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: atm: fixed the use after free in lecsend The -send operation frees the skb object; therefore, the length of the object should be saved before calling -send to avoid a use after free situation...

Astra Linux – Vulnerability found in Linux 6.1, Linux 5.15

In the Linux kernel, the following vulnerabilities have been resolved: espintcp: fixed skb leaks. Several error paths now include a kfreeskb...

Astra Linux – Vulnerability in Linux 6.1

In the Linux kernel, the following vulnerability has been resolved: net: fix udp gsoskbSegment after pulling from fragList The commit a1e40ac5b5e9 “net: gso: fix udp gso fragList segmentation after pulling from fragList” detected invalid geometries in the fragList skbSegments and redirected them...

Astra Linux – Vulnerability in Linux 6.1

In the Linux kernel, the following vulnerability has been resolved: vsock/virtio: The length of the packet header is validated before calling skbPut. When receiving a vsock packet in the guest, only the size of the virtqueue buffer is validated prior to calling virtiovsockskbrxPut. Unfortunately,...

Astra Linux – Vulnerability in Linux 5.10, Linux

In the Linux kernel, the following vulnerability has been resolved: bpf: make sure skb-len != 0 when redirecting to a tunneling device syzkaller managed to trigger another case where skb-len == 0 when we enter devqueuexmit: WARNING: CPU: 0 PID: 2470 at include/linux/skbuff.h:2576 skbassertlen...

Astra Linux – Vulnerability in Linux 5.10, Linux

In the Linux kernel, the following vulnerability has been resolved: skbuff: Account for tail adjustment during pull operations Extending the tail of a data structure may have some unexpected side effects if a program uses a helper function like BPFFUNCskbpulldata to read partial content beyond th...

Astra Linux – Vulnerability found in Linux 5.10, Linux 5.15

In the Linux kernel, the following vulnerability has been resolved: net: qrtr: A bug in accessing the uninit variable was fixed in qrtrtxresume. Syzbot reported the bug as follows: ===================================================== Bug: KMSAN: Access to the uninitvalue variable in...

Astra Linux – Vulnerability in Linux

In the Linux kernel, the following vulnerability has been resolved: net:emac/emac-mac: A use-after-free issue was addressed in emacmactxbufsend. In emacmactxbufsend, it calls emactxfilltpd.., skb,... If an error occurs in emactxfilltpd, the skb will be freed via devkfreeskbskb in the error branch...

Astra Linux – Vulnerability in Linux

In the Linux kernel, the following vulnerability has been resolved: net: lltemac: Ensure that the skb is freed when it is completely used. By using the TX BD to track the skb pointer, we can efficiently free the skb buffer after the frame has been transmitted. However, to avoid freeing the skb...

Astra Linux – Vulnerability in Linux

In the Linux kernel, the following vulnerability has been resolved: net: cdceem: Fix for the “tx fixupskb leak” issue. When usbnet transmit sends a skb, it is handled in eemtxfixup. If skbcopyexpand fails, it returns NULL. In this case, usbnetstartxmit has no chance to free the original skb. The...

Astra Linux – Vulnerability in Linux, Linux 5.10

In the Linux kernel, the following vulnerability has been resolved: net: netlink: afnetlink: Added a check on the len parameter to prevent empty skb objects. This prevents a division error in the netemenqueue function, which occurs when skb-len=0 and skb-datalen=0 during the randomized corruption...

Astra Linux – Vulnerability in Linux, Linux 5.10

In the Linux kernel, the following vulnerability has been resolved: net: amd-xgbe: Fixed an issue with the data length underflow in SKB structures. A BUGON will be triggered in the include/linux/skbuff.h file, resulting in intermittent kernel panics when a data length underflow is detected. This...

Astra Linux – Vulnerability in Linux, Linux 5.10

In the Linux kernel, the following vulnerability has been resolved: net: ieee802154: at86rf230: Stop leaking the skb structures. Upon an error, the ieee802154xmitcomplete helper function is not called. Only ieee802154wakequeue is called manually. In the Tx phase, the skb structure is leaked. Leas...

Astra Linux – Vulnerability in Linux, Linux 5.10

In the Linux kernel, the following vulnerability has been resolved: Networking layer: Fixed a memory leak that occurred when uncloning an skb dst and its associated metadata. When uncloning an skb dst and its associated metadata, a new dst+metadata is allocated and later replaces the old one in t...

Astra Linux – Vulnerability in Linux 6.1

In the Linux kernel, the following vulnerability has been resolved: net: mctp: It now takes ownership of the skb in mctplocaloutput. Currently, mctplocaloutput only takes ownership of the skb on a successful operation. In some cases where mctplocaloutput fails, we might leak the skb. Ownership of...

Astra Linux – Vulnerability in Linux 5.10, Linux

In the Linux kernel, the following vulnerability has been resolved: Ethernet: Aeroflex – Fix for a potential skb leak in grethinitrings The grethinitrings function does not free the newly allocated skb when dmamappingerror returns an error. Therefore, adding devkfreeskb is necessary to fix this...

Astra Linux – Vulnerability in Linux 5.10

In the Linux kernel, the following vulnerability has been resolved: tipc: re-fetching the skb context after calling tipcmsgvalidate As shown in the call trace, the original skb was freed during the execution of tipcmsgvalidate. Dereferencing the old skb context would cause a “use-after-free” cras...

Astra Linux – Vulnerability in Linux 5.10

In the Linux kernel, the following vulnerability has been resolved: e100: A potential use of memory after freeing it has been fixed in e100xmitprepare. In e100xmitprepare, if we cannot map the skb, then -ENOMEM is returned. As a result, e100xmitframe will return NETDEVTXBUSY, and the upper layer...

Astra Linux – Vulnerability in Linux 5.10

In the Linux kernel, the following vulnerabilities have been resolved: nfc: fdp: Fixed a potential memory leak in fdpncisend. The fdpncisend function calls fdpncii2cwrite, which does not free the skb object after its execution. As a result, when fdpncii2cwrite is completed, the skb object will...

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

Transmitted requests in Xen’s virtual network protocol can consist of multiple parts. Although none of them are actually useful, except for the initial part, any of these parts can be of zero length, meaning they carry no data at all. Apart from the certain initial portion of the data to be...