CVE-2025-23131 | In the Linux kernel, the following vulnerability has been resolved: dlm: prevent NPD when writing a positive value to event_done do_uevent returns the value written to event_done. In case it is a positive value, new_lockspace would undo all the work, and lockspace would not be set. __dlm_new_lockspace, however, would treat that positive value as a success due to commit 8511a2728ab8 ("dlm: fix use count with multiple joins"). Down the line, device_create_lo
In the Linux kernel, the following vulnerability has been resolved:
dlm: prevent NPD when writing a positive value to event_done
do_uevent returns the value written to event_done. In case it is a
positive value, new_lockspace would undo all the work, and lockspace
would not be set. __dlm_new_lockspace, however, would treat that
positive value as a success due to commit 8511a2728ab8 ("dlm: fix use
count with multiple joins").
Down the line, device_create_lockspace would pass that NULL lockspace to
dlm_find_lockspace_local, leading to a NULL pointer dereference.
Treating such positive values as successes prevents the problem. Given
this has been broken for so long, this is unlikely to break userspace
expectations.
- 🔗 git.kernel.org/stable/c/a1c41aebb184d9228a440dcb6761224e…
- 🔗 git.kernel.org/stable/c/ee28d99d789b077565cbe0377374d1e8…
- 🔗 git.kernel.org/stable/c/c7837e2c96559663c33f43da403d9cf3…
- 🔗 git.kernel.org/stable/c/7109d69bec6edce546dc870e66bd2b66…
- 🔗 git.kernel.org/stable/c/10b7a59814765d18d43555c9cef4eb30…
- 🔗 git.kernel.org/stable/c/b73c4ad4d387fe5bc988145bd9f1bc0d…
- 🔗 git.kernel.org/stable/c/8e2bad543eca5c25cd02cbc63d725579…
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CVE-2025-23131 | In the Linux kernel, the following vulnerability has been resolved: dlm: prevent NPD when writing a positive value to event_done do_uevent returns the value written to event_done. In case it is a positive value, new_lockspace would undo all the work, and lockspace would not be set. __dlm_new_lockspace, however, would treat that positive value as a success due to commit 8511a2728ab8 ("dlm: fix use count with multiple joins"). Down the line, device_create_lo
In the Linux kernel, the following vulnerability has been resolved: dlm: prevent NPD when writing a positive value to event_done do_uevent returns the value written to event_done. In case it is a positive value, new_lockspace would undo a