CVE-2023-53646

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There is no network-facing path to i915 perf configuration.\nAC:L - A single ioctl carrying any 32-bit register address outside the two in-bounds ranges deterministically drives the sentinel-less loop past the end of the 16-byte array; no race, timing, or memory-layout luck is needed to trigger the out-of-bounds access.\nPR:L - The ioctl is DRM_RENDER_ALLOW, so no DRM master or authentication is required \u2014 only an open render node, which is group/world accessible on typical desktop, Android and container deployments. On the widely used profiling configuration dev.i915.perf_stream_paranoid=0 (the documented setting for unprivileged Intel GPU metrics collection) the perfmon_capable() check is bypassed entirely, leaving an ordinary unprivileged user able to reach the bug.\nUI:N - The attacker triggers the flaw entirely on their own by issuing the ioctl from their own process; no victim action, file open, or mount is involved.\nS:U - The out-of-bounds read and the resulting register-allowlist bypass occur within the kernel's own security authority on the same host; no VM, IOMMU, or sandbox boundary is crossed.\nC:H - The walk reads kernel module .rodata past the object bounds with no bound other than encountering a zero pair, and the function's boolean result is returned to userspace as an accept/reject oracle, letting an attacker probe addresses and reconstruct the contents of the out-of-bounds kernel memory.\nI:H - The OOB data is interpreted as additional whitelist ranges, so registers that were never meant to be programmable are accepted and then emitted as MI_LOAD_REGISTER_IMM in a kernel-built batch executed unfiltered by the GPU command streamer, giving attacker-controlled 32-bit writes to non-whitelisted GPU MMIO and defeating the very allowlist this code enforces.\nA:H - The unterminated walk can run into unmapped module memory and oops, and it reliably panics kernels built with KASAN (the reported crash signature) or configured with kasan.fault=panic/panic_on_warn; additionally, programming out-of-allowlist GPU registers can hang or wedge the GPU for all users."}]}], "affected": [{"product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["drivers/gpu/drm/i915/i915_perf.c"], "versions": [{"version": "0fa9349dda030fa847b36f880a5eea25c3202b66", "lessThan": "21d92025e80629fd5c25cd6751f8cf38c784dd4a", "status": "affected", "versionType": "git"}, {"version": "0fa9349dda030fa847b36f880a5eea25c3202b66", "lessThan": "785b3f667b4bf98804cad135005e964df0c750de", "status": "affected", "versionType": "git"}]}, {"product": "Linux", "vendor": "Linux", "defaultStatus": "affected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["drivers/gpu/drm/i915/i915_perf.c"], "versions": [{"version": "6.2", "status": "affected"}, {"version": "0", "lessThan": "6.2", "status": "unaffected", "versionType": "semver"}, {"version": "6.4.7", "lessThanOrEqual": "6.4.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.5", "lessThanOrEqual": "*", "status": "unaffected", "versionType": "original_commit_for_fix"}]}], "cpeApplicability": [{"nodes": [{"operator": "OR", "negate": false, "cpeMatch": [{"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.2", "versionEndExcluding": "6.4.7"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.2", "versionEndExcluding": "6.5"}]}]}], "references": [{"url": "https://git.kernel.org/stable/c/21d92025e80629fd5c25cd6751f8cf38c784dd4a"}, {"url": "https://git.kernel.org/stable/c/785b3f667b4bf98804cad135005e964df0c750de"}], "title": "drm/i915/perf: add sentinel to xehp_oa_b_counters", "x_generator": {"engine": "bippy-1.2.0"}}}}

