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NVD / CVE Program· CNA Linux

CVE-2025-21787: team: better TEAM_OPTION_TYPE_STRING validation

Noroxi assessment

Priority: Monitor (action score 22/100)

  • The sources we track (CISA KEV, Exploit-DB, Metasploit, Nuclei, GitHub) show no public exploit code or exploitation in the wild.
  • Probability of exploitation in the next 30 days: 0.27% (FIRST EPSS).
  • Someone with local access to the system can trigger it. A low-privileged account is enough. No user action is required. No special conditions are required; it is repeatable.
  • Fixed version: Linux Linux 4236bf4716589558cc0f3c3612642b2c2141b04e, 4512482e4805dd30bc77dec511f2a2edba5cb868, 5bef3ac184b5626ea62385d6b82a1992b89d7940; azl3 kernel 6.6.78.1-3 on Azure Linux 3.0 6.6.79.1-1; azl3 kernel 6.6.79.1-1 on Azure Linux 3.0 6.6.79.1-1.

Low priority for now. Upgrade to Linux Linux 4236bf4716589558cc0f3c3612642b2c2141b04e, 4512482e4805dd30bc77dec511f2a2edba5cb868, 5bef3ac184b5626ea62385d6b82a1992b89d7940; azl3 kernel 6.6.78.1-3 on Azure Linux 3.0 6.6.79.1-1; azl3 kernel 6.6.79.1-1 on Azure Linux 3.0 6.6.79.1-1 or later.

Generated automatically from the record's data: CVSS (NVD and CNA), CISA KEV and SSVC, FIRST EPSS, exploit sources, fixed versions. How we calculate it

Primary sources: NVD · CVE.org · FIRST EPSS

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

MediumCVSS 5.5 · v3.1—No exploit Fix available
Published
Feb 27, 2025
Updated
Oct 15, 2026
EPSS
0.2% · 19th percentile

Report tools

JSON

Action score

22

Monitor

Low priority for now.

CVSS
22 / 40 · 5.5 / 10
CISA KEV
0 / 30 · Not listed
EPSS
0 / 30 · 0.2%

Get told when this record changes

  • Not in KEV: no record of exploitation in the wild
  • No public exploit code on record
  • A fix has been released

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Noroxi analysis

What does it mean in your environment?

The assessment above is generated automatically from the record's data; it doesn't know your environment. Our team verifies on your systems whether this vulnerability is actually exploitable and which mitigation is enough.

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Affected systems

Is your version affected?

Pick the product and type the version you run. It's compared with this record's version ranges in your browser; the version isn't sent anywhere.

VendorProduct
linuxlinux kernel

Affected versions

NVD version ranges (for catalog products). Add the product to your stack with a version and matching uses these.

  • linux linux kernel3.3 and later · before 6.1.129
  • linux linux kernel6.2 and later · before 6.6.79
  • linux linux kernel6.7 and later · before 6.12.16
  • linux linux kernel6.13 and later · before 6.13.4
  • linux linux kernel6.14

Versions reported by the vendor

Affected version ranges reported by the assigning authority (Linux). Independent of NVD's CPE analysis and usually ahead of it.

  • Linux Linux

    • 3.3affected
    • 3d249d4ca7d0ed6629a135ea1ea21c72286c0d80 and later · before 7c30483d0f6bdb2230e10e3e4be5167927eac7a0affected · git
    • 3d249d4ca7d0ed6629a135ea1ea21c72286c0d80 and later · before 7f5af50f3aa0af8cbef9fb76fffeed69e8143f59affected · git
    • 3d249d4ca7d0ed6629a135ea1ea21c72286c0d80 and later · before f443687ad20c70320d1248f35f57bf46cac8df0aaffected · git
    • 3d249d4ca7d0ed6629a135ea1ea21c72286c0d80 and later · before 4512482e4805dd30bc77dec511f2a2edba5cb868affected · git
    • 3d249d4ca7d0ed6629a135ea1ea21c72286c0d80 and later · before d071a91fa614ecdf760c29f61f6a7bfb7df796d6affected · git
    • 3d249d4ca7d0ed6629a135ea1ea21c72286c0d80 and later · before 4236bf4716589558cc0f3c3612642b2c2141b04eaffected · git
    • 3d249d4ca7d0ed6629a135ea1ea21c72286c0d80 and later · before 8401cade1918281177974b32c925afdce750d292affected · git
    • 3d249d4ca7d0ed6629a135ea1ea21c72286c0d80 and later · before 5bef3ac184b5626ea62385d6b82a1992b89d7940affected · git
    • before 3.3not affected · semver

