CVE-2024-26856: net: sparx5: Fix use after free inside sparx5_del_mact_entry
First published: Wed Apr 17 2024(Updated: )
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.
Credit: 416baaa9-dc9f-4396-8d5f-8c081fb06d67 416baaa9-dc9f-4396-8d5f-8c081fb06d67
| Affected Software | Affected Version | How to fix |
|---|---|---|
| Linux Kernel | >=5.14<5.15.152 | |
| Linux Kernel | >=5.16<6.1.82 | |
| Linux Kernel | >=6.2<6.6.22 | |
| Linux Kernel | >=6.7<6.7.10 | |
| Linux Kernel | =6.8-rc1 | |
| Linux Kernel | =6.8-rc2 | |
| Linux Kernel | =6.8-rc3 | |
| Linux Kernel | =6.8-rc4 | |
| Linux Kernel | =6.8-rc5 | |
| Linux Kernel | =6.8-rc6 | |
| debian/linux | 5.10.223-1 5.10.234-1 6.1.129-1 6.1.135-1 6.12.22-1 6.12.25-1 |
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Reference Links
- https://git.kernel.org/stable/c/0de693d68b0a18d5e256556c7c62d92cca35ad52
- https://git.kernel.org/stable/c/71809805b95052ff551922f11660008fb3666025
- https://git.kernel.org/stable/c/89d72d4125e94aa3c2140fedd97ce07ba9e37674
- https://git.kernel.org/stable/c/e46274df1100fb0c06704195bfff5bfbd418bf64
- https://git.kernel.org/stable/c/e83bebb718fd1f42549358730e1206164e0861d6
- https://launchpad.net/bugs/cve/CVE-2024-26856
- https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2024-26856
- https://nvd.nist.gov/vuln/detail/CVE-2024-26856
- https://security-tracker.debian.org/tracker/CVE-2024-26856
- https://ubuntu.com/security/CVE-2024-26856
- https://git.kernel.org/linus/89d72d4125e94aa3c2140fedd97ce07ba9e37674
Frequently Asked Questions
What is the severity of CVE-2024-26856?
CVE-2024-26856 is classified as a medium severity vulnerability.
How do I fix CVE-2024-26856?
To fix CVE-2024-26856, upgrade to the patched versions of the Linux kernel specified in the advisory.
What systems are affected by CVE-2024-26856?
CVE-2024-26856 affects specific Debian Linux kernel versions, including 5.10.223-1, 5.10.226-1, 6.1.123-1, 6.1.119-1, 6.12.11-1, and 6.12.12-1.
What does CVE-2024-26856 exploit?
CVE-2024-26856 exploits a use-after-free vulnerability in the MAC table management of the Linux kernel's sparx5 driver.
Is CVE-2024-26856 under active exploitation?
As of the latest information, there are no confirmed reports indicating active exploitation of CVE-2024-26856.
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