{}

{"affected": [{"affectedData": [{"defaultStatus": "unaffected", "product": "Linux", "programFiles": ["drivers/gpu/drm/i915/i915_perf.c"], "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "versions": [{"lessThan": "21d92025e80629fd5c25cd6751f8cf38c784dd4a", "status": "affected", "version": "0fa9349dda030fa847b36f880a5eea25c3202b66", "versionType": "git"}, {"lessThan": "785b3f667b4bf98804cad135005e964df0c750de", "status": "affected", "version": "0fa9349dda030fa847b36f880a5eea25c3202b66", "versionType": "git"}]}, {"defaultStatus": "affected", "product": "Linux", "programFiles": ["drivers/gpu/drm/i915/i915_perf.c"], "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "versions": [{"status": "affected", "version": "6.2"}, {"lessThan": "6.2", "status": "unaffected", "version": "0", "versionType": "semver"}, {"lessThanOrEqual": "6.4.*", "status": "unaffected", "version": "6.4.7", "versionType": "semver"}, {"lessThanOrEqual": "*", "status": "unaffected", "version": "6.5", "versionType": "original_commit_for_fix"}]}], "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}], "configurations": [{"nodes": [{"cpeMatch": [{"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "matchCriteriaId": "60A1A1ED-EA6C-42F6-80D3-3316DC7608C7", "versionEndExcluding": "6.4.7", "versionStartIncluding": "6.2", "vulnerable": true}, {"criteria": "cpe:2.3:o:linux:linux_kernel:6.5:rc1:*:*:*:*:*:*", "matchCriteriaId": "0B3E6E4D-E24E-4630-B00C-8C9901C597B0", "vulnerable": true}, {"criteria": "cpe:2.3:o:linux:linux_kernel:6.5:rc2:*:*:*:*:*:*", "matchCriteriaId": "E4A01A71-0F09-4DB2-A02F-7EFFBE27C98D", "vulnerable": true}], "negate": false, "operator": "OR"}]}], "cveTags": [], "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\ndrm/i915/perf: add sentinel to xehp_oa_b_counters\n\nArrays passed to reg_in_range_table should end with empty record.\n\nThe patch solves KASAN detected bug with signature:\nBUG: KASAN: global-out-of-bounds in xehp_is_valid_b_counter_addr+0x2c7/0x350 [i915]\nRead of size 4 at addr ffffffffa1555d90 by task perf/1518\n\nCPU: 4 PID: 1518 Comm: perf Tainted: G U 6.4.0-kasan_438-g3303d06107f3+ #1\nHardware name: Intel Corporation Meteor Lake Client Platform/MTL-P DDR5 SODIMM SBS RVP, BIOS MTLPFWI1.R00.3223.D80.2305311348 05/31/2023\nCall Trace:\n<TASK>\n...\nxehp_is_valid_b_counter_addr+0x2c7/0x350 [i915]\n\n(cherry picked from commit 2f42c5afb34b5696cf5fe79e744f99be9b218798)"}], "id": "CVE-2023-53646", "lastModified": "2026-08-04T10:19:16.313", "metrics": {"cvssMetricV31": [{"cvssData": {"attackComplexity": "LOW", "attackVector": "LOCAL", "availabilityImpact": "HIGH", "baseScore": 7.8, "baseSeverity": "HIGH", "confidentialityImpact": "HIGH", "integrityImpact": "HIGH", "privilegesRequired": "LOW", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H", "version": "3.1"}, "exploitabilityScore": 1.8, "impactScore": 5.9, "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "type": "Secondary"}, {"cvssData": {"attackComplexity": "LOW", "attackVector": "LOCAL", "availabilityImpact": "HIGH", "baseScore": 7.1, "baseSeverity": "HIGH", "confidentialityImpact": "HIGH", "integrityImpact": "NONE", "privilegesRequired": "LOW", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:H", "version": "3.1"}, "exploitabilityScore": 1.8, "impactScore": 5.2, "source": "nvd@nist.gov", "type": "Primary"}]}, "published": "2025-10-07T16:15:48.017", "references": [{"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/21d92025e80629fd5c25cd6751f8cf38c784dd4a"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/785b3f667b4bf98804cad135005e964df0c750de"}], "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "vulnStatus": "Modified", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-125"}], "source": "nvd@nist.gov", "type": "Primary"}]}

{"bugzilla": {"description": "kernel: drm/i915/perf: add sentinel to xehp_oa_b_counters", "id": "2402234", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2402234"}, "csaw": false, "cvss3": {"cvss3_base_score": "7.0", "cvss3_scoring_vector": "CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H", "status": "draft"}, "details": ["No description is available for this CVE."], "name": "CVE-2023-53646", "package_state": [{"cpe": "cpe:/o:redhat:enterprise_linux:10", "fix_state": "Not affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 10"}, {"cpe": "cpe:/o:redhat:enterprise_linux:6", "fix_state": "Not affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 6"}, {"cpe": "cpe:/o:redhat:enterprise_linux:7", "fix_state": "Not affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 7"}, {"cpe": "cpe:/o:redhat:enterprise_linux:7", "fix_state": "Not affected", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 7"}, {"cpe": "cpe:/o:redhat:enterprise_linux:8", "fix_state": "Affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:8", "fix_state": "Affected", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 9"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Affected", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 9"}, {"cpe": "cpe:/o:redhat:rhivos:1", "fix_state": "Not affected", "package_name": "kernel", "product_name": "Red Hat In-Vehicle Operating System 1"}], "public_date": "2025-10-07T00:00:00Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2023-53646\nhttps://nvd.nist.gov/vuln/detail/CVE-2023-53646\nhttps://lore.kernel.org/linux-cve-announce/2025100717-CVE-2023-53646-c40e@gregkh/T"], "threat_severity": "Moderate"}

{"created": "2025-10-08T13:36:49.427421+00:00", "updated": "2025-10-08T13:36:49.427447+00:00", "vendors": ["linux", "linux$PRODUCT$linux_kernel"]}