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

CVE-2025-37890 affects the Linux kernel net_sched hfsc when a class has a netem child qdisc. The root cause is a use-after-free in class insertion into the vttree/eltree, which can occur in reentrant scenarios; the patch validates n_active to prevent double insertion. The fix is a kernel patch in...

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...

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...

SUSE CVE-2025-37823

In the Linux kernel, the following vulnerability has been resolved: netsched: hfsc: Fix a potential UAF in hfscdequeue too Similarly to the previous patch, we need to safe guard hfscdequeue too. But for this one, we don't have a reliable reproducer...

DEBIAN-CVE-2025-37823

In the Linux kernel, the following vulnerability has been resolved: netsched: hfsc: Fix a potential UAF in hfscdequeue too Similarly to the previous patch, we need to safe guard hfscdequeue too. But for this one, we don't have a reliable reproducer...

CVE-2025-37823

In the Linux kernel, the following vulnerability has been resolved: netsched: hfsc: Fix a potential UAF in hfscdequeue too Similarly to the previous patch, we need to safe guard hfscdequeue too. But for this one, we don't have a reliable reproducer...

UBUNTU-CVE-2025-37823

In the Linux kernel, the following vulnerability has been resolved: netsched: hfsc: Fix a potential UAF in hfscdequeue too Similarly to the previous patch, we need to safe guard hfscdequeue too. But for this one, we don't have a reliable reproducer...

CVE-2025-37823 net_sched: hfsc: Fix a potential UAF in hfsc_dequeue() too

In the Linux kernel, the following vulnerability has been resolved: netsched: hfsc: Fix a potential UAF in hfscdequeue too Similarly to the previous patch, we need to safe guard hfscdequeue too. But for this one, we don't have a reliable reproducer...

CVE-2025-37797

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...

CVE-2025-37797

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...

UBUNTU-CVE-2025-37797

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...

CVE-2025-37797

CVE-2025-37797 affects the Linux kernel HFSC qdisc. A Use-After-Free can occur in hfsc_change_class() when handling certain child qdiscs (e.g., netem, codel) due to a time-of-check/time-of-use race: hfsc_change_class() may add a class to vttree after qdisc_peek_len() potentially clears the queue....

CVE-2025-37797 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...

CVE-2025-37797

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...

CVE-2025-37797 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...

PT-2025-21643

Name of the Vulnerable Software and Affected Versions: Linux kernel affected versions not specified Description: A Use After Free UAF vulnerability has been identified in the Linux kernel's HFSC network scheduler when it has a netem child qdisc. The issue arises because the HFSC assumes 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...