Astra Linux – Vulnerability in Linux 5.10

In the Linux kernel, the following vulnerabilities have been resolved: net/sched: fqpie: prevent dismantle issue For some reason, the fqpieDestroy function did not copy the working code from pieDestroy and other related functions, resulting in a persistent bug. Before calling...

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...

Astra Linux – Vulnerability found in Linux 5.15, Linux 5.10

In the Linux kernel, the following vulnerabilities have been resolved: - dm cache: Fixed UAF in the destroy function. - Dmcache also has the same UAF issue when dmresume and dmdestroy are executed concurrently. Therefore, the timer is canceled again in the destroy function...

Astra Linux – Vulnerability in Linux, Linux 5.10

In the Linux kernel, the following vulnerability has been resolved: net/sched: schtaprio: properly canceled the timer from tapriodestroy There is a comment in qdisccreate regarding the fact that we do not call ops-reset in some cases. errout4: “Any broken qdiscs that would require an ops-reset...

Astra Linux – Vulnerability in Linux, Linux 5.10

In the Linux kernel, the following vulnerability has been resolved: atm: iphase: fixed a possible use-after-free in iamoduleexit The remove function of this module calls deltimer. However, that function does not wait for the timer handler to finish. This means that the timer handler may still be...

Astra Linux – Vulnerability in Linux, Linux 5.10

In the Linux kernel, the following vulnerability has been resolved: mac80211-hwsim: fixed the handling of late hrtimer events. Thomas explained in https://lore.kernel.org/r/87mtoeb4hb.ffs@tglx that our current handling of hrtimer is incorrect. If the timer fires late—for example, due to vCPU...

Astra Linux – Vulnerability in Linux, Linux 5.10

In the Linux kernel, the following vulnerability has been resolved: Watchdog: sc520wdt: A possible use-after-free occurred in wdtturnoff. The remove method of this module calls deltimer. However, that function does not wait for the timer handler to complete. This means that the timer handler may...

Astra Linux – Vulnerability in Linux, Linux 5.10

In the Linux kernel, the following vulnerability has been resolved: Watchdog: Fixed a possible use-after-free in wdtstartup. The remove path of this module calls deltimer. However, that function does not wait until the timer handler finishes. This means that the timer handler may still be running...

Astra Linux – Vulnerability in Linux, Linux 5.15

In the Linux kernel, the following vulnerability has been resolved: “sh: push-switch: Reorder cleanup operations to avoid use-after-free bug” The original code placed “flushwork” before “timershutdownsync” in “switchdrvremove”. Although we use “flushwork” to stop the worker, it could be reschedul...

Astra Linux – Vulnerabilities in Linux 5.10, Linux 5.15

In the Linux kernel, the following vulnerability has been resolved: scsi: libsas: Fixed a use-after-free bug in smpexecutetasksg When executing an SMP task fails, the smpexecutetasksg function calls deltimer to delete the “slowtask-timer” timer. However, if the timer handler sastaskinternaltimedo...

Astra Linux – Vulnerabilities in Linux 5.10, Linux 5.15

In the Linux kernel, the following vulnerability has been resolved: drivers: staging: rtl8192e: Fixed a deadlock in rtllibbeaconsstop. There is a deadlock in rtllibbeaconsstop, as shown below: Thread 1 | Thread 2 | rtllibsendbeacon rtllibbeaconsstop | modtimer spinlockirqsave //1 | Wait for a whi...

Astra Linux – Vulnerabilities in Linux 5.10, Linux 5.15

In the Linux kernel, the following vulnerability has been resolved: drivers: staging: rtl8192u: Fixed a deadlock in ieee80211beaconsstop. There is a deadlock in ieee80211beaconsstop, as shown below: Thread 1 | Thread 2 | ieee80211sendbeacon ieee80211beaconsstop | modtimer spinlockirqsave //1 | Wa...

Astra Linux – Vulnerabilities in Linux 5.10, Linux 5.15

In the Linux kernel, the following vulnerabilities have been resolved: rxrpc: A race condition in rxrpcexitnet has been fixed. The current code may lead to the following race conditions: CPU0 vs. CPU1 c rxrpcexitnet rxrpcpeerkeepaliveworker if rxnet-live rxnet-live = false;...

Astra Linux – Vulnerabilities in Linux 5.10, Linux 5.15

In the Linux kernel, the following vulnerability has been resolved: nfc: nci: added flushworkqueue to prevent UAF. Our detector identified a bug caused by concurrent use-after-free when detaching a NCI device. The main reason for this bug is the unexpected scheduling between the delayed mechanism...

Astra Linux – Vulnerability in Linux 5.10

In the Linux kernel, the following vulnerability has been resolved: net/mlx5: Use deltimersync instead of deltimer in the fw reset flow of the halting poll. Replace deltimer with deltimersync in the fw reset polling activation flow. This prevents a race condition that occurs when deltimer is call...

Astra Linux – Vulnerabilities in Linux, Linux-5.10, Linux-5.15, Linux-6.1

In the Linux kernel, the following vulnerability has been resolved: serial: 8250port: Check IRQ data before use If the leaf driver wishes to use IRQ polling irq = 0, and the IIR register indicates that an interrupt occurred in the 8250 hardware, the IRQ data can be NULL. In such cases, we need to...

Astra Linux – Vulnerabilities in Linux, Linux-5.15, Linux-6.1

In the Linux kernel, the following vulnerability has been resolved: um: time-travel: fix time corruption In the “basic” time-travel mode without =inf-cpu or =ext, we still encounter timer interrupts. These can occur at arbitrary times, for example, while inside the timerread function, which simpl...

Astra Linux – Vulnerability found in Linux 5.10, Linux 5.15

In the Linux kernel, the following vulnerability has been resolved: tty: serial: fsllpuart: fixed a race condition during RX DMA shutdown. From time to time, DMA completion can occur mid-way through the DMA shutdown process: : lpuart32shutdown lpuartdmashutdown deltimersync lpuartdmarxcomplete...

Astra Linux – Vulnerability in Linux 5.15

A use-after-free vulnerability was discovered in the cyttsp4core driver within the Linux kernel. This issue arises in the device cleanup routine, due to a possible rearming of the watchdogtimer from the workqueue. This could allow a local user to crash the system, resulting in a denial of service...

Astra Linux – Vulnerability in Linux 5.10

In the Linux kernel, the following vulnerability has been resolved: ALSA: seq: Fixed a division by zero in initializetimer. The ALSA timer SNDUTIMER, which is controlled by the user space, allows an unprivileged user to set the hardware resolution of the sndtimer to an arbitrary 64-bit value via...