CVE-2026-53329

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This would cause krealloc to\nreturn a smaller buffer than expected, leading to heap overflows on\nsubsequent vector appends.\n\nReplace krealloc() with krealloc_array() which performs an internal\noverflow check and returns NULL on wrap, preventing the issue.\n\n(cherry picked from commit 37668568641ccc4cc1dbca4923d0a16609dd5707)"}], "metrics": [{"cvssV3_1": {"version": "3.1", "vectorString": "CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H", "baseScore": 7, "baseSeverity": "HIGH"}, "scenarios": [{"lang": "en", "value": "AV:L - The reachable kernel path is AMDGPU DRM display handling via local DRM connector probing or modeset operations; it is not network or namespace reachable. Physical hotplug can also reach related detection paths, but local DRM access is the higher-severity reasonable vector.\nAC:H - The overflow is deterministic once vector capacity crosses the uint32 multiplication limit, but the reachable DDC callers I found pass fixed tiny payload lengths and an attacker would need an unusual path causing enormous vector growth. That prerequisite is outside normal attacker control.\nPR:L - Triggering the relevant DRM display paths requires local access to the KMS device or DRM master-style display control, not real root in the init namespace. No user-namespace route or network-facing unauthenticated path reaches this code.\nUI:N - A local attacker who has the needed DRM access can trigger connector probing or modeset paths directly. No separate victim action is required.\nS:U - The corruption occurs inside the host kernel display driver and affects the same kernel security authority. There is no VM escape, IOMMU boundary bypass, or cross-scope component involved.\nC:H - The vulnerable allocation can leave the vector with a logical capacity larger than its actual heap buffer, and subsequent appends can corrupt adjacent kernel heap memory. Kernel heap corruption is reasonably leverageable for information disclosure.\nI:H - Subsequent vector appends perform out-of-bounds writes of controlled `struct i2c_payload` contents into adjacent kernel heap memory. That is kernel memory corruption and can plausibly support control-flow or data-integrity compromise.\nA:H - Even without full exploitation, the undersized allocation followed by appends can corrupt heap metadata or neighboring objects. 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Physical hotplug can also reach related detection paths, but local DRM access is the higher-severity reasonable vector.\nAC:H - The overflow is deterministic once vector capacity crosses the uint32 multiplication limit, but the reachable DDC callers I found pass fixed tiny payload lengths and an attacker would need an unusual path causing enormous vector growth. That prerequisite is outside normal attacker control.\nPR:L - Triggering the relevant DRM display paths requires local access to the KMS device or DRM master-style display control, not real root in the init namespace. No user-namespace route or network-facing unauthenticated path reaches this code.\nUI:N - A local attacker who has the needed DRM access can trigger connector probing or modeset paths directly. No separate victim action is required.\nS:U - The corruption occurs inside the host kernel display driver and affects the same kernel security authority. There is no VM escape, IOMMU boundary bypass, or cross-scope component involved.\nC:H - The vulnerable allocation can leave the vector with a logical capacity larger than its actual heap buffer, and subsequent appends can corrupt adjacent kernel heap memory. Kernel heap corruption is reasonably leverageable for information disclosure.\nI:H - Subsequent vector appends perform out-of-bounds writes of controlled `struct i2c_payload` contents into adjacent kernel heap memory. That is kernel memory corruption and can plausibly support control-flow or data-integrity compromise.\nA:H - Even without full exploitation, the undersized allocation followed by appends can corrupt heap metadata or neighboring objects. That can cause kernel oops, panic, or display-driver crashes."