{"id":"CVE-2026-53329","state":"PUBLISHED","title":"drm/amd/display: Use krealloc_array() in dal_vector_reserve()","description":"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)","publishedAt":"2026-07-01T13:32:14.598Z","updatedAt":"2026-10-19T20:07:43.379Z","severity":{"score":7,"label":"High","version":"3.1","vector":"CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H","source":"Linux"},"assigner":"Linux","products":["Linux Linux"],"affected":[{"vendor":"Linux","product":"Linux","defaultStatus":"unaffected","versions":[{"version":"2004f45ef83f07f43f5da6ede780b08068c7583d","status":"affected","lessThan":"9540b0a4d13e4ede64ae1197d66a176d2149daa9","versionType":"git"},{"version":"2004f45ef83f07f43f5da6ede780b08068c7583d","status":"affected","lessThan":"31180638a33acad12c863132704a76536fb66211","versionType":"git"},{"version":"2004f45ef83f07f43f5da6ede780b08068c7583d","status":"affected","lessThan":"b15825deac1acff72638bbc8f05b89ceef8dfb13","versionType":"git"},{"version":"2004f45ef83f07f43f5da6ede780b08068c7583d","status":"affected","lessThan":"201151e120f0062bcda21cad5d007b82725ad23b","versionType":"git"},{"version":"2004f45ef83f07f43f5da6ede780b08068c7583d","status":"affected","lessThan":"a914aa802669e073f014dae2e5708633b5cecd34","versionType":"git"},{"version":"2004f45ef83f07f43f5da6ede780b08068c7583d","status":"affected","lessThan":"e09689286385a66311ac6922af95339d7a3cef8d","versionType":"git"},{"version":"2004f45ef83f07f43f5da6ede780b08068c7583d","status":"affected","lessThan":"de988c7a31f0774f07894cfe4802996f318e2870","versionType":"git"},{"version":"2004f45ef83f07f43f5da6ede780b08068c7583d","status":"affected","lessThan":"da48bc4461b8a5ebfb9264c9b191a701d8e99009","versionType":"git"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/gpu/drm/amd/display/dc/basics/vector.c"]},{"vendor":"Linux","product":"Linux","defaultStatus":"affected","versions":[{"version":"4.15","status":"affected"},{"version":"0","status":"unaffected","lessThan":"4.15","versionType":"semver"},{"version":"5.10.260","status":"unaffected","lessThanOrEqual":"5.10.*","versionType":"semver"},{"version":"5.15.210","status":"unaffected","lessThanOrEqual":"5.15.*","versionType":"semver"},{"version":"6.1.176","status":"unaffected","lessThanOrEqual":"6.1.*","versionType":"semver"},{"version":"6.6.143","status":"unaffected","lessThanOrEqual":"6.6.*","versionType":"semver"},{"version":"6.12.94","status":"unaffected","lessThanOrEqual":"6.12.*","versionType":"semver"},{"version":"6.18.36","status":"unaffected","lessThanOrEqual":"6.18.*","versionType":"semver"},{"version":"7.0.13","status":"unaffected","lessThanOrEqual":"7.0.*","versionType":"semver"},{"version":"7.1","status":"unaffected","lessThanOrEqual":"*","versionType":"original_commit_for_fix"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/gpu/drm/amd/display/dc/basics/vector.c"]}],"references":["https://git.kernel.org/stable/c/9540b0a4d13e4ede64ae1197d66a176d2149daa9","https://git.kernel.org/stable/c/31180638a33acad12c863132704a76536fb66211","https://git.kernel.org/stable/c/b15825deac1acff72638bbc8f05b89ceef8dfb13","https://git.kernel.org/stable/c/201151e120f0062bcda21cad5d007b82725ad23b","https://git.kernel.org/stable/c/a914aa802669e073f014dae2e5708633b5cecd34","https://git.kernel.org/stable/c/e09689286385a66311ac6922af95339d7a3cef8d","https://git.kernel.org/stable/c/de988c7a31f0774f07894cfe4802996f318e2870","https://git.kernel.org/stable/c/da48bc4461b8a5ebfb9264c9b191a701d8e99009"],"weaknesses":["CWE-190"],"ingestedAt":"2026-10-29T20:12:16.098Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2026/53xxx/CVE-2026-53329.