264 lines
14 KiB
JSON
264 lines
14 KiB
JSON
{
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"dataType": "CVE_RECORD",
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"dataVersion": "5.2",
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"cveMetadata": {
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"cveId": "CVE-2022-50437",
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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": "2025-09-17T14:53:07.010Z",
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"datePublished": "2025-10-01T11:42:14.400Z",
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"dateUpdated": "2026-08-05T08:58:47.939Z"
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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": "2026-08-05T08:58:47.939Z"
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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/msm/hdmi: fix memory corruption with too many bridges\n\nAdd the missing sanity check on the bridge counter to avoid corrupting\ndata beyond the fixed-sized bridge array in case there are ever more\nthan eight bridges.\n\nPatchwork: https://patchwork.freedesktop.org/patch/502670/"
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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:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
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"baseScore": 7.8,
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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 OOB write is only in msm_hdmi_modeset_init during local MSM DRM aggregate bind (msm_drm_bind → MDP4/MDP5 modeset_init), reached via boot OF probe, module load, or sysfs bind—not via network or adjacent-link input.\nAC:L - Once num_bridges reaches MAX_BRIDGES (8)—including via the coexisting probe-deferral counter leak plus rebind cycles—the unchecked bridges[num_bridges++] store of hdmi->bridge is deterministic with no race or attacker-uncontrollable memory layout.\nPR:L - Forcing rebind via sysfs/module reload needs CAP_SYS_ADMIN/CAP_SYS_MODULE, but the same modeset_init path also runs on ordinary boot-time probe deferral of Qualcomm MSM display components with no credentials; resolving that ambiguity toward higher severity gives Low.\nUI:N - Probe deferral retries and driver bind/rebind tear-downs run entirely in kernel driver-core context; no victim mount, file open, or other interactive action is required.\nS:U - The corruption is of host-kernel msm_drm_private fields (bridges[] into adjacent vram metadata) within the same OS security authority; it does not cross a VM, IOMMU, or sandbox boundary.\nC:H - The missing bounds check is an out-of-bounds write of a drm_bridge pointer past bridges[MAX_BRIDGES] into adjacent kernel state (vram size/paddr/drm_mm), which per guidance yields High confidentiality via memory-corruption disclosure primitives.\nI:H - Out-of-bounds writes of kernel pointers into adjacent msm_drm_private VRAM/drm_mm fields are integrity High: they corrupt allocator/VRAM metadata and enable write/control-flow hijack primitives beyond a pure crash.\nA:H - Corrupting vram metadata and overrunning the fixed bridges array predictably causes kernel oops/panic or hang on subsequent DRM teardown or VRAM use, which is Availability High."
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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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{
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"product": "Linux",
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"vendor": "Linux",
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"defaultStatus": "unaffected",
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"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
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"programFiles": [
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"drivers/gpu/drm/msm/hdmi/hdmi.c"
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],
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"versions": [
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{
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"version": "a3376e3ec81c5dd0622cbc187db76d2824d31c1c",
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"lessThan": "a9c1a6991a9b5aa6d0f2cbc9b8c3bf6c4d094dfa",
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"status": "affected",
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"versionType": "git"
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},
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{
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"version": "a3376e3ec81c5dd0622cbc187db76d2824d31c1c",
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"lessThan": "e8f916b84e4b028ecad6c6472eaad543cc7df806",
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"status": "affected",
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"versionType": "git"
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},
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{
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"version": "a3376e3ec81c5dd0622cbc187db76d2824d31c1c",
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"lessThan": "3c43f3ec731c233eb84b66199ee76dbf3ec6ecae",
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"status": "affected",
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},
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{
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"version": "a3376e3ec81c5dd0622cbc187db76d2824d31c1c",
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"lessThan": "ed7f1ff87a4afea1bc220d2ff00a7ce8e61f0b53",
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"status": "affected",
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"versionType": "git"
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},
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{
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"version": "a3376e3ec81c5dd0622cbc187db76d2824d31c1c",
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"lessThan": "08c7375fa27a8ceee028868e03ffb3a0db919d44",
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"status": "affected",
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"versionType": "git"
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},
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{
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"version": "a3376e3ec81c5dd0622cbc187db76d2824d31c1c",
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"lessThan": "b48949ab451eaf1e2c04c272c8a9a96a2b56546f",
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"status": "affected",
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"versionType": "git"
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},
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{
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"version": "a3376e3ec81c5dd0622cbc187db76d2824d31c1c",
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"lessThan": "9efb45b45ff6254bfd1f1997a06725cb3fc998a5",
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"status": "affected",
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"versionType": "git"
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},
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{
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"version": "a3376e3ec81c5dd0622cbc187db76d2824d31c1c",
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"lessThan": "4c1294da6aed1f16d47a417dcfe6602833c3c95c",
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"status": "affected",
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"versionType": "git"
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}
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]
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},
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{
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"product": "Linux",
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"vendor": "Linux",
