CVE-2021-47624
Last modified
CVE-2021-47624 is a high-severity vulnerability rated 7.1/10 on the CVSS scale. 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".. EPSS estimates a 0.24% chance of exploitation in the next 30 days.
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".
Metrics
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:H
Affected Software
| Vendor | Product | Versions |
|---|---|---|
| Linux | Linux Kernel | < 5.15.24 |
| Linux | Linux Kernel | >= 5.16, < 5.16.10 |
References
- https://git.kernel.org/stable/c/4b22aa42bd4d2d630ef1854c139275c3532937cbMailing List, Patch
- https://git.kernel.org/stable/c/5f6024c05a2c0fdd180b29395aaf686d25af3a0fMailing List, Patch
- https://git.kernel.org/stable/c/776d794f28c95051bc70405a7b1fa40115658a18Mailing List, Patch
- https://git.kernel.org/stable/c/4b22aa42bd4d2d630ef1854c139275c3532937cbMailing List, Patch
- https://git.kernel.org/stable/c/5f6024c05a2c0fdd180b29395aaf686d25af3a0fMailing List, Patch
- https://git.kernel.org/stable/c/776d794f28c95051bc70405a7b1fa40115658a18Mailing List, Patch
Timeline
- Published
- Last Modified
- Status
- Modified
Frequently Asked Questions
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How Strix Helps
- How Strix found a critical auth bypass in etcdStrix autonomously discovered a critical authentication bypass in etcd, later designated CVE-2026-33413.
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