Linux Kernel Security Vulnerabilities

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 the Linux kernel that stems from not properly handling queue freezing and limiting the locking order, which could lead to a deadlock...

CVE-2025-21767: Improper Locking

In the Linux kernel, the following vulnerability has been resolved: clocksource: Use migratedisable to avoid calling getrandomu32 in atomic context The following bug report happened with a PREEMPTRT kernel: BUG: sleeping function called from invalid context at kernel/locking/spinlockrt.c:48...

CVE-2025-21820: Improper Locking

In the Linux kernel, the following vulnerability has been resolved: tty: xilinxuartps: split sysrq handling lockdep detects the following circular locking dependency: CPU 0 CPU 1 ========================== ============================ cdnsuartisr printk uartportlockport consolelock...

CVE-2024-57994: Improper Locking

In the Linux kernel, the following vulnerability has been resolved: ptrring: do not block hard interrupts in ptrringresizemultiple Jakub added a lockdepassertnohardirq check in pagepoolputpage to increase test coverage. syzbot found a splat caused by hard irq blocking in ptrringresizemultiple 1 A...

CVE-2022-49662

In the Linux kernel, the following vulnerability has been resolved: ipv6: fix lockdep splat in in6dumpaddrs As reported by syzbot, we should not use rcudereference when rcureadlock is not held. WARNING: suspicious RCU usage 5.19.0-rc2-syzkaller 0 Not tainted net/ipv6/addrconf.c:5175 suspicious...

CVE-2022-49669

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-2022-49607

In the Linux kernel, the following vulnerability has been resolved: perf/core: Fix data race between perfeventsetoutput and perfmmapclose Yang Jihing reported a race between perfeventsetoutput and perfmmapclose: CPU1 CPU2 perfmmapclosee2 if atomicdecandtest&e2-rb-mmapcount // 1 - 0 detachrest =...

DEBIAN-CVE-2022-49584

In the Linux kernel, the following vulnerability has been resolved: ixgbe: Add locking to prevent panic when setting sriovnumvfs to zero It is possible to disable VFs while the PF driver is processing requests from the VF driver. This can result in a panic. BUG: unable to handle kernel paging...

CVE-2022-49584

In the Linux kernel, the following vulnerability has been resolved: ixgbe: Add locking to prevent panic when setting sriovnumvfs to zero It is possible to disable VFs while the PF driver is processing requests from the VF driver. This can result in a panic. BUG: unable to handle kernel paging...

CVE-2022-49547

In the Linux kernel, the following vulnerability has been resolved: btrfs: fix deadlock between concurrent dio writes when low on free data space When reserving data space for a direct IO write we can end up deadlocking if we have multiple tasks attempting a write to the same file range, there ar...

CVE-2022-49441

In the Linux kernel, the following vulnerability has been resolved: tty: fix deadlock caused by calling printk under ttyport-lock ptywrite invokes kmalloc which may invoke a normal printk to print failure message. This can cause a deadlock in the scenario reported by syz-bot below: CPU0 CPU1 CPU2...

CVE-2022-49433

In the Linux kernel, the following vulnerability has been resolved: RDMA/hfi1: Prevent use of lock before it is initialized If there is a failure during probe of hfi1 before the sdmamaplock is initialized, the call to hfi1freedevdata will attempt to use a lock that has not been initialized. If th...

DEBIAN-CVE-2022-49398

In the Linux kernel, the following vulnerability has been resolved: usb: dwc3: gadget: Replace listforeachentrysafe if using giveback The listforeachentrysafe macro saves the current item n and the item after n+1, so that n can be safely removed without corrupting the list. However, when traversi...

UBUNTU-CVE-2022-49584

In the Linux kernel, the following vulnerability has been resolved: ixgbe: Add locking to prevent panic when setting sriovnumvfs to zero It is possible to disable VFs while the PF driver is processing requests from the VF driver. This can result in a panic. BUG: unable to handle kernel paging...

UBUNTU-CVE-2022-49446

In the Linux kernel, the following vulnerability has been resolved: nvdimm: Fix firmware activation deadlock scenarios Lockdep reports the following deadlock scenarios for CXL root device power-management, deviceprepare, operations, and deviceshutdown operations for 'ndregion' devices: Chain exis...

CVE-2022-49584

CVE-2022-49584 is a Linux kernel issue in the ixgbe driver where disabling SR-IOV (setting sriov_numvfs to zero) can race with the PF driver, potentially causing a kernel panic. The root cause is a lack of locking during the disable path, allowing VF mailbox communication to proceed concurrently....

CVE-2022-49443 list: fix a data-race around ep->rdllist

In the Linux kernel, the following vulnerability has been resolved: list: fix a data-race around ep-rdllist eppoll first calls epeventsavailable with no lock held and checks if ep-rdllist is empty by listemptycareful, which reads rdllist-prev. Thus all accesses to it need some protection to avoid...

CVE-2022-49443

CVE-2022-49443 relates to a data race in Linux kernel epoll during epoll_wait, caused by lockless access to ep->rdllist via ep_events_available and list handling. The issue manifests as a KCSAN-detected race between ep_start_scan/ep_send_events and do_epoll_wait, potentially affecting availabi...

CVE-2022-49443

In the Linux kernel, the following vulnerability has been resolved: list: fix a data-race around ep-rdllist eppoll first calls epeventsavailable with no lock held and checks if ep-rdllist is empty by listemptycareful, which reads rdllist-prev. Thus all accesses to it need some protection to avoid...

CVE-2022-49441 tty: fix deadlock caused by calling printk() under tty_port->lock

In the Linux kernel, the following vulnerability has been resolved: tty: fix deadlock caused by calling printk under ttyport-lock ptywrite invokes kmalloc which may invoke a normal printk to print failure message. This can cause a deadlock in the scenario reported by syz-bot below: CPU0 CPU1 CPU2...