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CVE-2023-53516— macvlan: add forgotten nla_policy for IFLA_MACVLAN_BC_CUTOFF

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，该漏洞源于缺少IFLA_MACVLAN_BC_CUTOFF属性的nla_policy描述，可能导致堆越界读取。

AI Predicted 5.5 Difficulty: Moderate EPSS 0.15% · P4

Possible ATT&CK Techniques 1 AI

T1203 · Exploitation for Client Execution

Affected Version Matrix 6

VendorProduct Version RangeStatus
Linux Linux 954d1fa1ac93aa8a66f7d9a9ba545cf7f020d348< 79f44709aa7a744fbfbadd4aef678443290c6991 affected
954d1fa1ac93aa8a66f7d9a9ba545cf7f020d348< 55cef78c244d0d076f5a75a35530ca63c92f4426 affected
6.4 affected
< 6.4 unaffected
6.4.8≤ 6.4.* unaffected
6.5≤ * unaffected
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I. Basic Information for CVE-2023-53516

Vulnerability Information
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Vulnerability Title
macvlan: add forgotten nla_policy for IFLA_MACVLAN_BC_CUTOFF
Source: CVE Program / CVE List V5
Vulnerability Description
In the Linux kernel, the following vulnerability has been resolved: macvlan: add forgotten nla_policy for IFLA_MACVLAN_BC_CUTOFF The previous commit 954d1fa1ac93 ("macvlan: Add netlink attribute for broadcast cutoff") added one additional attribute named IFLA_MACVLAN_BC_CUTOFF to allow broadcast cutfoff. However, it forgot to describe the nla_policy at macvlan_policy (drivers/net/macvlan.c). Hence, this suppose NLA_S32 (4 bytes) integer can be faked as empty (0 bytes) by a malicious user, which could leads to OOB in heap just like CVE-2023-3773. To fix it, this commit just completes the nla_policy description for IFLA_MACVLAN_BC_CUTOFF. This enforces the length check and avoids the potential OOB read.
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，该漏洞源于缺少IFLA_MACVLAN_BC_CUTOFF属性的nla_policy描述，可能导致堆越界读取。
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 954d1fa1ac93aa8a66f7d9a9ba545cf7f020d348 ~ 79f44709aa7a744fbfbadd4aef678443290c6991 -
Linux Linux 6.4 -

II. Public POCs for CVE-2023-53516

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III. Intelligence Information for CVE-2023-53516

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Same Patch Batch · Linux · 2025-10-01 · 169 CVEs total

CVE-2023-53517 9.8 CRITICAL tipc: do not update mtu if msg_max is too small in mtu negotiation
CVE-2023-53454 8.8 HIGH HID: multitouch: Correct devm device reference for hidinput input_dev name
CVE-2025-39918 8.8 HIGH wifi: mt76: fix linked list corruption
CVE-2025-39919 8.8 HIGH wifi: mt76: mt7996: add missing check for rx wcid entries
CVE-2022-50442 8.4 HIGH fs/ntfs3: Validate buffer length while parsing index
CVE-2023-53493 8.4 HIGH accel/qaic: tighten bounds checking in decode_message()
CVE-2022-50421 7.8 HIGH rpmsg: char: Avoid double destroy of default endpoint
CVE-2023-53484 7.8 HIGH lib: cpu_rmap: Avoid use after free on rmap->obj array entries
CVE-2022-50440 7.8 HIGH drm/vmwgfx: Validate the box size for the snooped cursor
CVE-2023-53510 7.8 HIGH scsi: ufs: core: Fix handling of lrbp->cmd
CVE-2025-39924 7.8 HIGH erofs: fix invalid algorithm for encoded extents
CVE-2023-53465 7.8 HIGH soundwire: qcom: fix storing port config out-of-bounds
CVE-2023-53506 7.8 HIGH udf: Do not bother merging very long extents
CVE-2025-39927 7.8 HIGH ceph: fix race condition validating r_parent before applying state
CVE-2022-50454 7.8 HIGH drm/nouveau: fix a use-after-free in nouveau_gem_prime_import_sg_table()
CVE-2022-50437 7.8 HIGH drm/msm/hdmi: fix memory corruption with too many bridges
CVE-2023-53494 7.8 HIGH crypto: xts - Handle EBUSY correctly
CVE-2023-53492 7.8 HIGH netfilter: nf_tables: do not ignore genmask when looking up chain by id
CVE-2022-50432 7.8 HIGH kernfs: fix use-after-free in __kernfs_remove
CVE-2023-53490 7.8 HIGH mptcp: fix disconnect vs accept race

Showing top 20 of 169 CVEs. View all on vendor page &rarr; →

IV. Related Vulnerabilities

Same product: Linux
Same vendor: Linux

V. Comments for CVE-2023-53516

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