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

In the Linux kernel, the following vulnerability has been resolved: sctp: Set skstate back to CLOSED if autobind fails in sctplistenstart. In sctplistenstart, called by sctpinetlisten, it should set skstate back to CLOSED if sctpautobind fails for any reason. Otherwise, the next time sctpinetlist...

Astra Linux – Vulnerability found in Linux 5.15, Linux 6.1

In the Linux kernel, the following vulnerabilities have been resolved: net: Missing check for virtio Two missing checks in virtionethdrtoskb allowed syzbot to crash kernels again. 1. After the skbsegment function, the buffer may become non-linear nrfrags != 0. However, since the SKBTXSHAREDFRAG...

Astra Linux – Vulnerability in haveged

In src/havegecmd.c, the sockethandler function performs a credential check on the abstract UNIX socket \0/sys/entropy/haveged. However, while it detects that the connecting user is not root cred.uid != 0 and prepares a negative acknowledgment ASCIINAK, it fails to stop execution. The code proceed...

Astra Linux – Vulnerability in Linux 6.1

In the Linux kernel, the following vulnerability has been resolved: Bluetooth: SCO: Race conditions in scosockconnect have been fixed. scosockconnect checks skstate and sktype without holding the socket lock. Two concurrent connect system calls on the same socket can both pass the check and enter...

Astra Linux – Vulnerability in Linux

A vulnerability was discovered in the Linux kernel, where the non-blocking socket operation in llcpsockconnect leads to a leak and ultimately causes the system to hang...

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: Bonding: A net pointer to skbflowdissect must be provided. After the code “net: plumb network namespace into skbflowdissect”, we need to provide a net pointer to skbflowdissect, either through skb-dev, skb-sk, or a user-provided...

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

A issue was discovered in l2capsockrelease in net/bluetooth/l2capsock.c in the Linux kernel before version 6.4.10. There is a use-after-free issue, as the children of a sk object are handled incorrectly...

Astra Linux – Vulnerability in Linux 5.10, Linux

In the Linux kernel, the following vulnerability has been resolved: net/tunnel: Wait until all skuserdata readers complete before releasing the sock. There is a race condition in vxlan where, when deleting a vxlan device during packet reception, there is a possibility that the sock is released...

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

In the Linux kernel, the following vulnerability has been resolved: net: added vlangetprotocolanddepth helper. Previously, skbmaypull was used instead of skbheaderpointer in vlangetprotocol and related functions. Few calls relied on skb-head being populated with the MAC header. syzbot detected on...

Astra Linux – Vulnerability in Linux 5.10, Linux

In the Linux kernel, the following vulnerabilities have been resolved: Net: If sock is not available, do not access sock's skwq in skstreamwaitmemory. The following NULL pointer dereferences have also been fixed: ... 14.471200 Call Trace: 14.471562 14.471882 lockacquire+0x245/0x2e0 14.472416 ?...

Astra Linux – Vulnerability in Qemu

A flaw was discovered in QEMU. If the QIOChannelWebsock object is freed while it is waiting to complete a handshake, a GSource is leaked. This can result in the callback being fired later, thereby causing a use-after-free when using the channel. This vulnerability can be exploited by a malicious...

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

In the Linux kernel, the following vulnerability has been resolved: xfrm: esp: avoid in-place decrypt on shared skb frags The MSGSPLICEPAGES function can attach pages from a pipe directly to an skb. TCP marks such skbs with SKBFLSHAREDFRAG after skbsplicefromiter, so later processes that may modi...

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: llc: Do not use skbget before devqueuexmit. The syzbot exploit can cause hosts to crash, especially when using llc and devices that do not support IFFTXSKBSHARING. In this case, the e1000 driver calls ethskbpad, where the skb is...

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

In the Linux kernel, the following vulnerabilities have been resolved: - In net: The variable sk-skfamily was read once in the function skmcloop. - syzbot is frequently using IPV6ADDRFORM; it managed to trigger the WARNONONCE1 function in skmcloop. We still have many more similar issues that need...

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

In the Linux kernel, the following vulnerability has been resolved: Wifi: ath9k – Avoid referencing uninitialized memory in ath9kwmictrlrx. For the same reasons described in commit b383e8abed41 “Wifi: ath9k – Avoid uninitialized memory reading in ath9khtcrxmsg”, ath9khtcrxmsg should validate the...

Astra Linux – Vulnerability in Linux 5.15

In the Linux kernel, the following vulnerabilities have been resolved: net: fixed a refcount bug in skpsockget2. Syzkaller reported the refcount bug as follows: ------------ cut here ------------ refcountt: saturated; memory was leaking. WARNING: CPU: 1 PID: 3605 at lib/refcount.c:19...

Astra Linux – Vulnerabilities in Linux 5.10, Linux 5.15

In the Linux kernel, the following vulnerabilities have been resolved: kcm: An annotate data-race around kcm-rxpsock has been fixed. kcm-rxpsock can now be read without a lock in kcmrfree. The read and write operations have been adjusted accordingly. The same approach is used for kcm-rxwait in th...

Astra Linux – Vulnerability in Linux 5.10, Linux

In the Linux kernel, the following vulnerability has been resolved: Staging: gdm724x: fixed the use of a variable after it is freed in gdmlterx. The netifrxni function frees the skb, so we cannot dereference it to save the skb-len...

Astra Linux – Vulnerability found in Linux 6.1, Linux 5.15

In the Linux kernel, the following vulnerability has been resolved: gro: fixed ownership transfer If packets are processed with a fraglist, they may be segmented later on and continue their journey within the stack. In skbSegmentlist, these skbs can be reused as is. This is a problem because thei...

Astra Linux – Vulnerability found in Linux 6.1, Linux 5.15

In the Linux kernel, the following vulnerability has been resolved: afunix: Clearing stale u-oobskb. Syzkaller began reporting a deadlock of unixgclock after the commit 4090fa373f0. However, this only reveals the bug that had been present since the commit 314001f0bf92 “afunix: Adding OOB support”...