CVE-2022-50241
published 2025-09-15CVE-2022-50241: 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…
PriorityP340high7.8CVSS 3.1
AVLACLPRLUINSUCHIHAH
EPSS
0.15%
4.6th percentile
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_cp_stateids list before freeing the lock state's stid.
However, sometimes the CLOSE was sent before the FREE_STATEID request.
When this happens, the nfsd4_close_open_stateid call from nfsd4_close
frees all lock states on its st_locks list without cleaning up the copy
state on the sc_cp_list list. When the time the FREE_STATEID arrives the
server returns BAD_STATEID since the lock state was freed. This causes
the use-after-free error to occur when the laundromat tries to free
the expired cpntf_state.
This patch adds a call to nfs4_free_cpntf_statelist in
nfsd4_close_open_stateid to clean up the copy state before calling
free_ol_stateid_reaplist to free the lock state's stid on the reaplist.
Affected
15 ranges
| Vendor | Product | Version range | Fixed in |
|---|---|---|---|
| debian | linux | < linux 6.0.3-1 (bookworm) | linux 6.0.3-1 (bookworm) |
| linux | linux | — | — |
| linux | linux | >= 624322f1adc58acd0b69f77a6ddc764207e97241 < bbacfcde5fff25ac22597e8373a065c647da6738 | bbacfcde5fff25ac22597e8373a065c647da6738 |
| linux | linux | >= 624322f1adc58acd0b69f77a6ddc764207e97241 < 83b94969751a691347606dbe6b1865efcfa5a643 | 83b94969751a691347606dbe6b1865efcfa5a643 |
| linux | linux | >= 624322f1adc58acd0b69f77a6ddc764207e97241 < 6ea71246b7a02af675d733e72d14bd0d591d5f4a | 6ea71246b7a02af675d733e72d14bd0d591d5f4a |
| linux | linux | >= 624322f1adc58acd0b69f77a6ddc764207e97241 < 35aa0fb8c3033a3d78603356e96fc18c5b9cceb2 | 35aa0fb8c3033a3d78603356e96fc18c5b9cceb2 |
| linux | linux | >= 624322f1adc58acd0b69f77a6ddc764207e97241 < 019805fea91599b22dfa62ffb29c022f35abeb06 | 019805fea91599b22dfa62ffb29c022f35abeb06 |
| linux | linux_kernel | < 5.10.150 | 5.10.150 |
| linux | linux_kernel | >= 0 < 5.10.158-1 | 5.10.158-1 |
| linux | linux_kernel | >= 0 < 6.0.3-1 | 6.0.3-1 |
| linux | linux_kernel | >= 0 < 6.0.3-1 | 6.0.3-1 |
| linux | linux_kernel | >= 0 < 6.0.3-1 | 6.0.3-1 |
| linux | linux_kernel | >= 5.11 < 5.15.75 | 5.15.75 |
| linux | linux_kernel | >= 5.16 < 5.19.17 | 5.19.17 |
| linux | linux_kernel | >= 6.0 < 6.0.3 | 6.0.3 |
CVSS provenance
nvdv3.17.8HIGHCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
osv7.8HIGH
vendor_debian7.8HIGH
vendor_redhat7.8HIGH
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Red Hat
kernel: NFSD: fix use-after-free on source server when doing inter-server copy
vendor_redhat·2025-09-15·CVSS 7.8
CVE-2022-50241 [HIGH] CWE-416 kernel: NFSD: fix use-after-free on source server when doing inter-server copy
kernel: NFSD: fix use-after-free on source server when doing inter-server copy
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_cp_stateids list before freeing the lock state's stid.
However, sometimes the CLOSE was sent before the FREE_STATEID request
Debian
CVE-2022-50241: linux - In the Linux kernel, the following vulnerability has been resolved: NFSD: fix u...
vendor_debian·2022·CVSS 7.8
CVE-2022-50241 [HIGH] CVE-2022-50241: linux - In the Linux kernel, the following vulnerability has been resolved: NFSD: fix u...
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_cp_stateids list before freeing the lock state's stid. However, sometimes the CLOSE was sent before the FREE_STATEID request. When this happens, the nfsd4_close_open_stateid call from nfsd4_close frees al
OSV
CVE-2022-50241: 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-f
osv·2025-09-15·CVSS 7.8
CVE-2022-50241 [HIGH] CVE-2022-50241: 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-f
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_cp_stateids list before freeing the lock state's stid. However, sometimes the CLOSE was sent before the FREE_STATEID request. When this happens, the nfsd4_close_open_stateid call from nfsd4_close frees al
GHSA
GHSA-wc22-wv2f-7f64: 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
ghsa_unreviewed·2025-09-15
CVE-2022-50241 [HIGH] CWE-416 GHSA-wc22-wv2f-7f64: 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
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_cp_stateids list before freeing the lock state's stid.
However, sometimes the CLOSE was sent before the FREE_STATEID request.
When this happens, the nfsd4_close_open_stateid call from nfsd4_close
free
No detection rules found.
No public exploits indexed.
https://git.kernel.org/stable/c/019805fea91599b22dfa62ffb29c022f35abeb06https://git.kernel.org/stable/c/35aa0fb8c3033a3d78603356e96fc18c5b9cceb2https://git.kernel.org/stable/c/6ea71246b7a02af675d733e72d14bd0d591d5f4ahttps://git.kernel.org/stable/c/83b94969751a691347606dbe6b1865efcfa5a643https://git.kernel.org/stable/c/bbacfcde5fff25ac22597e8373a065c647da6738
2025-09-15
Published