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"defaultStatus": "affected",
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"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
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"programFiles": [
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"drivers/gpu/drm/msm/hdmi/hdmi.c"
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],
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"versions": [
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{
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"version": "3.12",
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"status": "affected"
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},
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{
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"version": "0",
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"lessThan": "3.12",
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"status": "unaffected",
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"versionType": "semver"
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},
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{
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"version": "4.9.332",
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"lessThanOrEqual": "4.9.*",
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"status": "unaffected",
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"versionType": "semver"
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},
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{
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"version": "4.14.298",
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"lessThanOrEqual": "4.14.*",
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"status": "unaffected",
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"versionType": "semver"
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},
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{
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"version": "4.19.264",
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"lessThanOrEqual": "4.19.*",
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"status": "unaffected",
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"versionType": "semver"
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},
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{
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"version": "5.4.223",
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"lessThanOrEqual": "5.4.*",
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"status": "unaffected",
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"versionType": "semver"
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},
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{
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"version": "5.10.153",
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"lessThanOrEqual": "5.10.*",
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"status": "unaffected",
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"versionType": "semver"
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},
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{
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"version": "5.15.77",
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"lessThanOrEqual": "5.15.*",
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"status": "unaffected",
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"versionType": "semver"
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},
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{
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"version": "6.0.7",
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"lessThanOrEqual": "6.0.*",
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"status": "unaffected",
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"versionType": "semver"
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},
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{
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"version": "6.1",
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"lessThanOrEqual": "*",
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"status": "unaffected",
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"versionType": "original_commit_for_fix"
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}
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]
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}
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],
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"cpeApplicability": [
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{
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"nodes": [
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{
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"operator": "OR",
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"negate": false,
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"cpeMatch": [
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{
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"vulnerable": true,
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"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
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"versionStartIncluding": "3.12",
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"versionEndExcluding": "4.9.332"
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"references": [
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{
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"url": "https://git.kernel.org/stable/c/a9c1a6991a9b5aa6d0f2cbc9b8c3bf6c4d094dfa"
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},
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{
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"url": "https://git.kernel.org/stable/c/e8f916b84e4b028ecad6c6472eaad543cc7df806"
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},
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{
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"url": "https://git.kernel.org/stable/c/3c43f3ec731c233eb84b66199ee76dbf3ec6ecae"
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},
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{
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"url": "https://git.kernel.org/stable/c/ed7f1ff87a4afea1bc220d2ff00a7ce8e61f0b53"
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},
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{
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"url": "https://git.kernel.org/stable/c/08c7375fa27a8ceee028868e03ffb3a0db919d44"
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},
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{
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"url": "https://git.kernel.org/stable/c/b48949ab451eaf1e2c04c272c8a9a96a2b56546f"
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},
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{
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"url": "https://git.kernel.org/stable/c/9efb45b45ff6254bfd1f1997a06725cb3fc998a5"
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},
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{
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"url": "https://git.kernel.org/stable/c/4c1294da6aed1f16d47a417dcfe6602833c3c95c"
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}
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],
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"title": "drm/msm/hdmi: fix memory corruption with too many bridges",
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"x_generator": {
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"engine": "bippy-1.2.0"
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}
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}
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}
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} |