Astra Linux – Vulnerability in Linux 5.10

In the Linux kernel, the following vulnerability has been resolved: net: cpsw: Executing the ndosetrxmode callback within a work queue Commit 1767bb2d47b7 “ipv6: mcast: Do not hold RTNL for IPV6ADDMEMBERSHIP and MCASTJOINGROUP” removed the RTNL lock for these operations. However, this change...

Astra Linux – Vulnerability in Linux 5.10

In the Linux kernel, the following vulnerability has been resolved: netfilter: nftpayload: Incorrect arithmetic operations when fetching VLAN header bits. If the offset plus the length exceeds the range of the Ethernet + VLAN header, then the length is adjusted to copy the bytes that are within t...

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

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 found in Linux 5.10, Linux 6.1, Linux, Linux 5.15

In the Linux kernel, the following vulnerabilities have been resolved: geneve: Fixed header validation in geneve6xmitskb. syzbot is able to trigger an uninit-value in genevexmit. Problem: While most IP tunnel helpers such as iptunnelgetdsfield use skbprotocolskb, true, pskbinetmaypull only uses...

Astra Linux – Vulnerability found in Linux 5.10, Linux 5.15

In the Linux kernel, the following vulnerabilities have been resolved: vlan: Fixed a memory leak in vlannewlink. The responsible commit added back a bug that I fixed in commit 9bbd917e0bec “vlan: fixed a memory leak in vlandevsetegresspriority”. If a memory allocation fails in vlanchangelink afte...

Astra Linux – Vulnerability in Linux 5.10

In the Linux kernel, the following vulnerability has been resolved: Bridge: switchdev: Fixed memory leaks when changing the VLAN protocol The bridge driver can offload VLANs to the underlying hardware either via switchdev or the 8021q driver. When the former is used, the VLAN is marked in the...

Astra Linux – Vulnerability in Linux 5.10

In the Linux kernel, the following vulnerability has been resolved: net: dsa: felix: suppress non-changes to the tagging protocol The way that dsatreechangetagproto works is as follows: When dsatreenotify fails, it does not know whether the operation failed midway through a multi-switch tree, or ...

Astra Linux – Vulnerability in Linux 5.10

In the Linux kernel, the following vulnerabilities have been resolved: Bridge: Protection against NULL vlan groups was added in the bridge function for local VLAN-0 FDB helpers. When the CONFIGBRIDGEVLANFILTERING configuration option is not set, the brvlangroup and nbpvlangroup functions return...

Astra Linux – Vulnerability in Linux 5.10

In the Linux kernel, the following vulnerability has been resolved: net: stmmac: fix tc flower deletion for VLAN priority Rx steering To replicate the issue: 1 Add a tc flower filter for VLAN Priority-based frame steering: $ IFDEVNAME=eth0 $ tc qdisc add dev $IFDEVNAME ingress $ tc qdisc add dev...

Astra Linux – Vulnerability in Linux, Linux 5.10

In the Linux kernel, the following vulnerability has been resolved: net: vlan: fixed an underflow issue related to the realdev refcnt. An error is injected before devholdrealdev in registervlandev, and the following testcase is executed: bash ip link add dev dummy1 type dummy ip link add name...

Astra Linux – Vulnerability in Linux 5.10

In the Linux kernel, the following vulnerability has been resolved: net: bridge: vlan: A memory leak has been fixed in allowedingress. When per-vlan state is used, if vlan snooping and stats are disabled, untagged or priority-tagged ingress frames will go through the pvid state check. If the port...

Astra Linux – Vulnerability in Linux 5.10

In the Linux kernel, the following vulnerabilities have been resolved: mac80211: Fixed an error in the ieee80211chanbwchange function for APVLAN stations. The ieee80211chanbwchange function iterates through all stations and accesses link-reserved.oper via sta-sdata-linklinkid. For stations on...

Astra Linux – Vulnerability found in Linux 5.10, Linux 6.1

In the Linux kernel, the following vulnerabilities have been resolved: net: dsa: ocelot: The function dsatag8021qunregister is called under rtnllock when removing a driver. When the currently used tagging protocol is “ocelot-8021q”, and we unbind the driver, we encounter this error: bash $ echo...

Astra Linux – Vulnerability in Linux

In the Linux kernel, the following vulnerability has been resolved: net: dsa: mt7530: Fix VLAN traffic leaks The PCRMATRIX field was set to all 1’s when VLAN filtering is enabled, but it wasn’t reset when VLAN filtering was disabled. This could lead to traffic leaks: ip link add br0 type bridge...

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: batman-adv: Avoid infinite loops when trying to resize the local TT. If the MTU of one of the attached interfaces becomes too small to transmit the local translation table, then it must be resized to fit within all fragments when...

Astra Linux – Vulnerability in Linux 5.10

In the Linux kernel, the following vulnerabilities have been resolved: net/smc: Fixed NULL pointer dereferencing in smcvlanbytcpsk. Coverity reports a possible NULL dereferencing issue: - In smcvlanbytcpsk: - 6. returnednull: netdevlowergetnext returns NULL checked 29 out of 30 times. - 7...

Astra Linux – Vulnerability in Linux 5.10

In the Linux kernel, the following vulnerabilities have been resolved: mac80211: Fixed a deadlock issue in AP/VLAN handling. Syzbot reports that when APVLAN interfaces are active, closing the AP interface they belong to can lead to a deadlock. This isn’t surprising—since we use devclose to handle...

Moderate: Red Hat Security Advisory: kernel security update

An update for kernel is now available for Red Hat Enterprise Linux 9. Red Hat Product Security has rated this update as having a security impact of Moderate. A Common Vulnerability Scoring System CVSS base score, which gives a detailed severity rating, is available for each vulnerability from the...

kernel: net: vlan: fix VLAN 0 refcount imbalance of toggling filtering during runtime

In the Linux kernel, the following vulnerability has been resolved: net: vlan: fix VLAN 0 refcount imbalance of toggling filtering during runtime Assuming the "rx-vlan-filter" feature is enabled on a net device, the 8021q module will automatically add or remove VLAN 0 when the net device is put...

kernel: net: vlan: fix VLAN 0 refcount imbalance of toggling filtering during runtime

In the Linux kernel, the following vulnerability has been resolved: net: vlan: fix VLAN 0 refcount imbalance of toggling filtering during runtime Assuming the "rx-vlan-filter" feature is enabled on a net device, the 8021q module will automatically add or remove VLAN 0 when the net device is put...