CVE-2023-52761 riscv: VMAP_STACK overflow detection thread-safe

In the Linux kernel, the following vulnerability has been resolved: riscv: VMAPSTACK overflow detection thread-safe commit 31da94c25aea "riscv: add VMAPSTACK overflow detection" added support for CONFIGVMAPSTACK. If overflow is detected, CPU switches to shadowstack temporarily before switching...

CVE-2023-52761

In the Linux kernel, the following vulnerability has been resolved: riscv: VMAPSTACK overflow detection thread-safe commit 31da94c25aea "riscv: add VMAPSTACK overflow detection" added support for CONFIGVMAPSTACK. If overflow is detected, CPU switches to shadowstack temporarily before switching...

CVE-2023-52761 riscv: VMAP_STACK overflow detection thread-safe

In the Linux kernel, the following vulnerability has been resolved: riscv: VMAPSTACK overflow detection thread-safe commit 31da94c25aea "riscv: add VMAPSTACK overflow detection" added support for CONFIGVMAPSTACK. If overflow is detected, CPU switches to shadowstack temporarily before switching...

kernel: kernel: Denial of Service via memory leak in LRU hash maps

A flaw was found in the Linux kernel. A local user could exploit a memory leak vulnerability in the Least Recently Used LRU and LRUPERCPU hash maps. This occurs when the kernel allocates a new element during a map update but fails to release it if the hash table bucket cannot be locked. Repeated...

kernel: bpf, cpumap: Make sure kthread is running before map update returns

A race condition was found in the Linux kernel's BPF cpumap implementation in the kthread lifecycle management. A local user can trigger this issue by running XDP redirect operations when the per-CPU kthread is stopped prematurely before processing queued frames, causing the cleanup code to find ...

SUSE CVE-2022-48642

In the Linux kernel, the following vulnerability has been resolved: netfilter: nftables: fix percpu memory leak at nftablesaddchain It seems to me that percpu memory for chain stats started leaking since commit 3bc158f8d0330f0a "netfilter: nftables: map basechain priority to hardware priority" wh...

CVE-2024-26690

In the Linux kernel, the following vulnerability has been resolved: net: stmmac: protect updates of 64-bit statistics counters As explained by a comment in , write side of struct u64statssync must ensure mutual exclusion, or one seqcount update could be lost on 32-bit platforms, thus blocking...

UBUNTU-CVE-2024-26690

In the Linux kernel, the following vulnerability has been resolved: net: stmmac: protect updates of 64-bit statistics counters As explained by a comment in , write side of struct u64statssync must ensure mutual exclusion, or one seqcount update could be lost on 32-bit platforms, thus blocking...

CVE-2024-26690

In CVE-2024-26690, the Linux kernel stmmac driver fix avoids 32-bit seqcount race conditions in u64_stats_sync by splitting 64-bit statistics into three context-specific groups and introducing a per-cpu stats structure (stmmac_pcpu_stats). The tx, napi/poll, and interrupt contexts now update disj...

CVE-2024-26690 net: stmmac: protect updates of 64-bit statistics counters

In the Linux kernel, the following vulnerability has been resolved: net: stmmac: protect updates of 64-bit statistics counters As explained by a comment in , write side of struct u64statssync must ensure mutual exclusion, or one seqcount update could be lost on 32-bit platforms, thus blocking...

CVE-2024-26690 net: stmmac: protect updates of 64-bit statistics counters

In the Linux kernel, the following vulnerability has been resolved: net: stmmac: protect updates of 64-bit statistics counters As explained by a comment in , write side of struct u64statssync must ensure mutual exclusion, or one seqcount update could be lost on 32-bit platforms, thus blocking...

kernel: x86/mm: Randomize per-cpu entry area

A possible unauthorized memory access flaw was found in the Linux kernel cpuentryarea mapping of X86 CPU data to memory, where a user may guess the location of exception stacks or other important data. This issue could allow a local user to gain access to some important data with expected locatio...

DEBIAN-CVE-2021-46977

In the Linux kernel, the following vulnerability has been resolved: KVM: VMX: Disable preemption when probing user return MSRs Disable preemption when probing a user return MSR via RDSMR/WRMSR. If the MSR holds a different value per logical CPU, the WRMSR could corrupt the host's value if KVM is...

UBUNTU-CVE-2021-46977

In the Linux kernel, the following vulnerability has been resolved: KVM: VMX: Disable preemption when probing user return MSRs Disable preemption when probing a user return MSR via RDSMR/WRMSR. If the MSR holds a different value per logical CPU, the WRMSR could corrupt the host's value if KVM is...

Linux kernel security vulnerabilities

Linux kernel is the kernel used by Linux, the open source operating system of the Linux Foundation in the United States. A security vulnerability exists in the Linux kernel that stems from the debugging code of kmaplocal doubling the number of per-CPU repair mapping slots allocated to kmaplocal s...

kernel: x86/mm: Randomize per-cpu entry area

A possible unauthorized memory access flaw was found in the Linux kernel cpuentryarea mapping of X86 CPU data to memory, where a user may guess the location of exception stacks or other important data. This issue could allow a local user to gain access to some important data with expected locatio...

kernel: nfsd: move init of percpu reply_cache_stats counters back to nfsd_init_net

A flaw was identified in the NFS server nfsd implementation in the Linux kernel where the initialization of the per-CPU replycachestats counters was relocated incorrectly in the code path. This change can lead to use of uninitialized per-CPU statistical counters during NFS request handling when t...

kernel: tcp: tcp_make_synack() can be called from process context

In the Linux kernel, the following vulnerability has been resolved: tcp: tcpmakesynack can be called from process context tcprtxsynack now could be called in process context as explained in 0a375c822497 "tcp: tcprtxsynack can be called from process context". tcprtxsynack might call tcpmakesynack,...

Kernel: x86/mm: a per-cpu entry area leak was identified through the init_cea_offsets function when prefetchnta and prefetcht2 instructions being used for the per-cpu entry area mapping to the user space

A possible unauthorized memory access flaw was found in the Linux kernel's cpuentryarea mapping of X86 CPU data to memory, where a user may guess the location of exception stacks or other important data. Based on the previous CVE-2023-0597, the 'Randomize per-cpu entry area' feature was implement...

CLSA-2023-1698307021 Fix of 7 CVEs

CVE-2023-0597 // CVE-url: https://ubuntu.com/security/CVE-2023-0597 - x86/kasan: Map shadow for percpu pages on demand - x86/mm: Recompute physical address for every page of per-CPU CEA mapping - x86/mm: Populate KASAN shadow for entire per-CPU range of CPU entry area - x86/mm: Do not shuffle CPU...