In the Linux kernel, the following vulnerability has been resolved:
ACPI: custom_method: fix potential use-after-free issue
In cm_write(), buf is always freed when reaching the end of the function. If the requested count is less than table.length, the allocated buffer will be freed but subsequent calls to cm_write() will still try to access it.
Remove the unconditional kfree(buf) at the end of the function and set the buf to NULL in the -EINVAL error path to match the rest of function.
CVSS Details
- CVSS 3.1 Base Score: 7.8
- CVSS 3.1 Vector: (CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H)
Covered by Rapid7
| Product | Vendor Advisory | Solution File | Added | Published |
|---|---|---|---|---|
| Debian | — | Upgrade linux | Jul 30, 2024 | Feb 27, 2024 |
| Redhat_linux | — | No solution exists | Jul 9, 2025 | Feb 27, 2024 |
| Suse | — | Upgrade kernel-preemptUpgrade kernel-default-baseUpgrade kernel-defaultUpgrade kernel-zfcpdumpUpgrade kernel-preempt-develUpgrade kernel-develUpgrade kernel-symsUpgrade kernel-docsUpgrade kernel-default-extraUpgrade kernel-64kb-develUpgrade reiserfs-kmp-defaultUpgrade kernel-sourceUpgrade kernel-obs-buildUpgrade kernel-devel-azureUpgrade kernel-azure-develUpgrade kernel-source-azureUpgrade kernel-macrosUpgrade kernel-64kbUpgrade kernel-azure-baseUpgrade kernel-syms-azureUpgrade kernel-azureUpgrade kernel-default-manUpgrade kernel-default-devel | Aug 9, 2024 | Feb 27, 2024 |
| Ubuntu | — | Upgrade linux-image-genericUpgrade linux-image-lowlatencyUpgrade linux-image-4.4.0-253-genericUpgrade linux-image-4.4.0-1131-kvmUpgrade linux-image-4.4.0-1168-awsUpgrade linux-image-lowlatency-lts-xenialUpgrade linux-image-awsUpgrade linux-image-4.4.0-1130-awsUpgrade linux-image-kvmUpgrade linux-image-4.4.0-253-lowlatencyUpgrade linux-image-virtualUpgrade linux-image-virtual-lts-xenialUpgrade linux-image-generic-lts-xenial | Apr 22, 2024 | Feb 27, 2024 |
Prioritise with Active Threat Intelligence
With curated Threat Intelligence, you can see which vulnerabilities truly put you at risk, prioritize what matters most, and act before attackers do.
Explore Intelligence Hub