CVE-2026-53274
kernel: net/smc: fix sleep-inside-lock in __smc_setsockopt() causing local DoS
Severity
LowRed Hat Product Security
CVSS 3.1
Review impact separately from score.
Published · June 25, 2026
Updated · July 8, 2026
Description
A flaw was found in the Linux kernel's net/smc component. A local unprivileged user can exploit a logic flaw, specifically a 'sleep-inside-lock' issue within the __smc_setsockopt() function. By providing a specially crafted memory page, an attacker can cause the system to halt execution, leading to a Denial of Service (DoS) by exhausting kernel resources and triggering a hung task watchdog.
CVSS score applicability
The CVSS score(s) listed for this vulnerability do not reflect the associated product's status, and are included for informational purposes to better understand the severity of this vulnerability.
Mitigation
No mitigation is specified in collected source.
CVSS / CWE
CVSS 3.1 · 5.5CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
CWE-821 · Incorrect Synchronization