Vulnerability-Lookup

FKIE_CVE-2026-23239

Vulnerability from fkie_nvd - Published: 2026-03-10 18:18 - Updated: 2026-05-20 19:27

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: espintcp: Fix race condition in espintcp_close() This issue was discovered during a code audit. After cancel_work_sync() is called from espintcp_close(), espintcp_tx_work() can still be scheduled from paths such as the Delayed ACK handler or ksoftirqd. As a result, the espintcp_tx_work() worker may dereference a freed espintcp ctx or sk. The following is a simple race scenario: cpu0 cpu1 espintcp_close() cancel_work_sync(&ctx->work); espintcp_write_space() schedule_work(&ctx->work); To prevent this race condition, cancel_work_sync() is replaced with disable_work_sync().

References

URL	Tags
416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/022ff7f347588de6e17879a1da6019647b21321b	Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/664e9df53226b4505a0894817ecad2c610ab11d8	Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/e1512c1db9e8794d8d130addd2615ec27231d994	Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/f7ad8b1d0e421c524604d5076b73232093490d5c	Patch

Impacted products

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

JSON

To clipboard

{
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    {
      "nodes": [
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              "versionEndExcluding": "6.12.75",
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              "vulnerable": true
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  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nespintcp: Fix race condition in espintcp_close()\n\nThis issue was discovered during a code audit.\n\nAfter cancel_work_sync() is called from espintcp_close(),\nespintcp_tx_work() can still be scheduled from paths such as\nthe Delayed ACK handler or ksoftirqd.\nAs a result, the espintcp_tx_work() worker may dereference a\nfreed espintcp ctx or sk.\n\nThe following is a simple race scenario:\n\n           cpu0                             cpu1\n\n  espintcp_close()\n    cancel_work_sync(\u0026ctx-\u003ework);\n                                     espintcp_write_space()\n                                       schedule_work(\u0026ctx-\u003ework);\n\nTo prevent this race condition, cancel_work_sync() is\nreplaced with disable_work_sync()."
    },
    {
      "lang": "es",
      "value": "En el kernel de Linux, la siguiente vulnerabilidad ha sido resuelta:\n\nespintcp: Correcci\u00f3n de condici\u00f3n de carrera en espintcp_close()\n\nEste problema fue descubierto durante una auditor\u00eda de c\u00f3digo.\n\nDespu\u00e9s de que se llama a cancel_work_sync() desde espintcp_close(), espintcp_tx_work() a\u00fan puede ser programado desde rutas como el gestor de ACK Retrasado o ksoftirqd.\nComo resultado, el trabajador espintcp_tx_work() puede desreferenciar un ctx o sk de espintcp liberado.\n\nEl siguiente es un escenario de condici\u00f3n de carrera simple:\n\n           cpu0                             cpu1\n\n  espintcp_close()\n    cancel_work_sync(\u0026amp;ctx-\u0026gt;work);\n                                     espintcp_write_space()\n                                       schedule_work(\u0026amp;ctx-\u0026gt;work);\n\nPara prevenir esta condici\u00f3n de carrera, cancel_work_sync() es reemplazado por disable_work_sync()."
    }
  ],
  "id": "CVE-2026-23239",
  "lastModified": "2026-05-20T19:27:54.790",
  "metrics": {
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          "attackComplexity": "LOW",
          "attackVector": "LOCAL",
          "availabilityImpact": "HIGH",
          "baseScore": 7.8,
          "baseSeverity": "HIGH",
          "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",
          "version": "3.1"
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        "impactScore": 5.9,
        "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "type": "Secondary"
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  "vulnStatus": "Analyzed",
  "weaknesses": [
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        {
          "lang": "en",
          "value": "CWE-362"
        }
      ],
      "source": "nvd@nist.gov",
      "type": "Primary"
    }
  ]
}

CVE-2026-23239 (GCVE-0-2026-23239)

Vulnerability from cvelistv5 – Published: 2026-03-10 17:28 – Updated: 2026-05-11 22:03

Title

espintcp: Fix race condition in espintcp_close()

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

4 references

URL	Tags
https://git.kernel.org/stable/c/f7ad8b1d0e421c524…
https://git.kernel.org/stable/c/664e9df53226b4505…
https://git.kernel.org/stable/c/022ff7f347588de6e…
https://git.kernel.org/stable/c/e1512c1db9e8794d8…

Impacted products

2 products

Vendor	Product	Version
Linux	Linux	Affected: e27cca96cd68fa2c6814c90f9a1cfd36bb68c593 , < f7ad8b1d0e421c524604d5076b73232093490d5c (git) Affected: e27cca96cd68fa2c6814c90f9a1cfd36bb68c593 , < 664e9df53226b4505a0894817ecad2c610ab11d8 (git) Affected: e27cca96cd68fa2c6814c90f9a1cfd36bb68c593 , < 022ff7f347588de6e17879a1da6019647b21321b (git) Affected: e27cca96cd68fa2c6814c90f9a1cfd36bb68c593 , < e1512c1db9e8794d8d130addd2615ec27231d994 (git)
Linux	Linux	Affected: 5.6 Unaffected: 0 , < 5.6 (semver) Unaffected: 6.12.75 , ≤ 6.12.* (semver) Unaffected: 6.18.16 , ≤ 6.18.* (semver) Unaffected: 6.19.6 , ≤ 6.19.* (semver) Unaffected: 7.0 , ≤ * (original_commit_for_fix)

Show details on NVD website

JSON

To clipboard

{
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      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "net/xfrm/espintcp.c"
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    "dateReserved": "2026-01-13T15:37:45.989Z",
    "dateUpdated": "2026-05-11T22:03:00.906Z",
    "state": "PUBLISHED"
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}

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.

Action not permitted

FKIE_CVE-2026-23239

CVE-2026-23239 (GCVE-0-2026-23239)

Tags

Sightings

Nomenclature