{"id":"CVE-2022-50477","title":"rtc: class: Fix potential memleak in devm_rtc_allocate_device()","summary":"In the Linux kernel, the following vulnerability has been resolved:\n\nrtc: class: Fix potential memleak in devm_rtc_allocate_device()\n\ndevm_rtc_allocate_device() will alloc a rtc_device first, and then run\ndev_set_name(). If dev_set_name(…","severity":"none","vendor":"Linux","product":"Linux","affected":["Linux >= 24d23181e43d72ca692a479e70dfe5b0b5dd33f1 < 0bcfc8fd3e596994f527b46730579428b3a4fa5f","Linux >= 24d23181e43d72ca692a479e70dfe5b0b5dd33f1 < 59457a0f079eae19aaf322b3cc1c8ba66f55c5f3","Linux >= 24d23181e43d72ca692a479e70dfe5b0b5dd33f1 < 60da73808298ff2cfa9f165d55eb3d7aa7078601","Linux 5.16"],"ssvc":{"exploitation":"none","automatable":"no","technicalImpact":"partial","timestamp":"2026-11-05T20:11:55.370621Z"},"published":"2025-10-04","updated":"2026-11-05","sourceUpdated":"2026-11-05T20:20:48.125Z","source":"CVEORG","sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2022-50477","references":[{"url":"https://git.kernel.org/stable/c/0bcfc8fd3e596994f527b46730579428b3a4fa5f"},{"url":"https://git.kernel.org/stable/c/59457a0f079eae19aaf322b3cc1c8ba66f55c5f3"},{"url":"https://git.kernel.org/stable/c/60da73808298ff2cfa9f165d55eb3d7aa7078601"}],"tags":["cve.org"],"epss":0.00157,"epssPercentile":0.04885,"ingestedAt":"2026-11-05T22:38:31.742Z","slug":"CVE-2022-50477","body":"## Overview\n\nIn the Linux kernel, the following vulnerability has been resolved:\n\nrtc: class: Fix potential memleak in devm_rtc_allocate_device()\n\ndevm_rtc_allocate_device() will alloc a rtc_device first, and then run\ndev_set_name(). If dev_set_name() failed, the rtc_device will memleak.\nMove devm_add_action_or_reset() in front of dev_set_name() to prevent\nmemleak.\n\nunreferenced object 0xffff888110a53000 (size 2048):\n  comm \"python3\", pid 470, jiffies 4296078308 (age 58.882s)\n  hex dump (first 32 bytes):\n    00 00 00 00 00 00 00 00 08 30 a5 10 81 88 ff ff  .........0......\n    08 30 a5 10 81 88 ff ff 00 00 00 00 00 00 00 00  .0..............\n  backtrace:\n    [<000000004aac0364>] kmalloc_trace+0x21/0x110\n    [<000000000ff02202>] devm_rtc_allocate_device+0xd4/0x400\n    [<000000001bdf5639>] devm_rtc_device_register+0x1a/0x80\n    [<00000000351bf81c>] rx4581_probe+0xdd/0x110 [rtc_rx4581]\n    [<00000000f0eba0ae>] spi_probe+0xde/0x130\n    [<00000000bff89ee8>] really_probe+0x175/0x3f0\n    [<00000000128e8d84>] __driver_probe_device+0xe6/0x170\n    [<00000000ee5bf913>] device_driver_attach+0x32/0x80\n    [<00000000f3f28f92>] bind_store+0x10b/0x1a0\n    [<000000009ff812d8>] drv_attr_store+0x49/0x70\n    [<000000008139c323>] sysfs_kf_write+0x8d/0xb0\n    [<00000000b6146e01>] kernfs_fop_write_iter+0x214/0x2d0\n    [<00000000ecbe3895>] vfs_write+0x61a/0x7d0\n    [<00000000aa2196ea>] ksys_write+0xc8/0x190\n    [<0000000046a600f5>] do_syscall_64+0x37/0x90\n    [<00000000541a336f>] entry_SYSCALL_64_after_hwframe+0x63/0xcd\n\n## Affected\n\n- `Linux >= 24d23181e43d72ca692a479e70dfe5b0b5dd33f1 < 0bcfc8fd3e596994f527b46730579428b3a4fa5f`\n- `Linux >= 24d23181e43d72ca692a479e70dfe5b0b5dd33f1 < 59457a0f079eae19aaf322b3cc1c8ba66f55c5f3`\n- `Linux >= 24d23181e43d72ca692a479e70dfe5b0b5dd33f1 < 60da73808298ff2cfa9f165d55eb3d7aa7078601`\n- `Linux 5.16`\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.","depth":"sunlit","depthScore":3,"depthScoreParts":{"impact":2.8,"likelihood":0,"exploitation":0,"ransomware":0},"changes":[]}