{"cve":"CVE-2021-47438","nvd":{"published":"2024-05-22T07:15:09.080","modified":"2026-08-04T10:17:03.297","status":"Modified","description":"In the Linux kernel, the following vulnerability has been resolved:\n\nnet/mlx5e: Fix memory leak in mlx5_core_destroy_cq() error path\n\nPrior to this patch in case mlx5_core_destroy_cq() failed it returns\nwithout completing all destroy operations and that leads to memory leak.\nInstead, complete the destroy flow before return error.\n\nAlso move mlx5_debug_cq_remove() to the beginning of mlx5_core_destroy_cq()\nto be symmetrical with mlx5_core_create_cq().\n\nkmemleak complains on:\n\nunreferenced object 0xc000000038625100 (size 64):\n  comm \"ethtool\", pid 28301, jiffies 4298062946 (age 785.380s)\n  hex dump (first 32 bytes):\n    60 01 48 94 00 00 00 c0 b8 05 34 c3 00 00 00 c0  `.H.......4.....\n    02 00 00 00 00 00 00 00 00 db 7d c1 00 00 00 c0  ..........}.....\n  backtrace:\n    [<000000009e8643cb>] add_res_tree+0xd0/0x270 [mlx5_core]\n    [<00000000e7cb8e6c>] mlx5_debug_cq_add+0x5c/0xc0 [mlx5_core]\n    [<000000002a12918f>] mlx5_core_create_cq+0x1d0/0x2d0 [mlx5_core]\n    [<00000000cef0a696>] mlx5e_create_cq+0x210/0x3f0 [mlx5_core]\n    [<000000009c642c26>] mlx5e_open_cq+0xb4/0x130 [mlx5_core]\n    [<0000000058dfa578>] mlx5e_ptp_open+0x7f4/0xe10 [mlx5_core]\n    [<0000000081839561>] mlx5e_open_channels+0x9cc/0x13e0 [mlx5_core]\n    [<0000000009cf05d4>] mlx5e_switch_priv_channels+0xa4/0x230\n[mlx5_core]\n    [<0000000042bbedd8>] mlx5e_safe_switch_params+0x14c/0x300\n[mlx5_core]\n    [<0000000004bc9db8>] set_pflag_tx_port_ts+0x9c/0x160 [mlx5_core]\n    [<00000000a0553443>] mlx5e_set_priv_flags+0xd0/0x1b0 [mlx5_core]\n    [<00000000a8f3d84b>] ethnl_set_privflags+0x234/0x2d0\n    [<00000000fd27f27c>] genl_family_rcv_msg_doit+0x108/0x1d0\n    [<00000000f495e2bb>] genl_family_rcv_msg+0xe4/0x1f0\n    [<00000000646c5c2c>] genl_rcv_msg+0x78/0x120\n    [<00000000d53e384e>] netlink_rcv_skb+0x74/0x1a0","cvss_v4":null,"cvss_v3":{"version":"3.1","vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H","score":5.5},"cwes":["CWE-401"],"references":["https://git.kernel.org/stable/c/4f7bddf8c5c01cac74373443b13a68e1c6723a94","https://git.kernel.org/stable/c/94b960b9deffc02fc0747afc01f72cc62ab099e3","https://git.kernel.org/stable/c/ed8aafea4fec9c654e63445236e0b505e27ed3a7","https://git.kernel.org/stable/c/4f7bddf8c5c01cac74373443b13a68e1c6723a94","https://git.kernel.org/stable/c/94b960b9deffc02fc0747afc01f72cc62ab099e3"],"products":["linux:linux_kernel"],"source":"nvd","synced_at":"2026-10-19T21:50:30.954589733+00:00"},"epss":{"cve":"CVE-2021-47438","score":0.00235,"percentile":0.14558,"date":"2026-10-31"},"kev":null,"osv":[],"attribution":["This product uses the NVD API but is not endorsed or certified by the NVD.","EPSS scores: FIRST Exploit Prediction Scoring System, https://www.first.org/epss","Known exploited vulnerabilities: CISA Known Exploited Vulnerabilities Catalog, https://www.cisa.gov/known-exploited-vulnerabilities-catalog","Package advisories: OSV (https://osv.dev), from the GitHub Advisory Database, PyPA, Go, RustSec and other ecosystem databases, under CC-BY 4.0 or CC0","CVE records: the CVE Program's CVE List (https://www.cve.org), under its terms of use (https://www.cve.org/Legal/TermsOfUse). CVE is a registered trademark of The MITRE Corporation; this product is not affiliated with the CVE Program."]}