{"api_version":"1","generated_at":"2026-06-30T18:52:25+00:00","cve":"CVE-2026-53325","urls":{"html":"https://cve.report/CVE-2026-53325","api":"https://cve.report/api/cve/CVE-2026-53325.json","docs":"https://cve.report/api","cve_org":"https://www.cve.org/CVERecord?id=CVE-2026-53325","nvd":"https://nvd.nist.gov/vuln/detail/CVE-2026-53325"},"summary":{"title":"agp/amd64: Fix broken error propagation in agp_amd64_probe()","description":"In the Linux kernel, the following vulnerability has been resolved:\n\nagp/amd64: Fix broken error propagation in agp_amd64_probe()\n\nA NULL pointer dereference was observed in the AMD64 AGP driver when\nrunning in a virtualized environment (e.g. qemu/kvm) without a physical\nAMD northbridge. The crash occurs in amd64_fetch_size() when attempting\nto dereference the pointer returned by node_to_amd_nb(0).\n\nThe root cause of this crash is broken error propagation in\nagp_amd64_probe(): When no AMD northbridges are found, cache_nbs()\ncorrectly returns -ENODEV. However, the probe function erroneously\nchecks the return value against exactly -1, rather than < 0.\n\nAs a result, the hardware absence error is masked, allowing the driver\nto improperly proceed with initialization. It eventually calls\nagp_add_bridge(), which invokes amd64_fetch_size(). Since the hardware\ndoes not exist, node_to_amd_nb(0) returns NULL, leading to a General\nProtection Fault (GPF) when accessing its ->misc member.\n\nFix the issue by correcting the error check in agp_amd64_probe() to\nabort properly when cache_nbs() returns any negative error code. This\nprevents the driver from erroneously proceeding without hardware, thereby\navoiding the subsequent NULL pointer dereference at its source.","state":"PUBLISHED","assigner":"Linux","published_at":"2026-06-29 06:16:33","updated_at":"2026-06-30 14:44:27"},"problem_types":[],"metrics":[],"references":[{"url":"https://git.kernel.org/stable/c/53483a9f4ee9eeb18aa866ec16cce79e136987e1","name":"https://git.kernel.org/stable/c/53483a9f4ee9eeb18aa866ec16cce79e136987e1","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/b08472db93b1ccff84a7adec5779d47f0e9d3a30","name":"https://git.kernel.org/stable/c/b08472db93b1ccff84a7adec5779d47f0e9d3a30","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/0aa9b27c454c53074cde592eaceb442d30341585","name":"https://git.kernel.org/stable/c/0aa9b27c454c53074cde592eaceb442d30341585","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/cefe535a60a2e00e09f4b2689b0c8ffc6912459a","name":"https://git.kernel.org/stable/c/cefe535a60a2e00e09f4b2689b0c8ffc6912459a","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://www.cve.org/CVERecord?id=CVE-2026-53325","name":"CVE Program record","refsource":"CVE.ORG","tags":["canonical"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-53325","name":"NVD vulnerability detail","refsource":"NVD","tags":["canonical","analysis"]}],"affected":[{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected a32073bffc656ca4bde6002b6cf7c1a8e0e22712 53483a9f4ee9eeb18aa866ec16cce79e136987e1 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected a32073bffc656ca4bde6002b6cf7c1a8e0e22712 0aa9b27c454c53074cde592eaceb442d30341585 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected a32073bffc656ca4bde6002b6cf7c1a8e0e22712 cefe535a60a2e00e09f4b2689b0c8ffc6912459a git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected a32073bffc656ca4bde6002b6cf7c1a8e0e22712 b08472db93b1ccff84a7adec5779d47f0e9d3a30 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 2.6.18","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 2.6.18 semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 6.18.37 6.18.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 7.0.14 7.0.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 7.1.2 7.1.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 7.2-rc1 * original_commit_for_fix","platforms":[]}],"timeline":[],"solutions":[],"workarounds":[],"exploits":[],"credits":[],"nvd_cpes":[],"vendor_comments":[],"enrichments":{"kev":null,"epss":{"cve_year":"2026","cve_id":"53325","cve":"CVE-2026-53325","epss":"0.001750000","percentile":"0.071840000","score_date":"2026-06-29","updated_at":"2026-06-30 00:06:51"},"legacy_qids":[]},"source_records":{"cve_program":{"containers":{"cna":{"affected":[{"defaultStatus":"unaffected","product":"Linux","programFiles":["drivers/char/agp/amd64-agp.c"],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","vendor":"Linux","versions":[{"lessThan":"53483a9f4ee9eeb18aa866ec16cce79e136987e1","status":"affected","version":"a32073bffc656ca4bde6002b6cf7c1a8e0e22712","versionType":"git"},{"lessThan":"0aa9b27c454c53074cde592eaceb442d30341585","status":"affected","version":"a32073bffc656ca4bde6002b6cf7c1a8e0e22712","versionType":"git"},{"lessThan":"cefe535a60a2e00e09f4b2689b0c8ffc6912459a","status":"affected","version":"a32073bffc656ca4bde6002b6cf7c1a8e0e22712","versionType":"git"},{"lessThan":"b08472db93b1ccff84a7adec5779d47f0e9d3a30","status":"affected","version":"a32073bffc656ca4bde6002b6cf7c1a8e0e22712","versionType":"git"}]},{"defaultStatus":"affected","product":"Linux","programFiles":["drivers/char/agp/amd64-agp.c"],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","vendor":"Linux","versions":[{"status":"affected","version":"2.6.18"},{"lessThan":"2.6.18","status":"unaffected","version":"0","versionType":"semver"},{"lessThanOrEqual":"6.18.