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Review reviewHigh

CVE-2023-53570

Linux Linux, linux kernel

In the Linux kernel, the following vulnerability has been resolved: wifi: nl80211: fix integer overflow in nl80211_parse_mbssid_elems() nl80211_parse_mbssid_elems() uses a u8 variable num_elems to count the number of MBSSID elements in the nested netlink attribute attrs, which can lead to an integer overflow if a user of the nl80211 interface specifies 256 or more elements in the corresponding attribute in userspace. The integer overflow can lead to a heap buffer overflow as num_elems determines the size of the trailing array in elems, and this array is thereafter written to for each elemen...

CVSS
7.8
EPSS
-
- percentile
CISA KEV
Not listed
Published
2025.10.05
PRIORITY ASSESSMENT

Review review

The CVSS severity warrants an early asset and exposure review.

Known exploitationNot established by KEV
Exploit probability-
Technical severityCVSS 7.8

Vulnerability overview

In the Linux kernel, the following vulnerability has been resolved: wifi: nl80211: fix integer overflow in nl80211_parse_mbssid_elems() nl80211_parse_mbssid_elems() uses a u8 variable num_elems to count the number of MBSSID elements in the nested netlink attribute attrs, which can lead to an integer overflow if a user of the nl80211 interface specifies 256 or more elements in the corresponding attribute in userspace. The integer overflow can lead to a heap buffer overflow as num_elems determines the size of the trailing array in elems, and this array is thereafter written to for each elemen...

Affected product and versions

Product
Linux Linux, linux kernel
Affected versions
>= dc1e3cb8da8b414b37208b2fb6755fef8122504b < e642eb67b8c10dcce758d549cc81564116e0fa49, >= dc1e3cb8da8b414b37208b2fb6755fef8122504b < 7d09f9f255a5f78578deba5454923072bb53b16c, >= dc1e3cb8da8b414b37208b2fb6755fef8122504b < 6311071a056272e1e761de8d0305e87cc566f734, >= 5.16, >= 5.16 < 6.1.46, >= 6.2 < 6.4.11, 6.5
Fixed versions
6.1.46, 6.4.11

Recommended response sequence

Confirm exposure before applying a vendor-supported change.

Full remediation guide
  1. 1
    Identify

    Confirm that Linux Linux, linux kernel and an affected version are present.

  2. 2
    Prioritize

    Combine exploitation signals with asset exposure and business criticality.

  3. 3
    Remediate

    Follow the vendor advisory or supported update path and preserve rollback options.

  4. 4
    Verify

    Recheck the version, service health, access paths, and relevant logs.

Technical data

CVSS vector
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
CWE
CWE-190