Vulnerability-Lookup

CVE-2023-53426 (GCVE-0-2023-53426)

Vulnerability from cvelistv5 – Published: 2025-09-18 16:04 – Updated: 2026-08-05 09:14

Title

xsk: Fix xsk_diag use-after-free error during socket cleanup

Summary

In the Linux kernel, the following vulnerability has been resolved: xsk: Fix xsk_diag use-after-free error during socket cleanup Fix a use-after-free error that is possible if the xsk_diag interface is used after the socket has been unbound from the device. This can happen either due to the socket being closed or the device disappearing. In the early days of AF_XDP, the way we tested that a socket was not bound to a device was to simply check if the netdevice pointer in the xsk socket structure was NULL. Later, a better system was introduced by having an explicit state variable in the xsk socket struct. For example, the state of a socket that is on the way to being closed and has been unbound from the device is XSK_UNBOUND. The commit in the Fixes tag below deleted the old way of signalling that a socket is unbound, setting dev to NULL. This in the belief that all code using the old way had been exterminated. That was unfortunately not true as the xsk diagnostics code was still using the old way and thus does not work as intended when a socket is going down. Fix this by introducing a test against the state variable. If the socket is in the state XSK_UNBOUND, simply abort the diagnostic's netlink operation.

Severity

7.8 (High)


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

SSVC

Exploitation: none Automatable: no Technical Impact: total

CISA Coordinator · CISA-ADP (v2.0.3)

Decision recorded 2026-01-14 19:13 UTC

CWE

CWE-416 - Use After Free

Assigner

Linux mitre root Scorecard

References

4 references

URL	Tags
https://git.kernel.org/stable/c/5979985f2d6b565b6…
https://git.kernel.org/stable/c/6436973164ea5506a…
https://git.kernel.org/stable/c/595931912357fa350…
https://git.kernel.org/stable/c/3e019d8a05a38abb5…

Impacted products

2 products

Vendor	Product	Version	CPE status
Linux	Linux	Affected: ad7219cd8751bd258b9d1e69ae0654ec00f71875 , < 5979985f2d6b565b6cf0f79a62670a2855c0e96c (git) Affected: 18b1ab7aa76bde181bdb1ab19a87fa9523c32f21 , < 6436973164ea5506a495f39e56be5aea375e7832 (git) Affected: 18b1ab7aa76bde181bdb1ab19a87fa9523c32f21 , < 595931912357fa3507e522a7f8a0a76e423c23e4 (git) Affected: 18b1ab7aa76bde181bdb1ab19a87fa9523c32f21 , < 3e019d8a05a38abb5c85d4f1e85fda964610aa14 (git) Affected: d1579253ffce39986e7a6ab757ac93b2680a665f (git) Affected: 8a2dea162b92c322f3e42eae0c4a74b8d20aa7a9 (git) Affected: 5.15.33 , < 5.15.132 (semver) Affected: 5.16.19 , < 5.17 (semver) Affected: 5.17.2 , < 5.18 (semver)	guessed
Linux	Linux	Affected: 5.18 Unaffected: 0 , < 5.18 (semver) Unaffected: 5.15.132 , ≤ 5.15.* (semver) Unaffected: 6.1.54 , ≤ 6.1.* (semver) Unaffected: 6.5.4 , ≤ 6.5.* (semver) Unaffected: 6.6 , ≤ * (original_commit_for_fix)	guessed

Show details on NVD website

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FKIE_CVE-2023-53426

Vulnerability from fkie_nvd - Published: 2025-09-18 16:15 - Updated: 2026-06-17 06:45

Severity

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

Summary

References

URL	Tags
416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/3e019d8a05a38abb5c85d4f1e85fda964610aa14	Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/595931912357fa3507e522a7f8a0a76e423c23e4	Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/5979985f2d6b565b6cf0f79a62670a2855c0e96c	Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/6436973164ea5506a495f39e56be5aea375e7832	Patch

Impacted products

Vendor	Product	Version
linux	linux_kernel	*
linux	linux_kernel	*
linux	linux_kernel	*
linux	linux_kernel	*

JSON

To clipboard

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}

GHSA-26WC-246G-R3WF

Vulnerability from github – Published: 2025-09-18 18:30 – Updated: 2025-12-11 15:30

Details

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

xsk: Fix xsk_diag use-after-free error during socket cleanup

Fix a use-after-free error that is possible if the xsk_diag interface is used after the socket has been unbound from the device. This can happen either due to the socket being closed or the device disappearing. In the early days of AF_XDP, the way we tested that a socket was not bound to a device was to simply check if the netdevice pointer in the xsk socket structure was NULL. Later, a better system was introduced by having an explicit state variable in the xsk socket struct. For example, the state of a socket that is on the way to being closed and has been unbound from the device is XSK_UNBOUND.

The commit in the Fixes tag below deleted the old way of signalling that a socket is unbound, setting dev to NULL. This in the belief that all code using the old way had been exterminated. That was unfortunately not true as the xsk diagnostics code was still using the old way and thus does not work as intended when a socket is going down. Fix this by introducing a test against the state variable. If the socket is in the state XSK_UNBOUND, simply abort the diagnostic's netlink operation.

