CVE-2024-53099

In the Linux kernel, the following vulnerability has been resolved: bpf: Check validity of link-type in bpflinkshowfdinfo If a newly-added link type doesn't invoke BPFLINKTYPE, accessing bpflinktypestrslink-type may result in an out-of-bounds access. To spot such missed invocations early in the...

CVE-2024-50253

In the Linux kernel, the following vulnerability has been resolved: bpf: Check the validity of nrwords in bpfiterbitsnew Check the validity of nrwords in bpfiterbitsnew. Without this check, when multiplication overflow occurs for nrbits e.g., when nrwords = 0x0400-0001, nrbits becomes 64, stack...

CVE-2024-50254 bpf: Free dynamically allocated bits in bpf_iter_bits_destroy()

In the Linux kernel, the following vulnerability has been resolved: bpf: Free dynamically allocated bits in bpfiterbitsdestroy bpfiterbitsdestroy uses "kit-nrbits kmemleakalloc+0x4b/0x80 kmallocnodenoprof+0x480/0x5c0 alloc.isra.0+0x89/0xb0 allocbulk+0x2af/0x720 prefillmemcache+0x7f/0xb0...

CVE-2024-50253

CVE-2024-50253 affects the Linux kernel’s BPF interpreter, specifically the bpf_iter_bits_new() path in kernel/bpf/helpers.c. The root cause is an overflow in nr_words that can cause stack corruption via bpf_probe_read_kernel_common() when nr_bits overflows (e.g., nr_words = 0x0400-0001). The doc...

CVE-2024-50253 bpf: Check the validity of nr_words in bpf_iter_bits_new()

In the Linux kernel, the following vulnerability has been resolved: bpf: Check the validity of nrwords in bpfiterbitsnew Check the validity of nrwords in bpfiterbitsnew. Without this check, when multiplication overflow occurs for nrbits e.g., when nrwords = 0x0400-0001, nrbits becomes 64, stack...

CVE-2024-50162

In the Linux kernel, the following vulnerability has been resolved: bpf: devmap: provide rxq after redirect rxq contains a pointer to the device from where the redirect happened. Currently, the BPF program that was executed after a redirect via BPFMAPTYPEDEVMAP does not have it set. This is...

CVE-2024-50165

CVE-2024-50165 is a Linux kernel vulnerability in the bpf_parse_param path (kernel/bpf/inode.c) where param->string was not preserved after parsing mount options, leading to a memory leak in kmem. The 8-byte leak and related stack traces were observed in kmemleak/memdup_user usage. The issue h...

CVE-2024-50138 bpf: Use raw_spinlock_t in ringbuf

In the Linux kernel, the following vulnerability has been resolved: bpf: Use rawspinlockt in ringbuf The function bpfringbufreserve is invoked from a tracepoint, which disables preemption. Using spinlockt in this context can lead to a "sleep in atomic" warning in the RT variant. This issue is...

CVE-2023-52920 bpf: support non-r10 register spill/fill to/from stack in precision tracking

In the Linux kernel, the following vulnerability has been resolved: bpf: support non-r10 register spill/fill to/from stack in precision tracking Use instruction jump history to record instructions that performed register spill/fill to/from stack, regardless if this was done through read-only r10...

AZL-52913 CVE-2024-49888 affecting package kernel 5.15.200.1-1

In the Linux kernel, the following vulnerability has been resolved: bpf: Fix a sdiv overflow issue Zac Ecob reported a problem where a bpf program may cause kernel crash due to the following error: Oops: divide error: 0000 1 PREEMPT SMP KASAN PTI The failure is due to the below signed divide:...

CVE-2024-47702

In the Linux kernel, the following vulnerability has been resolved: bpf: Fail verification for sign-extension of packet data/dataend/datameta syzbot reported a kernel crash due to commit 1f1e864b6555 "bpf: Handle sign-extenstin ctx member accesses". The reason is due to sign-extension of 32-bit...

CVE-2024-49861

In the Linux kernel, the following vulnerability has been resolved: bpf: Fix helper writes to read-only maps Lonial found an issue that despite user- and BPF-side frozen BPF map like in case of .rodata, it was still possible to write into it from a BPF program side through specific helpers having...

CVE-2024-49861 bpf: Fix helper writes to read-only maps

In the Linux kernel, the following vulnerability has been resolved: bpf: Fix helper writes to read-only maps Lonial found an issue that despite user- and BPF-side frozen BPF map like in case of .rodata, it was still possible to write into it from a BPF program side through specific helpers having...

CVE-2024-49850 bpf: correctly handle malformed BPF_CORE_TYPE_ID_LOCAL relos

In the Linux kernel, the following vulnerability has been resolved: bpf: correctly handle malformed BPFCORETYPEIDLOCAL relos In case of malformed relocation record of kind BPFCORETYPEIDLOCAL referencing a non-existing BTF type, function bpfcorecalcreloinsn would cause a null pointer deference. Fi...

CVE-2024-47702

In the Linux kernel, the following vulnerability has been resolved: bpf: Fail verification for sign-extension of packet data/dataend/datameta syzbot reported a kernel crash due to commit 1f1e864b6555 "bpf: Handle sign-extenstin ctx member accesses". The reason is due to sign-extension of 32-bit...

CVE-2024-45020

In the Linux kernel, the following vulnerability has been resolved: bpf: Fix a kernel verifier crash in stacksafe Daniel Hodges reported a kernel verifier crash when playing with sched-ext. Further investigation shows that the crash is due to invalid memory access in stacksafe. More specifically,...

CVE-2024-45020 bpf: Fix a kernel verifier crash in stacksafe()

In the Linux kernel, the following vulnerability has been resolved: bpf: Fix a kernel verifier crash in stacksafe Daniel Hodges reported a kernel verifier crash when playing with sched-ext. Further investigation shows that the crash is due to invalid memory access in stacksafe. More specifically,...

CVE-2022-48939

In the Linux kernel, the following vulnerability has been resolved: bpf: Add schedule points in batch ops syzbot reported various soft lockups caused by bpf batch operations. INFO: task kworker/1:1:27 blocked for more than 140 seconds. INFO: task hung in rcubarrier Nothing prevents batch ops to...

CVE-2022-48929

In the Linux kernel, the following vulnerability has been resolved: bpf: Fix crash due to out of bounds access into reg2btfids. When commit e6ac2450d6de "bpf: Support bpf program calling kernel function" added kfunc support, it defined reg2btfids as a cheap way to translate the verifier reg type ...

CVE-2022-48940

In the Linux kernel, the following vulnerability has been resolved: bpf: Fix crash due to incorrect copymapvalue When both bpfspinlock and bpftimer are present in a BPF map value, copymapvalue needs to skirt both objects when copying a value into and out of the map. However, the current code does...