Medium 5.5Published Feb 27, 2025

CVE-2025-21787team: better TEAM_OPTION_TYPE_STRING validation

Updated under an hour ago (2026-10-19 07:00 UTC)

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It affects Linux and 2 other products. Add what you run to find out whether that includes you.

No exploitation reported and no EPSS estimate yet.

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Exploited in the last 30 days

In the Linux kernel, the following vulnerability has been resolved: team: better TEAM_OPTION_TYPE_STRING validation syzbot reported following splat [1] Make sure user-provided data contains one nul byte. [1] BUG: KMSAN: uninit-value in string_nocheck lib/vsprintf.c:633 [inline] BUG: KMSAN: uninit-value in string+0x3ec/0x5f0 lib/vsprintf.c:714 string_nocheck lib/vsprintf.c:633 [inline] string+0x3ec/0x5f0 lib/vsprintf.c:714 vsnprintf+0xa5d/0x1960 lib/vsprintf.c:2843 __request_module+0x252/0x9f0 kernel/module/kmod.c:149 team_mode_get drivers/net/team/team_core.c:480 [inline] team_change_mode drivers/net/team/team_core.c:607 [inline] team_mode_option_set+0x437/0x970 drivers/net/team/team_core.c:1401 team_option_set drivers/net/team/team_core.c:375 [inline] team_nl_options_set_doit+0x1339/0x1f90 drivers/net/team/team_core.c:2662 genl_family_rcv_msg_doit net/netlink/genetlink.c:1115 [inline] genl_family_rcv_msg net/netlink/genetlink.c:1195 [inline] genl_rcv_msg+0x1214/0x12c0 net/netlink/genetlink.c:1210 netlink_rcv_skb+0x375/0x650 net/netlink/af_netlink.c:2543 genl_rcv+0x40/0x60 net/netlink/genetlink.c:1219 netlink_unicast_kernel net/netlink/af_netlink.c:1322 [inline] netlink_unicast+0xf52/0x1260 net/netlink/af_netlink.c:1348 netlink_sendmsg+0x10da/0x11e0 net/netlink/af_netlink.c:1892 sock_sendmsg_nosec net/socket.c:718 [inline] __sock_sendmsg+0x30f/0x380 net/socket.c:733 ____sys_sendmsg+0x877/0xb60 net/socket.c:2573 ___sys_sendmsg+0x28d/0x3c0 net/socket.c:2627 __sys_sendmsg net/socket.c:2659 [inline] __do_sys_sendmsg net/socket.c:2664 [inline] __se_sys_sendmsg net/socket.c:2662 [inline] __x64_sys_sendmsg+0x212/0x3c0 net/socket.c:2662 x64_sys_call+0x2ed6/0x3c30 arch/x86/include/generated/asm/syscalls_64.h:47 do_syscall_x64 arch/x86/entry/common.c:52 [inline] do_syscall_64+0xcd/0x1e0 arch/x86/entry/common.c:83 entry_SYSCALL_64_after_hwframe+0x77/0x7f

CVSS: 5.5 MEDIUM (v3.1, NVD)CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Weakness (CWE): Not given
Known exploited: Not in CISA's KEV catalog
EPSS (exploitation in the next 30 days): Not loaded for this CVE
Assigned by: Linux
NVD analysis: Modified
Record last updated: Oct 15, 2026
First seen by InfoSec Signals: Oct 15, 2026

Affected products

Affected products

Linux Linux linux:linux (from the name)	from 3d249d4ca7d0ed6629a135ea1ea21c72286c0d80 before 7c30483d0f6bdb2230e10e3e4be5167927eac7a0; from 3d249d4ca7d0ed6629a135ea1ea21c72286c0d80 before 7f5af50f3aa0af8cbef9fb76fffeed69e8143f59; from 3d249d4ca7d0ed6629a135ea1ea21c72286c0d80 before f443687ad20c70320d1248f35f57bf46cac8df0a; from 3d249d4ca7d0ed6629a135ea1ea21c72286c0d80 before 4512482e4805dd30bc77dec511f2a2edba5cb868; from 3d249d4ca7d0ed6629a135ea1ea21c72286c0d80 before d071a91fa614ecdf760c29f61f6a7bfb7df796d6; from 3d249d4ca7d0ed6629a135ea1ea21c72286c0d80 before 4236bf4716589558cc0f3c3612642b2c2141b04e; from 3d249d4ca7d0ed6629a135ea1ea21c72286c0d80 before 8401cade1918281177974b32c925afdce750d292; from 3d249d4ca7d0ed6629a135ea1ea21c72286c0d80 before 5bef3ac184b5626ea62385d6b82a1992b89d7940	CNA record
Siemens SIMATIC S7-1500 TM MFP - GNU/Linux subsystem siemens:simatic_s7_1500_tm_mfp_gnu_linux_subsystem (from the name)	all versions	CISA ADP
linux linux_kernel linux:linux_kernel	from 3.3 before 6.1.129; from 6.2 before 6.6.79; from 6.7 before 6.12.16; from 6.13 before 6.13.4; 6.14; 6.14	NVD

References

https://git.kernel.org/stable/c/7c30483d0f6bdb2230e10e3e4be5167927eac7a0
https://git.kernel.org/stable/c/7f5af50f3aa0af8cbef9fb76fffeed69e8143f59
https://git.kernel.org/stable/c/f443687ad20c70320d1248f35f57bf46cac8df0a
https://git.kernel.org/stable/c/4512482e4805dd30bc77dec511f2a2edba5cb868mailing-list, patch
https://git.kernel.org/stable/c/d071a91fa614ecdf760c29f61f6a7bfb7df796d6mailing-list, patch
https://git.kernel.org/stable/c/4236bf4716589558cc0f3c3612642b2c2141b04emailing-list, patch
https://git.kernel.org/stable/c/8401cade1918281177974b32c925afdce750d292mailing-list, patch
https://git.kernel.org/stable/c/5bef3ac184b5626ea62385d6b82a1992b89d7940mailing-list, patch
https://lists.debian.org/debian-lts-announce/2025/03/msg00028.html
https://lists.debian.org/debian-lts-announce/2025/05/msg00030.html
https://cert-portal.siemens.com/productcert/html/ssa-265688.html
https://cert-portal.siemens.com/productcert/html/ssa-784472.html

The CVE record on cve.org NVD's entry

The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.