*","status":"unaffected","version":"6.18.37","versionType":"semver"},{"lessThanOrEqual":"7.0.*","status":"unaffected","version":"7.0.14","versionType":"semver"},{"lessThanOrEqual":"7.1.*","status":"unaffected","version":"7.1.2","versionType":"semver"},{"lessThanOrEqual":"*","status":"unaffected","version":"7.2-rc1","versionType":"original_commit_for_fix"}]}],"cpeApplicability":[{"nodes":[{"cpeMatch":[{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"6.18.37","versionStartIncluding":"2.6.18","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"7.0.14","versionStartIncluding":"2.6.18","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"7.1.2","versionStartIncluding":"2.6.18","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"7.2-rc1","versionStartIncluding":"2.6.18","vulnerable":true}],"negate":false,"operator":"OR"}]}],"descriptions":[{"lang":"en","value":"In the Linux kernel, the following vulnerability has been resolved:\n\nagp/amd64: Fix broken error propagation in agp_amd64_probe()\n\nA NULL pointer dereference was observed in the AMD64 AGP driver when\nrunning in a virtualized environment (e.g. qemu/kvm) without a physical\nAMD northbridge. The crash occurs in amd64_fetch_size() when attempting\nto dereference the pointer returned by node_to_amd_nb(0).\n\nThe root cause of this crash is broken error propagation in\nagp_amd64_probe(): When no AMD northbridges are found, cache_nbs()\ncorrectly returns -ENODEV. However, the probe function erroneously\nchecks the return value against exactly -1, rather than < 0.\n\nAs a result, the hardware absence error is masked, allowing the driver\nto improperly proceed with initialization. It eventually calls\nagp_add_bridge(), which invokes amd64_fetch_size(). Since the hardware\ndoes not exist, node_to_amd_nb(0) returns NULL, leading to a General\nProtection Fault (GPF) when accessing its ->misc member.\n\nFix the issue by correcting the error check in agp_amd64_probe() to\nabort properly when cache_nbs() returns any negative error code. This\nprevents the driver from erroneously proceeding without hardware, thereby\navoiding the subsequent NULL pointer dereference at its source."}],"providerMetadata":{"dateUpdated":"2026-06-29T04:53:35.833Z","orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","shortName":"Linux"},"references":[{"url":"https://git.kernel.org/stable/c/53483a9f4ee9eeb18aa866ec16cce79e136987e1"},{"url":"https://git.kernel.org/stable/c/0aa9b27c454c53074cde592eaceb442d30341585"},{"url":"https://git.kernel.org/stable/c/cefe535a60a2e00e09f4b2689b0c8ffc6912459a"},{"url":"https://git.kernel.org/stable/c/b08472db93b1ccff84a7adec5779d47f0e9d3a30"}],"title":"agp/amd64: Fix broken error propagation in agp_amd64_probe()","x_generator":{"engine":"bippy-1.2.0"}}},"cveMetadata":{"assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","assignerShortName":"Linux","cveId":"CVE-2026-53325","datePublished":"2026-06-29T04:53:35.833Z","dateReserved":"2026-06-09T07:44:35.398Z","dateUpdated":"2026-06-29T04:53:35.833Z","state":"PUBLISHED"},"dataType":"CVE_RECORD","dataVersion":"5.2"},"nvd":{"publishedDate":"2026-06-29 06:16:33","lastModifiedDate":"2026-06-30 14:44:27","problem_types":[],"metrics":[],"configurations":[]},"legacy_mitre":{"record":{"CveYear":"2026","CveId":"53325","Ordinal":"1","Title":"agp/amd64: Fix broken error propagation in agp_amd64_probe()","CVE":"CVE-2026-53325","Year":"2026"},"notes":[{"CveYear":"2026","CveId":"53325","Ordinal":"1","NoteData":"In the Linux kernel, the following vulnerability has been resolved:\n\nagp/amd64: Fix broken error propagation in agp_amd64_probe()\n\nA NULL pointer dereference was observed in the AMD64 AGP driver when\nrunning in a virtualized environment (e.g. qemu/kvm) without a physical\nAMD northbridge. The crash occurs in amd64_fetch_size() when attempting\nto dereference the pointer returned by node_to_amd_nb(0).\n\nThe root cause of this crash is broken error propagation in\nagp_amd64_probe(): When no AMD northbridges are found, cache_nbs()\ncorrectly returns -ENODEV. However, the probe function erroneously\nchecks the return value against exactly -1, rather than < 0.\n\nAs a result, the hardware absence error is masked, allowing the driver\nto improperly proceed with initialization. It eventually calls\nagp_add_bridge(), which invokes amd64_fetch_size(). Since the hardware\ndoes not exist, node_to_amd_nb(0) returns NULL, leading to a General\nProtection Fault (GPF) when accessing its ->misc member.\n\nFix the issue by correcting the error check in agp_amd64_probe() to\nabort properly when cache_nbs() returns any negative error code. This\nprevents the driver from erroneously proceeding without hardware, thereby\navoiding the subsequent NULL pointer dereference at its source.","Type":"Description","Title":"agp/amd64: Fix broken error propagation in agp_amd64_probe()"}]}}}