335 lines
17 KiB
JSON
335 lines
17 KiB
JSON
{
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"dataType": "CVE_RECORD",
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"cveMetadata": {
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"cveId": "CVE-2024-27045",
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"assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
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"state": "PUBLISHED",
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"assignerShortName": "Linux",
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"dateReserved": "2024-02-19T14:20:24.213Z",
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"datePublished": "2024-05-01T12:54:18.138Z",
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"dateUpdated": "2026-08-05T11:29:12.070Z"
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},
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"containers": {
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"cna": {
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"providerMetadata": {
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"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
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"shortName": "Linux",
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"dateUpdated": "2026-08-05T11:29:12.070Z"
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},
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"descriptions": [
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{
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"lang": "en",
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"value": "In the Linux kernel, the following vulnerability has been resolved:\n\ndrm/amd/display: Fix a potential buffer overflow in 'dp_dsc_clock_en_read()'\n\nTell snprintf() to store at most 10 bytes in the output buffer\ninstead of 30.\n\nFixes the below:\ndrivers/gpu/drm/amd/amdgpu/../display/amdgpu_dm/amdgpu_dm_debugfs.c:1508 dp_dsc_clock_en_read() error: snprintf() is printing too much 30 vs 10"
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}
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],
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"metrics": [
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{
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"cvssV3_1": {
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"version": "3.1",
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"vectorString": "CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H",
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"baseScore": 7,
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"baseSeverity": "HIGH"
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},
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"scenarios": [
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{
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"lang": "en",
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"value": "AV:L - The vulnerable code is a debugfs `.read` handler reached only by opening and reading /sys/kernel/debug/dri/N/DP-X/dsc_clock_en through the local VFS. There is no network, adjacent-network, or physical path into `dp_dsc_clock_en_read()`.\nAC:H - The overflow can only occur if `dsc_state.dsc_clock_en` formats to 10 or more characters, but that value is extracted from the DSC_TOP_CONTROL.DSC_CLOCK_EN register whose mask is 0x00000001 on every ASIC generation, so it is always 0 or 1 — a bound the attacker cannot influence. Triggering the mis-sized `snprintf()` is trivial, but making it actually write out of bounds depends on hardware register state entirely outside attacker control.\nPR:L - The node is created with mode 0644 and requires no capability check in the read path, so any local account able to traverse debugfs can reach it — the norm on Android, ChromeOS, embedded graphics stacks and IGT/debug setups that grant a non-root graphics account access to /sys/kernel/debug/dri. This matches the PR:L already assigned to the analogous amdgpu debugfs read in CVE-2024-35795.\nUI:N - The attacker simply reads the file; no victim action, modeset, or privileged helper invocation is needed. The DisplayPort/eDP connector node exists automatically whenever the amdgpu display driver has bound to the GPU.\nS:U - The affected `rd_buf` allocation and any resulting slab corruption live entirely within the kernel's own security authority. No VM, hypervisor, IOMMU, or sandbox boundary is crossed.\nC:H - Under the potential-overflow framing, the mis-sized `snprintf()` bound permits a heap out-of-bounds write past a 10-byte kcalloc allocation, and per scoring guidance memory corruption of this kind is treated as leverageable for kernel information disclosure. The read-back loop itself is bounded by `rd_buf_size` and the buffer is zeroed by kcalloc, so there is no direct read primitive.\nI:H - An out-of-bounds heap write is scored as High integrity impact, since corruption of slab contents beyond the allocated 10 bytes is the classic primitive for control-flow hijacking. The written bytes are the ASCII rendering of a kernel-controlled value rather than attacker-chosen data, which limits practical exploitability.\nA:H - Writing past the end of the kmalloc'd buffer corrupts allocator state adjacent to the object and trips redzone/KASAN out-of-bounds checks, either of which results in a kernel oops or panic. Any such heap corruption is scored as a full availability loss."
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}
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]
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}
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],
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"affected": [
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"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
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