CVE-2024-49856
- Source
- https://nvd.nist.gov/vuln/detail/CVE-2024-49856
- Import Source
- https://storage.googleapis.com/osv-test-cve-osv-conversion/osv-output/CVE-2024-49856.json
- JSON Data
- https://api.test.osv.dev/v1/vulns/CVE-2024-49856
- Downstream
- Related
- Published
- 2024-10-21T12:18:48.123Z
- Modified
- 2025-11-28T02:35:20.226746Z
- Summary
- x86/sgx: Fix deadlock in SGX NUMA node search
- Details
-
In the Linux kernel, the following vulnerability has been resolved:
x86/sgx: Fix deadlock in SGX NUMA node search
When the current node doesn't have an EPC section configured by firmware and all other EPC sections are used up, CPU can get stuck inside the while loop that looks for an available EPC page from remote nodes indefinitely, leading to a soft lockup. Note how nidofcurrent will never be equal to nid in that while loop because nidofcurrent is not set in sgxnumamask.
Also worth mentioning is that it's perfectly fine for the firmware not to setup an EPC section on a node. While setting up an EPC section on each node can enhance performance, it is not a requirement for functionality.
Rework the loop to start and end on a node that has SGX memory. This avoids the deadlock looking for the current SGX-lacking node to show up in the loop when it never will.
- Database specific
{ "cna_assigner": "Linux", "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2024/49xxx/CVE-2024-49856.json" }- References
-
- https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
- https://git.kernel.org/stable/c/0f89fb4042c08fd143bfc28af08bf6c8a0197eea
- https://git.kernel.org/stable/c/20c96d0aaabfe361fc2a11c173968dc67feadbbf
- https://git.kernel.org/stable/c/40fb64257dab507d86b5f1f2a62f3669ef0c91a8
- https://git.kernel.org/stable/c/8132510c915815e6b537ab937d94ed66893bc7b8
- https://git.kernel.org/stable/c/9c936844010466535bd46ea4ce4656ef17653644
- https://git.kernel.org/stable/c/fb2d057539eda67ec7cfc369bf587e6518a9b99d
- https://github.com/CVEProject/cvelistV5/tree/main/cves/2024/49xxx/CVE-2024-49856.json
- https://lists.debian.org/debian-lts-announce/2025/01/msg00001.html
- https://nvd.nist.gov/vuln/detail/CVE-2024-49856
Affected packages
Git / git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
Affected ranges
- Type
- GIT
- Repo
- https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
- Events
-
Introduced901ddbb9ecf5425183ea0c09d10c2fd7868dce54Fixed40fb64257dab507d86b5f1f2a62f3669ef0c91a8Fixed20c96d0aaabfe361fc2a11c173968dc67feadbbfFixedfb2d057539eda67ec7cfc369bf587e6518a9b99dFixed0f89fb4042c08fd143bfc28af08bf6c8a0197eeaFixed8132510c915815e6b537ab937d94ed66893bc7b8Fixed9c936844010466535bd46ea4ce4656ef17653644