{ "dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": { "cveId": "CVE-2023-53753", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2025-12-08T01:18:04.279Z", "datePublished": "2025-12-08T01:19:13.743Z", "dateUpdated": "2026-08-05T09:15:50.057Z" }, "containers": { "cna": { "providerMetadata": { "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-08-05T09:15:50.057Z" }, "descriptions": [ { "lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\ndrm/amd/display: fix mapping to non-allocated address\n\n[Why]\nThere is an issue mapping non-allocated location of memory.\nIt would allocate gpio registers from an array out of bounds.\n\n[How]\nPatch correct numbers of bounds for using." } ], "metrics": [ { "cvssV3_1": { "version": "3.1", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H", "baseScore": 7.8, "baseSeverity": "HIGH" }, "scenarios": [ { "lang": "en", "value": "AV:L - The amdgpu/DC display stack is a local device driver; the out-of-bounds indexing is reached through driver initialization and DDC/I2C transactions driven by local DRM ioctls on /dev/dri/card* (forced connector probe → drm_get_edid → dc_submit_i2c → dal_ddc_open → define_ddc_registers). There is no network-facing path to this code.\nAC:L - On an affected DCN2/DCN3/DCN3.2 board whose VBIOS maps a DDC/OEM-I2C line to the DC_GPIO_DDCVGA_A pad, en==GPIO_DDC_LINE_DDC_VGA is produced deterministically and the &ddc_shift[6]/&ddc_mask[6] overread happens on every gpio open — no race, no memory-layout grooming, and the attacker can repeat connector probes at will.\nPR:L - An unprivileged local user with a normal DRM/render node handle (video/render group, granted to the active logind session on desktops and to app processes on Android) can force connector detection and EDID/I2C traffic over the affected DDC line; no CAP_SYS_ADMIN or root is required.\nUI:N - The vulnerable path is entered by the driver itself at resource-pool/link init and by any programmatic connector probe or i2c transfer; no victim action such as plugging a monitor or opening a file is needed.\nS:U - The out-of-bounds access and its effects are entirely within the kernel's own security authority (kernel .rodata read plus GPU register programming by the same driver); no VM, IOMMU, or sandbox boundary is crossed.\nC:H - This is an out-of-bounds read of 40 bytes of kernel .rodata beyond the end of ddc_shift[]/ddc_mask[] — well past a \"few bytes\" — and the leaked adjacent kernel constants are consumed as bitfield descriptors whose effect on the GPIO/I2C register state is observable to the caller performing DDC transactions.\nI:H - The out-of-bounds-derived shift and mask values are fed directly into REG_SET/REG_UPDATE read-modify-write sequences against the GPU's DDC GPIO MASK register, so arbitrary unintended bits of live hardware control registers are overwritten with values the driver never validated.\nA:H - Misprogramming the DDC/I2C pad control bits wedges display detection and I2C on that line, and the global-out-of-bounds access plus the resulting out-of-range shift counts trigger KASAN/UBSAN reports that panic the kernel under panic_on_warn, which is standard on hardened and Android builds." } ] } ], "affected": [ { "product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": [ "drivers/gpu/drm/amd/display/dc/gpio/dcn20/hw_factory_dcn20.c", "drivers/gpu/drm/amd/display/dc/gpio/dcn30/hw_factory_dcn30.c", "drivers/gpu/drm/amd/display/dc/gpio/dcn32/hw_factory_dcn32.c", "drivers/gpu/drm/amd/display/dc/gpio/ddc_regs.h" ], "versions": [ { "version": "4562236b3bc0a28aeb6ee93b2d8a849a4c4e1c7c", "lessThan": "8ce8a443ddd9002861a4ee8a7e33a0c02717422f", "status": "affected", "versionType": "git" }, { "version": "4562236b3bc0a28aeb6ee93b2d8a849a4c4e1c7c", "lessThan": "24aaf6603600d6d1159973c809ea2737664b28c4", "status": "affected", "versionType": "git" }, { "version": "4562236b3bc0a28aeb6ee93b2d8a849a4c4e1c7c", "lessThan": "9190d4a263264eabf715f5fc1827da45e3fdc247", "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/amd/display/dc/gpio/dcn20/hw_factory_dcn20.c", "drivers/gpu/drm/amd/display/dc/gpio/dcn30/hw_factory_dcn30.c", "drivers/gpu/drm/amd/display/dc/gpio/dcn32/hw_factory_dcn32.c", "drivers/gpu/drm/amd/display/dc/gpio/ddc_regs.h" ], "versions": [ { "version": "4.15", "status": "affected" }, { "version": "0", "lessThan": "4.15", "status": "unaffected", "versionType": "semver" }, { "version": "6.1.16", "lessThanOrEqual": "6.1.*", "status": "unaffected", "versionType": "semver" }, { "version": "6.2.3", "lessThanOrEqual": "6.2.*", "status": "unaffected", "versionType": "semver" }, { "version": "6.3", "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": "4.15", "versionEndExcluding": "6.1.16" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.15", "versionEndExcluding": "6.2.3" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.15", "versionEndExcluding": "6.3" } ] } ] } ], "references": [ { "url": "https://git.kernel.org/stable/c/8ce8a443ddd9002861a4ee8a7e33a0c02717422f" }, { "url": "https://git.kernel.org/stable/c/24aaf6603600d6d1159973c809ea2737664b28c4" }, { "url": "https://git.kernel.org/stable/c/9190d4a263264eabf715f5fc1827da45e3fdc247" } ], "title": "drm/amd/display: fix mapping to non-allocated address", "x_generator": { "engine": "bippy-1.2.0" } } } }