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-53329","state":"PUBLISHED","datePublished":"2026-07-01T13:32:14.598Z","dateUpdated":"2026-10-19T20:07:43.379Z","assignerShortName":"Linux","assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","dateReserved":"2026-06-09T07:44:35.398Z"},"containers":{"cna":{"title":"drm/amd/display: Use krealloc_array() in dal_vector_reserve()","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)"}],"affected":[{"vendor":"Linux","product":"Linux","defaultStatus":"unaffected","versions":[{"version":"2004f45ef83f07f43f5da6ede780b08068c7583d","status":"affected","lessThan":"9540b0a4d13e4ede64ae1197d66a176d2149daa9","versionType":"git"},{"version":"2004f45ef83f07f43f5da6ede780b08068c7583d","status":"affected","lessThan":"31180638a33acad12c863132704a76536fb66211","versionType":"git"},{"version":"2004f45ef83f07f43f5da6ede780b08068c7583d","status":"affected","lessThan":"b15825deac1acff72638bbc8f05b89ceef8dfb13","versionType":"git"},{"version":"2004f45ef83f07f43f5da6ede780b08068c7583d","status":"affected","lessThan":"201151e120f0062bcda21cad5d007b82725ad23b","versionType":"git"},{"version":"2004f45ef83f07f43f5da6ede780b08068c7583d","status":"affected","lessThan":"a914aa802669e073f014dae2e5708633b5cecd34","versionType":"git"},{"version":"2004f45ef83f07f43f5da6ede780b08068c7583d","status":"affected","lessThan":"e09689286385a66311ac6922af95339d7a3cef8d","versionType":"git"},{"version":"2004f45ef83f07f43f5da6ede780b08068c7583d","status":"affected","lessThan":"de988c7a31f0774f07894cfe4802996f318e2870","versionType":"git"},{"version":"2004f45ef83f07f43f5da6ede780b08068c7583d","status":"affected","lessThan":"da48bc4461b8a5ebfb9264c9b191a701d8e99009","versionType":"git"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/gpu/drm/amd/display/dc/basics/vector.c"]},{"vendor":"Linux","product":"Linux","defaultStatus":"affected","versions":[{"version":"4.15","status":"affected"},{"version":"0","status":"unaffected","lessThan":"4.15","versionType":"semver"},{"version":"5.10.260","status":"unaffected","lessThanOrEqual":"5.10.*","versionType":"semver"},{"version":"5.15.210","status":"unaffected","lessThanOrEqual":"5.15.*","versionType":"semver"},{"version":"6.1.176","status":"unaffected","lessThanOrEqual":"6.1.*","versionType":"semver"},{"version":"6.6.143","status":"unaffected","lessThanOrEqual":"6.6.*","versionType":"semver"},{"version":"6.12.94","status":"unaffected","lessThanOrEqual":"6.12.*","versionType":"semver"},{"version":"6.18.36","status":"unaffected","lessThanOrEqual":"6.18.*","versionType":"semver"},{"version":"7.0.13","status":"unaffected","lessThanOrEqual":"7.0.*","versionType":"semver"},{"version":"7.1","status":"unaffected","lessThanOrEqual":"*","versionType":"original_commit_for_fix"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/gpu/drm/amd/display/dc/basics/vector.c"]}],"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"}],"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. That can cause kernel oops, panic, or display-driver crashes."}]}],"providerMetadata":{"shortName":"Linux","orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","dateUpdated":"2026-08-05T12:35:01.324Z"},"cpeApplicability":[{"nodes":[{"operator":"OR","negate":false,"cpeMatch":[{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"4.15","versionEndExcluding":"5.10.260"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"4.15","versionEndExcluding":"5.15.210"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"4.15","versionEndExcluding":"6.1.176"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"4.15","versionEndExcluding":"6.6.143"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"4.15","versionEndExcluding":"6.12.94"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"4.15","versionEndExcluding":"6.18.36"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"4.15","versionEndExcluding":"7.0.13"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"4.15","versionEndExcluding":"7.1"}]}]}],"x_generator":{"engine":"bippy-1.2.0"}},"adp":[{"title":"CISA ADP Vulnrichment","metrics":[{"other":{"type":"ssvc","content":{"id":"CVE-2026-53329","role":"CISA Coordinator","options":[{"Exploitation":"none"},{"Automatable":"no"},{"Technical Impact":"total"}],"version":"2.0.3","timestamp":"2026-10-16T15:28:28.487148Z"}}}],"problemTypes":[{"descriptions":[{"cweId":"CWE-190","lang":"en","type":"CWE","description":"CWE-190 Integer Overflow or Wraparound"}]}],"providerMetadata":{"shortName":"CISA-ADP","orgId":"134c704f-9b21-4f2e-91b3-4a467353bcc0","dateUpdated":"2026-10-19T20:07:43.379Z"}}]}}}