{"id":"CVE-2024-56712","title":"udmabuf: fix memory leak on last export_udmabuf() error path","summary":"In the Linux kernel, the following vulnerability has been resolved:\n\nudmabuf: fix memory leak on last export_udmabuf() error path\n\nIn export_udmabuf(), if dma_buf_fd() fails because the FD table is full, a\ndma_buf owning the udmabuf has …","severity":"low","cvss":3.3,"cvssVector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L","cvssSource":"adp","vendor":"Linux","product":"Linux","affected":["Linux >= fbb0de795078190a9834b3409e4b009cfb18a6d4 < e469922fbdf6ad729e5dc8d49289b5036a0ecdf8","Linux >= fbb0de795078190a9834b3409e4b009cfb18a6d4 < c9fc8428d4255c2128da9c4d5cd92e554d0150cf","Linux >= fbb0de795078190a9834b3409e4b009cfb18a6d4 < f49856f525acd5bef52ae28b7da2e001bbe7439e","Linux 4.20"],"ssvc":{"exploitation":"none","automatable":"no","technicalImpact":"partial","timestamp":"2025-04-17T20:10:27.510565Z"},"published":"2024-12-29","updated":"2026-10-21","sourceUpdated":"2026-10-21T12:35:39.161Z","source":"CVEORG","sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2024-56712","references":[{"url":"https://git.kernel.org/stable/c/e469922fbdf6ad729e5dc8d49289b5036a0ecdf8"},{"url":"https://git.kernel.org/stable/c/c9fc8428d4255c2128da9c4d5cd92e554d0150cf"},{"url":"https://git.kernel.org/stable/c/f49856f525acd5bef52ae28b7da2e001bbe7439e"}],"tags":["cve.org"],"epss":0.0025,"epssPercentile":0.16335,"ingestedAt":"2026-10-21T12:48:53.723Z","slug":"CVE-2024-56712","body":"## Overview\n\nIn the Linux kernel, the following vulnerability has been resolved:\n\nudmabuf: fix memory leak on last export_udmabuf() error path\n\nIn export_udmabuf(), if dma_buf_fd() fails because the FD table is full, a\ndma_buf owning the udmabuf has already been created; but the error handling\nin udmabuf_create() will tear down the udmabuf without doing anything about\nthe containing dma_buf.\n\nThis leaves a dma_buf in memory that contains a dangling pointer; though\nthat doesn't seem to lead to anything bad except a memory leak.\n\nFix it by moving the dma_buf_fd() call out of export_udmabuf() so that we\ncan give it different error handling.\n\nNote that the shape of this code changed a lot in commit 5e72b2b41a21\n(\"udmabuf: convert udmabuf driver to use folios\"); but the memory leak\nseems to have existed since the introduction of udmabuf.\n\n## Affected\n\n- `Linux >= fbb0de795078190a9834b3409e4b009cfb18a6d4 < e469922fbdf6ad729e5dc8d49289b5036a0ecdf8`\n- `Linux >= fbb0de795078190a9834b3409e4b009cfb18a6d4 < c9fc8428d4255c2128da9c4d5cd92e554d0150cf`\n- `Linux >= fbb0de795078190a9834b3409e4b009cfb18a6d4 < f49856f525acd5bef52ae28b7da2e001bbe7439e`\n- `Linux 4.20`\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.","depth":"sunlit","depthScore":18,"depthScoreParts":{"impact":18.2,"likelihood":0.1,"exploitation":0,"ransomware":0},"changes":[]}