CVE-2022-50457— mtd: core: Fix refcount error in del_mtd_device()
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I. Basic Information for CVE-2022-50457
Vulnerability Information
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Vulnerability Title
mtd: core: Fix refcount error in del_mtd_device()
Source: NVD (National Vulnerability Database)
Vulnerability Description
In the Linux kernel, the following vulnerability has been resolved: mtd: core: Fix refcount error in del_mtd_device() del_mtd_device() will call of_node_put() to mtd_get_of_node(mtd), which is mtd->dev.of_node. However, memset(&mtd->dev, 0) is called before of_node_put(). As the result, of_node_put() won't do anything in del_mtd_device(), and causes the refcount leak. del_mtd_device() memset(&mtd->dev, 0, sizeof(mtd->dev) # clear mtd->dev of_node_put() mtd_get_of_node(mtd) # mtd->dev is cleared, can't locate of_node # of_node_put(NULL) won't do anything Fix the error by caching the pointer of the device_node. OF: ERROR: memory leak, expected refcount 1 instead of 2, of_node_get()/of_node_put() unbalanced - destroy cset entry: attach overlay node /spi/spi-sram@0 CPU: 3 PID: 275 Comm: python3 Tainted: G N 6.1.0-rc3+ #54 0d8a1edddf51f172ff5226989a7565c6313b08e2 Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.15.0-0-g2dd4b9b3f840-prebuilt.qemu.org 04/01/2014 Call Trace: <TASK> dump_stack_lvl+0x67/0x83 kobject_get+0x155/0x160 of_node_get+0x1f/0x30 of_fwnode_get+0x43/0x70 fwnode_handle_get+0x54/0x80 fwnode_get_nth_parent+0xc9/0xe0 fwnode_full_name_string+0x3f/0xa0 device_node_string+0x30f/0x750 pointer+0x598/0x7a0 vsnprintf+0x62d/0x9b0 ... cfs_overlay_release+0x30/0x90 config_item_release+0xbe/0x1a0 config_item_put+0x5e/0x80 configfs_rmdir+0x3bd/0x540 vfs_rmdir+0x18c/0x320 do_rmdir+0x198/0x330 __x64_sys_rmdir+0x2c/0x40 do_syscall_64+0x37/0x90 entry_SYSCALL_64_after_hwframe+0x63/0xcd [<miquel.raynal@bootlin.com>: Light reword of the commit log]
Source: NVD (National Vulnerability Database)
CVSS Information
N/A
Source: NVD (National Vulnerability Database)
Vulnerability Type
N/A
Source: NVD (National Vulnerability Database)
Vulnerability Title
Linux kernel 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Linux kernel是美国Linux基金会的开源操作系统Linux所使用的内核。 Linux kernel存在安全漏洞，该漏洞源于del_mtd_device函数中设备节点引用计数处理不当，可能导致内存泄漏。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)
Affected Products
II. Public POCs for CVE-2022-50457
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Same Patch Batch · Linux · 2025-10-01 · 169 CVEs total
| CVE-2022-50462 | MIPS: vpe-mt: fix possible memory leak while module exiting | |
| CVE-2022-50448 | mm/uffd: fix warning without PTE_MARKER_UFFD_WP compiled in | |
| CVE-2022-50452 | net: sched: cake: fix null pointer access issue when cake_init() fails | |
| CVE-2022-50451 | fs/ntfs3: Fix memory leak on ntfs_fill_super() error path | |
| CVE-2022-50453 | gpiolib: cdev: fix NULL-pointer dereferences | |
| CVE-2022-50454 | drm/nouveau: fix a use-after-free in nouveau_gem_prime_import_sg_table() | |
| CVE-2022-50456 | btrfs: fix resolving backrefs for inline extent followed by prealloc | |
| CVE-2022-50458 | clk: tegra: Fix refcount leak in tegra210_clock_init | |
| CVE-2022-50460 | cifs: Fix xid leak in cifs_flock() | |
| CVE-2022-50459 | scsi: iscsi: iscsi_tcp: Fix null-ptr-deref while calling getpeername() | |
| CVE-2022-50461 | net: ethernet: ti: am65-cpsw: Fix PM runtime leakage in am65_cpsw_nuss_ndo_slave_open() | |
| CVE-2022-50467 | scsi: lpfc: Fix null ndlp ptr dereference in abnormal exit path for GFT_ID | |
| CVE-2023-53488 | IB/hfi1: Fix possible panic during hotplug remove | |
| CVE-2023-53489 | tcp/udp: Fix memleaks of sk and zerocopy skbs with TX timestamp. | |
| CVE-2022-50469 | staging: rtl8723bs: fix potential memory leak in rtw_init_drv_sw() | |
| CVE-2022-50468 | platform/chrome: cros_usbpd_notify: Fix error handling in cros_usbpd_notify_init() | |
| CVE-2022-50465 | ext4: fix leaking uninitialized memory in fast-commit journal | |
| CVE-2022-50463 | powerpc/52xx: Fix a resource leak in an error handling path | |
| CVE-2022-50464 | mt76: mt7915: Fix PCI device refcount leak in mt7915_pci_init_hif2() | |
| CVE-2022-50449 | clk: samsung: Fix memory leak in _samsung_clk_register_pll() |
Showing top 20 of 169 CVEs. View all on vendor page → →
IV. Related Vulnerabilities
Same product: Linux
- CVE-2026-43500
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scsi: storvsc: Fix scheduling while atomic on PREEMPT_RT - CVE-2026-43474
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scsi: mpi3mr: Add NULL checks when resetting request and rep - CVE-2026-43472
unshare: fix unshare_fs() handling
Same vendor: Linux
- CVE-2026-43500
rxrpc: Also unshare DATA/RESPONSE packets when paged frags a - CVE-2026-43475
scsi: storvsc: Fix scheduling while atomic on PREEMPT_RT - CVE-2026-43474
fs: init flags_valid before calling vfs_fileattr_get - CVE-2026-43473
scsi: mpi3mr: Add NULL checks when resetting request and rep - CVE-2026-43472
unshare: fix unshare_fs() handling
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