cbcvebase.
CVE-2025-21636
published 2025-01-19

CVE-2025-21636: In the Linux kernel, the following vulnerability has been resolved: sctp: sysctl: plpmtud_probe_interval: avoid using current->nsproxy As mentioned in a…

PriorityP421medium5.5CVSS 3.1
AVLACLPRLUINSUCNINAH
EPSS
0.21%
10.9th percentile
In the Linux kernel, the following vulnerability has been resolved: sctp: sysctl: plpmtud_probe_interval: avoid using current->nsproxy As mentioned in a previous commit of this series, using the 'net' structure via 'current' is not recommended for different reasons: - Inconsistency: getting info from the reader's/writer's netns vs only from the opener's netns. - current->nsproxy can be NULL in some cases, resulting in an 'Oops' (null-ptr-deref), e.g. when the current task is exiting, as spotted by syzbot [1] using acct(2). The 'net' structure can be obtained from the table->data using container_of(). Note that table->data could also be used directly, as this is the only member needed from the 'net' structure, but that would increase the size of this fix, to use '*data' everywhere 'net->sctp.probe_interval' is used.

Affected

18 ranges
VendorProductVersion rangeFixed in
debianlinux< linux 6.1.128-1 (bookworm)linux 6.1.128-1 (bookworm)
debianlinux-6.1< linux 6.1.128-1 (bookworm)linux 6.1.128-1 (bookworm)
linuxlinux
linuxlinux>= d1e462a7a5f359cbb9a0e8fbfafcfb6657034105 < 1dc5da6c4178f3e4b95c631418f72de9f86c04491dc5da6c4178f3e4b95c631418f72de9f86c0449
linuxlinux>= d1e462a7a5f359cbb9a0e8fbfafcfb6657034105 < 44ee8635922b6eb940faddb961a8347c6857d72244ee8635922b6eb940faddb961a8347c6857d722
linuxlinux>= d1e462a7a5f359cbb9a0e8fbfafcfb6657034105 < 284a221f8fa503628432c7bb5108277c688c6ffa284a221f8fa503628432c7bb5108277c688c6ffa
linuxlinux>= d1e462a7a5f359cbb9a0e8fbfafcfb6657034105 < bcf8c60074e81ed2ac2d35130917175a3949c917bcf8c60074e81ed2ac2d35130917175a3949c917
linuxlinux>= d1e462a7a5f359cbb9a0e8fbfafcfb6657034105 < 6259d2484d0ceff42245d1f09cc8cb6ee72d847a6259d2484d0ceff42245d1f09cc8cb6ee72d847a
linuxlinux_kernel
linuxlinux_kernel>= 0 < 6.1.128-16.1.128-1
linuxlinux_kernel>= 0 < 6.12.10-16.12.10-1
linuxlinux_kernel>= 0 < 6.12.10-16.12.10-1
linuxlinux_kernel>= 0 < 5.15.0-135.1465.15.0-135.146
linuxlinux_kernel>= 0 < 6.8.0-60.636.8.0-60.63
linuxlinux_kernel>= 5.14 < 5.15.1775.15.177
linuxlinux_kernel>= 5.16 < 6.1.1256.1.125
linuxlinux_kernel>= 6.2 < 6.6.726.6.72
linuxlinux_kernel>= 6.7 < 6.12.106.12.10

CVSS provenance

nvdv3.15.5MEDIUMCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
osv7.8HIGH
vendor_ubuntu7.8HIGH
vendor_debian5.5MEDIUM
vendor_redhat5.5MEDIUM
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