{"id":"CVE-2026-23280","state":"PUBLISHED","title":"accel/amdxdna: Prevent ubuf size overflow","description":"In the Linux kernel, the following vulnerability has been resolved:\n\naccel/amdxdna: Prevent ubuf size overflow\n\nThe ubuf size calculation may overflow, resulting in an undersized\nallocation and possible memory corruption.\n\nUse check_add_overflow() helpers to validate the size calculation before\nallocation.","publishedAt":"2026-03-25T10:26:41.088Z","updatedAt":"2026-08-05T12:21:08.197Z","severity":{"score":7.8,"label":"High","version":"3.1","vector":"CVSS:3.1/AV:L/AC:L/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":"bd72d4acda1069579b35123e3cc0b21ec1193a21","status":"affected","lessThan":"1500b31db94374a6669e73ce94d6f71cf8e85e06","versionType":"git"},{"version":"bd72d4acda1069579b35123e3cc0b21ec1193a21","status":"affected","lessThan":"972bf4a23478fcb247b4f507d47a584bc8aea5bd","versionType":"git"},{"version":"bd72d4acda1069579b35123e3cc0b21ec1193a21","status":"affected","lessThan":"03808abb1d868aed7478a11a82e5bb4b3f1ca6d6","versionType":"git"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/accel/amdxdna/amdxdna_ubuf.c"]},{"vendor":"Linux","product":"Linux","defaultStatus":"affected","versions":[{"version":"6.18","status":"affected"},{"version":"0","status":"unaffected","lessThan":"6.18","versionType":"semver"},{"version":"6.18.17","status":"unaffected","lessThanOrEqual":"6.18.*","versionType":"semver"},{"version":"6.19.7","status":"unaffected","lessThanOrEqual":"6.19.*","versionType":"semver"},{"version":"7.0","status":"unaffected","lessThanOrEqual":"*","versionType":"original_commit_for_fix"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/accel/amdxdna/amdxdna_ubuf.c"]}],"references":["https://git.kernel.org/stable/c/1500b31db94374a6669e73ce94d6f71cf8e85e06","https://git.kernel.org/stable/c/972bf4a23478fcb247b4f507d47a584bc8aea5bd","https://git.kernel.org/stable/c/03808abb1d868aed7478a11a82e5bb4b3f1ca6d6"],"weaknesses":[],"ingestedAt":"2026-10-29T20:11:21.040Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2026/23xxx/CVE-2026-23280.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-23280","state":"PUBLISHED","datePublished":"2026-03-25T10:26:41.088Z","dateUpdated":"2026-08-05T12:21:08.197Z","assignerShortName":"Linux","assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","dateReserved":"2026-01-13T15:37:45.992Z"},"containers":{"cna":{"title":"accel/amdxdna: Prevent ubuf size overflow","descriptions":[{"lang":"en","value":"In the Linux kernel, the following vulnerability has been resolved:\n\naccel/amdxdna: Prevent ubuf size overflow\n\nThe ubuf size calculation may overflow, resulting in an undersized\nallocation and possible memory corruption.\n\nUse check_add_overflow() helpers to validate the size calculation before\nallocation."}],"affected":[{"vendor":"Linux","product":"Linux","defaultStatus":"unaffected","versions":[{"version":"bd72d4acda1069579b35123e3cc0b21ec1193a21","status":"affected","lessThan":"1500b31db94374a6669e73ce94d6f71cf8e85e06","versionType":"git"},{"version":"bd72d4acda1069579b35123e3cc0b21ec1193a21","status":"affected","lessThan":"972bf4a23478fcb247b4f507d47a584bc8aea5bd","versionType":"git"},{"version":"bd72d4acda1069579b35123e3cc0b21ec1193a21","status":"affected","lessThan":"03808abb1d868aed7478a11a82e5bb4b3f1ca6d6","versionType":"git"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/accel/amdxdna/amdxdna_ubuf.c"]},{"vendor":"Linux","product":"Linux","defaultStatus":"affected","versions":[{"version":"6.18","status":"affected"},{"version":"0","status":"unaffected","lessThan":"6.18","versionType":"semver"},{"version":"6.18.17","status":"unaffected","lessThanOrEqual":"6.18.*","versionType":"semver"},{"version":"6.19.7","status":"unaffected","lessThanOrEqual":"6.19.*","versionType":"semver"},{"version":"7.0","status":"unaffected","lessThanOrEqual":"*","versionType":"original_commit_for_fix"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/accel/amdxdna/amdxdna_ubuf.c"]}],"references":[{"url":"https://git.kernel.org/stable/c/1500b31db94374a6669e73ce94d6f71cf8e85e06"},{"url":"https://git.kernel.org/stable/c/972bf4a23478fcb247b4f507d47a584bc8aea5bd"},{"url":"https://git.kernel.org/stable/c/03808abb1d868aed7478a11a82e5bb4b3f1ca6d6"}],"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 vulnerability is triggered via a DRM ioctl (AMDXDNA_CREATE_BO) on a local accelerator device node (/dev/accel/accelN), requiring local system access.\nAC:L - The integer overflow is reliably triggered by providing crafted va_entry len values that sum to wrap around. No race condition or special conditions beyond attacker control are required.\nPR:L - The ioctl is defined with flags 0 (no DRM_ROOT_ONLY), so any user who can open the accel device node can trigger it. On systems with AMD XDNA hardware, logged-in desktop users typically have access via the render group.\nUI:N - No user interaction is needed; the attacker directly issues the ioctl.\nS:U - The vulnerability is a kernel memory corruption within the kernel's security authority; no cross-boundary escape (VM, IOMMU) is involved.\nC:H - The heap buffer overflow writes page structure pointers beyond the allocated array, corrupting adjacent kernel heap objects. This memory corruption can be leveraged to read arbitrary kernel memory.\nI:H - The heap buffer overflow corrupts kernel heap metadata and adjacent objects, which can be exploited for arbitrary write primitives and code execution via heap spraying techniques.\nA:H - The heap corruption will cause kernel crashes (oops/panic) when corrupted objects are subsequently accessed."}]}],"providerMetadata":{"shortName":"Linux","orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","dateUpdated":"2026-08-05T12:21:08.197Z"},"cpeApplicability":[{"nodes":[{"operator":"OR","negate":false,"cpeMatch":[{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"6.18","versionEndExcluding":"6.18.17"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"6.18","versionEndExcluding":"6.19.7"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"6.18","versionEndExcluding":"7.0"}]}]}],"x_generator":{"engine":"bippy-1.2.0"}}}}}