CVE-2026-23239 (GCVE-0-2026-23239)
Vulnerability from cvelistv5 – Published: 2026-03-10 17:28 – Updated: 2026-03-10 17:28
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 ?
No CVSS data available.
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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"programFiles": [
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"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()."
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"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
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"url": "https://git.kernel.org/stable/c/e1512c1db9e8794d8d130addd2615ec27231d994"
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"title": "espintcp: Fix race condition in espintcp_close()",
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"cveId": "CVE-2026-23239",
"datePublished": "2026-03-10T17:28:26.190Z",
"dateReserved": "2026-01-13T15:37:45.989Z",
"dateUpdated": "2026-03-10T17:28:26.190Z",
"state": "PUBLISHED"
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}
}
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Sightings
| Author | Source | Type | Date |
|---|
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.
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