CVE-2026-53325
agp/amd64: Fix broken error propagation in agp_amd64_probe()
Description
In the Linux kernel, the following vulnerability has been resolved: agp/amd64: Fix broken error propagation in agp_amd64_probe() A NULL pointer dereference was observed in the AMD64 AGP driver when running in a virtualized environment (e.g. qemu/kvm) without a physical AMD northbridge. The crash occurs in amd64_fetch_size() when attempting to dereference the pointer returned by node_to_amd_nb(0). The root cause of this crash is broken error propagation in agp_amd64_probe(): When no AMD northbridges are found, cache_nbs() correctly returns -ENODEV. However, the probe function erroneously checks the return value against exactly -1, rather than < 0. As a result, the hardware absence error is masked, allowing the driver to improperly proceed with initialization. It eventually calls agp_add_bridge(), which invokes amd64_fetch_size(). Since the hardware does not exist, node_to_amd_nb(0) returns NULL, leading to a General Protection Fault (GPF) when accessing its ->misc member. Fix the issue by correcting the error check in agp_amd64_probe() to abort properly when cache_nbs() returns any negative error code. This prevents the driver from erroneously proceeding without hardware, thereby avoiding the subsequent NULL pointer dereference at its source.
INFO
Published Date :
June 29, 2026, 6:16 a.m.
Last Modified :
July 6, 2026, 8:09 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.
- Apply the kernel patch for the AMD64 AGP driver.
- Ensure proper error checking in probe functions.
- Validate driver initialization without hardware.
Public PoC/Exploit Available at Github
CVE-2026-53325 has a 2 public
PoC/Exploit available at Github.
Go to the Public Exploits tab to see the list.
References to Advisories, Solutions, and Tools
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information, practical solutions, and valuable tools related to
CVE-2026-53325.
CWE - Common Weakness Enumeration
While CVE identifies
specific instances of vulnerabilities, CWE categorizes the common flaws or
weaknesses that can lead to vulnerabilities. CVE-2026-53325 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-2026-53325
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).
Record all the bugs discovered by DevGen
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Results are limited to the first 15 repositories due to potential performance issues.
The following list is the news that have been mention
CVE-2026-53325 vulnerability anywhere in the article.
The following table lists the changes that have been made to the
CVE-2026-53325 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.
-
Initial Analysis by [email protected]
Jul. 06, 2026
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 CWE-476 Added CPE Configuration OR *cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* versions from (including) 5.16 up to (excluding) 6.1.177 *cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* versions from (including) 6.2 up to (excluding) 6.6.144 *cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* versions from (including) 6.7 up to (excluding) 6.12.95 *cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* versions from (including) 5.11 up to (excluding) 5.15.211 *cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* versions from (including) 2.6.18 up to (excluding) 5.10.260 *cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* versions from (including) 6.13 up to (excluding) 6.18.37 *cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* versions from (including) 6.19 up to (excluding) 7.0.14 *cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* versions from (including) 7.1 up to (excluding) 7.1.2 Added Reference Type kernel.org: https://git.kernel.org/stable/c/0aa9b27c454c53074cde592eaceb442d30341585 Types: Patch Added Reference Type kernel.org: https://git.kernel.org/stable/c/1d7d45050e14083c1de1460c93f4063c1f0bca7b Types: Patch Added Reference Type kernel.org: https://git.kernel.org/stable/c/3e844a63668d1c3d10a9d347d7ebf161b2f91c84 Types: Patch Added Reference Type kernel.org: https://git.kernel.org/stable/c/53483a9f4ee9eeb18aa866ec16cce79e136987e1 Types: Patch Added Reference Type kernel.org: https://git.kernel.org/stable/c/564b3b3f6565313eb6fa5355ffd037d6fb27897f Types: Patch Added Reference Type kernel.org: https://git.kernel.org/stable/c/b08472db93b1ccff84a7adec5779d47f0e9d3a30 Types: Patch Added Reference Type kernel.org: https://git.kernel.org/stable/c/ce800993af477fc24187349c6a20d3073140b759 Types: Patch Added Reference Type kernel.org: https://git.kernel.org/stable/c/cefe535a60a2e00e09f4b2689b0c8ffc6912459a Types: Patch Added Reference Type kernel.org: https://git.kernel.org/stable/c/eb045714bc6a2bbb0befb7a31b996a196e188869 Types: Patch -
