CVE-2024-26761
cxl/pci: Fix disabling memory if DVSEC CXL Range does not match a CFMWS window
Description
In the Linux kernel, the following vulnerability has been resolved: cxl/pci: Fix disabling memory if DVSEC CXL Range does not match a CFMWS window The Linux CXL subsystem is built on the assumption that HPA == SPA. That is, the host physical address (HPA) the HDM decoder registers are programmed with are system physical addresses (SPA). During HDM decoder setup, the DVSEC CXL range registers (cxl-3.1, 8.1.3.8) are checked if the memory is enabled and the CXL range is in a HPA window that is described in a CFMWS structure of the CXL host bridge (cxl-3.1, 9.18.1.3). Now, if the HPA is not an SPA, the CXL range does not match a CFMWS window and the CXL memory range will be disabled then. The HDM decoder stops working which causes system memory being disabled and further a system hang during HDM decoder initialization, typically when a CXL enabled kernel boots. Prevent a system hang and do not disable the HDM decoder if the decoder's CXL range is not found in a CFMWS window. Note the change only fixes a hardware hang, but does not implement HPA/SPA translation. Support for this can be added in a follow on patch series.
INFO
Published Date :
April 3, 2024, 5:15 p.m.
Last Modified :
March 17, 2025, 4:56 p.m.
Remotely Exploit :
No
Source :
416baaa9-dc9f-4396-8d5f-8c081fb06d67
CVSS Scores
| Score | Version | Severity | Vector | Exploitability Score | Impact Score | Source |
|---|---|---|---|---|---|---|
| CVSS 3.1 | MEDIUM | [email protected] |
Solution
- Update the Linux kernel to a patched version.
- Reboot the system after the update.
References to Advisories, Solutions, and Tools
Here, you will find a curated list of external links that provide in-depth
information, practical solutions, and valuable tools related to
CVE-2024-26761.
CWE - Common Weakness Enumeration
While CVE identifies
specific instances of vulnerabilities, CWE categorizes the common flaws or
weaknesses that can lead to vulnerabilities. CVE-2024-26761 is
associated with the following CWEs:
Common Attack Pattern Enumeration and Classification (CAPEC)
Common Attack Pattern Enumeration and Classification
(CAPEC)
stores attack patterns, which are descriptions of the common attributes and
approaches employed by adversaries to exploit the CVE-2024-26761
weaknesses.
We scan GitHub repositories to detect new proof-of-concept exploits. Following list is a collection of public exploits and proof-of-concepts, which have been published on GitHub (sorted by the most recently updated).
Results are limited to the first 15 repositories due to potential performance issues.
The following list is the news that have been mention
CVE-2024-26761 vulnerability anywhere in the article.
The following table lists the changes that have been made to the
CVE-2024-26761 vulnerability over time.
Vulnerability history details can be useful for understanding the evolution of a vulnerability, and for identifying the most recent changes that may impact the vulnerability's severity, exploitability, or other characteristics.
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Initial Analysis by [email protected]
Mar. 17, 2025
Action Type Old Value New Value Added CVSS V3.1 AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H Added CWE NVD-CWE-noinfo Added CPE Configuration OR *cpe:2.3:o:linux:linux_kernel:6.8:rc1:*:*:*:*:*:* *cpe:2.3:o:linux:linux_kernel:6.8:rc3:*:*:*:*:*:* *cpe:2.3:o:linux:linux_kernel:6.8:rc4:*:*:*:*:*:* *cpe:2.3:o:linux:linux_kernel:6.8:rc2:*:*:*:*:*:* *cpe:2.3:o:linux:linux_kernel:6.8:rc5:*:*:*:*:*:* *cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* versions from (including) 6.7 up to (excluding) 6.7.7 *cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* versions from (including) 5.19 up to (excluding) 6.1.80 *cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* versions from (including) 6.2 up to (excluding) 6.6.19 Added Reference Type CVE: https://git.kernel.org/stable/c/031217128990d7f0ab8c46db1afb3cf1e075fd29 Types: Patch Added Reference Type kernel.org: https://git.kernel.org/stable/c/031217128990d7f0ab8c46db1afb3cf1e075fd29 Types: Patch Added Reference Type CVE: https://git.kernel.org/stable/c/0cab687205986491302cd2e440ef1d253031c221 Types: Patch Added Reference Type kernel.org: https://git.kernel.org/stable/c/0cab687205986491302cd2e440ef1d253031c221 Types: Patch Added Reference Type CVE: https://git.kernel.org/stable/c/2cc1a530ab31c65b52daf3cb5d0883c8b614ea69 Types: Patch Added Reference Type kernel.org: https://git.kernel.org/stable/c/2cc1a530ab31c65b52daf3cb5d0883c8b614ea69 Types: Patch Added Reference Type CVE: https://git.kernel.org/stable/c/3a3181a71935774bda2398451256d7441426420b Types: Patch Added Reference Type kernel.org: https://git.kernel.org/stable/c/3a3181a71935774bda2398451256d7441426420b Types: Patch -
CVE Modified by af854a3a-2127-422b-91ae-364da2661108
Nov. 21, 2024
Action Type Old Value New Value Added Reference https://git.kernel.org/stable/c/031217128990d7f0ab8c46db1afb3cf1e075fd29 Added Reference https://git.kernel.org/stable/c/0cab687205986491302cd2e440ef1d253031c221 Added Reference https://git.kernel.org/stable/c/2cc1a530ab31c65b52daf3cb5d0883c8b614ea69 Added Reference https://git.kernel.org/stable/c/3a3181a71935774bda2398451256d7441426420b -
CVE Modified by 416baaa9-dc9f-4396-8d5f-8c081fb06d67
May. 29, 2024
Action Type Old Value New Value -
CVE Modified by 416baaa9-dc9f-4396-8d5f-8c081fb06d67
May. 14, 2024
Action Type Old Value New Value -
CVE Received by 416baaa9-dc9f-4396-8d5f-8c081fb06d67
Apr. 03, 2024
Action Type Old Value New Value Added Description In the Linux kernel, the following vulnerability has been resolved: cxl/pci: Fix disabling memory if DVSEC CXL Range does not match a CFMWS window The Linux CXL subsystem is built on the assumption that HPA == SPA. That is, the host physical address (HPA) the HDM decoder registers are programmed with are system physical addresses (SPA). During HDM decoder setup, the DVSEC CXL range registers (cxl-3.1, 8.1.3.8) are checked if the memory is enabled and the CXL range is in a HPA window that is described in a CFMWS structure of the CXL host bridge (cxl-3.1, 9.18.1.3). Now, if the HPA is not an SPA, the CXL range does not match a CFMWS window and the CXL memory range will be disabled then. The HDM decoder stops working which causes system memory being disabled and further a system hang during HDM decoder initialization, typically when a CXL enabled kernel boots. Prevent a system hang and do not disable the HDM decoder if the decoder's CXL range is not found in a CFMWS window. Note the change only fixes a hardware hang, but does not implement HPA/SPA translation. Support for this can be added in a follow on patch series. Added Reference kernel.org https://git.kernel.org/stable/c/031217128990d7f0ab8c46db1afb3cf1e075fd29 [No types assigned] Added Reference kernel.org https://git.kernel.org/stable/c/2cc1a530ab31c65b52daf3cb5d0883c8b614ea69 [No types assigned] Added Reference kernel.org https://git.kernel.org/stable/c/3a3181a71935774bda2398451256d7441426420b [No types assigned] Added Reference kernel.org https://git.kernel.org/stable/c/0cab687205986491302cd2e440ef1d253031c221 [No types assigned]