{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-43169", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2026-05-01T14:12:55.990Z", "datePublished": "2026-05-06T11:27:45.356Z", "dateUpdated": "2026-05-11T22:19:07.323Z"}, "containers": {"cna": {"providerMetadata": {"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-05-11T22:19:07.323Z"}, "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\ndrm/buddy: Prevent BUG_ON by validating rounded allocation\n\nWhen DRM_BUDDY_CONTIGUOUS_ALLOCATION is set, the requested size is\nrounded up to the next power-of-two via roundup_pow_of_two().\nSimilarly, for non-contiguous allocations with large min_block_size,\nthe size is aligned up via round_up(). Both operations can produce a\nrounded size that exceeds mm->size, which later triggers\nBUG_ON(order > mm->max_order).\n\nExample scenarios:\n- 9G CONTIGUOUS allocation on 10G VRAM memory:\n roundup_pow_of_two(9G) = 16G > 10G\n- 9G allocation with 8G min_block_size on 10G VRAM memory:\n round_up(9G, 8G) = 16G > 10G\n\nFix this by checking the rounded size against mm->size. For\nnon-contiguous or range allocations where size > mm->size is invalid,\nreturn -EINVAL immediately. For contiguous allocations without range\nrestrictions, allow the request to fall through to the existing\n__alloc_contig_try_harder() fallback.\n\nThis ensures invalid user input returns an error or uses the fallback\npath instead of hitting BUG_ON.\n\nv2: (Matt A)\n- Add Fixes, Cc stable, and Closes tags for context"}], "affected": [{"product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["drivers/gpu/drm/drm_buddy.c"], "versions": [{"version": "0a1844bf0b532d84324453374ad6845f64066c28", "lessThan": "d764b8dd420098a4d253b8a5b27568c897edb2cf", "status": "affected", "versionType": "git"}, {"version": "0a1844bf0b532d84324453374ad6845f64066c28", "lessThan": "6236c1cd9fdf433d39ed28b2491ccdfe7ae95061", "status": "affected", "versionType": "git"}, {"version": "0a1844bf0b532d84324453374ad6845f64066c28", "lessThan": "ecb32c60d8cbed2ee9ce9f343b6aa2f32babc727", "status": "affected", "versionType": "git"}, {"version": "0a1844bf0b532d84324453374ad6845f64066c28", "lessThan": "5488a29596cdba93a60a79398dc9b69d5bdadf92", "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/drm_buddy.c"], "versions": [{"version": "6.7", "status": "affected"}, {"version": "0", "lessThan": "6.7", "status": "unaffected", "versionType": "semver"}, {"version": "6.12.75", "lessThanOrEqual": "6.12.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.18.16", "lessThanOrEqual": "6.18.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.19.6", "lessThanOrEqual": "6.19.*", "status": "unaffected", "versionType": "semver"}, {"version": "7.0", "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": "6.7", "versionEndExcluding": "6.12.75"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.7", "versionEndExcluding": "6.18.16"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.7", "versionEndExcluding": "6.19.6"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.7", "versionEndExcluding": "7.0"}]}]}], "references": [{"url": "https://git.kernel.org/stable/c/d764b8dd420098a4d253b8a5b27568c897edb2cf"}, {"url": "https://git.kernel.org/stable/c/6236c1cd9fdf433d39ed28b2491ccdfe7ae95061"}, {"url": "https://git.kernel.org/stable/c/ecb32c60d8cbed2ee9ce9f343b6aa2f32babc727"}, {"url": "https://git.kernel.org/stable/c/5488a29596cdba93a60a79398dc9b69d5bdadf92"}], "title": "drm/buddy: Prevent BUG_ON by validating rounded allocation", "x_generator": {"engine": "bippy-1.2.0"}}}}

