{ "document":{ "aggregate_severity":{ "namespace":"https://nvd.nist.gov/vuln-metrics/cvss", "text":"MEDIUM" }, "category":"csaf_vex", "csaf_version":"2.0", "distribution":{ "tlp":{ "label":"WHITE", "url":"https:/www.first.org/tlp/" } }, "lang":"en", "notes":[ { "text":"In the Linux kernel, the following vulnerability has been resolved:\n\ndrm/amdgpu: fix NULL pointer dereference in amdgpu_gmc_filter_faults_remove\n\nOn APUs such as Raven and Renoir (GC 9.1.0, 9.2.2, 9.3.0), the ih1 and\nih2 interrupt ring buffers are not initialized. This is by design, as\nthese secondary IH rings are only available on discrete GPUs. See\nvega10_ih_sw_init() which explicitly skips ih1/ih2 initialization when\nAMD_IS_APU is set.\n\nHowever, amdgpu_gmc_filter_faults_remove() unconditionally uses ih1 to\nget the timestamp of the last interrupt entry. When retry faults are\nenabled on APUs (noretry=0), this function is called from the SVM page\nfault recovery path, resulting in a NULL pointer dereference when\namdgpu_ih_decode_iv_ts_helper() attempts to access ih->ring[].\n\nThe crash manifests as:\n\n BUG: kernel NULL pointer dereference, address: 0000000000000004\n RIP: 0010:amdgpu_ih_decode_iv_ts_helper+0x22/0x40 [amdgpu]\n Call Trace:\n amdgpu_gmc_filter_faults_remove+0x60/0x130 [amdgpu]\n svm_range_restore_pages+0xae5/0x11c0 [amdgpu]\n amdgpu_vm_handle_fault+0xc8/0x340 [amdgpu]\n gmc_v9_0_process_interrupt+0x191/0x220 [amdgpu]\n amdgpu_irq_dispatch+0xed/0x2c0 [amdgpu]\n amdgpu_ih_process+0x84/0x100 [amdgpu]\n\nThis issue was exposed by commit 1446226d32a4 (\"drm/amdgpu: Remove GC HW\nIP 9.3.0 from noretry=1\") which changed the default for Renoir APU from\nnoretry=1 to noretry=0, enabling retry fault handling and thus\nexercising the buggy code path.\n\nFix this by adding a check for ih1.ring_size before attempting to use\nit. Also restore the soft_ih support from commit dd299441654f (\"drm/amdgpu:\nRework retry fault removal\"). This is needed if the hardware doesn't\nsupport secondary HW IH rings.\n\nv2: additional updates (Alex)\n\n(cherry picked from commit 6ce8d536c80aa1f059e82184f0d1994436b1d526)", "category":"general", "title":"Synopsis" } ], "publisher":null, "references":[ { "summary":"nvd cve", "category":"external", "url":"https://nvd.nist.gov/vuln/detail/CVE-2026-23163" }, { "summary":"CVE-2026-23163 vex file", "category":"self", "url":"https://repo.openeuler.org/security/data/csaf/cve/2026/csaf-openeuler-cve-2026-23163.json" }, { "summary":"openEuler-SA-2026-1570", "category":"self", "url":"https://www.openeuler.org/zh/security/security-bulletins/detail/?id=openEuler-SA-2026-1570" }, { "summary":"CVE-2026-23163", "category":"self", "url":"https://www.openeuler.org/en/security/cve/detail/?cveId=CVE-2026-23163&packageName=kernel" } ], "title":"openEuler cve CVE-2026-23163", "tracking":{ "initial_release_date":"2026-03-17T09:39:50+08:00", "revision_history":[ { "date":"2026-03-17T09:39:50+08:00", "summary":"Initial", "number":"1.0.0" } ], "generator":{ "date":"2026-03-17T09:39:50+08:00", "engine":{ "name":"openEuler CSAF Tool V1.0" } }, "current_release_date":"2026-03-17T09:39:50+08:00", "id":"CVE-2026-23163", "version":"1.0.0", "status":"interim" } }, "product_tree":{ "branches":[ { "name":"openEuler", "category":"vendor", "branches":[ { "name":"openEuler", "branches":[ { "product":{ "product_identification_helper":{ "cpe":"cpe:/a:openEuler:openEuler:24.03-LTS" }, "product_id":"openEuler-24.03-LTS", "name":"openEuler-24.03-LTS" }, "name":"openEuler-24.03-LTS", "category":"product_version" } ], "category":"product_name" }, { "name":"aarch64", "branches":[ { "product":{ "product_identification_helper":{ "cpe":"cpe:/a:openEuler:openEuler:24.03-LTS" }, "product_id":"bpftool-6.6.0-142.0.0.124.oe2403.aarch64.rpm", "name":"bpftool-6.6.0-142.0.0.124.oe2403.aarch64.rpm" }, "name":"bpftool-6.6.0-142.0.0.124.oe2403.aarch64.rpm", "category":"product_version" }, { "product":{ 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as Raven and Renoir (GC 9.1.0, 9.2.2, 9.3.0), the ih1 and\nih2 interrupt ring buffers are not initialized. This is by design, as\nthese secondary IH rings are only available on discrete GPUs. See\nvega10_ih_sw_init() which explicitly skips ih1/ih2 initialization when\nAMD_IS_APU is set.\n\nHowever, amdgpu_gmc_filter_faults_remove() unconditionally uses ih1 to\nget the timestamp of the last interrupt entry. When retry faults are\nenabled on APUs (noretry=0), this function is called from the SVM page\nfault recovery path, resulting in a NULL pointer dereference when\namdgpu_ih_decode_iv_ts_helper() attempts to access ih->ring[].\n\nThe crash manifests as:\n\n BUG: kernel NULL pointer dereference, address: 0000000000000004\n RIP: 0010:amdgpu_ih_decode_iv_ts_helper+0x22/0x40 [amdgpu]\n Call Trace:\n amdgpu_gmc_filter_faults_remove+0x60/0x130 [amdgpu]\n svm_range_restore_pages+0xae5/0x11c0 [amdgpu]\n amdgpu_vm_handle_fault+0xc8/0x340 [amdgpu]\n gmc_v9_0_process_interrupt+0x191/0x220 [amdgpu]\n amdgpu_irq_dispatch+0xed/0x2c0 [amdgpu]\n amdgpu_ih_process+0x84/0x100 [amdgpu]\n\nThis issue was exposed by commit 1446226d32a4 (\"drm/amdgpu: Remove GC HW\nIP 9.3.0 from noretry=1\") which changed the default for Renoir APU from\nnoretry=1 to noretry=0, enabling retry fault handling and thus\nexercising the buggy code path.\n\nFix this by adding a check for ih1.ring_size before attempting to use\nit. Also restore the soft_ih support from commit dd299441654f (\"drm/amdgpu:\nRework retry fault removal\"). This is needed if the hardware doesn't\nsupport secondary HW IH rings.\n\nv2: additional updates (Alex)\n\n(cherry picked from commit 6ce8d536c80aa1f059e82184f0d1994436b1d526)", "category":"description", "title":"Vulnerability Description" } ], "product_status":{ "fixed":{ "$ref":"$.vulnerabilities[0].product_status.fixed" } }, "remediations":[ { "product_ids":{ "$ref":"$.vulnerabilities[0].product_status.fixed" }, "details":"kernel security update", "category":"vendor_fix", "url":"https://www.openeuler.org/zh/security/security-bulletins/detail/?id=openEuler-SA-2026-1570" } ], "scores":[ { "cvss_v3":{ "baseSeverity":"MEDIUM", "baseScore":4.4, "vectorString":"CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:N/I:N/A:H", "version":"3.1" }, "products":{ "$ref":"$.vulnerabilities[0].product_status.fixed" } } ], "threats":[ { "details":"Medium", "category":"impact" } ], "title":"CVE-2026-23163" } ] }