Linux Distros Unpatched Vulnerability : CVE-2026-53260

The Linux/Unix host has one or more packages installed that are impacted by a vulnerability without a vendor supplied patch available. - tcp: Add preemptdisable,enablenested in reqskqueuehashreq. syzbot reported a weird reqsk-rskrefcnt underflow in inetcskreqskqueuedrop. The captured reqskput in...

SUSE CVE-2026-53260

In the Linux kernel, the following vulnerability has been resolved: tcp: Add preemptdisable,enablenested in reqskqueuehashreq. syzbot reported a weird reqsk-rskrefcnt underflow in inetcskreqskqueuedrop. The captured reqskput in inetcskreqskqueuedrop is called only when it successfully removes req...

CVE-2026-53260

In the Linux kernel, the following vulnerability has been resolved: tcp: Add preemptdisable,enablenested in reqskqueuehashreq. syzbot reported a weird reqsk-rskrefcnt underflow in inetcskreqskqueuedrop. The captured reqskput in inetcskreqskqueuedrop is called only when it successfully removes req...

CVE-2026-53260 tcp: Add preempt_{disable,enable}_nested() in reqsk_queue_hash_req().

In the Linux kernel, the following vulnerability has been resolved: tcp: Add preemptdisable,enablenested in reqskqueuehashreq. syzbot reported a weird reqsk-rskrefcnt underflow in inetcskreqskqueuedrop. The captured reqskput in inetcskreqskqueuedrop is called only when it successfully removes req...

CVE-2026-53260

Summary: CVE-2026-53260 relates to the Linux kernel tcp request-socket (reqsk) handling. The issue stems from a potential refcount underflow in __inet_csk_reqsk_queue_drop(), triggered when a reqsk is preempted between mod_timer() and refcount_set() during the queue/hash insertion path, causing t...

EUVD-2026-39211

In the Linux kernel, the following vulnerability has been resolved: tcp: Add preemptdisable,enablenested in reqskqueuehashreq. syzbot reported a weird reqsk-rskrefcnt underflow in inetcskreqskqueuedrop. The captured reqskput in inetcskreqskqueuedrop is called only when it successfully removes req...

CVE-2026-53260

In the Linux kernel, the following vulnerability has been resolved: tcp: Add preemptdisable,enablenested in reqskqueuehashreq. syzbot reported a weird reqsk-rskrefcnt underflow in inetcskreqskqueuedrop. The captured reqskput in inetcskreqskqueuedrop is called only when it successfully removes req...

CVE-2026-53260 tcp: Add preempt_{disable,enable}_nested() in reqsk_queue_hash_req().

In the Linux kernel, the following vulnerability has been resolved: tcp: Add preemptdisable,enablenested in reqskqueuehashreq. syzbot reported a weird reqsk-rskrefcnt underflow in inetcskreqskqueuedrop. The captured reqskput in inetcskreqskqueuedrop is called only when it successfully removes req...

PT-2026-52355

Name of the Vulnerable Software and Affected Versions Linux kernel affected versions not specified Description An issue exists in the TCP implementation where a reference count underflow can occur in the inet csk reqsk queue drop function, potentially leading to a use-after-free condition. This...

Astra Linux – Vulnerability in Linux 6.1

In the Linux kernel, the following vulnerability has been resolved: rds: tcp: Fixed an issue where a use-after-free occurred in net in reqsktimerhandler. syzkaller reported a warning regarding the netns tracker 0, followed by KASAN, SPLAT 1, and another ref tracker warning 1. syzkaller was unable...

Astra Linux – Vulnerability found in Linux 6.1, Linux 5.15

In the Linux kernel, the following vulnerability has been resolved: TCP: Fixed the use-of-memory issue in nreq in reqsktimerhandler. The referenced commit replaced inetcskreqskqueuedropandput with inetcskreqskqueuedrop and reqskput in reqsktimerhandler. Next, oreq should be passed to reqskput...

MiracleLinux 8 : kernel-4.18.0-553.63.1.el8_10 (AXSA:2025-10602:47)

The remote MiracleLinux 8 host has packages installed that are affected by multiple vulnerabilities as referenced in the AXSA:2025-10602:47 advisory. kernel: tcp/dccp: Don't use timerpending in reqskqueueunlink. CVE-2024-50154 kernel: net: ch9200: fix uninitialised access during miinwayrestart...

SUSE CVE-2025-40186

In the Linux kernel, the following vulnerability has been resolved: tcp: Don't call reqskfastopenremove in tcpconnrequest. syzbot reported the splat below in tcpconnrequest. 0 If a listener is closed while a TFO socket is being processed in tcpconnrequest, inetcskreqskqueueadd does not set reqsk-...

CVE-2025-40186 tcp: Don't call reqsk_fastopen_remove() in tcp_conn_request().

In the Linux kernel, the following vulnerability has been resolved: tcp: Don't call reqskfastopenremove in tcpconnrequest. syzbot reported the splat below in tcpconnrequest. 0 If a listener is closed while a TFO socket is being processed in tcpconnrequest, inetcskreqskqueueadd does not set reqsk-...

Linux kernel 安全漏洞

Linux kernel is the kernel used by Linux, the open source operating system of the Linux Foundation in the United States. A security vulnerability exists in Linux kernel that originates from an incorrect call to reqskfastopenremove in tcpconnrequest, which could result in a reference count underfl...

SUSE SLES15 Security Update : kernel (Live Patch 4 for SLE 15 SP6) (SUSE-SU-2025:03566-1)

The remote SUSE Linux SLES15 host has a package installed that is affected by multiple vulnerabilities as referenced in the SUSE-SU-2025:03566-1 advisory. This update for the Linux Kernel 6.4.0-1506002322 fixes several issues. The following security issues were fixed: - CVE-2025-38477: net/sched:...

SUSE-SU-2025:03566-1 Security update for the Linux Kernel (Live Patch 4 for SLE 15 SP6)

This update for the Linux Kernel 6.4.0-1506002322 fixes several issues. The following security issues were fixed: - CVE-2025-38477: net/sched: schqfq: Fix race condition on qfqaggregate bsc1247315. - CVE-2024-53168: sunrpc: fix one UAF issue caused by sunrpc kernel tcp socket bsc1243650. -...

SUSE-SU-2025:03553-1 Security update for the Linux Kernel (Live Patch 19 for SLE 15 SP5)

This update for the Linux Kernel 5.14.21-1505005580 fixes several issues. The following security issues were fixed: - CVE-2024-53168: sunrpc: fix one UAF issue caused by sunrpc kernel tcp socket bsc1243650. - CVE-2024-50154: tcp/dccp: Do not use timerpending in reqskqueueunlink bsc1233072. -...

SUSE-SU-2025:03482-1 Security update for the Linux Kernel (Live Patch 60 for SLE 12 SP5)

This update for the Linux Kernel 4.12.14-122228 fixes several issues. The following security issues were fixed: - CVE-2024-53168: sunrpc: fix one UAF issue caused by sunrpc kernel tcp socket bsc1243650. - CVE-2024-50154: tcp/dccp: Do not use timerpending in reqskqueueunlink bsc1233072. -...

PT-2025-46743

Name of the Vulnerable Software and Affected Versions Linux kernel affected versions not specified Description The Linux kernel contains a flaw in the TCP implementation where calling reqsk fastopen remove within tcp conn request can lead to a use-after-free and a refcount underflow. This occurs...