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

In the Linux kernel, the following vulnerabilities have been resolved: netfilter: nfnetlinkqueue: acquire rcureadlock in instanceDestroyrcu syzbot reported that nfreinject could be called without rcureadlock: WARNING: suspicious RCU usage 6.9.0-rc7-syzkaller-02060-g5c1672705a1a 0 Not tainted...

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

In the Linux kernel, the following vulnerability has been resolved: rcuscale: Move rcuscalewriter’s scheduletimeoutuninterruptible function to idle. The rcuscale.holdoff module parameter can be used to delay the start of rcuscalewriter’s kthread. However, the hung-task timeout will trigger when t...

Astra Linux – Vulnerability in Linux 6.1

In the Linux kernel, the following vulnerability has been resolved: mptcp: fixed the “scheduling while atomic” issue in mptcppmnl.AppendNewLocalAddr. If multiple connection requests attempt to create an implicit mptcp endpoint simultaneously, more than one caller may end up using...

Astra Linux – Vulnerability in Linux 6.1

In the Linux kernel, the following vulnerability has been resolved: In OpenVSwitch, the defertunnelnetdevput function is delayed until the RCU callback is executed. The ovsnetdevtunnelDestroy function may be executed after NETDEVUNREGISTER has already detached the device. Dropping the reference t...

Astra Linux – Vulnerability in Linux 6.1

In the Linux kernel, the following vulnerability has been resolved: mptcp: The issue related to “slab-use-after-free” in inetlookupestablished has been fixed. The lookups in the ehash table are performed without locking, and they rely on SLABTYPESAFEBYRCU to ensure the stability of socket memory...

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

In the Linux kernel, the following vulnerabilities have been resolved: mptcp: fixed a race condition in mptcppmdeladdtimer The mptcppmdeladdtimer function can call skstoptimersyncsk, &entry-addtimer. It is reported that there might already be a free entry, as reported by syzbot. Added RCU...

Astra Linux – Vulnerability in Linux, Linux 5.10

In the Linux kernel, the following vulnerabilities have been resolved: SCTP: Use callrcu to free endpoints This patch delays the endpoint freeing process by calling callrcu, in order to address another use-after-free issue in sctpsockdump: BUG: KASAN: Use-after-free in lockacquire+0x36d9/0x4c20...

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

In the Linux kernel, the following vulnerability has been resolved: ipv6: fixed a possible Use-after-Allocation UAF in ip6finishoutput2. If skbexpandhead returns NULL, the skb is freed, and the associated dst/idev may also be freed. We need to hold the rcureadlock to ensure that the dst and...

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

In the Linux kernel, the following vulnerability has been resolved: padata: fixed UAF in padatareorder A bug was found when running the ltp test: BUG: KASAN: slab-use-after-free in padatafindnext+0x29/0x1a0 A read of size 4 at addr ffff88bbfe003524 was performed by task kworker/u113:2/3039206 CPU...

Astra Linux – Vulnerability found in Linux 5.15, Linux 6.1

In the Linux kernel, the following vulnerabilities have been resolved: bpf: Fixed a race condition between bpftimercancelandfree and bpftimercancel. This race condition could lead to a UAF Use-After-Free error involving the timer-timer variable. Here’s the detailed explanation: In bpftimer...

Astra Linux – Vulnerability in Linux 5.10

In the Linux kernel, the following vulnerability has been resolved: rxrpc: Fixed the issue where the timer for starting a call race against the destruction of the call occurred. The rxrpccall structure contains a timer used to handle various timed events related to a call. This timer can be...

Astra Linux – Vulnerability in Linux 5.10, Linux

In the Linux kernel, the following vulnerability has been resolved: kprobes: Do not call disarmkprobe for disabled kprobes The assumption in disablekprobe is incorrect, and it may attempt to disarm a kprobe that is already disarmed, thereby triggering WARNONCE below. This issue can be easily...

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

In the Linux kernel, the following vulnerability has been resolved: net:sched: Fix for use-after-free in tapriochange In tapriochange, the admin pointer may become dangling due to the sched switch/removal caused by advancesched. The critical section protected by q-currententrylock is too small to...

Astra Linux – Vulnerability in Linux 6.1

In the Linux kernel, the following vulnerability has been resolved: ipv6: preventing infinite loops in rt6nlmsgsize During testing of the previous patch, I was able to trigger an infinite loop in rt6nlmsgsize at the following location: listforeachentryrcusibling, &f6i-fib6siblings, fib6siblings...

Astra Linux – Vulnerability found in Linux 6.1, Linux 5.15

In the Linux kernel, the following vulnerability has been resolved: ipv4: Use RCU protection in iprtupdatepmtu. iprtupdatepmtu must use RCU protection to ensure that the network structure it reads does not disappear...

Astra Linux – Vulnerability found in Linux 5.10, Linux 6.1

In the Linux kernel, the following vulnerabilities have been resolved: atm: lec: fixed a use-after-free in sockdefreadable There is a race condition between lecatmclose, which sets priv-lecd to NULL, and concurrent access to priv-lecd in sendtolecd, lechandlebridge, and lecatmsend. When the socke...

Astra Linux – Vulnerability in Linux 5.15

In the Linux kernel, the following vulnerabilities have been resolved: mt76: Fixed a use-after-free by removing a non-RCU wcid pointer. This fix addresses an issue detected by KASAN regarding use-after-free in mt76txqschedule. This was done by protecting mtxq-wcid with rculock between...

Astra Linux – Vulnerability found in Linux 5.10, Linux 5.15

In the Linux kernel, the following vulnerability has been resolved: rcu/rcuscale: The kfreescalethread threads is stopped after unloading the rcuscale module. Running the ‘kfreercutest’ test case results in a fatal error. The root cause is that the kfreescalethread threads continues to run after...

Astra Linux – Vulnerability in Linux 5.15

In the Linux kernel, the following vulnerabilities have been resolved: rcutorture: Fixed the issue where ksoftirqd’s timing and iteration were increased. The RCU priority boosting can fail in two situations: 1 If nrcpus maxcpus, meaning that the total number of CPUs is greater than the number of...

Astra Linux – Vulnerability in Linux 6.1

In the Linux kernel, the following vulnerability has been resolved: dm: don't attempt to queue IO under RCU protection dm looks up the table for IO based on the request type, with an assumption that if the request is marked REQNOWAIT, it's fine to attempt to submit that IO while under RCU read lo...