Package-level exposure

OSV and GitHub Advisory data: ecosystem, package and range. SBOM matching uses this table.

EcosystemPackageAffected rangeFix
Debian:12linuxbefore 6.1.129-16.1.129-1
Debian:13linuxbefore 6.12.16-16.12.16-1
openSUSE:Leap 15.6dtb-aarch64before 6.4.0-150600.23.53.16.4.0-150600.23.53.1
openSUSE:Leap 15.6kernel-64kbbefore 6.4.0-150600.23.53.16.4.0-150600.23.53.1
openSUSE:Leap 15.6kernel-azurebefore 6.4.0-150600.8.40.16.4.0-150600.8.40.1
openSUSE:Leap 15.6kernel-debugbefore 6.4.0-150600.23.53.16.4.0-150600.23.53.1
openSUSE:Leap 15.6kernel-defaultbefore 6.4.0-150600.23.53.16.4.0-150600.23.53.1
openSUSE:Leap 15.6kernel-default-basebefore 6.4.0-150600.23.53.1.150600.12.24.16.4.0-150600.23.53.1.150600.12.24.1
openSUSE:Leap 15.6kernel-docsbefore 6.4.0-150600.23.53.16.4.0-150600.23.53.1
openSUSE:Leap 15.6kernel-kvmsmallbefore 6.4.0-150600.23.53.16.4.0-150600.23.53.1
openSUSE:Leap 15.6kernel-obs-buildbefore 6.4.0-150600.23.53.16.4.0-150600.23.53.1
openSUSE:Leap 15.6kernel-obs-qabefore 6.4.0-150600.23.53.16.4.0-150600.23.53.1
openSUSE:Leap 15.6kernel-sourcebefore 6.4.0-150600.23.53.16.4.0-150600.23.53.1
openSUSE:Leap 15.6kernel-source-azurebefore 6.4.0-150600.8.40.16.4.0-150600.8.40.1
openSUSE:Leap 15.6kernel-symsbefore 6.4.0-150600.23.53.16.4.0-150600.23.53.1
openSUSE:Leap 15.6kernel-syms-azurebefore 6.4.0-150600.8.40.16.4.0-150600.8.40.1
openSUSE:Leap 15.6kernel-zfcpdumpbefore 6.4.0-150600.23.53.16.4.0-150600.23.53.1
SUSE:Linux Enterprise Live Patching 15 SP6kernel-livepatch-SLE15-SP6_Update_12before 1-150600.13.3.11-150600.13.3.1
SUSE:Linux Enterprise Module for Basesystem 15 SP6kernel-64kbbefore 6.4.0-150600.23.53.16.4.0-150600.23.53.1
SUSE:Linux Enterprise Module for Basesystem 15 SP6kernel-defaultbefore 6.4.0-150600.23.53.16.4.0-150600.23.53.1
SUSE:Linux Enterprise Module for Basesystem 15 SP6kernel-default-basebefore 6.4.0-150600.23.53.1.150600.12.24.16.4.0-150600.23.53.1.150600.12.24.1
SUSE:Linux Enterprise Module for Basesystem 15 SP6kernel-sourcebefore 6.4.0-150600.23.53.16.4.0-150600.23.53.1
SUSE:Linux Enterprise Module for Basesystem 15 SP6kernel-zfcpdumpbefore 6.4.0-150600.23.53.16.4.0-150600.23.53.1
SUSE:Linux Enterprise Module for Development Tools 15 SP6kernel-docsbefore 6.4.0-150600.23.53.16.4.0-150600.23.53.1

+11

Same product

linux: all records

Other highest-scoring records for the same primary product.

