CVE-2022-50867

{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2022-50867", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2025-12-30T12:06:07.136Z", "datePublished": "2025-12-30T12:15:38.520Z", "dateUpdated": "2026-08-05T08:59:53.122Z"}, "containers": {"cna": {"providerMetadata": {"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-08-05T08:59:53.122Z"}, "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\ndrm/msm/a6xx: Fix kvzalloc vs state_kcalloc usage\n\nadreno_show_object() is a trap! It will re-allocate the pointer it is\npassed on first call, when the data is ascii85 encoded, using kvmalloc/\nkvfree(). Which means the data *passed* to it must be kvmalloc'd, ie.\nwe cannot use the state_kcalloc() helper.\n\nThis partially reverts commit ec8f1813bf8d (\"drm/msm/a6xx: Replace\nkcalloc() with kvzalloc()\"), but adds the missing kvfree() to fix the\nmemory leak that was present previously. And adds a warning comment.\n\nPatchwork: https://patchwork.freedesktop.org/patch/507014/"}], "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 vulnerable show/encode path is reached after a local GPU hang or iova fault captures crash state via msm_gpu_crashstate_capture(); an unprivileged process triggers that through DRM render-node submits (MSM_GEM_SUBMIT). There is no network or adjacent-packet path into a6xx_show/adreno_show_object.\nAC:L - An attacker fully controls both sides: submit work that hangs or faults the a6xx GPU, then rely on the deterministic ascii85 reallocation in adreno_show_object() when the dump is read. No race or attacker-uncontrollable memory-layout precondition is required.\nPR:L - Unprivileged users can open /dev/dri/renderD* and hang the GPU. On the primary msm deployments (ChromeOS/Android), crash_reporter/udev_collector automatically reads /sys/class/devcoredump/devcdN/data for the adreno driver, invoking the bad kvfree without the attacker needing root. Choosing the higher-severity PR:L over PR:H for that reasonable scenario.\nUI:N - The attacker submits the hanging GPU work themselves, and automatic device-coredump collection invokes a6xx_show without any separate victim mount/open/interactive action.\nS:U - The invalid free corrupts host kernel allocator state within the same OS security authority; this is a local privilege-escalation class bug, not a VM escape, IOMMU bypass, or other cross-boundary impact.\nC:H - adreno_show_object() kvfree()s an interior pointer into a state_kcalloc() memobj (past list_head), corrupting kvmalloc/SLUB freelist metadata; that heap corruption can be leveraged for arbitrary kernel memory disclosure, matching kernel CVSS guidance for memory-corruption bugs.\nI:H - The same interior-pointer free (and subsequent double-free of the memobj on a6xx_gpu_state_destroy) corrupts heap freelists and adjacent objects, enabling reuse and write/control-flow hijacking primitives rather than a benign bounded fault.\nA:H - The gitlab issue closed by the fix reports that reading the devcoredump triggers memory corruption; invalid free/double-free produce kernel oops/panic, which is Availability High under kernel CVSS guidance."}]}], "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/adreno/a6xx_gpu_state.c", "drivers/gpu/drm/msm/adreno/adreno_gpu.c"], "versions": [{"version": "b859f9b009bbfbc236d9b076c64c59ccb41b8737", "lessThan": "4b1bbc0571a5d7ee10f754186dc3d619b9ced5c1", "status": "affected", "versionType": "git"}, {"version": "b859f9b009bbfbc236d9b076c64c59ccb41b8737", "lessThan": "83d18e9d9c0150d98dc24e3642ea93f5e245322c", "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/adreno/a6xx_gpu_state.c", "drivers/gpu/drm/msm/adreno/adreno_gpu.c"], "versions": [{"version": "5.17", "status": "affected"}, {"version": "0", "lessThan": "5.17", "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": "5.17", "versionEndExcluding": "6.0.7"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.17", "versionEndExcluding": "6.1"}]}]}], "references": [{"url": "https://git.kernel.org/stable/c/4b1bbc0571a5d7ee10f754186dc3d619b9ced5c1"}, {"url": "https://git.kernel.org/stable/c/83d18e9d9c0150d98dc24e3642ea93f5e245322c"}], "title": "drm/msm/a6xx: Fix kvzalloc vs state_kcalloc usage", "x_generator": {"engine": "bippy-1.2.0"}}}}

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{"affected": [{"affectedData": [{"defaultStatus": "unaffected", "product": "Linux", "programFiles": ["drivers/gpu/drm/msm/adreno/a6xx_gpu_state.c", "drivers/gpu/drm/msm/adreno/adreno_gpu.c"], "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "versions": [{"lessThan": "4b1bbc0571a5d7ee10f754186dc3d619b9ced5c1", "status": "affected", "version": "b859f9b009bbfbc236d9b076c64c59ccb41b8737", "versionType": "git"}, {"lessThan": "83d18e9d9c0150d98dc24e3642ea93f5e245322c", "status": "affected", "version": "b859f9b009bbfbc236d9b076c64c59ccb41b8737", "versionType": "git"}]}, {"defaultStatus": "affected", "product": "Linux", "programFiles": ["drivers/gpu/drm/msm/adreno/a6xx_gpu_state.c", "drivers/gpu/drm/msm/adreno/adreno_gpu.c"], "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "versions": [{"status": "affected", "version": "5.17"}, {"lessThan": "5.17", "status": "unaffected", "version": "0", "versionType": "semver"}, {"lessThanOrEqual": "6.0.*", "status": "unaffected", "version": "6.0.7", "versionType": "semver"}, {"lessThanOrEqual": "*", "status": "unaffected", "version": "6.1", "versionType": "original_commit_for_fix"}]}], "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}], "cveTags": [], "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\ndrm/msm/a6xx: Fix kvzalloc vs state_kcalloc usage\n\nadreno_show_object() is a trap! It will re-allocate the pointer it is\npassed on first call, when the data is ascii85 encoded, using kvmalloc/\nkvfree(). Which means the data *passed* to it must be kvmalloc'd, ie.\nwe cannot use the state_kcalloc() helper.\n\nThis partially reverts commit ec8f1813bf8d (\"drm/msm/a6xx: Replace\nkcalloc() with kvzalloc()\"), but adds the missing kvfree() to fix the\nmemory leak that was present previously. And adds a warning comment.\n\nPatchwork: https://patchwork.freedesktop.org/patch/507014/"}], "id": "CVE-2022-50867", "lastModified": "2026-08-04T10:18:24.920", "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"}]}, "published": "2025-12-30T13:16:01.533", "references": [{"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/4b1bbc0571a5d7ee10f754186dc3d619b9ced5c1"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/83d18e9d9c0150d98dc24e3642ea93f5e245322c"}], "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "vulnStatus": "Deferred"}

{"bugzilla": {"description": "kernel: drm/msm/a6xx: Replace kcalloc() with kvzalloc()", "id": "2426200", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2426200"}, "csaw": false, "details": ["No description is available for this CVE."], "name": "CVE-2022-50867", "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": "Not affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:8", "fix_state": "Not affected", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Not affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 9"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Not affected", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 9"}], "public_date": "2025-12-30T00:00:00Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2022-50867\nhttps://nvd.nist.gov/vuln/detail/CVE-2022-50867\nhttps://lore.kernel.org/linux-cve-announce/2025123050-CVE-2022-50867-cf19@gregkh/T"]}

{}