CVE-2025-21716

Source
https://nvd.nist.gov/vuln/detail/CVE-2025-21716
Import Source
https://storage.googleapis.com/osv-test-cve-osv-conversion/osv-output/CVE-2025-21716.json
JSON Data
https://api.test.osv.dev/v1/vulns/CVE-2025-21716
Downstream
Related
Published
2025-02-27T02:07:26Z
Modified
2025-10-17T22:25:16.960975Z
Severity
  • 5.5 (Medium) CVSS_V3 - CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H CVSS Calculator
Summary
vxlan: Fix uninit-value in vxlan_vnifilter_dump()
Details

In the Linux kernel, the following vulnerability has been resolved:

vxlan: Fix uninit-value in vxlanvnifilterdump()

KMSAN reported an uninit-value access in vxlanvnifilterdump() [1].

If the length of the netlink message payload is less than sizeof(struct tunnelmsg), vxlanvnifilter_dump() accesses bytes beyond the message. This can lead to uninit-value access. Fix this by returning an error in such situations.

[1] BUG: KMSAN: uninit-value in vxlanvnifilterdump+0x328/0x920 drivers/net/vxlan/vxlanvnifilter.c:422 vxlanvnifilterdump+0x328/0x920 drivers/net/vxlan/vxlanvnifilter.c:422 rtnldumpit+0xd5/0x2f0 net/core/rtnetlink.c:6786 netlinkdump+0x93e/0x15f0 net/netlink/afnetlink.c:2317 netlinkdumpstart+0x716/0xd60 net/netlink/afnetlink.c:2432 netlinkdumpstart include/linux/netlink.h:340 [inline] rtnetlinkdumpstart net/core/rtnetlink.c:6815 [inline] rtnetlinkrcvmsg+0x1256/0x14a0 net/core/rtnetlink.c:6882 netlinkrcvskb+0x467/0x660 net/netlink/afnetlink.c:2542 rtnetlinkrcv+0x35/0x40 net/core/rtnetlink.c:6944 netlinkunicastkernel net/netlink/afnetlink.c:1321 [inline] netlinkunicast+0xed6/0x1290 net/netlink/afnetlink.c:1347 netlinksendmsg+0x1092/0x1230 net/netlink/afnetlink.c:1891 socksendmsgnosec net/socket.c:711 [inline] _socksendmsg+0x330/0x3d0 net/socket.c:726 _syssendmsg+0x7f4/0xb50 net/socket.c:2583 _syssendmsg+0x271/0x3b0 net/socket.c:2637 _syssendmsg net/socket.c:2669 [inline] _dosyssendmsg net/socket.c:2674 [inline] _sesyssendmsg net/socket.c:2672 [inline] _x64syssendmsg+0x211/0x3e0 net/socket.c:2672 x64syscall+0x3878/0x3d90 arch/x86/include/generated/asm/syscalls64.h:47 dosyscallx64 arch/x86/entry/common.c:52 [inline] dosyscall64+0xd9/0x1d0 arch/x86/entry/common.c:83 entrySYSCALL64afterhwframe+0x77/0x7f

Uninit was created at: slabpostallochook mm/slub.c:4110 [inline] slaballocnode mm/slub.c:4153 [inline] kmemcacheallocnodenoprof+0x800/0xe80 mm/slub.c:4205 kmallocreserve+0x13b/0x4b0 net/core/skbuff.c:587 allocskb+0x347/0x7d0 net/core/skbuff.c:678 allocskb include/linux/skbuff.h:1323 [inline] netlinkalloclargeskb+0xa5/0x280 net/netlink/afnetlink.c:1196 netlinksendmsg+0xac9/0x1230 net/netlink/afnetlink.c:1866 socksendmsgnosec net/socket.c:711 [inline] _socksendmsg+0x330/0x3d0 net/socket.c:726 syssendmsg+0x7f4/0xb50 net/socket.c:2583 _syssendmsg+0x271/0x3b0 net/socket.c:2637 _syssendmsg net/socket.c:2669 [inline] _dosyssendmsg net/socket.c:2674 [inline] _sesyssendmsg net/socket.c:2672 [inline] _x64syssendmsg+0x211/0x3e0 net/socket.c:2672 x64syscall+0x3878/0x3d90 arch/x86/include/generated/asm/syscalls64.h:47 dosyscallx64 arch/x86/entry/common.c:52 [inline] dosyscall64+0xd9/0x1d0 arch/x86/entry/common.c:83 entrySYSCALL64afterhwframe+0x77/0x7f

