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CVE-2023-53720— net/mlx5e: Release the label when replacing existing ct entry

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，该漏洞源于替换现有ct条目时未释放标签映射，可能导致内存泄漏。

AI Predicted 5.5 Difficulty: Moderate EPSS 0.18% · P8

Possible ATT&CK Techniques 1 AI

T1496 · Resource Hijacking

Affected Version Matrix 6

VendorProduct Version RangeStatus
Linux Linux 94ceffb48eac7692677d8093dcde6965b70c4b35< 3db903a71f1f4bbf30baae166a4a49f2e8aceb61 affected
94ceffb48eac7692677d8093dcde6965b70c4b35< 8ac04a28144cfa89b61be518268233742c23d88d affected
6.3 affected
< 6.3 unaffected
6.3.2≤ 6.3.* unaffected
6.4≤ * unaffected
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I. Basic Information for CVE-2023-53720

Vulnerability Information
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Vulnerability Title
net/mlx5e: Release the label when replacing existing ct entry
Source: CVE Program / CVE List V5
Vulnerability Description
In the Linux kernel, the following vulnerability has been resolved: net/mlx5e: Release the label when replacing existing ct entry Cited commit doesn't release the label mapping when replacing existing ct entry which leads to following memleak report: unreferenced object 0xffff8881854cf280 (size 96): comm "kworker/u48:74", pid 23093, jiffies 4296664564 (age 175.944s) hex dump (first 32 bytes): 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................ 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................ backtrace: [<000000002722d368>] __kmalloc+0x4b/0x1c0 [<00000000cc44e18f>] mapping_add+0x6e8/0xc90 [mlx5_core] [<000000003ad942a7>] mlx5_get_label_mapping+0x66/0xe0 [mlx5_core] [<00000000266308ac>] mlx5_tc_ct_entry_create_mod_hdr+0x1c4/0xf50 [mlx5_core] [<000000009a768b4f>] mlx5_tc_ct_entry_add_rule+0x16f/0xaf0 [mlx5_core] [<00000000a178f3e5>] mlx5_tc_ct_block_flow_offload_add+0x10cb/0x1f90 [mlx5_core] [<000000007b46c496>] mlx5_tc_ct_block_flow_offload+0x14a/0x630 [mlx5_core] [<00000000a9a18ac5>] nf_flow_offload_tuple+0x1a3/0x390 [nf_flow_table] [<00000000d0881951>] flow_offload_work_handler+0x257/0xd30 [nf_flow_table] [<000000009e4935a4>] process_one_work+0x7c2/0x13e0 [<00000000f5cd36a7>] worker_thread+0x59d/0xec0 [<00000000baed1daf>] kthread+0x28f/0x330 [<0000000063d282a4>] ret_from_fork+0x1f/0x30 Fix the issue by correctly releasing the label mapping.
Source: CVE Program / CVE List V5
CVSS Information
N/A
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，该漏洞源于替换现有ct条目时未释放标签映射，可能导致内存泄漏。
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 94ceffb48eac7692677d8093dcde6965b70c4b35 ~ 3db903a71f1f4bbf30baae166a4a49f2e8aceb61 -
Linux Linux 6.3 -

II. Public POCs for CVE-2023-53720

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III. Intelligence Information for CVE-2023-53720

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Patches & Fixes for CVE-2023-53720 (2)

Same Patch Batch · Linux · 2025-10-22 · 67 CVEs total

CVE-2023-53711 8.2 HIGH NFS: Fix a potential data corruption
CVE-2023-53705 8.2 HIGH ipv6: Fix out-of-bounds access in ipv6_find_tlv()
CVE-2022-50567 7.8 HIGH fs: jfs: fix shift-out-of-bounds in dbAllocAG
CVE-2023-53729 7.8 HIGH soc: qcom: qmi_encdec: Restrict string length in decode
CVE-2023-53698 7.8 HIGH xsk: fix refcount underflow in error path
CVE-2023-53695 7.8 HIGH udf: Detect system inodes linked into directory hierarchy
CVE-2023-53692 7.8 HIGH ext4: fix use-after-free read in ext4_find_extent for bigalloc + inline
CVE-2023-53707 7.8 HIGH drm/amdgpu: Fix integer overflow in amdgpu_cs_pass1
CVE-2022-50570 7.8 HIGH platform/chrome: fix memory corruption in ioctl
CVE-2022-50569 7.8 HIGH xfrm: Update ipcomp_scratches with NULL when freed
CVE-2023-53718 7.8 HIGH ring-buffer: Do not swap cpu_buffer during resize process
CVE-2022-50581 7.8 HIGH hfs: fix OOB Read in __hfs_brec_find
CVE-2023-53713 7.8 HIGH arm64: sme: Use STR P to clear FFR context field in streaming SVE mode
CVE-2023-53726 7.1 HIGH arm64: csum: Fix OoB access in IP checksum code for negative lengths
CVE-2023-53716 net: fix skb leak in __skb_tstamp_tx()
CVE-2023-53708 ACPI: x86: s2idle: Catch multiple ACPI_TYPE_PACKAGE objects
CVE-2023-53706 mm/vmemmap/devdax: fix kernel crash when probing devdax devices
CVE-2023-53704 clk: imx: clk-imx8mp: improve error handling in imx8mp_clocks_probe()
CVE-2023-53712 ARM: 9317/1: kexec: Make smp stop calls asynchronous
CVE-2023-53702 s390/crypto: use vector instructions only if available for ChaCha20

Showing top 20 of 67 CVEs. View all on vendor page &rarr; →

IV. Related Vulnerabilities

Same product: Linux
Same vendor: Linux

V. Comments for CVE-2023-53720

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