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CVE-2022-48923— btrfs: prevent copying too big compressed lzo segment

EPSS 0.03% · P7
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I. Basic Information for CVE-2022-48923

Vulnerability Information
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Vulnerability Title
btrfs: prevent copying too big compressed lzo segment
Source: NVD (National Vulnerability Database)
Vulnerability Description
In the Linux kernel, the following vulnerability has been resolved: btrfs: prevent copying too big compressed lzo segment Compressed length can be corrupted to be a lot larger than memory we have allocated for buffer. This will cause memcpy in copy_compressed_segment to write outside of allocated memory. This mostly results in stuck read syscall but sometimes when using btrfs send can get #GP kernel: general protection fault, probably for non-canonical address 0x841551d5c1000: 0000 [#1] PREEMPT SMP NOPTI kernel: CPU: 17 PID: 264 Comm: kworker/u256:7 Tainted: P OE 5.17.0-rc2-1 #12 kernel: Workqueue: btrfs-endio btrfs_work_helper [btrfs] kernel: RIP: 0010:lzo_decompress_bio (./include/linux/fortify-string.h:225 fs/btrfs/lzo.c:322 fs/btrfs/lzo.c:394) btrfs Code starting with the faulting instruction =========================================== 0:* 48 8b 06 mov (%rsi),%rax <-- trapping instruction 3: 48 8d 79 08 lea 0x8(%rcx),%rdi 7: 48 83 e7 f8 and $0xfffffffffffffff8,%rdi b: 48 89 01 mov %rax,(%rcx) e: 44 89 f0 mov %r14d,%eax 11: 48 8b 54 06 f8 mov -0x8(%rsi,%rax,1),%rdx kernel: RSP: 0018:ffffb110812efd50 EFLAGS: 00010212 kernel: RAX: 0000000000001000 RBX: 000000009ca264c8 RCX: ffff98996e6d8ff8 kernel: RDX: 0000000000000064 RSI: 000841551d5c1000 RDI: ffffffff9500435d kernel: RBP: ffff989a3be856c0 R08: 0000000000000000 R09: 0000000000000000 kernel: R10: 0000000000000000 R11: 0000000000001000 R12: ffff98996e6d8000 kernel: R13: 0000000000000008 R14: 0000000000001000 R15: 000841551d5c1000 kernel: FS: 0000000000000000(0000) GS:ffff98a09d640000(0000) knlGS:0000000000000000 kernel: CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 kernel: CR2: 00001e9f984d9ea8 CR3: 000000014971a000 CR4: 00000000003506e0 kernel: Call Trace: kernel: <TASK> kernel: end_compressed_bio_read (fs/btrfs/compression.c:104 fs/btrfs/compression.c:1363 fs/btrfs/compression.c:323) btrfs kernel: end_workqueue_fn (fs/btrfs/disk-io.c:1923) btrfs kernel: btrfs_work_helper (fs/btrfs/async-thread.c:326) btrfs kernel: process_one_work (./arch/x86/include/asm/jump_label.h:27 ./include/linux/jump_label.h:212 ./include/trace/events/workqueue.h:108 kernel/workqueue.c:2312) kernel: worker_thread (./include/linux/list.h:292 kernel/workqueue.c:2455) kernel: ? process_one_work (kernel/workqueue.c:2397) kernel: kthread (kernel/kthread.c:377) kernel: ? kthread_complete_and_exit (kernel/kthread.c:332) kernel: ret_from_fork (arch/x86/entry/entry_64.S:301) kernel: </TASK>
Source: NVD (National Vulnerability Database)
CVSS Information
N/A
Source: NVD (National Vulnerability Database)
Vulnerability Type
N/A
Source: NVD (National Vulnerability Database)
Vulnerability Title
Linux kernel 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Linux kernel是美国Linux基金会的开源操作系统Linux所使用的内核。 Linux kernel存在安全漏洞，该漏洞源于允许memcpy函数写入超出分配内存的范围。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

VendorProductAffected VersionsCPESubscribe
LinuxLinux a6e66e6f8c1b685e11b778bef614480a9c1a5278 ~ 8df508b7a44cd8110c726057cd28e8f8116885eb -
LinuxLinux 5.15 -

II. Public POCs for CVE-2022-48923

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III. Intelligence Information for CVE-2022-48923

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Same Patch Batch · Linux · 2024-08-22 · 42 CVEs total

CVE-2022-48931configfs: fix a race in configfs_{,un}register_subsystem()
CVE-2022-48922riscv: fix oops caused by irqsoff latency tracer
CVE-2022-48924thermal: int340x: fix memory leak in int3400_notify()
CVE-2022-48925RDMA/cma: Do not change route.addr.src_addr outside state checks
CVE-2022-48942hwmon: Handle failure to register sensor with thermal zone correctly
CVE-2022-48943KVM: x86/mmu: make apf token non-zero to fix bug
CVE-2022-48926usb: gadget: rndis: add spinlock for rndis response list
CVE-2022-48927iio: adc: tsc2046: fix memory corruption by preventing array overflow
CVE-2022-48928iio: adc: men_z188_adc: Fix a resource leak in an error handling path
CVE-2022-48929bpf: Fix crash due to out of bounds access into reg2btf_ids.
CVE-2022-48930RDMA/ib_srp: Fix a deadlock
CVE-2022-48921sched/fair: Fix fault in reweight_entity
CVE-2022-48932net/mlx5: DR, Fix slab-out-of-bounds in mlx5_cmd_dr_create_fte
CVE-2022-48933netfilter: nf_tables: fix memory leak during stateful obj update
CVE-2022-48934nfp: flower: Fix a potential leak in nfp_tunnel_add_shared_mac()
CVE-2022-48935netfilter: nf_tables: unregister flowtable hooks on netns exit
CVE-2022-48937io_uring: add a schedule point in io_add_buffers()
CVE-2022-48938CDC-NCM: avoid overflow in sanity checking
CVE-2022-48939bpf: Add schedule points in batch ops
CVE-2022-48940bpf: Fix crash due to incorrect copy_map_value

Showing top 20 of 42 CVEs. View all on vendor page &rarr; →

IV. Related Vulnerabilities

Same product: Linux
Same vendor: Linux

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