CVE-2024-53173: NFSv4.0: Fix a use-after-free problem in the asynchronous open()

Severity: high (CVSS 7.8 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.3% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2024-12-27 · updated 2026-06-17
Weakness: CWE-416

Description

In the Linux kernel, the following vulnerability has been resolved: NFSv4.0: Fix a use-after-free problem in the asynchronous open() Yang Erkun reports that when two threads are opening files at the same time, and are forced to abort before a reply is seen, then the call to nfs_release_seqid() in nfs4_opendata_free() can result in a use-after-free of the pointer to the defunct rpc task of the other thread. The fix is to ensure that if the RPC call is aborted before the call to nfs_wait_on_sequence() is complete, then we must call nfs_release_seqid() in nfs4_open_release() before the rpc_task is freed.

Affected products

Linux kernel: from 2.6.16 before 4.19.325; from 4.20 before 5.4.287; from 5.5 before 5.10.231; from 5.11 before 5.15.174; from 5.16 before 6.1.120; from 6.2 before 6.6.64 — fixed in 4.19.325, 5.10.231, 5.15.174, 5.4.287, 6.1.120, 6.11.11

How to fix

Upgrade to a fixed version: Linux kernel 4.19.325, 5.10.231, 5.15.174, 5.4.287. Check the vendor advisory for mitigations.

References

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