readykernel-patch-15.2-2.8-1.vl7

A use after free vulnerability was found in the kernel's socket recvmmsg subsystem. It may allow remote attackers to corrupt memory and may also allow execution of arbitrary code.

Linux kernel built with the 802.1Q/802.1ad VLAN(CONFIG_VLAN_8021Q) OR Virtual eXtensible Local Area Network(CONFIG_VXLAN) with Transparent Ethernet Bridging(TEB) GRO support is vulnerable to a stack overflow issue. It could occur while receiving large packets via GRO path, as an unlimited recursion could happen in both VLAN and TEB modules, leading to a stack corruption in the kernel.

A race condition was found in the way the Linux kernel's memory subsystem handled the copy-on-write (COW) breakage of private read-only memory mappings. An unprivileged local user could use this flaw to gain write access to otherwise read-only memory mappings and thus increase their privileges on the system.

virtio-net: tx stall due to failed allocations of large skbs.

An attempt to move page mapped by AIO ring buffer to the other node triggers NULL pointer dereference at trace_writeback_dirty_page(), because aio_fs_backing_dev_info.dev is 0.

A security flaw was found in the Linux kernel in the mark_source_chains() function in "net/ipv4/netfilter/ip_tables.c". It is possible for a user-supplied "ipt_entry" structure to have a large "next_offset" field. This field is not bounds checked prior to writing to a counter value at the supplied offset. Patches: http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=54d83fc74aa9ec72794373cb47432c5f7fb1a309 http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=f24e230d257af1ad7476c6e81a8dc3127a74204e

A flaw was found in the implementation of overlayfs in the Linux kernel. An attacker can make the system leak resources by opening a large file for writing on an overlay filesystem that does not have enough space to handle writing of such amounts of data. Patch: http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=ab79efab0a0ba01a74df782eb7fa44b044dae8b5

A use after free vulnerability was found in tcp_xmit_retransmit_queue and other tcp_* functions. Patch: https://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=bb1fceca22492109be12640d49f5ea5a544c6bb4

Race condition in the audit_log_single_execve_arg function in the Linux kernel allows local users to bypass intended character-set restrictions or disrupt audit of the system calls. Patch: https://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=43761473c254b45883a64441dd0bc85a42f3645c

ext4: mfsync() was broken.

ext4: fsync() for dirs/symlink was broken.

Container start and stop operations took too long when many network namespaces were created and destroyed.

Page allocator: freed memory pages could be accessed in the error paths.

MAC filter was silently disabled for the containers in some cases.

A flaw was found in the implementation of the Linux kernel's handling of networking challenge ack where an attacker is able to determine the shared counter which could be used to determine sequence numbers for TCP stream injection. Patch: https://git.kernel.org/cgit/linux/kernel/git/davem/net.git/commit/?id=75ff39ccc1bd5d3c455b6822ab09e533c551f758

A flaw was found in the Linux kernel's keyring handling code. An uninitialized variable in key_reject_and_link() function could lead to a system crash or a use-after-free. Patch: http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=38327424b40bcebe2de92d07312c89360ac9229a

A NULL pointer dereference flaw was found in the way the Linux kernel's network subsystem handled socket creation with an invalid protocol identifier. A local user could use this flaw to crash the system. Patch: https://git.kernel.org/cgit/linux/kernel/git/davem/net.git/commit/?id=79462ad02e861803b3840cc782248c7359451cd9