}]}], "affected": [{"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "product": "Linux", "versions": [{"status": "affected", "version": "2004f45ef83f07f43f5da6ede780b08068c7583d", "lessThan": "9540b0a4d13e4ede64ae1197d66a176d2149daa9", "versionType": "git"}, {"status": "affected", "version": "2004f45ef83f07f43f5da6ede780b08068c7583d", "lessThan": "31180638a33acad12c863132704a76536fb66211", "versionType": "git"}, {"status": "affected", "version": "2004f45ef83f07f43f5da6ede780b08068c7583d", "lessThan": "b15825deac1acff72638bbc8f05b89ceef8dfb13", "versionType": "git"}, {"status": "affected", "version": "2004f45ef83f07f43f5da6ede780b08068c7583d", "lessThan": "201151e120f0062bcda21cad5d007b82725ad23b", "versionType": "git"}, {"status": "affected", "version": "2004f45ef83f07f43f5da6ede780b08068c7583d", "lessThan": "a914aa802669e073f014dae2e5708633b5cecd34", "versionType": "git"}, {"status": "affected", "version": "2004f45ef83f07f43f5da6ede780b08068c7583d", "lessThan": "e09689286385a66311ac6922af95339d7a3cef8d", "versionType": "git"}, {"status": "affected", "version": "2004f45ef83f07f43f5da6ede780b08068c7583d", "lessThan": "de988c7a31f0774f07894cfe4802996f318e2870", "versionType": "git"}, {"status": "affected", "version": "2004f45ef83f07f43f5da6ede780b08068c7583d", "lessThan": "da48bc4461b8a5ebfb9264c9b191a701d8e99009", "versionType": "git"}], "programFiles": ["drivers/gpu/drm/amd/display/dc/basics/vector.c"], "defaultStatus": "unaffected"}, {"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "product": "Linux", "versions": [{"status": "affected", "version": "4.15"}, {"status": "unaffected", "version": "0", "lessThan": "4.15", "versionType": "semver"}, {"status": "unaffected", "version": "5.10.260", "versionType": "semver", "lessThanOrEqual": "5.10.*"}, {"status": "unaffected", "version": "5.15.210", "versionType": "semver", "lessThanOrEqual": "5.15.*"}, {"status": "unaffected", "version": "6.1.176", "versionType": "semver", "lessThanOrEqual": "6.1.*"}, {"status": "unaffected", "version": "6.6.143", "versionType": "semver", "lessThanOrEqual": "6.6.*"}, {"status": "unaffected", "version": "6.12.94", "versionType": "semver", "lessThanOrEqual": "6.12.*"}, {"status": "unaffected", "version": "6.18.36", "versionType": "semver", "lessThanOrEqual": "6.18.*"}, {"status": "unaffected", "version": "7.0.13", "versionType": "semver", "lessThanOrEqual": "7.0.*"}, {"status": "unaffected", "version": "7.1", "versionType": "original_commit_for_fix", "lessThanOrEqual": "*"}], "programFiles": ["drivers/gpu/drm/amd/display/dc/basics/vector.c"], "defaultStatus": "affected"}], "references": [{"url": "https://git.kernel.org/stable/c/9540b0a4d13e4ede64ae1197d66a176d2149daa9"}, {"url": "https://git.kernel.org/stable/c/31180638a33acad12c863132704a76536fb66211"}, {"url": "https://git.kernel.org/stable/c/b15825deac1acff72638bbc8f05b89ceef8dfb13"}, {"url": "https://git.kernel.org/stable/c/201151e120f0062bcda21cad5d007b82725ad23b"}, {"url": "https://git.kernel.org/stable/c/a914aa802669e073f014dae2e5708633b5cecd34"}, {"url": "https://git.kernel.org/stable/c/e09689286385a66311ac6922af95339d7a3cef8d"}, {"url": "https://git.kernel.org/stable/c/de988c7a31f0774f07894cfe4802996f318e2870"}, {"url": "https://git.kernel.org/stable/c/da48bc4461b8a5ebfb9264c9b191a701d8e99009"}], "x_generator": {"engine": "bippy-1.2.0"}, "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\ndrm/amd/display: Use krealloc_array() in dal_vector_reserve()\n\n[Why & How]\ndal_vector_reserve() computes the allocation size as\n\"capacity * vector->struct_size\" using uint32_t arithmetic, which can\nsilently wrap to a small value on overflow. This would cause krealloc to\nreturn a smaller buffer than expected, leading to heap overflows on\nsubsequent vector appends.\n\nReplace krealloc() with krealloc_array() which performs an internal\noverflow check and returns NULL on wrap, preventing the issue.\n\n(cherry picked from commit 37668568641ccc4cc1dbca4923d0a16609dd5707)"}], "cpeApplicability": [{"nodes": [{"negate": false, "cpeMatch": [{"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "versionEndExcluding": "5.10.260", "versionStartIncluding": "4.15"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "versionEndExcluding": "5.15.210", "versionStartIncluding": "4.15"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "versionEndExcluding": "6.1.176", "versionStartIncluding": "4.15"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "versionEndExcluding": "6.6.143", "versionStartIncluding": "4.15"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "versionEndExcluding": "6.12.94", "versionStartIncluding": "4.15"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "versionEndExcluding": "6.18.36", "versionStartIncluding": "4.15"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "versionEndExcluding": "7.0.13", "versionStartIncluding": "4.15"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "versionEndExcluding": "7.1", "versionStartIncluding": "4.15"}], "operator": "OR"}]}], "providerMetadata": {"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-08-05T12:35:01.324Z"}}}, "cveMetadata": {"cveId": "CVE-2026-53329", "state": "PUBLISHED", "dateUpdated": "2026-10-19T20:07:43.379Z", "dateReserved": "2026-06-09T07:44:35.398Z", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "datePublished": "2026-07-01T13:32:14.598Z", "assignerShortName": "Linux"}, "dataVersion": "5.2"}

