Astra Linux – Vulnerability found in Linux 5.10, Linux 6.1, Linux 5.15

In the Linux kernel, the following vulnerability has been resolved: netsched: hfsc: Fixed a UAF vulnerability in class handling This patch addresses a Use-After-Free vulnerability in the HFSC qdisc class handling. The issue arises due to a time-of-check/time-of-use condition in hfscchangeclass,...

kernel: net_sched: hfsc: Fix a UAF vulnerability in class handling

In the Linux kernel, the following vulnerability has been resolved: netsched: hfsc: Fix a UAF vulnerability in class handling This patch fixes a Use-After-Free vulnerability in the HFSC qdisc class handling. The issue occurs due to a time-of-check/time-of-use condition in hfscchangeclass when...

Astra Linux – Vulnerability found in Linux 6.1, Linux 6.12

In the Linux kernel, the following vulnerability has been resolved: netsched: hfsc: A UAF vulnerability has been fixed in classes where netem is a child qdisc. As described in Gerrard’s report 1, there is a UAF case when an hfsc class has a netem child qdisc. The core issue is that hfsc assumes...

CVE-2025-37890

In the Linux kernel, the following vulnerability has been resolved: netsched: hfsc: Fix a UAF vulnerability in class with netem as child qdisc As described in Gerrard's report 1, we have a UAF case when an hfsc class has a netem child qdisc. The crux of the issue is that hfsc is assuming that...

DEBIAN-CVE-2025-37890

In the Linux kernel, the following vulnerability has been resolved: netsched: hfsc: Fix a UAF vulnerability in class with netem as child qdisc As described in Gerrard's report 1, we have a UAF case when an hfsc class has a netem child qdisc. The crux of the issue is that hfsc is assuming that...

CVE-2025-37890 net_sched: hfsc: Fix a UAF vulnerability in class with netem as child qdisc

In the Linux kernel, the following vulnerability has been resolved: netsched: hfsc: Fix a UAF vulnerability in class with netem as child qdisc As described in Gerrard's report 1, we have a UAF case when an hfsc class has a netem child qdisc. The crux of the issue is that hfsc is assuming that...

CVE-2025-37890 net_sched: hfsc: Fix a UAF vulnerability in class with netem as child qdisc

In the Linux kernel, the following vulnerability has been resolved: netsched: hfsc: Fix a UAF vulnerability in class with netem as child qdisc As described in Gerrard's report 1, we have a UAF case when an hfsc class has a netem child qdisc. The crux of the issue is that hfsc is assuming that...

PT-2025-18776

Name of the Vulnerable Software and Affected Versions Linux kernel affected versions not specified Description A Use-After-Free vulnerability has been identified in the HFSC qdisc class handling of the Linux kernel. The issue arises from a time-of-check/time-of-use condition in hfsc change class...

kernel: net/sched: sch_hfsc UAF

A use-after-free flaw was found in the Linux kernel's net/sched: schhfsc HFSC qdisc traffic control component that can be exploited to achieve local privilege escalation. If a class with a link-sharing curve, for example, with the HFSCFSC flag set, has a parent without a link-sharing curve, then...

kernel: net/sched: sch_hfsc UAF

A use-after-free flaw was found in the Linux kernel's net/sched: schhfsc HFSC qdisc traffic control component that can be exploited to achieve local privilege escalation. If a class with a link-sharing curve, for example, with the HFSCFSC flag set, has a parent without a link-sharing curve, then...

kernel: net/sched: sch_hfsc UAF

A use-after-free flaw was found in the Linux kernel's net/sched: schhfsc HFSC qdisc traffic control component that can be exploited to achieve local privilege escalation. If a class with a link-sharing curve, for example, with the HFSCFSC flag set, has a parent without a link-sharing curve, then...

kernel: net/sched: sch_hfsc UAF

A use-after-free flaw was found in the Linux kernel's net/sched: schhfsc HFSC qdisc traffic control component that can be exploited to achieve local privilege escalation. If a class with a link-sharing curve, for example, with the HFSCFSC flag set, has a parent without a link-sharing curve, then...

kernel: net/sched: sch_hfsc UAF

A use-after-free flaw was found in the Linux kernel's net/sched: schhfsc HFSC qdisc traffic control component that can be exploited to achieve local privilege escalation. If a class with a link-sharing curve, for example, with the HFSCFSC flag set, has a parent without a link-sharing curve, then...

kernel: net/sched: sch_hfsc UAF

A use-after-free flaw was found in the Linux kernel's net/sched: schhfsc HFSC qdisc traffic control component that can be exploited to achieve local privilege escalation. If a class with a link-sharing curve, for example, with the HFSCFSC flag set, has a parent without a link-sharing curve, then...

kernel: net/sched: sch_hfsc UAF

A use-after-free flaw was found in the Linux kernel's net/sched: schhfsc HFSC qdisc traffic control component that can be exploited to achieve local privilege escalation. If a class with a link-sharing curve, for example, with the HFSCFSC flag set, has a parent without a link-sharing curve, then...

kernel: net/sched: sch_hfsc UAF

A use-after-free flaw was found in the Linux kernel's net/sched: schhfsc HFSC qdisc traffic control component that can be exploited to achieve local privilege escalation. If a class with a link-sharing curve, for example, with the HFSCFSC flag set, has a parent without a link-sharing curve, then...

kernel: net/sched: sch_hfsc UAF

A use-after-free flaw was found in the Linux kernel's net/sched: schhfsc HFSC qdisc traffic control component that can be exploited to achieve local privilege escalation. If a class with a link-sharing curve, for example, with the HFSCFSC flag set, has a parent without a link-sharing curve, then...

kernel: net/sched: sch_hfsc UAF

A use-after-free flaw was found in the Linux kernel's net/sched: schhfsc HFSC qdisc traffic control component that can be exploited to achieve local privilege escalation. If a class with a link-sharing curve, for example, with the HFSCFSC flag set, has a parent without a link-sharing curve, then...

kernel: net/sched: sch_hfsc UAF

A use-after-free flaw was found in the Linux kernel's net/sched: schhfsc HFSC qdisc traffic control component that can be exploited to achieve local privilege escalation. If a class with a link-sharing curve, for example, with the HFSCFSC flag set, has a parent without a link-sharing curve, then...

kernel: net/sched: sch_hfsc UAF

A use-after-free flaw was found in the Linux kernel's net/sched: schhfsc HFSC qdisc traffic control component that can be exploited to achieve local privilege escalation. If a class with a link-sharing curve, for example, with the HFSCFSC flag set, has a parent without a link-sharing curve, then...