Race condition

In the Linux kernel, the following vulnerability has been resolved: bpf: Fix a race condition between btfput and mapfree When running ./testprogs -j in my local vm with latest kernel, I once hit a kasan error like below: 1887.184724 BUG: KASAN: slab-use-after-free in bpfrbrootfree+0x1f8/0x2b0...

CVE-2024-26591

In the Linux kernel, the following vulnerability has been resolved: bpf: Fix re-attachment branch in bpftracingprogattach The following case can cause a crash due to missing attachbtf: 1 load rawtp program 2 load fentry program with rawtp as targetfd 3 create tracing link for fentry program with...

CVE-2023-52447

In the Linux kernel, the following vulnerability has been resolved: bpf: Defer the free of inner map when necessary When updating or deleting an inner map in map array or map htab, the map may still be accessed by non-sleepable program or sleepable program. However bpfmapfdputptr decreases the...

CVE-2023-52452

In the Linux kernel, the following vulnerability has been resolved: bpf: Fix accesses to uninit stack slots Privileged programs are supposed to be able to read uninitialized stack memory ever since 6715df8d5 but, before this patch, these accesses were permitted inconsistently. In particular,...

Design/Logic Flaw

In the Linux kernel, the following vulnerability has been resolved: bpf: Fix accesses to uninit stack slots Privileged programs are supposed to be able to read uninitialized stack memory ever since 6715df8d5 but, before this patch, these accesses were permitted inconsistently. In particular,...

UBUNTU-CVE-2023-52446

In the Linux kernel, the following vulnerability has been resolved: bpf: Fix a race condition between btfput and mapfree When running ./testprogs -j in my local vm with latest kernel, I once hit a kasan error like below: 1887.184724 BUG: KASAN: slab-use-after-free in bpfrbrootfree+0x1f8/0x2b0...

UBUNTU-CVE-2024-26589

In the Linux kernel, the following vulnerability has been resolved: bpf: Reject variable offset alu on PTRTOFLOWKEYS For PTRTOFLOWKEYS, checkflowkeysaccess only uses fixed off for validation. However, variable offset ptr alu is not prohibited for this ptr kind. So the variable offset is not...

Design/Logic Flaw

In the Linux kernel, the following vulnerability has been resolved: bpf: Reject variable offset alu on PTRTOFLOWKEYS For PTRTOFLOWKEYS, checkflowkeysaccess only uses fixed off for validation. However, variable offset ptr alu is not prohibited for this ptr kind. So the variable offset is not...

UBUNTU-CVE-2023-52452

In the Linux kernel, the following vulnerability has been resolved: bpf: Fix accesses to uninit stack slots Privileged programs are supposed to be able to read uninitialized stack memory ever since 6715df8d5 but, before this patch, these accesses were permitted inconsistently. In particular,...

UBUNTU-CVE-2024-26588

In the Linux kernel, the following vulnerability has been resolved: LoongArch: BPF: Prevent out-of-bounds memory access The testtag test triggers an unhandled page fault: ./testtag 130.640218 CPU 0 Unable to handle kernel paging request at virtual address ffff80001b898004, era == 9000000003137f7c...

CVE-2023-52452 bpf: Fix accesses to uninit stack slots

In the Linux kernel, the following vulnerability has been resolved: bpf: Fix accesses to uninit stack slots Privileged programs are supposed to be able to read uninitialized stack memory ever since 6715df8d5 but, before this patch, these accesses were permitted inconsistently. In particular,...

CVE-2024-26591 bpf: Fix re-attachment branch in bpf_tracing_prog_attach

In the Linux kernel, the following vulnerability has been resolved: bpf: Fix re-attachment branch in bpftracingprogattach The following case can cause a crash due to missing attachbtf: 1 load rawtp program 2 load fentry program with rawtp as targetfd 3 create tracing link for fentry program with...

CVE-2024-26591

CVE-2024-26591: Linux kernel vulnerability in bpf_tracing_prog_attach can crash with NULL pointer dereference due to missing attach_btf when attaching tracing programs (rawtp/fentry chain). The issue arises in a sequence of loading a rawtp program, loading an fentry with rawtp as target, creating...

CVE-2023-52452 bpf: Fix accesses to uninit stack slots

In the Linux kernel, the following vulnerability has been resolved: bpf: Fix accesses to uninit stack slots Privileged programs are supposed to be able to read uninitialized stack memory ever since 6715df8d5 but, before this patch, these accesses were permitted inconsistently. In particular,...

CVE-2023-52452

CVE-2023-52452 affects the Linux kernel’s BPF verifier and stack handling. The issue allowed privileged programs to read uninitialized stack memory inconsistently, particularly for accesses near state->allocated_stack when growing the stack was required. The patch fixes these accesses in check...

CVE-2024-26591 bpf: Fix re-attachment branch in bpf_tracing_prog_attach

In the Linux kernel, the following vulnerability has been resolved: bpf: Fix re-attachment branch in bpftracingprogattach The following case can cause a crash due to missing attachbtf: 1 load rawtp program 2 load fentry program with rawtp as targetfd 3 create tracing link for fentry program with...

CVE-2024-26591

In the Linux kernel, the following vulnerability has been resolved: bpf: Fix re-attachment branch in bpftracingprogattach The following case can cause a crash due to missing attachbtf: 1 load rawtp program 2 load fentry program with rawtp as targetfd 3 create tracing link for fentry program with...

CVE-2023-52447 bpf: Defer the free of inner map when necessary

In the Linux kernel, the following vulnerability has been resolved: bpf: Defer the free of inner map when necessary When updating or deleting an inner map in map array or map htab, the map may still be accessed by non-sleepable program or sleepable program. However bpfmapfdputptr decreases the...

CVE-2023-52447 bpf: Defer the free of inner map when necessary

In the Linux kernel, the following vulnerability has been resolved: bpf: Defer the free of inner map when necessary When updating or deleting an inner map in map array or map htab, the map may still be accessed by non-sleepable program or sleepable program. However bpfmapfdputptr decreases the...

CVE-2023-52447

CVE-2023-52447 is a Linux kernel issue where deferral of freeing inner BPF maps could lead to use-after-free if an inner map is accessed after removal from the outer map. The fix defers the inner-map free via bpf_map_free_deferred() and enforces two RCUs (RCU grace period and task-RCU grace perio...