kernel: tcp: defer shutdown(SEND_SHUTDOWN) for TCP_SYN_RECV sockets

In the Linux kernel, the following vulnerability has been resolved: tcp: defer shutdownSENDSHUTDOWN for TCPSYNRECV sockets TCPSYNRECV state is really special, it is only used by cross-syn connections, mostly used by fuzzers. In the following crash 1, syzbot managed to trigger a divide by zero in...

kernel: inet: read sk->sk_family once in inet_recv_error()

In the Linux kernel, the following vulnerability has been resolved: inet: read sk-skfamily once in inetrecverror inetrecverror is called without holding the socket lock. IPv6 socket could mutate to IPv4 with IPV6ADDRFORM socket option and trigger a KCSAN warning...

kernel: Bluetooth: ISO: Check socket flag instead of hcon

In the Linux kernel, the following vulnerability has been resolved: Bluetooth: ISO: Check socket flag instead of hcon This fixes the following Smatch static checker warning: net/bluetooth/iso.c:1364 isosockrecvmsg error: we previously assumed 'pi-conn-hcon' could be null line 1359...

kernel: atl1c: Work around the DMA RX overflow issue

In the Linux kernel, the following vulnerability has been resolved: atl1c: Work around the DMA RX overflow issue This is based on alx driver commit 881d0327db37 "net: alx: Work around the DMA RX overflow issue". The alx and atl1c drivers had RX overflow error which was why a custom allocator was...

kernel: net/iucv: fix use after free in iucv_sock_close()

A possible use-after-free vulnerability was found in the Linux kernel in iucvsockclose. This issue may lead to a crash or memory corruption...

kernel: can: j1939: Fix UAF in j1939_sk_match_filter during setsockopt(SO_J1939_FILTER)

In the Linux kernel, the following vulnerability has been resolved: can: j1939: Fix UAF in j1939skmatchfilter during setsockoptSOJ1939FILTER Lock jsk-sk to prevent UAF when setsockopt..., SOJ1939FILTER, ... modifies jsk-filters while receiving packets. Following trace was seen on affected system:...

kernel: net: usb: lan78xx: Limit packet length to skb->len

In the Linux kernel, the following vulnerability has been resolved: net: usb: lan78xx: Limit packet length to skb-len Packet length retrieved from descriptor may be larger than the actual socket buffer length. In such case the cloned skb passed up the network stack will leak kernel memory content...

kernel: geneve: make sure to pull inner header in geneve_rx()

In the Linux kernel, the following vulnerability has been resolved: geneve: make sure to pull inner header in geneverx syzbot triggered a bug in geneverx 1 Issue is similar to the one I fixed in commit 8d975c15c0cd "ip6tunnel: make sure to pull inner header in ip6tnlrcv" We have to save...

kernel: tls: get psock ref after taking rxlock to avoid leak

In the Linux kernel, the following vulnerability has been resolved: tls: get psock ref after taking rxlock to avoid leak At the start of tlsswrecvmsg, we take a reference on the psock, and then call tlsrxreaderlock. If that fails, we return directly without releasing the reference. Instead of...

kernel: erspan: make sure erspan_base_hdr is present in skb->head

In the Linux kernel, the following vulnerability has been resolved: erspan: make sure erspanbasehdr is present in skb-head The Linux kernel CVE team has assigned CVE-2024-35888 to this issue. Upstream advisory: https://lore.kernel.org/linux-cve-announce/2024051947-CVE-2024-35888-1e04@gregkh/T...

kernel: inet: inet_defrag: prevent sk release while still in use

In the Linux kernel, the following vulnerability has been resolved: inet: inetdefrag: prevent sk release while still in use iplocalout and other functions can pass skb-sk as function argument. If the skb is a fragment and reassembly happens before such function call returns, the sk must not be...

libvirt: Crash of virtinterfaced via virConnectListInterfaces()

A flaw was found in libvirt. A refactor of the code fetching the list of interfaces for multiple APIs introduced a corner case on platforms where allocating 0 bytes of memory results in a NULL pointer. This corner case would lead to a NULL-pointer dereference and subsequent crash of virtinterface...

PT-2025-18832

Name of the Vulnerable Software and Affected Versions Linux kernel affected versions not specified Description A issue in the Linux kernel has been identified where the packet length retrieved from a descriptor may be larger than the actual socket buffer length, leading to a leak of kernel memory...

Denial Of Service (DoS)

Waitress is vulnerable to Denial Of Service DoS. The vulnerability is due to a race condition where, if a remote client closes the connection before Waitress calls getpeername, allows an attacker to trigger a busy-loop in the server, causing it to repeatedly attempt writing to a non-existent sock...

CVE-2024-50260 sock_map: fix a NULL pointer dereference in sock_map_link_update_prog()

In the Linux kernel, the following vulnerability has been resolved: sockmap: fix a NULL pointer dereference in sockmaplinkupdateprog The following race condition could trigger a NULL pointer dereference: sockmaplinkdetach: sockmaplinkupdateprog: mutexlock&sockmapmutex; ... sockmaplink-map = NULL;...

sock_map: Add a cond_resched() in sock_hash_free()

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tcp: check skb is non-NULL in tcp_rto_delta_us()

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netfilter: nft_socket: fix sk refcount leaks

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netfilter: br_netfilter: fix panic with metadata_dst skb

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SUSE CVE-2024-50186

In the Linux kernel, the following vulnerability has been resolved: net: explicitly clear the sk pointer, when pf-create fails We have recently noticed the exact same KASAN splat as in commit 6cd4a78d962b "net: do not leave a dangling sk pointer, when socket creation fails". The problem is that...