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CVE-2025-21787 (GCVE-0-2025-21787)

Vulnerability from cvelistv5 – Published: 2025-02-27 02:18 – Updated: 2026-05-12 12:03
VLAI
Title
team: better TEAM_OPTION_TYPE_STRING validation
Summary
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
Severity
5.5 (Medium)
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Assigner
References
Impacted products
Vendor Product Version CPE status
Linux Linux Affected: 3d249d4ca7d0ed6629a135ea1ea21c72286c0d80 , < 7c30483d0f6bdb2230e10e3e4be5167927eac7a0 (git)
Affected: 3d249d4ca7d0ed6629a135ea1ea21c72286c0d80 , < 7f5af50f3aa0af8cbef9fb76fffeed69e8143f59 (git)
Affected: 3d249d4ca7d0ed6629a135ea1ea21c72286c0d80 , < f443687ad20c70320d1248f35f57bf46cac8df0a (git)
Affected: 3d249d4ca7d0ed6629a135ea1ea21c72286c0d80 , < 4512482e4805dd30bc77dec511f2a2edba5cb868 (git)
Affected: 3d249d4ca7d0ed6629a135ea1ea21c72286c0d80 , < d071a91fa614ecdf760c29f61f6a7bfb7df796d6 (git)
Affected: 3d249d4ca7d0ed6629a135ea1ea21c72286c0d80 , < 4236bf4716589558cc0f3c3612642b2c2141b04e (git)
Affected: 3d249d4ca7d0ed6629a135ea1ea21c72286c0d80 , < 8401cade1918281177974b32c925afdce750d292 (git)
Affected: 3d249d4ca7d0ed6629a135ea1ea21c72286c0d80 , < 5bef3ac184b5626ea62385d6b82a1992b89d7940 (git)
guessed Create a notification for this product.
Linux Linux Affected: 3.3
Unaffected: 0 , < 3.3 (semver)
Unaffected: 5.4.291 , ≤ 5.4.* (semver)
Unaffected: 5.10.235 , ≤ 5.10.* (semver)
Unaffected: 5.15.179 , ≤ 5.15.* (semver)
Unaffected: 6.1.129 , ≤ 6.1.* (semver)
Unaffected: 6.6.79 , ≤ 6.6.* (semver)
Unaffected: 6.12.16 , ≤ 6.12.* (semver)
Unaffected: 6.13.4 , ≤ 6.13.* (semver)
Unaffected: 6.14 , ≤ * (original_commit_for_fix)
guessed Create a notification for this product.
Siemens SIMATIC S7-1500 TM MFP - GNU/Linux subsystem Affected: 0 , < * (custom)
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    },
    "nvd": "{\"cve\":{\"id\":\"CVE-2025-21787\",\"sourceIdentifier\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"published\":\"2025-02-27T03:15:19.553\",\"lastModified\":\"2026-06-17T08:44:16.603\",\"vulnStatus\":\"Modified\",\"cveTags\":[],\"descriptions\":[{\"lang\":\"en\",\"value\":\"In the Linux kernel, the following vulnerability has been resolved:\\n\\nteam: better TEAM_OPTION_TYPE_STRING validation\\n\\nsyzbot reported following splat [1]\\n\\nMake sure user-provided data contains one nul byte.\\n\\n[1]\\n BUG: KMSAN: uninit-value in string_nocheck lib/vsprintf.c:633 [inline]\\n BUG: KMSAN: uninit-value in string+0x3ec/0x5f0 lib/vsprintf.c:714\\n  string_nocheck lib/vsprintf.c:633 [inline]\\n  string+0x3ec/0x5f0 lib/vsprintf.c:714\\n  vsnprintf+0xa5d/0x1960 lib/vsprintf.c:2843\\n  __request_module+0x252/0x9f0 kernel/module/kmod.c:149\\n  team_mode_get drivers/net/team/team_core.c:480 [inline]\\n  team_change_mode drivers/net/team/team_core.c:607 [inline]\\n  team_mode_option_set+0x437/0x970 drivers/net/team/team_core.c:1401\\n  team_option_set drivers/net/team/team_core.c:375 [inline]\\n  team_nl_options_set_doit+0x1339/0x1f90 drivers/net/team/team_core.c:2662\\n  genl_family_rcv_msg_doit net/netlink/genetlink.c:1115 [inline]\\n  genl_family_rcv_msg net/netlink/genetlink.c:1195 [inline]\\n  genl_rcv_msg+0x1214/0x12c0 net/netlink/genetlink.c:1210\\n  netlink_rcv_skb+0x375/0x650 net/netlink/af_netlink.c:2543\\n  genl_rcv+0x40/0x60 net/netlink/genetlink.c:1219\\n  netlink_unicast_kernel net/netlink/af_netlink.c:1322 [inline]\\n  netlink_unicast+0xf52/0x1260 net/netlink/af_netlink.c:1348\\n  netlink_sendmsg+0x10da/0x11e0 net/netlink/af_netlink.c:1892\\n  sock_sendmsg_nosec net/socket.c:718 [inline]\\n  __sock_sendmsg+0x30f/0x380 net/socket.c:733\\n  ____sys_sendmsg+0x877/0xb60 net/socket.c:2573\\n  ___sys_sendmsg+0x28d/0x3c0 net/socket.c:2627\\n  __sys_sendmsg net/socket.c:2659 [inline]\\n  __do_sys_sendmsg net/socket.c:2664 [inline]\\n  __se_sys_sendmsg net/socket.c:2662 [inline]\\n  __x64_sys_sendmsg+0x212/0x3c0 net/socket.c:2662\\n  x64_sys_call+0x2ed6/0x3c30 arch/x86/include/generated/asm/syscalls_64.h:47\\n  do_syscall_x64 arch/x86/entry/common.c:52 [inline]\\n  do_syscall_64+0xcd/0x1e0 arch/x86/entry/common.c:83\\n entry_SYSCALL_64_after_hwframe+0x77/0x7f\"},{\"lang\":\"es\",\"value\":\"En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: equipo: mejor