CVE-2022-50219

In CVE-2022-50219, the issue is in the Linux kernel’s BPF subsystem. Syzbot reported a use-after-free in compute_effective_progs when detaching BPF links, where a freed memory path could be dereferenced by update_effective_progs() leading to a KASAN UAF. The fix removes the pointer from the cgrou...

CVE-2022-50168

In the Linux kernel, the following vulnerability has been resolved: bpf, x86: fix freeing of not-finalized bpfprogpack syzbot reported a few issues with bpfprogpack 1, 2. This only happens with multiple subprogs. In jitsubprogs, we first call bpfintjitcompile on each sub program. And then, we cal...

CVE-2022-50168 bpf, x86: fix freeing of not-finalized bpf_prog_pack

In the Linux kernel, the following vulnerability has been resolved: bpf, x86: fix freeing of not-finalized bpfprogpack syzbot reported a few issues with bpfprogpack 1, 2. This only happens with multiple subprogs. In jitsubprogs, we first call bpfintjitcompile on each sub program. And then, we cal...

CVE-2022-50167

In the Linux kernel, the following vulnerability has been resolved: bpf: fix potential 32-bit overflow when accessing ARRAY map element If BPF array map is bigger than 4GB, element pointer calculation can overflow because both index and elemsize are u32. Fix this everywhere by forcing 64-bit...

CVE-2022-50167 bpf: fix potential 32-bit overflow when accessing ARRAY map element

In the Linux kernel, the following vulnerability has been resolved: bpf: fix potential 32-bit overflow when accessing ARRAY map element If BPF array map is bigger than 4GB, element pointer calculation can overflow because both index and elemsize are u32. Fix this everywhere by forcing 64-bit...

CVE-2022-50167 bpf: fix potential 32-bit overflow when accessing ARRAY map element

In the Linux kernel, the following vulnerability has been resolved: bpf: fix potential 32-bit overflow when accessing ARRAY map element If BPF array map is bigger than 4GB, element pointer calculation can overflow because both index and elemsize are u32. Fix this everywhere by forcing 64-bit...

CVE-2022-50167

Technical details for CVE-2022-50167 are not publicly available in the provided documents. The advisories list the CVE but do not specify affected products, root cause, or fixes. Monitor for official disclosures and updates.

CVE-2022-50069

In the Linux kernel, the following vulnerability has been resolved: BPF: Fix potential bad pointer dereference in bpfsysbpf The bpfsysbpf helper function allows an eBPF program to load another eBPF program from within the kernel. In this case the argument union bpfattr pointer as well as the insn...

CVE-2022-49985

In the Linux kernel, the following vulnerability has been resolved: bpf: Don't use tnumrange on array range checking for poke descriptors Hsin-Wei reported a KASAN splat triggered by their BPF runtime fuzzer which is based on a customized syzkaller: BUG: KASAN: slab-out-of-bounds in...

CVE-2022-49985

The CVE-2022-49985 entry concerns the Linux kernel, where the BPF component allowed a range check descriptor to misrepresent a tight range because tnum_range(0, map->max_entries-1) may yield a superset of the intended values. The root cause is that the tnum-based range representation can erron...

CVE-2022-49985 bpf: Don't use tnum_range on array range checking for poke descriptors

In the Linux kernel, the following vulnerability has been resolved: bpf: Don't use tnumrange on array range checking for poke descriptors Hsin-Wei reported a KASAN splat triggered by their BPF runtime fuzzer which is based on a customized syzkaller: BUG: KASAN: slab-out-of-bounds in...

CVE-2022-49985 bpf: Don't use tnum_range on array range checking for poke descriptors

In the Linux kernel, the following vulnerability has been resolved: bpf: Don't use tnumrange on array range checking for poke descriptors Hsin-Wei reported a KASAN splat triggered by their BPF runtime fuzzer which is based on a customized syzkaller: BUG: KASAN: slab-out-of-bounds in...

CVE-2022-49975 bpf: Don't redirect packets with invalid pkt_len

In the Linux kernel, the following vulnerability has been resolved: bpf: Don't redirect packets with invalid pktlen Syzbot found an issue 1: fqcodeldrop try to drop a flow whitout any skbs, that is, the flow-head is null. The root cause, as the 2 says, is because that bpfprogtestrunskb run a bpf...

CVE-2022-49975

CVE-2022-49975 affects the Linux kernel’s BPF path, where a redirect of packets with invalid pkt_len could occur. The root cause is described as a BPF program test/run path (bpf_prog_test_run_skb) redirecting empty skbs, leading to a potential flow handling issue in fq_codel_drop(). The vulnerabi...

CVE-2022-49970

CVE-2022-49970 concerns a Linux kernel vulnerability in the bpf/cgroup path, where an invalid opcode triggers a kernel BUG during purge_effective_progs when detaching BPF programs from nested cgroups. Reproduction steps described in multiple sources involve attaching prog2 to cg2, prog1 to cg1, w...

CVE-2022-49970 bpf, cgroup: Fix kernel BUG in purge_effective_progs

In the Linux kernel, the following vulnerability has been resolved: bpf, cgroup: Fix kernel BUG in purgeeffectiveprogs Syzkaller reported a triggered kernel BUG as follows: ------------ cut here ------------ kernel BUG at kernel/bpf/cgroup.c:925! invalid opcode: 0000 1 PREEMPT SMP NOPTI CPU: 1 PI...

CVE-2022-49970

In the Linux kernel, the following vulnerability has been resolved: bpf, cgroup: Fix kernel BUG in purgeeffectiveprogs Syzkaller reported a triggered kernel BUG as follows: ------------ cut here ------------ kernel BUG at kernel/bpf/cgroup.c:925! invalid opcode: 0000 1 PREEMPT SMP NOPTI CPU: 1 PI...

CVE-2022-49970 bpf, cgroup: Fix kernel BUG in purge_effective_progs

In the Linux kernel, the following vulnerability has been resolved: bpf, cgroup: Fix kernel BUG in purgeeffectiveprogs Syzkaller reported a triggered kernel BUG as follows: ------------ cut here ------------ kernel BUG at kernel/bpf/cgroup.c:925! invalid opcode: 0000 1 PREEMPT SMP NOPTI CPU: 1 PI...

CVE-2022-49967 bpf: Fix a data-race around bpf_jit_limit.

In the Linux kernel, the following vulnerability has been resolved: bpf: Fix a data-race around bpfjitlimit. While reading bpfjitlimit, it can be changed concurrently via sysctl, WRITEONCE in doprocdoulongvecminmax. The size of bpfjitlimit is long, so we need to add a paired READONCE to avoid...

CVE-2022-49967

In the Linux kernel, the following vulnerability has been resolved: bpf: Fix a data-race around bpfjitlimit. While reading bpfjitlimit, it can be changed concurrently via sysctl, WRITEONCE in doprocdoulongvecminmax. The size of bpfjitlimit is long, so we need to add a paired READONCE to avoid...