Cloudanix VulnDB

CVE-2026-23240

Critical · 9.8

CVSS

9.8

EPSS

0.5%

Published

Mar 10, 2026

CISA due date

—

The record

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().

Affected packages

Ecosystem Package Introduced Fixed
openSUSE:Leap 16.0 dtb-aarch64 0 6.12.0-160000.28.1
openSUSE:Leap 16.0 kernel-64kb 0 6.12.0-160000.28.1
openSUSE:Leap 16.0 kernel-azure 0 6.12.0-160000.28.1
openSUSE:Leap 16.0 kernel-default 0 6.12.0-160000.28.1
openSUSE:Leap 16.0 kernel-default-base 0 6.12.0-160000.27.1.160000.2.8
openSUSE:Leap 16.0 kernel-docs 0 6.12.0-160000.28.1
openSUSE:Leap 16.0 kernel-kvmsmall 0 6.12.0-160000.28.1
openSUSE:Leap 16.0 kernel-obs-build 0 6.12.0-160000.28.1
openSUSE:Leap 16.0 kernel-obs-qa 0 6.12.0-160000.28.1
openSUSE:Leap 16.0 kernel-rt 0 6.12.0-160000.28.1
openSUSE:Leap 16.0 kernel-source 0 6.12.0-160000.28.1
openSUSE:Leap 16.0 kernel-syms 0 6.12.0-160000.28.1
openSUSE:Leap 16.0 kernel-zfcpdump 0 6.12.0-160000.28.1
openSUSE:Tumbleweed kernel-source 0 6.19.8-1.1

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