CPU: 0 UID: 0 PID: 30991 Comm: syz.4.10630 Not tainted 6.12.0-10694-gc44daa7e3c73 #29 Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.16.3-3.fc41 04/01/2014

References

Affected packages

Git / git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git

Affected ranges

Type
GIT
Repo
https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
Events
Introduced
f9c4bb0b245cee35ef66f75bf409c9573d934cf9
Fixed
cb1de9309a48cc5b771115781eec05075fd67039
Type
GIT
Repo
https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
Events
Introduced
f9c4bb0b245cee35ef66f75bf409c9573d934cf9
Fixed
a84d511165d6ba7f331b90ae6b6ce180ec534daa
Type
GIT
Repo
https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
Events
Introduced
f9c4bb0b245cee35ef66f75bf409c9573d934cf9
Fixed
f554bce488605d2f70e06eeab5e4d2448c813713
Type
GIT
Repo
https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
Events
Introduced
f9c4bb0b245cee35ef66f75bf409c9573d934cf9
Fixed
1693d1fade71646a0731b6b213298cb443d186ea
Type
GIT
Repo
https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
Events
Introduced
f9c4bb0b245cee35ef66f75bf409c9573d934cf9
Fixed
5066293b9b7046a906eff60e3949a887ae185a43

Affected versions

v5.*

v5.17
v5.17-rc6
v5.17-rc7
v5.17-rc8
v5.18
v5.18-rc1
v5.18-rc2
v5.18-rc3
v5.18-rc4
v5.18-rc5
v5.18-rc6
v5.18-rc7
v5.19
v5.19-rc1
v5.19-rc2
v5.19-rc3
v5.19-rc4
v5.19-rc5
v5.19-rc6
v5.19-rc7
v5.19-rc8

