CVE-2022-49669 mptcp: fix race on unaccepted mptcp sockets

In the Linux kernel, the following vulnerability has been resolved: mptcp: fix race on unaccepted mptcp sockets When the listener socket owning the relevant request is closed, it frees the unaccepted subflows and that causes later deletion of the paired MPTCP sockets. The mptcp socket's worker ca...

CVE-2022-49669 mptcp: fix race on unaccepted mptcp sockets

In the Linux kernel, the following vulnerability has been resolved: mptcp: fix race on unaccepted mptcp sockets When the listener socket owning the relevant request is closed, it frees the unaccepted subflows and that causes later deletion of the paired MPTCP sockets. The mptcp socket's worker ca...

CVE-2022-49385 driver: base: fix UAF when driver_attach failed

In the Linux kernel, the following vulnerability has been resolved: driver: base: fix UAF when driverattach failed When driverattachdrv; failed, the driverprivate will be freed. But it has been added to the bus, which caused a UAF. To fix it, we need to delete it from the bus when failed...

CVE-2022-49291 ALSA: pcm: Fix races among concurrent hw_params and hw_free calls

In the Linux kernel, the following vulnerability has been resolved: ALSA: pcm: Fix races among concurrent hwparams and hwfree calls Currently we have neither proper check nor protection against the concurrent calls of PCM hwparams and hwfree ioctls, which may result in a UAF. Since the existing P...

CVE-2022-49288

In the Linux kernel, the following vulnerability has been resolved: ALSA: pcm: Fix races among concurrent prealloc proc writes We have no protection against concurrent PCM buffer preallocation changes via proc files, and it may potentially lead to UAF or some weird problem. This patch applies the...

CVE-2022-49288 ALSA: pcm: Fix races among concurrent prealloc proc writes

In the Linux kernel, the following vulnerability has been resolved: ALSA: pcm: Fix races among concurrent prealloc proc writes We have no protection against concurrent PCM buffer preallocation changes via proc files, and it may potentially lead to UAF or some weird problem. This patch applies the...

CVE-2022-49136 Bluetooth: hci_sync: Fix queuing commands when HCI_UNREGISTER is set

In the Linux kernel, the following vulnerability has been resolved: Bluetooth: hcisync: Fix queuing commands when HCIUNREGISTER is set hcicmdsyncqueue shall return an error if HCIUNREGISTER flag has been set as that means hciunregisterdev has been called so it will likely cause a uaf after the...

CVE-2021-47646 Revert "Revert "block, bfq: honor already-setup queue merges""

In the Linux kernel, the following vulnerability has been resolved: Revert "Revert "block, bfq: honor already-setup queue merges"" A crash 1 happened to be triggered in conjunction with commit 2d52c58b9c9b "block, bfq: honor already-setup queue merges". The latter was then reverted by commit...

CVE-2025-21703

In the Linux kernel, the following vulnerability has been resolved: netem: Update sch-q.qlen before qdisctreereducebacklog qdisctreereducebacklog notifies parent qdisc only if child qdisc becomes empty, therefore we need to reduce the backlog of the child qdisc before calling it. Otherwise it wou...

CVE-2025-21703

Affecting the Linux kernel netem/qdisc path: the issue stems from updating sch->q.qlen before qdisc_tree_reduce_backlog(), causing DRR to miss qlen_notify() and enabling a use-after-free in the active list. CVSS v3.1 indicates high impact (AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H). The Astra Linux ...

CVE-2025-21703 netem: Update sch->q.qlen before qdisc_tree_reduce_backlog()

In the Linux kernel, the following vulnerability has been resolved: netem: Update sch-q.qlen before qdisctreereducebacklog qdisctreereducebacklog notifies parent qdisc only if child qdisc becomes empty, therefore we need to reduce the backlog of the child qdisc before calling it. Otherwise it wou...

CVE-2025-21700 net: sched: Disallow replacing of child qdisc from one parent to another

In the Linux kernel, the following vulnerability has been resolved: net: sched: Disallow replacing of child qdisc from one parent to another Lion Ackermann was able to create a UAF which can be abused for privilege escalation with the following script Step 1. create root qdisc tc qdisc add dev lo...

CVE-2025-21700 net: sched: Disallow replacing of child qdisc from one parent to another

In the Linux kernel, the following vulnerability has been resolved: net: sched: Disallow replacing of child qdisc from one parent to another Lion Ackermann was able to create a UAF which can be abused for privilege escalation with the following script Step 1. create root qdisc tc qdisc add dev lo...

CVE-2025-21693

In the Linux kernel, the following vulnerability has been resolved: mm: zswap: properly synchronize freeing resources during CPU hotunplug In zswapcompress and zswapdecompress, the per-CPU acompctx of the current CPU at the beginning of the operation is retrieved and used throughout. However, sin...

CVE-2025-21693

In the Linux kernel, the following vulnerability has been resolved: mm: zswap: properly synchronize freeing resources during CPU hotunplug In zswapcompress and zswapdecompress, the per-CPU acompctx of the current CPU at the beginning of the operation is retrieved and used throughout. However, sin...

CVE-2025-21693

In the Linux kernel CVE-2025-21693, the zswap path could UAF resources if the original per-CPU acomp_ctx is still in use when a CPU hotplug occurs, because preemption/migration isn’t disabled during the operation. The defect affects mm/zswap: the code retrieves acomp_ctx on the current CPU at ope...

CVE-2025-21693 mm: zswap: properly synchronize freeing resources during CPU hotunplug

In the Linux kernel, the following vulnerability has been resolved: mm: zswap: properly synchronize freeing resources during CPU hotunplug In zswapcompress and zswapdecompress, the per-CPU acompctx of the current CPU at the beginning of the operation is retrieved and used throughout. However, sin...

CVE-2025-21693 mm: zswap: properly synchronize freeing resources during CPU hotunplug

In the Linux kernel, the following vulnerability has been resolved: mm: zswap: properly synchronize freeing resources during CPU hotunplug In zswapcompress and zswapdecompress, the per-CPU acompctx of the current CPU at the beginning of the operation is retrieved and used throughout. However, sin...

CVE-2025-21693

In the Linux kernel, the following vulnerability has been resolved: mm: zswap: properly synchronize freeing resources during CPU hotunplug In zswapcompress and zswapdecompress, the per-CPU acompctx of the current CPU at the beginning of the operation is retrieved and used throughout. However, sin...

Azure Linux 3.0 Security Update: kernel (CVE-2024-36971)

The version of kernel installed on the remote Azure Linux 3.0 host is prior to tested version. It is, therefore, affected by a vulnerability as referenced in the CVE-2024-36971 advisory. - In the Linux kernel, the following vulnerability has been resolved: net: fix dstnegativeadvice race...