FKIE_CVE-2026-23240

Vulnerability from fkie_nvd - Published: 2026-03-10 18:18 - Updated: 2026-03-11 13:53
Severity ?
Summary
In the Linux kernel, the following vulnerability has been resolved: tls: Fix race condition in tls_sw_cancel_work_tx() This issue was discovered during a code audit. After cancel_delayed_work_sync() is called from tls_sk_proto_close(), tx_work_handler() can still be scheduled from paths such as the Delayed ACK handler or ksoftirqd. As a result, the tx_work_handler() worker may dereference a freed TLS object. The following is a simple race scenario: cpu0 cpu1 tls_sk_proto_close() tls_sw_cancel_work_tx() tls_write_space() tls_sw_write_space() if (!test_and_set_bit(BIT_TX_SCHEDULED, &tx_ctx->tx_bitmask)) set_bit(BIT_TX_SCHEDULED, &ctx->tx_bitmask); cancel_delayed_work_sync(&ctx->tx_work.work); schedule_delayed_work(&tx_ctx->tx_work.work, 0); To prevent this race condition, cancel_delayed_work_sync() is replaced with disable_delayed_work_sync().
References
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/17153f154f80be2b47ebf52840f2d8f724eb2f3b
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/7bb09315f93dce6acc54bf59e5a95ba7365c2be4
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/854cd32bc74fe573353095e90958490e4e4d641b
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/a5de36d6cee74a92c1a21b260bc507e64bc451de
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{
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "In the Linux kernel, the following vulnerability has been resolved:\n\ntls: Fix race condition in tls_sw_cancel_work_tx()\n\nThis issue was discovered during a code audit.\n\nAfter cancel_delayed_work_sync() is called from tls_sk_proto_close(),\ntx_work_handler() can still be scheduled from paths such as the\nDelayed ACK handler or ksoftirqd.\nAs a result, the tx_work_handler() worker may dereference a freed\nTLS object.\n\nThe following is a simple race scenario:\n\n          cpu0                         cpu1\n\ntls_sk_proto_close()\n  tls_sw_cancel_work_tx()\n                                 tls_write_space()\n                                   tls_sw_write_space()\n                                     if (!test_and_set_bit(BIT_TX_SCHEDULED, \u0026tx_ctx-\u003etx_bitmask))\n    set_bit(BIT_TX_SCHEDULED, \u0026ctx-\u003etx_bitmask);\n    cancel_delayed_work_sync(\u0026ctx-\u003etx_work.work);\n                                     schedule_delayed_work(\u0026tx_ctx-\u003etx_work.work, 0);\n\nTo prevent this race condition, cancel_delayed_work_sync() is\nreplaced with disable_delayed_work_sync()."
    },
    {
      "lang": "es",
      "value": "En el kernel de Linux, la siguiente vulnerabilidad ha sido resuelta:\n\ntls: Correcci\u00f3n de condici\u00f3n de carrera en tls_sw_cancel_work_tx()\n\nEste problema fue descubierto durante una auditor\u00eda de c\u00f3digo.\n\nDespu\u00e9s de que se llama a cancel_delayed_work_sync() desde tls_sk_proto_close(), tx_work_handler() a\u00fan puede ser programado desde rutas como el gestor de ACK Retrasado o ksoftirqd. Como resultado, el trabajador tx_work_handler() puede desreferenciar un objeto TLS liberado.\n\nEl siguiente es un escenario de condici\u00f3n de carrera simple:\n\n          cpu0                         cpu1\n\ntls_sk_proto_close()\n  tls_sw_cancel_work_tx()\n                                 tls_write_space()\n                                   tls_sw_write_space()\n                                     if (!test_and_set_bit(BIT_TX_SCHEDULED, \u0026amp;tx_ctx-\u0026gt;tx_bitmask))\n    set_bit(BIT_TX_SCHEDULED, \u0026amp;ctx-\u0026gt;tx_bitmask);\n    cancel_delayed_work_sync(\u0026amp;ctx-\u0026gt;tx_work.work);\n                                     schedule_delayed_work(\u0026amp;tx_ctx-\u0026gt;tx_work.work, 0);\n\nPara prevenir esta condici\u00f3n de carrera, cancel_delayed_work_sync() es reemplazado por disable_delayed_work_sync()."
    }
  ],
  "id": "CVE-2026-23240",
  "lastModified": "2026-03-11T13:53:20.707",
  "metrics": {},
  "published": "2026-03-10T18:18:13.533",
  "references": [
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/17153f154f80be2b47ebf52840f2d8f724eb2f3b"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/7bb09315f93dce6acc54bf59e5a95ba7365c2be4"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/854cd32bc74fe573353095e90958490e4e4d641b"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/a5de36d6cee74a92c1a21b260bc507e64bc451de"
    }
  ],
  "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
  "vulnStatus": "Awaiting Analysis"
}


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