CVE Modified by 416baaa9-dc9f-4396-8d5f-8c081fb06d67
Jul. 04, 2026
Action Type Old Value New Value Added Reference https://git.kernel.org/stable/c/1d7d45050e14083c1de1460c93f4063c1f0bca7b Added Reference https://git.kernel.org/stable/c/3e844a63668d1c3d10a9d347d7ebf161b2f91c84 Added Reference https://git.kernel.org/stable/c/564b3b3f6565313eb6fa5355ffd037d6fb27897f Added Reference https://git.kernel.org/stable/c/ce800993af477fc24187349c6a20d3073140b759 Added Reference https://git.kernel.org/stable/c/eb045714bc6a2bbb0befb7a31b996a196e188869 Changed Affected [{'repo': 'https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git', 'vendor': 'Linux', 'product': 'Linux', 'versions': [{'status': 'affected', 'version': 'a32073bffc656ca4bde6002b6cf7c1a8e0e22712', 'lessThan': '53483a9f4ee9eeb18aa866ec16cce79e136987e1', 'versionType': 'git'}, {'status': 'affected', 'version': 'a32073bffc656ca4bde6002b6cf7c1a8e0e22712', 'lessThan': '0aa9b27c454c53074cde592eaceb442d30341585', 'versionType': 'git'}, {'status': 'affected', 'version': 'a32073bffc656ca4bde6002b6cf7c1a8e0e22712', 'lessThan': 'cefe535a60a2e00e09f4b2689b0c8ffc6912459a', 'versionType': 'git'}, {'status': 'affected', 'version': 'a32073bffc656ca4bde6002b6cf7c1a8e0e22712', 'lessThan': 'b08472db93b1ccff84a7adec5779d47f0e9d3a30', 'versionType': 'git'}], 'programFiles': ['drivers/char/agp/amd64-agp.c'], 'defaultStatus': 'unaffected'}, {'repo': 'https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git', 'vendor': 'Linux', 'product': 'Linux', 'versions': [{'status': 'affected', 'version': '2.6.18'}, {'status': 'unaffected', 'version': '0', 'lessThan': '2.6.18', 'versionType': 'semver'}, {'status': 'unaffected', 'version': '6.18.37', 'versionType': 'semver', 'lessThanOrEqual': '6.18.*'}, {'status': 'unaffected', 'version': '7.0.14', 'versionType': 'semver', 'lessThanOrEqual': '7.0.*'}, {'status': 'unaffected', 'version': '7.1.2', 'versionType': 'semver', 'lessThanOrEqual': '7.1.*'}, {'status': 'unaffected', 'version': '7.2-rc1', 'versionType': 'original_commit_for_fix', 'lessThanOrEqual': '*'}], 'programFiles': ['drivers/char/agp/amd64-agp.c'], 'defaultStatus': 'affected'}] [{'repo': 'https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git', 'vendor': 'Linux', 'product': 'Linux', 'versions': [{'status': 'affected', 'version': 'a32073bffc656ca4bde6002b6cf7c1a8e0e22712', 'lessThan': 'ce800993af477fc24187349c6a20d3073140b759', 'versionType': 'git'}, {'status': 'affected', 'version': 'a32073bffc656ca4bde6002b6cf7c1a8e0e22712', 'lessThan': '1d7d45050e14083c1de1460c93f4063c1f0bca7b', 'versionType': 'git'}, {'status': 'affected', 'version': 'a32073bffc656ca4bde6002b6cf7c1a8e0e22712', 'lessThan': '3e844a63668d1c3d10a9d347d7ebf161b2f91c84', 'versionType': 'git'}, {'status': 'affected', 'version': 'a32073bffc656ca4bde6002b6cf7c1a8e0e22712', 'lessThan': 'eb045714bc6a2bbb0befb7a31b996a196e188869', 'versionType': 'git'}, {'status': 'affected', 'version': 'a32073bffc656ca4bde6002b6cf7c1a8e0e22712', 'lessThan': '564b3b3f6565313eb6fa5355ffd037d6fb27897f', 'versionType': 'git'}, {'status': 'affected', 'version': 'a32073bffc656ca4bde6002b6cf7c1a8e0e22712', 'lessThan': '53483a9f4ee9eeb18aa866ec16cce79e136987e1', 'versionType': 'git'}, {'status': 'affected', 'version': 'a32073bffc656ca4bde6002b6cf7c1a8e0e22712', 'lessThan': '0aa9b27c454c53074cde592eaceb442d30341585', 'versionType': 'git'}, {'status': 'affected', 'version': 'a32073bffc656ca4bde6002b6cf7c1a8e0e22712', 'lessThan': 'cefe535a60a2e00e09f4b2689b0c8ffc6912459a', 'versionType': 'git'}, {'status': 'affected', 'version': 'a32073bffc656ca4bde6002b6cf7c1a8e0e22712', 'lessThan': 'b08472db93b1ccff84a7adec5779d47f0e9d3a30', 'versionType': 'git'}], 'programFiles': ['drivers/char/agp/amd64-agp.c'], 'defaultStatus': 'unaffected'}, {'repo': 'https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git', 'vendor': 'Linux', 'product': 'Linux', 'versions': [{'status': 'affected', 'version': '2.6.18'}, {'status': 'unaffected', 'version': '0', 'lessThan': '2.6.18', 'versionType': 'semver'}, {'status': 'unaffected', 'version': '5.10.260', 'versionType': 'semver', 'lessThanOrEqual': '5.10.