{ "dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": { "cveId": "CVE-2022-50437", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2025-09-17T14:53:07.010Z", "datePublished": "2025-10-01T11:42:14.400Z", "dateUpdated": "2026-08-05T08:58:47.939Z" }, "containers": { "cna": { "providerMetadata": { "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-08-05T08:58:47.939Z" }, "descriptions": [ { "lang": "en", "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/" } ], "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 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." } ] } ], "affected": [ { "product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": [ "drivers/gpu/drm/msm/hdmi/hdmi.c" ], "versions": [ { "version": "a3376e3ec81c5dd0622cbc187db76d2824d31c1c", "lessThan": "a9c1a6991a9b5aa6d0f2cbc9b8c3bf6c4d094dfa", "status": "affected", "versionType": "git" }, { "version": "a3376e3ec81c5dd0622cbc187db76d2824d31c1c", "lessThan": "e8f916b84e4b028ecad6c6472eaad543cc7df806", "status": "affected", "versionType": "git" }, { "version": "a3376e3ec81c5dd0622cbc187db76d2824d31c1c", "lessThan": "3c43f3ec731c233eb84b66199ee76dbf3ec6ecae", "status": "affected", "versionType": "git" }, { "version": "a3376e3ec81c5dd0622cbc187db76d2824d31c1c", "lessThan": "ed7f1ff87a4afea1bc220d2ff00a7ce8e61f0b53", "status": "affected", "versionType": "git" }, { "version": "a3376e3ec81c5dd0622cbc187db76d2824d31c1c", "lessThan": "08c7375fa27a8ceee028868e03ffb3a0db919d44", "status": "affected", "versionType": "git" }, { "version": "a3376e3ec81c5dd0622cbc187db76d2824d31c1c", "lessThan": "b48949ab451eaf1e2c04c272c8a9a96a2b56546f", "status": "affected", "versionType": "git" }, { "version": "a3376e3ec81c5dd0622cbc187db76d2824d31c1c", "lessThan": "9efb45b45ff6254bfd1f1997a06725cb3fc998a5", "status": "affected", "versionType": "git" }, { "version": "a3376e3ec81c5dd0622cbc187db76d2824d31c1c", "lessThan": "4c1294da6aed1f16d47a417dcfe6602833c3c95c", "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/msm/hdmi/hdmi.c" ], "versions": [ { "version": "3.12", "status": "affected" }, { "version": "0", "lessThan": "3.12", "status": "unaffected", "versionType": "semver" }, { "version": "4.9.332", "lessThanOrEqual": "4.9.*", "status": "unaffected", "versionType": "semver" }, { "version": "4.14.298", "lessThanOrEqual": "4.14.*", "status": "unaffected", "versionType": "semver" }, { "version": "4.19.264", "lessThanOrEqual": "4.19.*", "status": "unaffected", "versionType": "semver" }, { "version": "5.4.223", "lessThanOrEqual": "5.4.*", "status": "unaffected", "versionType": "semver" }, { "version": "5.10.153", "lessThanOrEqual": "5.10.*", "status": "unaffected", "versionType": "semver" }, { "version": "5.15.77", "lessThanOrEqual": "5.15.*", "status": "unaffected", "versionType": "semver" }, { "version": "6.0.7", "lessThanOrEqual": "6.0.*", "status": "unaffected", "versionType": "semver" }, { "version": "6.1", "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": "3.12", "versionEndExcluding": "4.9.332" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "3.12", "versionEndExcluding": "4.14.298" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "3.12", "versionEndExcluding": "4.19.264" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "3.12", "versionEndExcluding": "5.4.223" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "3.12", "versionEndExcluding": "5.10.153" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "3.12", "versionEndExcluding": "5.15.77" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "3.12", "versionEndExcluding": "6.0.7" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "3.12", "versionEndExcluding": "6.1" } ] } ] } ], "references": [ { "url": "https://git.kernel.org/stable/c/a9c1a6991a9b5aa6d0f2cbc9b8c3bf6c4d094dfa" }, { "url": "https://git.kernel.org/stable/c/e8f916b84e4b028ecad6c6472eaad543cc7df806" }, { "url": "https://git.kernel.org/stable/c/3c43f3ec731c233eb84b66199ee76dbf3ec6ecae" }, { "url": "https://git.kernel.org/stable/c/ed7f1ff87a4afea1bc220d2ff00a7ce8e61f0b53" }, { "url": "https://git.kernel.org/stable/c/08c7375fa27a8ceee028868e03ffb3a0db919d44" }, { "url": "https://git.kernel.org/stable/c/b48949ab451eaf1e2c04c272c8a9a96a2b56546f" }, { "url": "https://git.kernel.org/stable/c/9efb45b45ff6254bfd1f1997a06725cb3fc998a5" }, { "url": "https://git.kernel.org/stable/c/4c1294da6aed1f16d47a417dcfe6602833c3c95c" } ], "title": "drm/msm/hdmi: fix memory corruption with too many bridges", "x_generator": { "engine": "bippy-1.2.0" } } } }