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 – Vulnerability in Linux 5.10

In the Linux kernel, the following vulnerability has been resolved: dm: fixed a use-after-free in dmcleanupzoneddev dmcleanupzoneddev uses a queue, so it must be called before blkcleanupdisk starts its execution: blkcleanupdisk-blkcleanupqueue-kobjectput-blkreleasequeue-...

Astra Linux – Vulnerability in Linux 5.10

In the Linux kernel, the following vulnerability has been resolved: futex: Fixed a race condition between futexkeytonodeopt and vmareplacepolicy During the execution of futexkeytonodeopt, vma-vmpolicy is read under the speculative mmap lock and RCU. Concurrently, mbind may call vmareplacepolicy,...

Astra Linux – Vulnerability in Linux 6.1

In the Linux kernel, the following vulnerability has been resolved: LoongArch: Disable IRQs before initfn for non-boot CPUs. Disable IRQs before initfn for non-boot CPUs during hotplug operations, in order to silence such warnings and also to avoid potential errors due to unexpected interrupts...

Astra Linux – Vulnerability in Linux 5.10

In the Linux kernel, the following vulnerabilities have been resolved: ipv6: A retry logic was added in net6rtnotify. inet6rtnotify can only be called under RCU protection. This means that the route may be changed concurrently, and rt6fillnode might return -EMSGSIZE. The skb should be resized whe...

Astra Linux – Vulnerability found in Linux 5.10, Linux 6.1

In the Linux kernel, the following vulnerability has been resolved: dm: Do not attempt to queue IO under RCU protection. The dm function looks up the table for IO based on the request type. It assumes that if the request is marked as REQNOWAIT, it’s safe to attempt to submit that IO while under t...

Astra Linux – Vulnerability found in Linux 5.15, Linux 5.10

In the Linux kernel, the following vulnerability has been resolved: rcu: Avoid stack overflow due to rcuirqenterchecktick being kprobed. Registering a kprobe for rcuirqenterchecktick can cause a kernel stack overflow, as shown below. This issue can be reproduced by enabling CONFIGNOHZFULL and...

Astra Linux – Vulnerability in Linux 5.10

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 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 5.10

In the Linux kernel, the following vulnerability has been resolved: skmsg: The allocskmsg function can be called from a non-sleepable context. The skpsockverdictrecv function uses rcureadlock protection. We need the callers to pass a gfpt argument to avoid issues. The report from syzbot stated:...

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

In the Linux kernel, the following vulnerabilities have been resolved: BPF: Check rcureadlockTraceheld before calling BPF map helpers. These three BPFmaplookup,update,deleteelem helpers are also available for sleepable BPF programs. Therefore, add the corresponding lock assertion for sleepable BP...

Astra Linux – Vulnerability in Linux 5.10

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 in Linux, Linux 5.10

In the Linux kernel, the following vulnerability has been resolved: RCU: Fixed the lockdep warning in thiscpuread in rcuforcequiescentstate. Running rcutorture with a non-zero fqsduration module parameter in a kernel built with CONFIGPREEMPTION=y results in the following error: BUG: Using...

Astra Linux – Vulnerability in Linux 5.10

In the Linux kernel, the following vulnerability has been resolved: rcu-tasks: Fixed an issue where the non-existent percpu rtpcp variable was accessed in rcutasksneedgpcb. For kernels built with CONFIGFORCENRCPUS=y, nrcpuids is defined as NRCPUS instead of the number of possible CPUs. This can...

Astra Linux – Vulnerability in Linux 5.10

In the Linux kernel, the following vulnerabilities have been resolved: ksmbd: Fixed issues with use-after-free and NULL dereferencing in smbgrantoplock. smbgrantoplock has two issues in the oplock publication sequence: 1 opinfo is linked into ci-moplist via opinfoadd before addleasegloballist is...

Astra Linux – Vulnerability in Linux 5.10

In the Linux kernel, the following vulnerability has been resolved: Networks: DSA: Avoid suspicious RCU usage for synced VLAN-aware MAC addresses When using the felix driver the only one that supports UC filtering and MC filtering as a DSA master for a randomly selected DSA switch, the following...

Astra Linux – Vulnerability in Linux 5.10

In the Linux kernel, the following vulnerability has been resolved: ksmbd: The use-after-free issue in smblazyparentleasebreakclose has been fixed. The opinfo pointer, which is obtained through rcudereferencefp-fopinfo, is accessed after rcureadunlock has been called. This creates a race conditio...

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: mac802154: fixed the issue where key resources were released in mac802154llseckeydel. The mac802154llseckeydel function can free resources associated with a key directly, without following the RCU rules for waiting before the...

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: ICMP: Prevent possible NULL dereferencing from icmpbuildprobe. The first issue involves a double call to indevgetrcu; the second call might return NULL. if indevgetrcudev && indevgetrcudev-ifalist The second issue involves...