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"vulnerable": true}, {"criteria": "cpe:2.3:o:linux:linux_kernel:7.1:rc6:*:*:*:*:*:*", "matchCriteriaId": "B0E8FC71-3952-444C-83E9-718DBBBEC615", "vulnerable": true}], "negate": false, "operator": "OR"}]}], "cveTags": [], "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\ndrm/amd/display: Use krealloc_array() in dal_vector_reserve()\n\n[Why & How]\ndal_vector_reserve() computes the allocation size as\n\"capacity * vector->struct_size\" using uint32_t arithmetic, which can\nsilently wrap to a small value on overflow. This would cause krealloc to\nreturn a smaller buffer than expected, leading to heap overflows on\nsubsequent vector appends.\n\nReplace krealloc() with krealloc_array() which performs an internal\noverflow check and returns NULL on wrap, preventing the issue.\n\n(cherry picked from commit 37668568641ccc4cc1dbca4923d0a16609dd5707)"}], "id": "CVE-2026-53329", "lastModified": "2026-10-19T20:19:14.930", "metrics": {"cvssMetricV31": [{"cvssData": {"attackComplexity": "HIGH", "attackVector": "LOCAL", "availabilityImpact": "HIGH", "baseScore": 7.0, "baseSeverity": "HIGH", "confidentialityImpact": "HIGH", "integrityImpact": "HIGH", "privilegesRequired": "LOW", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H", "version": "3.1"}, "exploitabilityScore": 1.0, "impactScore": 5.9, "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "type": "Secondary"}], "ssvcV203": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "ssvcData": {"id": "CVE-2026-53329", "options": [{"exploitation": "none"}, {"automatable": "no"}, {"technicalImpact": "total"}], "role": "CISA Coordinator", "timestamp": "2026-10-16T15:28:28.487148Z", "version": "2.0.3"}}]}, "published": "2026-07-01T14:16:40.760", "references": [{"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/201151e120f0062bcda21cad5d007b82725ad23b"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/31180638a33acad12c863132704a76536fb66211"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/9540b0a4d13e4ede64ae1197d66a176d2149daa9"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/a914aa802669e073f014dae2e5708633b5cecd34"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/b15825deac1acff72638bbc8f05b89ceef8dfb13"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/da48bc4461b8a5ebfb9264c9b191a701d8e99009"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/de988c7a31f0774f07894cfe4802996f318e2870"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/e09689286385a66311ac6922af95339d7a3cef8d"}], "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "vulnStatus": "Modified", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-674"}], "source": "nvd@nist.gov", "type": "Primary"}, {"description": [{"lang": "en", "value": "CWE-190"}], "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "type": "Secondary"}]}

{"bugzilla": {"description": "kernel: drm/amd/display: Use krealloc_array() in dal_vector_reserve()", "id": "2495941", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2495941"}, "csaw": false, "cwe": "CWE-787", "details": ["A flaw was found in the Linux kernel's `drm/amd/display` component. The `dal_vector_reserve()` function calculates memory allocation size using 32-bit arithmetic, which can lead to an integer overflow. This overflow causes a smaller memory buffer to be allocated than intended, resulting in a heap overflow when data is subsequently appended to the vector. An attacker could potentially use this to cause a denial of service or execute arbitrary code."], "name": "CVE-2026-53329", "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": "2026-07-01T00:00:00Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2026-53329\nhttps://nvd.nist.gov/vuln/detail/CVE-2026-53329\nhttps://lore.kernel.org/linux-cve-announce/2026070142-CVE-2026-53329-ccf5@gregkh/T"]}

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