validaci\u00f3n de TEAM_OPTION_TYPE_STRING syzbot inform\u00f3 lo siguiente: [1] Aseg\u00farese de que los datos proporcionados por el usuario contengan un byte nulo. [1] ERROR: KMSAN: valor no inicializado en string_nocheck lib/vsprintf.c:633 [en l\u00ednea] ERROR: KMSAN: valor no inicializado en 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\"}],\"affected\":[{\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"affectedData\":[{\"vendor\":\"Linux\",\"product\":\"Linux\",\"defaultStatus\":\"unaffected\",\"programFiles\":[\"drivers/net/team/team_core.c\"],\"repo\":\"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\",\"versions\":[{\"version\":\"3d249d4ca7d0ed6629a135ea1ea21c72286c0d80\",\"lessThan\":\"7c30483d0f6bdb2230e10e3e4be5167927eac7a0\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"3d249d4ca7d0ed6629a135ea1ea21c72286c0d80\",\"lessThan\":\"7f5af50f3aa0af8cbef9fb76fffeed69e8143f59\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"3d249d4ca7d0ed6629a135ea1ea21c72286c0d80\",\"lessThan\":\"f443687ad20c70320d1248f35f57bf46cac8df0a\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"3d249d4ca7d0ed6629a135ea1ea21c72286c0d80\",\"lessThan\":\"4512482e4805dd30bc77dec511f2a2edba5cb868\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"3d249d4ca7d0ed6629a135ea1ea21c72286c0d80\",\"lessThan\":\"d071a91fa614ecdf760c29f61f6a7bfb7df796d6\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"3d249d4ca7d0ed6629a135ea1ea21c72286c0d80\",\"lessThan\":\"4236bf4716589558cc0f3c3612642b2c2141b04e\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"3d249d4ca7d0ed6629a135ea1ea21c72286c0d80\",\"lessThan\":\"8401cade1918281177974b32c925afdce750d292\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"3d249d4ca7d0ed6629a135ea1ea21c72286c0d80\",\"lessThan\":\"5bef3ac184b5626ea62385d6b82a1992b89d7940\",\"versionType\":\"git\",\"status\":\"affected\"}]},{\"vendor\":\"Linux\",\"product\":\"Linux\",\"defaultStatus\":\"affected\",\"programFiles\":[\"drivers/net/team/team_core.c\"],\"repo\":\"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\",\"versions\":[{\"version\":\"3.3\",\"status\":\"affected\"},{\"version\":\"0\",\"lessThan\":\"3.3\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"5.4.291\",\"lessThanOrEqual\":\"5.4.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"5.10.235\",\"lessThanOrEqual\":\"5.10.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"5.15.179\",\"lessThanOrEqual\":\"5.15.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"6.1.129\",\"lessThanOrEqual\":\"6.1.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"6.6.79\",\"lessThanOrEqual\":\"6.6.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"6.12.16\",\"lessThanOrEqual\":\"6.12.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"6.13.4\",\"lessThanOrEqual\":\"6.13.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"6.14\",\"lessThanOrEqual\":\"*\",\"versionType\":\"original_commit_for_fix\",\"status\":\"unaffected\"}]}]},{\"source\":\"0b142b55-0307-4c5a-b3c9-f314f3fb7c5e\",\"affectedData\":[{\"vendor\":\"Siemens\",\"product\":\"SIMATIC S7-1500 TM MFP - GNU/Linux subsystem\",\"defaultStatus\":\"unknown\",\"versions\":[{\"version\":\"0\",\"lessThan\":\"*\",\"versionType\":\"custom\",\"status\":\"affected\"}]}]}],\"metrics\":{\"cvssMetricV31\":[{\"source\":\"nvd@nist.gov\",\"type\":\"Primary\",\"cvssData\":{\"version\":\"3.1\",\"vectorString\":\"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H\",\"baseScore\":5.5,\"baseSeverity\":\"MEDIUM\",\"attackVector\":\"LOCAL\",\"attackComplexity\":\"LOW\",\"privilegesRequired\":\"LOW\",\"userInteraction\":\"NONE\",\"scope\":\"UNCHANGED\",\"confidentialityImpact\":\"NONE\",\"integrityImpact\":\"NONE\",\"availabilityImpact\":\"HIGH\"},\"exploitabilityScore\":1.8,\"impactScore\":3.6}]},\"weaknesses\":[{\"source\":\"nvd@nist.gov\",\"type\":\"Primary\",\"description\":[{\"lang\":\"en\",\"value\":\"CWE-908\"}]}],\"configurations\":[{\"nodes\":[{\"operator\":\"OR\",\"negate\":false,\"cpeMatch\":[{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"3.3\",\"versionEndExcluding\":\"6.1.129\",\"matchCriteriaId\":\"E9C14B40-B889-4BBF-A766-22C54E3B7BFF\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"6.2\",\"versionEndExcluding\":\"6.6.79\",\"matchCriteriaId\":\"B16AADE5-B2FD-4C14-B4E4-85E8EDAFE775\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"6.7\",\"versionEndExcluding\":\"6.12.16\",\"matchCriteriaId\":\"13C8DB18-FC60-425F-84E5-3EDDEC61B2FC\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"6.13\",\"versionEndExcluding\":\"6.13.4\",\"matchCriteriaId\":\"2A2093ED-74A9-43F9-AC72-50030F374EA4\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:6.14:rc1:*:*:*:*:*:*\",\"matchCriteriaId\":\"186716B6-2B66-4BD0-852E-D48E71C0C85F\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:6.14:rc2:*:*:*:*:*:*\",\"matchCriteriaId\":\"0D3E781C-403A-498F-9DA9-ECEE50F41E75\"}]}]}],\"references\":[{\"url\":\"https://git.kernel.org/stable/c/4236bf4716589558cc0f3c3612642b2c2141b04e\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"tags\":[\"Mailing List\",\"Patch\"]},{\"url\":\"https://git.kernel.org/stable/c/4512482e4805dd30bc77dec511f2a2edba5cb868\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"tags\":[\"Mailing List\",\"Patch\"]},{\"url\":\"https://git.kernel.org/stable/c/5bef3ac184b5626ea62385d6b82a1992b89d7940\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"tags\":[\"Mailing List\",\"Patch\"]},{\"url\":\"https://git.kernel.org/stable/c/7c30483d0f6bdb2230e10e3e4be5167927eac7a0\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/7f5af50f3aa0af8cbef9fb76fffeed69e8143f59\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/8401cade1918281177974b32c925afdce750d292\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"tags\":[\"Mailing List\",\"Patch\"]},{\"url\":\"https://git.kernel.org/stable/c/d071a91fa614ecdf760c29f61f6a7bfb7df796d6\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"tags\":[\"Mailing List\",\"Patch\"]},{\"url\":\"https://git.kernel.org/stable/c/f443687ad20c70320d1248f35f57bf46cac8df0a\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://lists.debian.org/debian-lts-announce/2025/03/msg00028.html\",\"source\":\"af854a3a-2127-422b-91ae-364da2661108\"},{\"url\":\"https://lists.debian.org/debian-lts-announce/2025/05/msg00030.html\",\"source\":\"af854a3a-2127-422b-91ae-364da2661108\"},{\"url\":\"https://cert-portal.siemens.com/productcert/html/ssa-265688.html\",\"source\":\"0b142b55-0307-4c5a-b3c9-f314f3fb7c5e\"}]}}",
    "redhat_vex": {
      "aggregate_severity": "Moderate",
      "current_release_date": "2026-07-23T23:46:14+00:00",
      "cve": "CVE-2025-21787",
      "id": "CVE-2025-21787",
      "initial_release_date": "2025-02-27T00:00:00+00:00",
      "product_status:fixed": "303",
      "product_status:known_affected": "22",
      "product_status:known_not_affected": "166",
      "source": "Red Hat CSAF VEX",
      "status": "final",
      "title": "kernel: team: better TEAM_OPTION_TYPE_STRING validation",
      "url": "https://security.access.redhat.com/data/csaf/v2/vex/2025/cve-2025-21787.json",
      "version": "3"
    },
    "suse_vex": {
      "aggregate_severity": "moderate",
      "current_release_date": "2026-09-03T00:16:57Z",
      "cve": "CVE-2025-21787",
      "id": "CVE-2025-21787",
      "initial_release_date": "2025-02-28T02:20:45Z",
      "product_status:known_affected": "788",
      "product_status:known_not_affected": "6",
      "product_status:recommended": "478",
      "source": "SUSE CSAF VEX",
      "status": "interim",
      "title": "SUSE CVE CVE-2025-21787",
      "url": "https://ftp.suse.com/pub/projects/security/csaf-vex/cve-2025-21787.json",
      "version": "54"
    }
  }
}



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Taxonomy of the tags.





Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.

Sightings

Author Source Type Date Other

Nomenclature

  • Seen: The vulnerability was mentioned, discussed, or observed by the user.
  • Confirmed: The vulnerability has been validated from an analyst's perspective.
  • Published Proof of Concept: A public proof of concept is available for this vulnerability.
  • Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
  • Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
  • Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
  • Not confirmed: The user expressed doubt about the validity of the vulnerability.
  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.


Detection rules are retrieved from Rulezet.


Related by attack behaviour

Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.