In the Linux kernel, the following vulnerability has been resolved: net/sched: Only allow act_ct to bind to clsact/ingress qdiscs and shared blocks As Paolo said earlier [1]: "Since the blamed commit below, classify can return TC_ACT_CONSUMED while the current skb being held by the defragmentation engine. As reported by GangMin Kim, if such packet is that may cause a UaF when the defrag engine later on tries to tuch again such packet." act_ct was never meant to be used in the egress path, however some users are attaching it to egress today [2]. Attempting to reach a middle ground, we noticed that, while most qdiscs are not handling TC_ACT_CONSUMED, clsact/ingress qdiscs are. With that in mind, we address the issue by only allowing act_ct to bind to clsact/ingress qdiscs and shared blocks. That way it's still possible to attach act_ct to egress (albeit only with clsact). [1] https://lore.kernel.org/netdev/674b8cbfc385c6f37fb29a1de08d8fe5c2b0fbee.1771321118.git.pabeni@redhat.com/...

In the Linux kernel, the following vulnerability has been resolved: nfsd: fix heap overflow in NFSv4.0 LOCK replay cache The NFSv4.0 replay cache uses a fixed 112-byte inline buffer (rp_ibuf[NFSD4_REPLAY_ISIZE]) to store encoded operation responses. This size was calculated based on OPEN responses and does not account for LOCK denied responses, which include the conflicting lock owner as a variable-length field up to 1024 bytes (NFS4_OPAQUE_LIMIT). When a LOCK operation is denied due to a conflict with an existing lock that has a large owner, nfsd4_encode_operation() copies the full encoded response into the undersized replay buffer via read_bytes_from_xdr_buf() with no bounds check. This results in a slab-out-of-bounds write of up to 944 bytes past the end of the buffer, corrupting adjacent heap memory. This can be triggered remotely by an unauthenticated attacker with two cooperating NFSv4.0 clients: one sets a lock with a large owner string, then the other requests a conflict...

Уязвимость компонента NFSv4.0 ядра операционной системы Linux, позволяющая нарушителю вызвать отказ в обслуживании

Уязвимость kernel-lt

Security update for the Linux Kernel (Live Patch 80 for SUSE Linux Enterprise 12 SP5)

Security update for the Linux Kernel (Live Patch 79 for SUSE Linux Enterprise 12 SP5)

Security update for the Linux Kernel (Live Patch 71 for SUSE Linux Enterprise 12 SP5)

Security update for the Linux Kernel (Live Patch 70 for SUSE Linux Enterprise 12 SP5)

Security update for the Linux Kernel (Live Patch 69 for SUSE Linux Enterprise 12 SP5)

Security update for the Linux Kernel (Live Patch 24 for SUSE Linux Enterprise 15 SP6)

Security update for the Linux Kernel (Live Patch 44 for SUSE Linux Enterprise 15 SP4)

Security update for the Linux Kernel (Live Patch 38 for SUSE Linux Enterprise 15 SP5)

Security update for the Linux Kernel (Live Patch 14 for SUSE Linux Enterprise 15 SP7)

Security update for the Linux Kernel (Live Patch 30 for SUSE Linux Enterprise 15 SP5)

Security update for the Linux Kernel (Live Patch 26 for SUSE Linux Enterprise 15 SP5)

Security update for the Linux Kernel (Live Patch 23 for SUSE Linux Enterprise 15 SP6)

Security update for the Linux Kernel (Live Patch 11 for SUSE Linux Enterprise 15 SP7)

Security update for the Linux Kernel (Live Patch 47 for SUSE Linux Enterprise 15 SP4)

Security update for the Linux Kernel RT (Live Patch 11 for SUSE Linux Enterprise 15 SP7)

Security update for the Linux Kernel (Live Patch 46 for SUSE Linux Enterprise 15 SP4)