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{"affected": [{"affectedData": [{"defaultStatus": "unaffected", "product": "Linux", "programFiles": ["drivers/gpu/drm/drm_buddy.c"], "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "versions": [{"lessThan": "d764b8dd420098a4d253b8a5b27568c897edb2cf", "status": "affected", "version": "0a1844bf0b532d84324453374ad6845f64066c28", "versionType": "git"}, {"lessThan": "6236c1cd9fdf433d39ed28b2491ccdfe7ae95061", "status": "affected", "version": "0a1844bf0b532d84324453374ad6845f64066c28", "versionType": "git"}, {"lessThan": "ecb32c60d8cbed2ee9ce9f343b6aa2f32babc727", "status": "affected", "version": "0a1844bf0b532d84324453374ad6845f64066c28", "versionType": "git"}, {"lessThan": "5488a29596cdba93a60a79398dc9b69d5bdadf92", "status": "affected", "version": "0a1844bf0b532d84324453374ad6845f64066c28", "versionType": "git"}]}, {"defaultStatus": "affected", "product": "Linux", "programFiles": ["drivers/gpu/drm/drm_buddy.c"], "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "versions": [{"status": "affected", "version": "6.7"}, {"lessThan": "6.7", "status": "unaffected", "version": "0", "versionType": "semver"}, {"lessThanOrEqual": "6.12.*", "status": "unaffected", "version": "6.12.75", "versionType": "semver"}, {"lessThanOrEqual": "6.18.*", "status": "unaffected", "version": "6.18.16", "versionType": "semver"}, {"lessThanOrEqual": "6.19.*", "status": "unaffected", "version": "6.19.6", "versionType": "semver"}, {"lessThanOrEqual": "*", "status": "unaffected", "version": "7.0", "versionType": "original_commit_for_fix"}]}], "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}], "configurations": [{"nodes": [{"cpeMatch": [{"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "matchCriteriaId": "BCE16369-98ED-41CF-8995-DFDC10B288D2", "versionEndExcluding": "6.12.75", "versionStartIncluding": "6.7", "vulnerable": true}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "matchCriteriaId": "B4B8CDA9-BADF-4CF5-8B3B-702DE8EEA40B", "versionEndExcluding": "6.18.16", "versionStartIncluding": "6.13", "vulnerable": true}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "matchCriteriaId": "373EEEDA-FAA1-4FB4-B6ED-DB4DD99DBE67", "versionEndExcluding": "6.19.6", "versionStartIncluding": "6.19", "vulnerable": true}], "negate": false, "operator": "OR"}]}], "cveTags": [], "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\ndrm/buddy: Prevent BUG_ON by validating rounded allocation\n\nWhen DRM_BUDDY_CONTIGUOUS_ALLOCATION is set, the requested size is\nrounded up to the next power-of-two via roundup_pow_of_two().\nSimilarly, for non-contiguous allocations with large min_block_size,\nthe size is aligned up via round_up(). Both operations can produce a\nrounded size that exceeds mm->size, which later triggers\nBUG_ON(order > mm->max_order).\n\nExample scenarios:\n- 9G CONTIGUOUS allocation on 10G VRAM memory:\n roundup_pow_of_two(9G) = 16G > 10G\n- 9G allocation with 8G min_block_size on 10G VRAM memory:\n round_up(9G, 8G) = 16G > 10G\n\nFix this by checking the rounded size against mm->size. For\nnon-contiguous or range allocations where size > mm->size is invalid,\nreturn -EINVAL immediately. For contiguous allocations without range\nrestrictions, allow the request to fall through to the existing\n__alloc_contig_try_harder() fallback.\n\nThis ensures invalid user input returns an error or uses the fallback\npath instead of hitting BUG_ON.\n\nv2: (Matt A)\n- Add Fixes, Cc stable, and Closes tags for context"}], "id": "CVE-2026-43169", "lastModified": "2026-06-17T10:49:03.870", "metrics": {"cvssMetricV31": [{"cvssData": {"attackComplexity": "LOW", "attackVector": "LOCAL", "availabilityImpact": "HIGH", "baseScore": 5.5, "baseSeverity": "MEDIUM", "confidentialityImpact": "NONE", "integrityImpact": "NONE", "privilegesRequired": "LOW", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H", "version": "3.1"}, "exploitabilityScore": 1.8, "impactScore": 3.6, "source": "nvd@nist.gov", "type": "Primary"}]}, "published": "2026-05-06T12:16:35.197", "references": [{"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/5488a29596cdba93a60a79398dc9b69d5bdadf92"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/6236c1cd9fdf433d39ed28b2491ccdfe7ae95061"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/d764b8dd420098a4d253b8a5b27568c897edb2cf"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/ecb32c60d8cbed2ee9ce9f343b6aa2f32babc727"}], "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "vulnStatus": "Analyzed", "weaknesses": [{"description": [{"lang": "en", "value": "NVD-CWE-noinfo"}], "source": "nvd@nist.gov", "type": "Primary"}]}

{"bugzilla": {"description": "kernel: drm/buddy: Prevent BUG_ON by validating rounded allocation", "id": "2467108", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2467108"}, "csaw": false, "cvss3": {"cvss3_base_score": "7.0", "cvss3_scoring_vector": "CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H", "status": "draft"}, "cwe": "CWE-131", "details": ["A flaw was found in the drm/buddy component of the Linux kernel. This vulnerability occurs when the system processes memory allocation requests, particularly for contiguous or large non-contiguous blocks. Incorrect rounding of the requested size can lead to an allocation exceeding available memory, which triggers a BUG_ON condition. A local user could exploit this by providing malformed input, resulting in a system crash and a Denial of Service (DoS)."], "name": "CVE-2026-43169", "package_state": [{"cpe": "cpe:/o:redhat:enterprise_linux:10", "fix_state": "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": "Affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 9"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Affected", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 9"}], "public_date": "2026-05-06T00:00:00Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2026-43169\nhttps://nvd.nist.gov/vuln/detail/CVE-2026-43169\nhttps://lore.kernel.org/linux-cve-announce/2026050634-CVE-2026-43169-0e63@gregkh/T"], "threat_severity": "Moderate"}

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