v6.*

v6.0
v6.0-rc1
v6.0-rc2
v6.0-rc3
v6.0-rc4
v6.0-rc5
v6.0-rc6
v6.0-rc7
v6.1
v6.1-rc1
v6.1-rc2
v6.1-rc3
v6.1-rc4
v6.1-rc5
v6.1-rc6
v6.1-rc7
v6.1-rc8
v6.1.1
v6.1.10
v6.1.100
v6.1.101
v6.1.102
v6.1.103
v6.1.104
v6.1.105
v6.1.106
v6.1.107
v6.1.108
v6.1.109
v6.1.11
v6.1.110
v6.1.111
v6.1.112
v6.1.113
v6.1.114
v6.1.115
v6.1.116
v6.1.117
v6.1.118
v6.1.119
v6.1.12
v6.1.120
v6.1.121
v6.1.122
v6.1.123
v6.1.124
v6.1.125
v6.1.126
v6.1.127
v6.1.128
v6.1.13
v6.1.14
v6.1.15
v6.1.16
v6.1.17
v6.1.18
v6.1.19
v6.1.2
v6.1.20
v6.1.21
v6.1.22
v6.1.23
v6.1.24
v6.1.25
v6.1.26
v6.1.27
v6.1.28
v6.1.29
v6.1.3
v6.1.30
v6.1.31
v6.1.32
v6.1.33
v6.1.34
v6.1.35
v6.1.36
v6.1.37
v6.1.38
v6.1.39
v6.1.4
v6.1.40
v6.1.41
v6.1.42
v6.1.43
v6.1.44
v6.1.45
v6.1.46
v6.1.47
v6.1.48
v6.1.49
v6.1.5
v6.1.50
v6.1.51
v6.1.52
v6.1.53
v6.1.54
v6.1.55
v6.1.56
v6.1.57
v6.1.58
v6.1.59
v6.1.6
v6.1.60
v6.1.61
v6.1.62
v6.1.63
v6.1.64
v6.1.65
v6.1.66
v6.1.67
v6.1.68
v6.1.69
v6.1.7
v6.1.70
v6.1.71
v6.1.72
v6.1.73
v6.1.74
v6.1.75
v6.1.76
v6.1.77
v6.1.78
v6.1.79
v6.1.8
v6.1.80
v6.1.81
v6.1.82
v6.1.83
v6.1.84
v6.1.85
v6.1.86
v6.1.87
v6.1.88
v6.1.89
v6.1.9
v6.1.90
v6.1.91
v6.1.92
v6.1.93
v6.1.94
v6.1.95
v6.1.96
v6.1.97
v6.1.98
v6.1.99
v6.10
v6.10-rc1
v6.10-rc2
v6.10-rc3
v6.10-rc4
v6.10-rc5
v6.10-rc6
v6.10-rc7
v6.11
v6.11-rc1
v6.11-rc2
v6.11-rc3
v6.11-rc4
v6.11-rc5
v6.11-rc6
v6.11-rc7
v6.12
v6.12-rc1
v6.12-rc2
v6.12-rc3
v6.12-rc4
v6.12-rc5
v6.12-rc6
v6.12-rc7
v6.12.1
v6.12.10
v6.12.11
v6.12.12
v6.12.2
v6.12.3
v6.12.4
v6.12.5
v6.12.6
v6.12.7
v6.12.8
v6.12.9
v6.13
v6.13-rc1
v6.13-rc2
v6.13-rc3
v6.13-rc4
v6.13-rc5
v6.13-rc6
v6.13-rc7
v6.13.1
v6.2
v6.2-rc1
v6.2-rc2
v6.2-rc3
v6.2-rc4
v6.2-rc5
v6.2-rc6
v6.2-rc7
v6.2-rc8
v6.3
v6.3-rc1
v6.3-rc2
v6.3-rc3
v6.3-rc4
v6.3-rc5
v6.3-rc6
v6.3-rc7
v6.4
v6.4-rc1
v6.4-rc2
v6.4-rc3
v6.4-rc4
v6.4-rc5
v6.4-rc6
v6.4-rc7
v6.5
v6.5-rc1
v6.5-rc2
v6.5-rc3
v6.5-rc4
v6.5-rc5
v6.5-rc6
v6.5-rc7
v6.6
v6.6-rc1
v6.6-rc2
v6.6-rc3
v6.6-rc4
v6.6-rc5
v6.6-rc6
v6.6-rc7
v6.6.1
v6.6.10
v6.6.11
v6.6.12
v6.6.13
v6.6.14
v6.6.15
v6.6.16
v6.6.17
v6.6.18
v6.6.19
v6.6.2
v6.6.20
v6.6.21
v6.6.22
v6.6.23
v6.6.24
v6.6.25
v6.6.26
v6.6.27
v6.6.28
v6.6.29
v6.6.3
v6.6.30
v6.6.31
v6.6.32
v6.6.33
v6.6.34
v6.6.35
v6.6.36
v6.6.37
v6.6.38
v6.6.39
v6.6.4
v6.6.40
v6.6.41
v6.6.42
v6.6.43
v6.6.44
v6.6.45
v6.6.46
v6.6.47
v6.6.48
v6.6.49
v6.6.5
v6.6.50
v6.6.51
v6.6.52
v6.6.53
v6.6.54
v6.6.55
v6.6.56
v6.6.57
v6.6.58
v6.6.59
v6.6.6
v6.6.60
v6.6.61
v6.6.62
v6.6.63
v6.6.64
v6.6.65
v6.6.66
v6.6.67
v6.6.68
v6.6.69
v6.6.7
v6.6.70
v6.6.71
v6.6.72
v6.6.73
v6.6.74
v6.6.75
v6.6.8
v6.6.9
v6.7
v6.7-rc1
v6.7-rc2
v6.7-rc3
v6.7-rc4
v6.7-rc5
v6.7-rc6
v6.7-rc7
v6.7-rc8
v6.8
v6.8-rc1
v6.8-rc2
v6.8-rc3
v6.8-rc4
v6.8-rc5
v6.8-rc6
v6.8-rc7
v6.9
v6.9-rc1
v6.9-rc2
v6.9-rc3
v6.9-rc4
v6.9-rc5
v6.9-rc6
v6.9-rc7

Linux / Kernel

Package

Name
Kernel

Affected ranges

Type
ECOSYSTEM
Events
Introduced
5.18.0
Fixed
6.1.129
Type
ECOSYSTEM
Events
Introduced
6.2.0
Fixed
6.6.76
Type
ECOSYSTEM
Events
Introduced
6.7.0
Fixed
6.12.13
Type
ECOSYSTEM
Events
Introduced
6.13.0
Fixed
6.13.2