }
    ],
    "programFiles": [
      "drivers/net/ethernet/mellanox/mlx5/core/eswitch_offloads_termtbl.c"
    ],
    "defaultStatus": "unaffected"
  },
  {
    "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
    "vendor": "Linux",
    "product": "Linux",
    "versions": [
      {
        "status": "affected",
        "version": "5.3"
      },
      {
        "status": "unaffected",
        "version": "0",
        "lessThan": "5.3",
        "versionType": "semver"
      },
      {
        "status": "unaffected",
        "version": "5.10.271",
        "versionType": "semver",
        "lessThanOrEqual": "5.10.*"
      },
      {
        "status": "unaffected",
        "version": "5.15.222",
        "versionType": "semver",
        "lessThanOrEqual": "5.15.*"
      },
      {
        "status": "unaffected",
        "version": "6.1.189",
        "versionType": "semver",
        "lessThanOrEqual": "6.1.*"
      },
      {
        "status": "unaffected",
        "version": "6.6.158",
        "versionType": "semver",
        "lessThanOrEqual": "6.6.*"
      },
      {
        "status": "unaffected",
        "version": "6.12.111",
        "versionType": "semver",
        "lessThanOrEqual": "6.12.*"
      },
      {
        "status": "unaffected",
        "version": "6.18.53",
        "versionType": "semver",
        "lessThanOrEqual": "6.18.*"
      },
      {
        "status": "unaffected",
        "version": "7.2.7",
        "versionType": "semver",
        "lessThanOrEqual": "7.2.*"
      },
      {
        "status": "unaffected",
        "version": "7.3",
        "versionType": "original_commit_for_fix",
        "lessThanOrEqual": "*"
      }
    ],
    "programFiles": [
      "drivers/net/ethernet/mellanox/mlx5/core/eswitch_offloads_termtbl.c"
    ],
    "defaultStatus": "affected"
  }
]
Related CVEs
CVE-2026-98015

Source reference: /cveMetadata/cveId

Publisher severity

No explicit severity was provided.

Event
#38142 · Revision 1
Added to Heist Feed
Publisher date
Read the original announcement

Revision history

  1. CVE-2026-98015 · Revision 1Source updated