CVE-2023-53272— net: ena: fix shift-out-of-bounds in exponential backoff
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I. Basic Information for CVE-2023-53272
Vulnerability Information
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Vulnerability Title
net: ena: fix shift-out-of-bounds in exponential backoff
Source: NVD (National Vulnerability Database)
Vulnerability Description
In the Linux kernel, the following vulnerability has been resolved: net: ena: fix shift-out-of-bounds in exponential backoff The ENA adapters on our instances occasionally reset. Once recently logged a UBSAN failure to console in the process: UBSAN: shift-out-of-bounds in build/linux/drivers/net/ethernet/amazon/ena/ena_com.c:540:13 shift exponent 32 is too large for 32-bit type 'unsigned int' CPU: 28 PID: 70012 Comm: kworker/u72:2 Kdump: loaded not tainted 5.15.117 Hardware name: Amazon EC2 c5d.9xlarge/, BIOS 1.0 10/16/2017 Workqueue: ena ena_fw_reset_device [ena] Call Trace: <TASK> dump_stack_lvl+0x4a/0x63 dump_stack+0x10/0x16 ubsan_epilogue+0x9/0x36 __ubsan_handle_shift_out_of_bounds.cold+0x61/0x10e ? __const_udelay+0x43/0x50 ena_delay_exponential_backoff_us.cold+0x16/0x1e [ena] wait_for_reset_state+0x54/0xa0 [ena] ena_com_dev_reset+0xc8/0x110 [ena] ena_down+0x3fe/0x480 [ena] ena_destroy_device+0xeb/0xf0 [ena] ena_fw_reset_device+0x30/0x50 [ena] process_one_work+0x22b/0x3d0 worker_thread+0x4d/0x3f0 ? process_one_work+0x3d0/0x3d0 kthread+0x12a/0x150 ? set_kthread_struct+0x50/0x50 ret_from_fork+0x22/0x30 </TASK> Apparently, the reset delays are getting so large they can trigger a UBSAN panic. Looking at the code, the current timeout is capped at 5000us. Using a base value of 100us, the current code will overflow after (1<<29). Even at values before 32, this function wraps around, perhaps unintentionally. Cap the value of the exponent used for this backoff at (1<<16) which is larger than currently necessary, but large enough to support bigger values in the future.
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ena_com组件中存在指数退避计算的移位越界问题，可能导致系统不稳定。
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
II. Public POCs for CVE-2023-53272
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Same Patch Batch · Linux · 2025-09-16 · 115 CVEs total
| CVE-2022-50340 | media: vimc: Fix wrong function called when vimc_init() fails | |
| CVE-2023-53307 | rbd: avoid use-after-free in do_rbd_add() when rbd_dev_create() fails | |
| CVE-2023-53305 | Bluetooth: L2CAP: Fix use-after-free | |
| CVE-2023-53304 | netfilter: nft_set_rbtree: fix overlap expiration walk | |
| CVE-2022-50351 | cifs: Fix xid leak in cifs_create() | |
| CVE-2022-50352 | net: hns: fix possible memory leak in hnae_ae_register() | |
| CVE-2022-50350 | scsi: target: iscsi: Fix a race condition between login_work and the login thread | |
| CVE-2022-50348 | nfsd: Fix a memory leak in an error handling path | |
| CVE-2022-50349 | misc: tifm: fix possible memory leak in tifm_7xx1_switch_media() | |
| CVE-2022-50347 | mmc: rtsx_usb_sdmmc: fix return value check of mmc_add_host() | |
| CVE-2022-50346 | ext4: init quota for 'old.inode' in 'ext4_rename' | |
| CVE-2022-50343 | rapidio: fix possible name leaks when rio_add_device() fails | |
| CVE-2022-50344 | ext4: fix null-ptr-deref in ext4_write_info | |
| CVE-2022-50342 | floppy: Fix memory leak in do_floppy_init() | |
| CVE-2022-50341 | cifs: fix oops during encryption | |
| CVE-2025-39827 | net: rose: include node references in rose_neigh refcount | |
| CVE-2025-39830 | net/mlx5: HWS, Fix memory leak in hws_pool_buddy_init error path | |
| CVE-2025-39829 | trace/fgraph: Fix the warning caused by missing unregister notifier | |
| CVE-2025-39828 | atm: atmtcp: Prevent arbitrary write in atmtcp_recv_control(). | |
| CVE-2025-39831 | fbnic: Move phylink resume out of service_task and into open/close |
Showing top 20 of 115 CVEs. View all on vendor page → →
IV. Related Vulnerabilities
Same product: Linux
- CVE-2026-43500
rxrpc: Also unshare DATA/RESPONSE packets when paged frags a - CVE-2026-43475
scsi: storvsc: Fix scheduling while atomic on PREEMPT_RT - CVE-2026-43474
fs: init flags_valid before calling vfs_fileattr_get - CVE-2026-43473
scsi: mpi3mr: Add NULL checks when resetting request and rep - CVE-2026-43472
unshare: fix unshare_fs() handling
Same vendor: Linux
- CVE-2026-43500
rxrpc: Also unshare DATA/RESPONSE packets when paged frags a - CVE-2026-43475
scsi: storvsc: Fix scheduling while atomic on PREEMPT_RT - CVE-2026-43474
fs: init flags_valid before calling vfs_fileattr_get - CVE-2026-43473
scsi: mpi3mr: Add NULL checks when resetting request and rep - CVE-2026-43472
unshare: fix unshare_fs() handling
V. Comments for CVE-2023-53272
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