  • CVE-2026-31431crypto: algif_aead - Revert to operating out-of-placeKEV
    90Now
  • CVE-2022-0847A flaw was found in the way the "flags" member of the new pipe buffer structure was lacking proper initialization in copy_page_to_iter_pipe KEV
    89Now
  • CVE-2021-22555Heap Out-Of-Bounds Write in Netfilter IP6T_SO_SET_REPLACEKEV
    85Now

Published before and after this one in the same product

  • ← EarlierCVE-2025-21780Feb 27, 2025 · drm/amdgpu: avoid buffer overflow attach in smu_sys_set_pp_table()
    31Monitor
  • ← EarlierCVE-2025-21785Feb 27, 2025 · arm64: cacheinfo: Avoid out-of-bounds write to cacheinfo array
    31Monitor
  • Later →CVE-2025-21790Feb 27, 2025 · vxlan: check vxlan_vnigroup_init() return value
    22Monitor

Remediation

Which version to upgrade to

Fix versions compiled from the vendor, package registries and Microsoft. Verify the vendor's note before upgrading.

Product / packageFixed versionSource
Linux Linux4236bf4716589558cc0f3c3612642b2c2141b04eVendor (CNA)
Linux Linux4512482e4805dd30bc77dec511f2a2edba5cb868Vendor (CNA)
Linux Linux5bef3ac184b5626ea62385d6b82a1992b89d7940Vendor (CNA)
Linux Linux7c30483d0f6bdb2230e10e3e4be5167927eac7a0Vendor (CNA)
Linux Linux7f5af50f3aa0af8cbef9fb76fffeed69e8143f59Vendor (CNA)
Linux Linux8401cade1918281177974b32c925afdce750d292Vendor (CNA)
Linux Linuxd071a91fa614ecdf760c29f61f6a7bfb7df796d6Vendor (CNA)
Linux Linuxf443687ad20c70320d1248f35f57bf46cac8df0aVendor (CNA)
azl3 kernel 6.6.78.1-3 on Azure Linux 3.06.6.79.1-1 · CBL-Mariner ReleasesMicrosoft (MSRC)
azl3 kernel 6.6.79.1-1 on Azure Linux 3.06.6.79.1-1 · CBL-Mariner ReleasesMicrosoft (MSRC)
cbl2 kernel 5.15.179.1-1 on CBL Mariner 2.05.15.179.1-1 · CBL-Mariner ReleasesMicrosoft (MSRC)
cbl2 kernel 5.15.182.1-1 on CBL Mariner 2.0CBL-Mariner ReleasesMicrosoft (MSRC)
cbl2 kernel 5.15.182.1-1 on CBL-Mariner 2.05.15.179.1-1 · CBL-Mariner ReleasesMicrosoft (MSRC)
debian:linux6.1.129-1 · Debian:12Package registry (OSV)
opensuse:dtb-aarch646.4.0-150600.23.53.1 · openSUSE:Leap 15.6Package registry (OSV)
opensuse:kernel-64kb6.4.0-150600.23.53.1 · openSUSE:Leap 15.6Package registry (OSV)
opensuse:kernel-azure6.4.0-150600.8.40.1 · openSUSE:Leap 15.6Package registry (OSV)
opensuse:kernel-debug6.4.0-150600.23.53.1 · openSUSE:Leap 15.6Package registry (OSV)
opensuse:kernel-default6.4.0-150600.23.53.1 · openSUSE:Leap 15.6Package registry (OSV)
opensuse:kernel-default-base6.4.0-150600.23.53.1.150600.12.24.1 · openSUSE:Leap 15.6Package registry (OSV)
opensuse:kernel-docs6.4.0-150600.23.53.1 · openSUSE:Leap 15.6Package registry (OSV)
opensuse:kernel-kvmsmall6.4.0-150600.23.53.1 · openSUSE:Leap 15.6Package registry (OSV)
opensuse:kernel-obs-build6.4.0-150600.23.53.1 · openSUSE:Leap 15.6Package registry (OSV)
opensuse:kernel-obs-qa6.4.0-150600.23.53.1 · openSUSE:Leap 15.6Package registry (OSV)
opensuse:kernel-source-azure6.4.0-150600.8.40.1 · openSUSE:Leap 15.6Package registry (OSV)
opensuse:kernel-syms-azure6.4.0-150600.8.40.1 · openSUSE:Leap 15.6Package registry (OSV)
suse:kernel-64kb6.4.0-150600.23.53.1 · SUSE:Linux Enterprise Module for Basesystem 15 SP6Package registry (OSV)
suse:kernel-azure6.4.0-150600.8.40.1 · SUSE:Linux Enterprise Module for Public Cloud 15 SP6Package registry (OSV)
suse:kernel-default6.4.0-150600.23.53.1 · SUSE:Linux Enterprise Module for Basesystem 15 SP6Package registry (OSV)
suse:kernel-default-base6.4.0-150600.23.53.1.150600.12.24.1 · SUSE:Linux Enterprise Module for Basesystem 15 SP6Package registry (OSV)

