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CVE-2023-53817— crypto: lib/mpi - avoid null pointer deref in mpi_cmp_ui()

Quick assessment

Affected
Linux Linux
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

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mpi_cmp_ui未正确处理零值比较，可能导致空指针取消引用。

CVSS 7.5 · High EPSS 0.52% · P42

Possible ATT&CK Techniques 1 AI

T1068 · Exploitation for Privilege Escalation

Affected Version Matrix 18

VendorProduct Version RangeStatus
Linux Linux 12f008b6dc5ff1c822fdb2198d20e3dbdc92f3f5< fde791e8a96a64ea7b0ad2440e43586447a209c6 affected
12f008b6dc5ff1c822fdb2198d20e3dbdc92f3f5< ae63e84ffda74267bf7277c38415ba38389229a0 affected
12f008b6dc5ff1c822fdb2198d20e3dbdc92f3f5< 61f5453e9706e99713825594e0c8f9031485fb5f affected
12f008b6dc5ff1c822fdb2198d20e3dbdc92f3f5< 0fc7147c694394f8a8cbc19570c6bc918cac0906 affected
12f008b6dc5ff1c822fdb2198d20e3dbdc92f3f5< 67589d247909043e94d2dd5fb590958e0f99d58d affected
12f008b6dc5ff1c822fdb2198d20e3dbdc92f3f5< d3ad023a39f1127dcfd331c562673355dc078650 affected
12f008b6dc5ff1c822fdb2198d20e3dbdc92f3f5< 12ac013ad7ff0df066451e825801d805095b3776 affected
12f008b6dc5ff1c822fdb2198d20e3dbdc92f3f5< 9e47a758b70167c9301d2b44d2569f86c7796f2d affected
… +10 more rows
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I. Basic Information for CVE-2023-53817

Vulnerability Information
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Vulnerability Title
crypto: lib/mpi - avoid null pointer deref in mpi_cmp_ui()
Source: CVE Program / CVE List V5
Vulnerability Description
In the Linux kernel, the following vulnerability has been resolved: crypto: lib/mpi - avoid null pointer deref in mpi_cmp_ui() During NVMeTCP Authentication a controller can trigger a kernel oops by specifying the 8192 bit Diffie Hellman group and passing a correctly sized, but zeroed Diffie Hellamn value. mpi_cmp_ui() was detecting this if the second parameter was 0, but 1 is passed from dh_is_pubkey_valid(). This causes the null pointer u->d to be dereferenced towards the end of mpi_cmp_ui()
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Source: CVE Program / CVE List V5
Vulnerability Type
N/A
Source: CVE Program / CVE List V5
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mpi_cmp_ui未正确处理零值比较，可能导致空指针取消引用。
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

Vendor Product Affected Versions CPE Subscribe
Linux Linux 12f008b6dc5ff1c822fdb2198d20e3dbdc92f3f5 ~ fde791e8a96a64ea7b0ad2440e43586447a209c6 -
Linux Linux 3.7 -

II. Public POCs for CVE-2023-53817

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III. Intelligence Information for CVE-2023-53817

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Same Patch Batch · Linux · 2025-12-09 · 152 CVEs total

CVE-2025-40343 9.8 CRITICAL nvmet-fc: avoid scheduling association deletion twice
CVE-2023-53794 9.8 CRITICAL cifs: fix session state check in reconnect to avoid use-after-free issue
CVE-2022-50666 9.8 CRITICAL RDMA/siw: Fix QP destroy to wait for all references dropped.
CVE-2025-40342 8.8 HIGH nvme-fc: use lock accessing port_state and rport state
CVE-2023-53822 8.8 HIGH wifi: ath11k: Ignore frags from uninitialized peer in dp.
CVE-2025-40336 8.8 HIGH drm/gpusvm: fix hmm_pfn_to_map_order() usage
CVE-2023-53827 8.8 HIGH Bluetooth: L2CAP: Fix use-after-free in l2cap_disconnect_{req,rsp}
CVE-2023-53785 8.8 HIGH mt76: mt7921: don't assume adequate headroom for SDIO headers
CVE-2025-40328 8.8 HIGH smb: client: fix potential UAF in smb2_close_cached_fid()
CVE-2023-53851 8.4 HIGH drm/msm/dp: Drop aux devices together with DP controller
CVE-2025-40337 8.2 HIGH net: stmmac: Correctly handle Rx checksum offload errors
CVE-2023-53803 8.1 HIGH scsi: ses: Fix slab-out-of-bounds in ses_enclosure_data_process()
CVE-2022-50656 8.1 HIGH nfc: pn533: Clear nfc_target before being used
CVE-2023-53790 7.8 HIGH bpf: Zeroing allocated object from slab in bpf memory allocator
CVE-2023-53781 7.8 HIGH smc: Fix use-after-free in tcp_write_timer_handler().
CVE-2023-53819 7.8 HIGH amdgpu: validate offset_in_bo of drm_amdgpu_gem_va
CVE-2023-53860 7.8 HIGH dm: don't attempt to queue IO under RCU protection
CVE-2023-53838 7.8 HIGH f2fs: synchronize atomic write aborts
CVE-2023-53816 7.8 HIGH drm/amdkfd: fix potential kgd_mem UAFs
CVE-2023-53795 7.8 HIGH iommufd: IOMMUFD_DESTROY should not increase the refcount

Showing top 20 of 152 CVEs. View all on vendor page &rarr; →

IV. Related Vulnerabilities

Same product: Linux
Same vendor: Linux

V. Comments for CVE-2023-53817

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