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Review reviewHigh

CVE-2022-50241

Linux Linux, linux kernel

In the Linux kernel, the following vulnerability has been resolved: NFSD: fix use-after-free on source server when doing inter-server copy Use-after-free occurred when the laundromat tried to free expired cpntf_state entry on the s2s_cp_stateids list after inter-server copy completed. The sc_cp_list that the expired copy state was inserted on was already freed. When COPY completes, the Linux client normally sends LOCKU(lock_state x), FREE_STATEID(lock_state x) and CLOSE(open_state y) to the source server. The nfs4_put_stid call from nfsd4_free_stateid cleans up the copy state from the s2s_c...

CVSS
7.8
EPSS
0.34%
26.6% percentile
CISA KEV
Not listed
Published
2025.09.15
PRIORITY ASSESSMENT

Review review

The CVSS severity warrants an early asset and exposure review.

Known exploitationNot established by KEV
Exploit probability0.34%
Technical severityCVSS 7.8

Vulnerability overview

In the Linux kernel, the following vulnerability has been resolved: NFSD: fix use-after-free on source server when doing inter-server copy Use-after-free occurred when the laundromat tried to free expired cpntf_state entry on the s2s_cp_stateids list after inter-server copy completed. The sc_cp_list that the expired copy state was inserted on was already freed. When COPY completes, the Linux client normally sends LOCKU(lock_state x), FREE_STATEID(lock_state x) and CLOSE(open_state y) to the source server. The nfs4_put_stid call from nfsd4_free_stateid cleans up the copy state from the s2s_c...

Affected product and versions

Product
Linux Linux, linux kernel
Affected versions
>= 624322f1adc58acd0b69f77a6ddc764207e97241 < bbacfcde5fff25ac22597e8373a065c647da6738, >= 624322f1adc58acd0b69f77a6ddc764207e97241 < 83b94969751a691347606dbe6b1865efcfa5a643, >= 624322f1adc58acd0b69f77a6ddc764207e97241 < 6ea71246b7a02af675d733e72d14bd0d591d5f4a, >= 624322f1adc58acd0b69f77a6ddc764207e97241 < 35aa0fb8c3033a3d78603356e96fc18c5b9cceb2, >= 624322f1adc58acd0b69f77a6ddc764207e97241 < 019805fea91599b22dfa62ffb29c022f35abeb06, >= 5.6, < 5.10.150, >= 5.11 < 5.15.75, >= 5.16 < 5.19.17, >= 6.0 < 6.0.3
Fixed versions
5.10.150, 5.15.75, 5.19.17, 6.0.3

Recommended response sequence

Confirm exposure before applying a vendor-supported change.

Full remediation guide
  1. 1
    Identify

    Confirm that Linux Linux, linux kernel and an affected version are present.

  2. 2
    Prioritize

    Combine exploitation signals with asset exposure and business criticality.

  3. 3
    Remediate

    Follow the vendor advisory or supported update path and preserve rollback options.

  4. 4
    Verify

    Recheck the version, service health, access paths, and relevant logs.

Technical data

CVSS vector
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
CWE
CWE-416