CVE-2026-23239
published 2026-03-10CVE-2026-23239: In the Linux kernel, the following vulnerability has been resolved: espintcp: Fix race condition in espintcp_close() This issue was discovered during a code…
PriorityP337high7.8CVSS 3.1
AVLACLPRLUINSUCHIHAH
EPSS
0.10%
1.1th percentile
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().
Affected
15 ranges
| Vendor | Product | Version range | Fixed in |
|---|---|---|---|
| debian | linux | < linux 6.19.6-1 (forky) | linux 6.19.6-1 (forky) |
| linux | linux | — | — |
| linux | linux | >= e27cca96cd68fa2c6814c90f9a1cfd36bb68c593 < f7ad8b1d0e421c524604d5076b73232093490d5c | f7ad8b1d0e421c524604d5076b73232093490d5c |
| linux | linux | >= e27cca96cd68fa2c6814c90f9a1cfd36bb68c593 < 664e9df53226b4505a0894817ecad2c610ab11d8 | 664e9df53226b4505a0894817ecad2c610ab11d8 |
| linux | linux | >= e27cca96cd68fa2c6814c90f9a1cfd36bb68c593 < 022ff7f347588de6e17879a1da6019647b21321b | 022ff7f347588de6e17879a1da6019647b21321b |
| linux | linux | >= e27cca96cd68fa2c6814c90f9a1cfd36bb68c593 < e1512c1db9e8794d8d130addd2615ec27231d994 | e1512c1db9e8794d8d130addd2615ec27231d994 |
| linux | linux_kernel | — | — |
| linux | linux_kernel | >= 0 < 6.19.6-1 | 6.19.6-1 |
| linux | linux_kernel | >= 5.6 < 6.12.75 | 6.12.75 |
| linux | linux_kernel | >= 5.6.0 < 6.12.75 | 6.12.75 |
| linux | linux_kernel | >= 6.13 < 6.18.16 | 6.18.16 |
| linux | linux_kernel | >= 6.13.0 < 6.18.16 | 6.18.16 |
| linux | linux_kernel | >= 6.19 < 6.19.6 | 6.19.6 |
| linux | linux_kernel | >= 6.19.0 < 6.19.6 | 6.19.6 |
| msrc | azl3_kernel_6.6.126.1-1_on_azure_linux_3.0 | — | — |
CVSS provenance
nvdv3.17.8HIGHCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
osv7.8HIGH
vendor_debian7.8HIGH
vendor_redhat7.8HIGH
vendor_msrc7.0HIGH
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GHSA
GHSA-246x-p35q-qhcq: In the Linux kernel, the following vulnerability has been resolved:
espintcp: Fix race condition in espintcp_close()
This issue was discovered durin
ghsa_unreviewed·2026-03-10
CVE-2026-23239 [HIGH] GHSA-246x-p35q-qhcq: In the Linux kernel, the following vulnerability has been resolved:
espintcp: Fix race condition in espintcp_close()
This issue was discovered durin
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().
OSV
espintcp: Fix race condition in espintcp_close()
osv·2026-03-10·CVSS 7.8
CVE-2026-23239 [HIGH] espintcp: Fix race condition in espintcp_close()
espintcp: Fix race condition in espintcp_close()
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().
OSV
CVE-2026-23239: In the Linux kernel, the following vulnerability has been resolved: espintcp: Fix race condition in espintcp_close() This issue was discovered during
osv·2026-03-10·CVSS 7.8
CVE-2026-23239 [HIGH] CVE-2026-23239: In the Linux kernel, the following vulnerability has been resolved: espintcp: Fix race condition in espintcp_close() This issue was discovered during
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().
Red Hat
kernel: Kernel: Race condition in espintcp can lead to denial of service
vendor_redhat·2026-03-10·CVSS 7.8
CVE-2026-23239 [HIGH] CWE-366 kernel: Kernel: Race condition in espintcp can lead to denial of service
kernel: Kernel: Race condition in espintcp can lead to denial of service
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().
A flaw was found in the Linux kernel's espintcp component. A local attacker with
Microsoft
espintcp: Fix race condition in espintcp_close()
vendor_msrc·2026-03-10·CVSS 7.0
CVE-2026-23239 [HIGH] espintcp: Fix race condition in espintcp_close()
espintcp: Fix race condition in espintcp_close()
Mariner: Mariner
Linux: Linux
Customer Action Required: Yes
Debian
CVE-2026-23239: linux - In the Linux kernel, the following vulnerability has been resolved: espintcp: F...
vendor_debian·2026·CVSS 7.8
CVE-2026-23239 [HIGH] CVE-2026-23239: linux - In the Linux kernel, the following vulnerability has been resolved: espintcp: F...
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().
Scope: local
bookworm: open
bullseye: open
forky: resolved (fixed in 6.19.6-1)
sid: resolved (fixed in 6.19.6-1)
trixie: open
No detection rules found.
No public exploits indexed.
Bugzilla
CVE-2026-23239 kernel: Kernel: Race condition in espintcp can lead to denial of service
bugzilla·2026-03-10·CVSS 7.8
CVE-2026-23239 [HIGH] CVE-2026-23239 kernel: Kernel: Race condition in espintcp can lead to denial of service
CVE-2026-23239 kernel: Kernel: Race condition in espintcp can lead to denial of service
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().
Discussion:
Upstream advisory:
https://lore.kernel.org/li
Wiz
CVE-2026-23239 Impact, Exploitability, and Mitigation Steps | Wiz
blogs_wiz·CVSS 7.8
CVE-2026-23239 [HIGH] CVE-2026-23239 Impact, Exploitability, and Mitigation Steps | Wiz
## CVE-2026-23239 :
Linux Kernel vulnerability analysis and mitigation
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().
Source : NVD
## 7.8
Score
Published March 10, 2026
Severity HIGH
CN
2026-03-10
Published