CVE-2021-47624— net/sunrpc: fix reference count leaks in rpc_sysfs_xprt_state_change
Affected Version Matrix 8
| Vendor | Product | Version Range | Status |
|---|---|---|---|
| Linux | Linux | 5b7eb78486cd9ac58bfbd6d84ea0fe2d9fead03b< 4b22aa42bd4d2d630ef1854c139275c3532937cb | affected |
5b7eb78486cd9ac58bfbd6d84ea0fe2d9fead03b< 5f6024c05a2c0fdd180b29395aaf686d25af3a0f | affected | ||
5b7eb78486cd9ac58bfbd6d84ea0fe2d9fead03b< 776d794f28c95051bc70405a7b1fa40115658a18 | affected | ||
5.14 | affected | ||
< 5.14 | unaffected | ||
5.15.24≤ 5.15.* | unaffected | ||
5.16.10≤ 5.16.* | unaffected | ||
5.17≤ * | unaffected |
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I. Basic Information for CVE-2021-47624
Vulnerability Information
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Vulnerability Title
net/sunrpc: fix reference count leaks in rpc_sysfs_xprt_state_change
Source: NVD (National Vulnerability Database)
Vulnerability Description
In the Linux kernel, the following vulnerability has been resolved: net/sunrpc: fix reference count leaks in rpc_sysfs_xprt_state_change The refcount leak issues take place in an error handling path. When the 3rd argument buf doesn't match with "offline", "online" or "remove", the function simply returns -EINVAL and forgets to decrease the reference count of a rpc_xprt object and a rpc_xprt_switch object increased by rpc_sysfs_xprt_kobj_get_xprt() and rpc_sysfs_xprt_kobj_get_xprt_switch(), causing reference count leaks of both unused objects. Fix this issue by jumping to the error handling path labelled with out_put when buf matches none of "offline", "online" or "remove".
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net/sunrpc模块中发现引用计数泄漏问题。在错误处理路径中，当第三个参数buf与offline、online或remove不匹配时，函数返回-EINVAL并忘记减少rpc_xprt对象和rpc_xprt_switch对象的引用计数。
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-2021-47624
| # | POC Description | Source Link | Shenlong Link |
|---|
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Other References for CVE-2021-47624 (2)
Same Patch Batch · Linux · 2024-07-16 · 98 CVEs total
| CVE-2022-48832 | audit: don't deref the syscall args when checking the openat2 open_how::flags | |
| CVE-2022-48826 | drm/vc4: Fix deadlock on DSI device attach error | |
| CVE-2022-48822 | usb: f_fs: Fix use-after-free for epfile | |
| CVE-2022-48821 | misc: fastrpc: avoid double fput() on failed usercopy | |
| CVE-2022-48819 | tcp: take care of mixed splice()/sendmsg(MSG_ZEROCOPY) case | |
| CVE-2022-48820 | phy: stm32: fix a refcount leak in stm32_usbphyc_pll_enable() | |
| CVE-2022-48818 | net: dsa: mv88e6xxx: don't use devres for mdiobus | |
| CVE-2022-48823 | scsi: qedf: Fix refcount issue when LOGO is received during TMF | |
| CVE-2022-48830 | can: isotp: fix potential CAN frame reception race in isotp_rcv() | |
| CVE-2022-48831 | ima: fix reference leak in asymmetric_verify() | |
| CVE-2022-48828 | NFSD: Fix ia_size underflow | |
| CVE-2022-48834 | usb: usbtmc: Fix bug in pipe direction for control transfers | |
| CVE-2022-48833 | btrfs: skip reserved bytes warning on unmount after log cleanup failure | |
| CVE-2022-48835 | scsi: mpt3sas: Page fault in reply q processing | |
| CVE-2022-48837 | usb: gadget: rndis: prevent integer overflow in rndis_set_response() | |
| CVE-2022-48836 | Input: aiptek - properly check endpoint type | |
| CVE-2022-48838 | usb: gadget: Fix use-after-free bug by not setting udc->dev.driver | |
| CVE-2022-48839 | net/packet: fix slab-out-of-bounds access in packet_recvmsg() | |
| CVE-2022-48840 | iavf: Fix hang during reboot/shutdown | |
| CVE-2022-48842 | ice: Fix race condition during interface enslave |
Showing top 20 of 98 CVEs. View all on vendor page → →
IV. Related Vulnerabilities
Same product: Linux
- CVE-2026-45836
Bluetooth: L2CAP: Fix null-ptr-deref in l2cap_sock_get_sndti - CVE-2026-45835
Bluetooth: L2CAP: Fix null-ptr-deref in l2cap_sock_new_conne - CVE-2026-45834
Bluetooth: L2CAP: Fix null-ptr-deref in l2cap_sock_state_cha - CVE-2026-46300
net: skbuff: preserve shared-frag marker during coalescing - CVE-2026-43503
net: skbuff: propagate shared-frag marker through frag-trans
Same vendor: Linux
- CVE-2026-45836
Bluetooth: L2CAP: Fix null-ptr-deref in l2cap_sock_get_sndti - CVE-2026-45835
Bluetooth: L2CAP: Fix null-ptr-deref in l2cap_sock_new_conne - CVE-2026-45834
Bluetooth: L2CAP: Fix null-ptr-deref in l2cap_sock_state_cha - CVE-2026-46300
net: skbuff: preserve shared-frag marker during coalescing - CVE-2026-43503
net: skbuff: propagate shared-frag marker through frag-trans
V. Comments for CVE-2021-47624
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