*'}, {'status': 'unaffected', 'version': '5.15.211', 'versionType': 'semver', 'lessThanOrEqual': '5.15.*'}, {'status': 'unaffected', 'version': '6.1.177', 'versionType': 'semver', 'lessThanOrEqual': '6.1.*'}, {'status': 'unaffected', 'version': '6.6.144', 'versionType': 'semver', 'lessThanOrEqual': '6.6.*'}, {'status': 'unaffected', 'version': '6.12.95', 'versionType': 'semver', 'lessThanOrEqual': '6.12.*'}, {'status': 'unaffected', 'version': '6.18.37', 'versionType': 'semver', 'lessThanOrEqual': '6.18.*'}, {'status': 'unaffected', 'version': '7.0.14', 'versionType': 'semver', 'lessThanOrEqual': '7.0.*'}, {'status': 'unaffected', 'version': '7.1.2', 'versionType': 'semver', 'lessThanOrEqual': '7.1.*'}, {'status': 'unaffected', 'version': '7.2-rc1', 'versionType': 'original_commit_for_fix', 'lessThanOrEqual': '*'}], 'programFiles': ['drivers/char/agp/amd64-agp.c'], 'defaultStatus': 'affected'}] -
New CVE Received by 416baaa9-dc9f-4396-8d5f-8c081fb06d67
Jun. 29, 2026
Action Type Old Value New Value Added Affected [{'repo': 'https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git', 'vendor': 'Linux', 'product': 'Linux', 'versions': [{'status': 'affected', 'version': 'a32073bffc656ca4bde6002b6cf7c1a8e0e22712', 'lessThan': '53483a9f4ee9eeb18aa866ec16cce79e136987e1', 'versionType': 'git'}, {'status': 'affected', 'version': 'a32073bffc656ca4bde6002b6cf7c1a8e0e22712', 'lessThan': '0aa9b27c454c53074cde592eaceb442d30341585', 'versionType': 'git'}, {'status': 'affected', 'version': 'a32073bffc656ca4bde6002b6cf7c1a8e0e22712', 'lessThan': 'cefe535a60a2e00e09f4b2689b0c8ffc6912459a', 'versionType': 'git'}, {'status': 'affected', 'version': 'a32073bffc656ca4bde6002b6cf7c1a8e0e22712', 'lessThan': 'b08472db93b1ccff84a7adec5779d47f0e9d3a30', 'versionType': 'git'}], 'programFiles': ['drivers/char/agp/amd64-agp.c'], 'defaultStatus': 'unaffected'}, {'repo': 'https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git', 'vendor': 'Linux', 'product': 'Linux', 'versions': [{'status': 'affected', 'version': '2.6.18'}, {'status': 'unaffected', 'version': '0', 'lessThan': '2.6.18', 'versionType': 'semver'}, {'status': 'unaffected', 'version': '6.18.37', 'versionType': 'semver', 'lessThanOrEqual': '6.18.*'}, {'status': 'unaffected', 'version': '7.0.14', 'versionType': 'semver', 'lessThanOrEqual': '7.0.*'}, {'status': 'unaffected', 'version': '7.1.2', 'versionType': 'semver', 'lessThanOrEqual': '7.1.*'}, {'status': 'unaffected', 'version': '7.2-rc1', 'versionType': 'original_commit_for_fix', 'lessThanOrEqual': '*'}], 'programFiles': ['drivers/char/agp/amd64-agp.c'], 'defaultStatus': 'affected'}] Added Description In the Linux kernel, the following vulnerability has been resolved: agp/amd64: Fix broken error propagation in agp_amd64_probe() A NULL pointer dereference was observed in the AMD64 AGP driver when running in a virtualized environment (e.g. qemu/kvm) without a physical AMD northbridge. The crash occurs in amd64_fetch_size() when attempting to dereference the pointer returned by node_to_amd_nb(0). The root cause of this crash is broken error propagation in agp_amd64_probe(): When no AMD northbridges are found, cache_nbs() correctly returns -ENODEV. However, the probe function erroneously checks the return value against exactly -1, rather than < 0. As a result, the hardware absence error is masked, allowing the driver to improperly proceed with initialization. It eventually calls agp_add_bridge(), which invokes amd64_fetch_size(). Since the hardware does not exist, node_to_amd_nb(0) returns NULL, leading to a General Protection Fault (GPF) when accessing its ->misc member. Fix the issue by correcting the error check in agp_amd64_probe() to abort properly when cache_nbs() returns any negative error code. This prevents the driver from erroneously proceeding without hardware, thereby avoiding the subsequent NULL pointer dereference at its source. Added Reference https://git.kernel.org/stable/c/0aa9b27c454c53074cde592eaceb442d30341585 Added Reference https://git.kernel.org/stable/c/53483a9f4ee9eeb18aa866ec16cce79e136987e1 Added Reference https://git.kernel.org/stable/c/b08472db93b1ccff84a7adec5779d47f0e9d3a30 Added Reference https://git.kernel.org/stable/c/cefe535a60a2e00e09f4b2689b0c8ffc6912459a