{"id":"CVE-2025-40053","title":"net: dlink: handle copy_thresh allocation failure","summary":"In the Linux kernel, the following vulnerability has been resolved:\n\nnet: dlink: handle copy_thresh allocation failure\n\nThe driver did not handle failure of `netdev_alloc_skb_ip_align()`.\nIf the allocation failed, dereferencing `skb->pro…","severity":"high","cvss":7.5,"cvssVector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","cvssSource":"cna","vendor":"Linux","product":"Linux","affected":["Linux >= 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 < 84fd710a704f3d53d4120e452e86cea558cf73a8","Linux >= 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 < 5aa9b885602811a026a3f45c92ea2b4b04c54f09","Linux >= 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 < 9d49e4b14609e1a20d931e718962c4b6b5485174","Linux >= 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 < ea87151df398d407a632c7bf63013290f01c5009","Linux >= 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 < 7ed5010fef0930f4322d620052edc854ef3ec41f","Linux >= 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 < fd7b6b2c920d7fd370a612be416a904d6e1ebe55","Linux >= 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 < 8169a6011c5fecc6cb1c3654c541c567d3318de8","Linux 2.6.12"],"ssvc":{"exploitation":"none","automatable":"yes","technicalImpact":"partial","timestamp":"2026-10-15T21:56:34.706462Z"},"published":"2025-10-28","updated":"2026-10-15","sourceUpdated":"2026-10-15T22:02:37.095Z","source":"CVEORG","sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2025-40053","references":[{"url":"https://git.kernel.org/stable/c/84fd710a704f3d53d4120e452e86cea558cf73a8"},{"url":"https://git.kernel.org/stable/c/5aa9b885602811a026a3f45c92ea2b4b04c54f09"},{"url":"https://git.kernel.org/stable/c/9d49e4b14609e1a20d931e718962c4b6b5485174"},{"url":"https://git.kernel.org/stable/c/ea87151df398d407a632c7bf63013290f01c5009"},{"url":"https://git.kernel.org/stable/c/7ed5010fef0930f4322d620052edc854ef3ec41f"},{"url":"https://git.kernel.org/stable/c/fd7b6b2c920d7fd370a612be416a904d6e1ebe55"},{"url":"https://git.kernel.org/stable/c/8169a6011c5fecc6cb1c3654c541c567d3318de8"}],"tags":["cve.org"],"epss":0.00629,"epssPercentile":0.49921,"ingestedAt":"2026-10-15T22:48:25.544Z","slug":"CVE-2025-40053","body":"## Overview\n\nIn the Linux kernel, the following vulnerability has been resolved:\n\nnet: dlink: handle copy_thresh allocation failure\n\nThe driver did not handle failure of `netdev_alloc_skb_ip_align()`.\nIf the allocation failed, dereferencing `skb->protocol` could lead to\na NULL pointer dereference.\n\nThis patch tries to allocate `skb`. If the allocation fails, it falls\nback to the normal path.\n\nTested-on: D-Link DGE-550T Rev-A3\n\n## Affected\n\n- `Linux >= 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 < 84fd710a704f3d53d4120e452e86cea558cf73a8`\n- `Linux >= 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 < 5aa9b885602811a026a3f45c92ea2b4b04c54f09`\n- `Linux >= 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 < 9d49e4b14609e1a20d931e718962c4b6b5485174`\n- `Linux >= 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 < ea87151df398d407a632c7bf63013290f01c5009`\n- `Linux >= 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 < 7ed5010fef0930f4322d620052edc854ef3ec41f`\n- `Linux >= 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 < fd7b6b2c920d7fd370a612be416a904d6e1ebe55`\n- `Linux >= 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 < 8169a6011c5fecc6cb1c3654c541c567d3318de8`\n- `Linux 2.6.12`\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.","depth":"twilight","depthScore":41,"depthScoreParts":{"impact":41.3,"likelihood":0.1,"exploitation":0,"ransomware":0},"changes":[]}