Severity

7.8 (High)


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

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{
  "affected": [],
  "aliases": [
    "CVE-2023-53426"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-416"
    ],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2025-09-18T16:15:46Z",
    "severity": "HIGH"
  },
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\nxsk: Fix xsk_diag use-after-free error during socket cleanup\n\nFix a use-after-free error that is possible if the xsk_diag interface\nis used after the socket has been unbound from the device. This can\nhappen either due to the socket being closed or the device\ndisappearing. In the early days of AF_XDP, the way we tested that a\nsocket was not bound to a device was to simply check if the netdevice\npointer in the xsk socket structure was NULL. Later, a better system\nwas introduced by having an explicit state variable in the xsk socket\nstruct. For example, the state of a socket that is on the way to being\nclosed and has been unbound from the device is XSK_UNBOUND.\n\nThe commit in the Fixes tag below deleted the old way of signalling\nthat a socket is unbound, setting dev to NULL. This in the belief that\nall code using the old way had been exterminated. That was\nunfortunately not true as the xsk diagnostics code was still using the\nold way and thus does not work as intended when a socket is going\ndown. Fix this by introducing a test against the state variable. If\nthe socket is in the state XSK_UNBOUND, simply abort the diagnostic\u0027s\nnetlink operation.",
  "id": "GHSA-26wc-246g-r3wf",
  "modified": "2025-12-11T15:30:30Z",
  "published": "2025-09-18T18:30:27Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2023-53426"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/3e019d8a05a38abb5c85d4f1e85fda964610aa14"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/595931912357fa3507e522a7f8a0a76e423c23e4"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/5979985f2d6b565b6cf0f79a62670a2855c0e96c"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/6436973164ea5506a495f39e56be5aea375e7832"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
      "type": "CVSS_V3"
    }
  ]
}

RHSA-2025:20518

Vulnerability from csaf_opensuse - Published: 2025-11-11 09:13 - Updated: 2026-10-02 00:42

Summary

Red Hat Security Advisory: kernel security update

Severity

Moderate

Scope

144 vulnerabilities in this advisory, including CVE-2023-53426.

CVE-2023-53426

A flaw was found in the Linux kernel's xsk_diag interface. This vulnerability, a use-after-free error, occurs when the xsk_diag interface is used after a socket has been unbound from its device, such as during socket closure or device removal. A local attacker could exploit this flaw to cause a system crash, leading to a Denial of Service (DoS).

5.5 (Medium)


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

Fixed: 303 products

https://access.redhat.com/errata/RHSA-2025:20518

Open the full advisory

SUSE-SU-2025:03600-1

Vulnerability from csaf_suse - Published: 2025-10-15 12:54 - Updated: 2026-09-20 17:51

Summary

Security update for the Linux Kernel

Severity

Important

Scope

346 vulnerabilities in this advisory, including CVE-2023-53426.

CVE-2023-53426

5.5 (Medium)


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

Recommended: 222 products

Open the full advisory

SUSE-SU-2025:03634-1

Vulnerability from csaf_suse - Published: 2025-10-17 14:32 - Updated: 2026-09-20 17:53

Summary

Security update for the Linux Kernel

Severity

Important

Scope

445 vulnerabilities in this advisory, including CVE-2023-53426.

CVE-2023-53426

5.5 (Medium)


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

Recommended: 49 products

Open the full advisory

SUSE-SU-2025:20851-1

Vulnerability from csaf_suse - Published: 2025-10-15 16:17 - Updated: 2026-09-20 18:19

Summary

Security update for the Linux Kernel

Severity

Important

Scope

346 vulnerabilities in this advisory, including CVE-2023-53426.

CVE-2023-53426

5.5 (Medium)


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

Recommended: 11 products

Open the full advisory

SUSE-SU-2025:20861-1

Vulnerability from csaf_suse - Published: 2025-10-15 15:17 - Updated: 2026-09-20 18:19

Summary

Security update for the Linux Kernel

Severity

Important

Scope

346 vulnerabilities in this advisory, including CVE-2023-53426.

CVE-2023-53426

5.5 (Medium)


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

Recommended: 17 products

Open the full advisory

SUSE-SU-2025:20870-1

Vulnerability from csaf_suse - Published: 2025-10-23 16:01 - Updated: 2026-09-20 18:19

Summary

Security update for the Linux Kernel

Severity

Important

Scope

346 vulnerabilities in this advisory, including CVE-2023-53426.

CVE-2023-53426

5.5 (Medium)


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

Recommended: 4 products

Open the full advisory

SUSE-SU-2025:20898-1

Vulnerability from csaf_suse - Published: 2025-10-23 13:59 - Updated: 2026-09-20 18:20

Summary

Security update for the Linux Kernel

Severity

Important

Scope

346 vulnerabilities in this advisory, including CVE-2023-53426.

CVE-2023-53426

5.5 (Medium)


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

Recommended: 7 products

Open the full advisory

SUSE-SU-2025:3751-1

Vulnerability from csaf_suse - Published: 2025-10-23 10:25 - Updated: 2026-09-20 18:24

Summary

Security update for the Linux Kernel

Severity

Important

Scope

346 vulnerabilities in this advisory, including CVE-2023-53426.

CVE-2023-53426

5.5 (Medium)


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

Recommended: 41 products

Open the full advisory

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.

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.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
Browse all ATT&CK techniques and the vulnerabilities related to each.

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CVE-2023-53426 (GCVE-0-2023-53426)

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