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Review reviewHigh

CVE-2024-56663

Linux Linux, linux kernel

In the Linux kernel, the following vulnerability has been resolved: wifi: nl80211: fix NL80211_ATTR_MLO_LINK_ID off-by-one Since the netlink attribute range validation provides inclusive checking, the *max* of attribute NL80211_ATTR_MLO_LINK_ID should be IEEE80211_MLD_MAX_NUM_LINKS - 1 otherwise causing an off-by-one. One crash stack for demonstration: ================================================================== BUG: KASAN: wild-memory-access in ieee80211_tx_control_port+0x3b6/0xca0 net/mac80211/tx.c:5939 Read of size 6 at addr 001102080000000c by task fuzzer.386/9508 CPU: 1 PID: 9508...

CVSS
7.1
EPSS
-
- percentile
CISA KEV
Not listed
Published
2024.12.28
PRIORITY ASSESSMENT

Review review

The CVSS severity warrants an early asset and exposure review.

Known exploitationNot established by KEV
Exploit probability-
Technical severityCVSS 7.1

Vulnerability overview

In the Linux kernel, the following vulnerability has been resolved: wifi: nl80211: fix NL80211_ATTR_MLO_LINK_ID off-by-one Since the netlink attribute range validation provides inclusive checking, the *max* of attribute NL80211_ATTR_MLO_LINK_ID should be IEEE80211_MLD_MAX_NUM_LINKS - 1 otherwise causing an off-by-one. One crash stack for demonstration: ================================================================== BUG: KASAN: wild-memory-access in ieee80211_tx_control_port+0x3b6/0xca0 net/mac80211/tx.c:5939 Read of size 6 at addr 001102080000000c by task fuzzer.386/9508 CPU: 1 PID: 9508...

Affected product and versions

Product
Linux Linux, linux kernel
Affected versions
>= 7b0a0e3c3a88260b6fcb017e49f198463aa62ed1 < 29e640ae641b9f5ffc666049426d2b16c98d9963, >= 7b0a0e3c3a88260b6fcb017e49f198463aa62ed1 < f3412522f78826fef1dfae40ef378a863df2591c, >= 7b0a0e3c3a88260b6fcb017e49f198463aa62ed1 < f850d1d9f1106f528dfc5807565f2d1fa9a397d3, >= 7b0a0e3c3a88260b6fcb017e49f198463aa62ed1 < 2e3dbf938656986cce73ac4083500d0bcfbffe24, >= 7a53ad13c09150076b7ddde96c2dfc5622c90b45, >= 5.19.2 < 5.20, >= 6.0, >= 6.0 < 6.1.121, >= 6.2 < 6.6.67, >= 6.7 < 6.12.6, 6.13
Fixed versions
5.20, 6.1.121, 6.6.67, 6.12.6

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:N/A:H
CWE
CWE-193
CVE-2024-56663 — Linux Linux, linux kernel | SECUFOCUS NOW