SECUFOCUSNOW
Home›CVE index›CVE-2024-26856
Review reviewHigh

CVE-2024-26856

Linux Linux, linux kernel

In the Linux kernel, the following vulnerability has been resolved: net: sparx5: Fix use after free inside sparx5_del_mact_entry Based on the static analyzis of the code it looks like when an entry from the MAC table was removed, the entry was still used after being freed. More precise the vid of the mac_entry was used after calling devm_kfree on the mac_entry. The fix consists in first using the vid of the mac_entry to delete the entry from the HW and after that to free it.

CVSS
7.8
EPSS
0.32%
24.3% percentile
CISA KEV
Not listed
Published
2024.04.17
PRIORITY ASSESSMENT

Review review

The CVSS severity warrants an early asset and exposure review.

Known exploitationNot established by KEV
Exploit probability0.32%
Technical severityCVSS 7.8

Vulnerability overview

In the Linux kernel, the following vulnerability has been resolved: net: sparx5: Fix use after free inside sparx5_del_mact_entry Based on the static analyzis of the code it looks like when an entry from the MAC table was removed, the entry was still used after being freed. More precise the vid of the mac_entry was used after calling devm_kfree on the mac_entry. The fix consists in first using the vid of the mac_entry to delete the entry from the HW and after that to free it.

Affected product and versions

Product
Linux Linux, linux kernel
Affected versions
>= b37a1bae742f92cc9b1f777d54e04ee3d86bbfc2 < e46274df1100fb0c06704195bfff5bfbd418bf64, >= b37a1bae742f92cc9b1f777d54e04ee3d86bbfc2 < 0de693d68b0a18d5e256556c7c62d92cca35ad52, >= b37a1bae742f92cc9b1f777d54e04ee3d86bbfc2 < e83bebb718fd1f42549358730e1206164e0861d6, >= b37a1bae742f92cc9b1f777d54e04ee3d86bbfc2 < 71809805b95052ff551922f11660008fb3666025, >= b37a1bae742f92cc9b1f777d54e04ee3d86bbfc2 < 89d72d4125e94aa3c2140fedd97ce07ba9e37674, >= 5.14, >= 5.14 < 5.15.152, >= 5.16 < 6.1.82, >= 6.2 < 6.6.22, >= 6.7 < 6.7.10, 6.8
Fixed versions
5.15.152, 6.1.82, 6.6.22, 6.7.10

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-416