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

Vulnerability from cvelistv5 – Published: 2026-03-10 17:28 – Updated: 2026-04-02 14:43
VLAI?
Title
espintcp: Fix race condition in espintcp_close()
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().
Severity ?
7.8 (High)
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Assigner
References
Impacted products
Vendor Product Version
Linux Linux Affected: e27cca96cd68fa2c6814c90f9a1cfd36bb68c593 , < f7ad8b1d0e421c524604d5076b73232093490d5c (git)
Affected: e27cca96cd68fa2c6814c90f9a1cfd36bb68c593 , < 664e9df53226b4505a0894817ecad2c610ab11d8 (git)
Affected: e27cca96cd68fa2c6814c90f9a1cfd36bb68c593 , < 022ff7f347588de6e17879a1da6019647b21321b (git)
Affected: e27cca96cd68fa2c6814c90f9a1cfd36bb68c593 , < e1512c1db9e8794d8d130addd2615ec27231d994 (git)
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    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-rc2 , ≤ * (original_commit_for_fix)
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{
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          "programFiles": [
            "net/xfrm/espintcp.c"
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          "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()."
        }
      ],
      "metrics": [
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            "baseSeverity": "HIGH",
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        "dateUpdated": "2026-04-02T14:43:53.374Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
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      "title": "espintcp: Fix race condition in espintcp_close()",
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    "assignerShortName": "Linux",
    "cveId": "CVE-2026-23239",
    "datePublished": "2026-03-10T17:28:26.190Z",
    "dateReserved": "2026-01-13T15:37:45.989Z",
    "dateUpdated": "2026-04-02T14:43:53.374Z",
    "state": "PUBLISHED"
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  }
}


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  • Confirmed: The vulnerability has been validated from an analyst's perspective.
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