+8

Exploit status

No known public exploit

No public exploit has been observed yet. That doesn't mean you're safe, only that the bar is a little higher.

Research context

For pentesters and researchers: attack profile, score disagreement, timeline, patch commits, credits, variant and chain candidates, bug bounty scope. All derived from existing data; no exploit code.

Timeline

From publication to today: proof of concept, Metasploit module, CISA KEV and fix record. Dates are as reported by the sources.

No dated events beyond publication.

No history yet (it accumulates with the daily EPSS job).

Patch and commit links

Commit, PR and diff links among the references. A starting point for patch-diffing and variant hunting; fixes, not exploits.

No commit or PR link among the references.

Credits

All researchers

Finders, reporters and analysts named in the CNA record. Click a name for that researcher’s other records.

No credits in the CNA record.

Variant candidates

Same product, same weakness class, within 18 months. If the patch missed the root cause, the sibling bug is here.

  • CVE-2024-50302100 days apartHID: core: zero-initialize the report bufferKEV
    52Plan
  • CVE-2026-52989482 days apartnvmet-tcp: propagate nvmet_tcp_build_pdu_iovec() errors to its callers
    39Monitor
  • CVE-2024-47685129 days apartnetfilter: nf_reject_ipv6: fix nf_reject_ip6_tcphdr_put()
    36Monitor
  • CVE-2026-53225483 days apartsctp: fix uninit-value in __sctp_rcv_asconf_lookup()
    36Monitor
  • CVE-2026-53170483 days apartaccel/ethosu: reject DMA commands with uninitialized length
    35Monitor
  • CVE-2026-43139433 days apartxfrm6: fix uninitialized saddr in xfrm6_get_saddr()
    34Monitor

Chain candidates

An authentication bypass and a privilege-requiring bug in the same product, published close together: combined they may become an unauthenticated path.

—

Bug bounty scope

No known public program.

Source: bounty-targets-data (public HackerOne, Bugcrowd, Intigriti, YesWeHack listings).

Technical details

Attack conditions

  • Someone with local access to the system can trigger it.
  • A low-privileged account is enough.
  • No user action is required.
  • No special conditions are required; it is repeatable.

If successful

Confidentiality
none
Integrity
none
Availability
high · the service can be disrupted
Attack vector
Local
Attack complexity
Low
Privileges required
Low
User interaction
None
Scope
Unchanged
Confidentiality impact
None
Integrity impact
None
Availability impact
High

Weakness class (CWE)

CWE-908 · Use of Uninitialized Resource

CVSS vector

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

nvd-primary

Attack context

MITRE CAPEC attack patterns and ATT&CK techniques for this weakness class (CWE). A starting point for detection rules and threat hunting.

MITRE has no CAPEC/ATT&CK mapping for this CWE.

Change log

  1. Fix✗ → ✓

For records you follow, these changes also arrive as notifications. →

References

Show all references (11 more)

Vendor advisories and official records. Exploit/PoC links are deliberately left out.

All records