cbcvebase.
CVE-2025-21640
published 2025-01-19

CVE-2025-21640: In the Linux kernel, the following vulnerability has been resolved: sctp: sysctl: cookie_hmac_alg: avoid using current->nsproxy As mentioned in a previous…

PriorityP421medium5.5CVSS 3.1
AVLACLPRLUINSUCNINAH
EPSS
0.23%
14.1th percentile
In the Linux kernel, the following vulnerability has been resolved: sctp: sysctl: cookie_hmac_alg: 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.sctp_hmac_alg' is used.

Affected

26 ranges· showing 25
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>= 3c68198e75111a905ac2412be12bf7b29099729b < 5599b212d2f4466e1832a94e9932684aaa3645875599b212d2f4466e1832a94e9932684aaa364587
linuxlinux>= 3c68198e75111a905ac2412be12bf7b29099729b < 03ca51faba2b017bf6c90e139434c4117d0afcdc03ca51faba2b017bf6c90e139434c4117d0afcdc
linuxlinux>= 3c68198e75111a905ac2412be12bf7b29099729b < 86ddf8118123cb58a0fb8724cad6979c4069065b86ddf8118123cb58a0fb8724cad6979c4069065b
linuxlinux>= 3c68198e75111a905ac2412be12bf7b29099729b < 3cd0659deb9c03535fd61839e91d4d4d3e51ac713cd0659deb9c03535fd61839e91d4d4d3e51ac71
linuxlinux>= 3c68198e75111a905ac2412be12bf7b29099729b < ad673e514b2793b8d5902f6ba6ab7e890dea23d5ad673e514b2793b8d5902f6ba6ab7e890dea23d5
linuxlinux>= 3c68198e75111a905ac2412be12bf7b29099729b < f0bb3935470684306e4e04793a20ac4c4b08de0bf0bb3935470684306e4e04793a20ac4c4b08de0b
linuxlinux>= 3c68198e75111a905ac2412be12bf7b29099729b < ea62dd1383913b5999f3d16ae99d411f41b528d4ea62dd1383913b5999f3d16ae99d411f41b528d4
linuxlinux_kernel
linuxlinux_kernel
linuxlinux_kernel
linuxlinux_kernel
linuxlinux_kernel
linuxlinux_kernel
linuxlinux_kernel>= 0 < 5.10.234-15.10.234-1
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 < 5.4.0-211.2315.4.0-211.231
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>= 3.8 < 6.1.1256.1.125
linuxlinux_kernel>= 6.2 < 6.6.726.6.72

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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