CVE-2025-39812

MEDIUM EPSS 5.6%
Published Sep 16, 20259mo ago · Modified Jun 17, 20261w ago
5.5 CVSS 3.1
Medium
Find Similar
Published Sep 16, 2025 9mo ago
Last Modified Jun 17, 2026 1w ago

Description

In the Linux kernel, the following vulnerability has been resolved: sctp: initialize more fields in sctp_v6_from_sk() syzbot found that sin6_scope_id was not properly initialized, leading to undefined behavior. Clear sin6_scope_id and sin6_flowinfo. BUG: KMSAN: uninit-value in __sctp_v6_cmp_addr+0x887/0x8c0 net/sctp/ipv6.c:649 __sctp_v6_cmp_addr+0x887/0x8c0 net/sctp/ipv6.c:649 sctp_inet6_cmp_addr+0x4f2/0x510 net/sctp/ipv6.c:983 sctp_bind_addr_conflict+0x22a/0x3b0 net/sctp/bind_addr.c:390 sctp_get_port_local+0x21eb/0x2440 net/sctp/socket.c:8452 sctp_get_port net/sctp/socket.c:8523 [inline] sctp_listen_start net/sctp/socket.c:8567 [inline] sctp_inet_listen+0x710/0xfd0 net/sctp/socket.c:8636 __sys_listen_socket net/socket.c:1912 [inline] __sys_listen net/socket.c:1927 [inline] __do_sys_listen net/socket.c:1932 [inline] __se_sys_listen net/socket.c:1930 [inline] __x64_sys_listen+0x343/0x4c0 net/socket.c:1930 x64_sys_call+0x271d/0x3e20 arch/x86/include/generated/asm/syscalls_64.h:51 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0xd9/0x210 arch/x86/entry/syscall_64.c:94 entry_SYSCALL_64_after_hwframe+0x77/0x7f Local variable addr.i.i created at: sctp_get_port net/sctp/socket.c:8515 [inline] sctp_listen_start net/sctp/socket.c:8567 [inline] sctp_inet_listen+0x650/0xfd0 net/sctp/socket.c:8636 __sys_listen_socket net/socket.c:1912 [inline] __sys_listen net/socket.c:1927 [inline] __do_sys_listen net/socket.c:1932 [inline] __se_sys_listen net/socket.c:1930 [inline] __x64_sys_listen+0x343/0x4c0 net/socket.c:1930

CVSS Details

Base Score
5.5
Exploitability
1.8
Impact
3.6
Vector string
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Attack Vector Local
Attack Complexity Low
Privileges Required Low
User Interaction None
Scope Unchanged
Confidentiality None
Integrity None
Availability High

Threat Intelligence

EPSS Exploit Probability
5.6% percentile
Exploit & Patch Status
No Known Exploit
Patch Available

Weaknesses 1

CWE-908

Affected Products 16

VendorProductVersionRange
linuxlinux_kernel*≥2.6.12.1  –  <5.4.298
linuxlinux_kernel*≥5.5  –  <5.10.242
linuxlinux_kernel*≥5.11  –  <5.15.191
linuxlinux_kernel*≥5.16  –  <6.1.150
linuxlinux_kernel*≥6.2  –  <6.6.104
linuxlinux_kernel*≥6.7  –  <6.12.45
linuxlinux_kernel*≥6.13  –  <6.16.5
linuxlinux_kernel2.6.12any
linuxlinux_kernel2.6.12any
linuxlinux_kernel2.6.12any
linuxlinux_kernel2.6.12any
linuxlinux_kernel2.6.12any
linuxlinux_kernel6.17any
linuxlinux_kernel6.17any
linuxlinux_kernel6.17any
debiandebian_linux11.0any

References 11

  • cert-portal.siemens.com https://cert-portal.siemens.com/productcert/html/ssa-032379.html
  • git.kernel.org https://git.kernel.org/stable/c/17d6c7747045e9b802c2f5dfaba260d309d831ae
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/1bbc0c02aea1f1c405bd1271466889c25a1fe01b
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/2e8750469242cad8f01f320131fd5a6f540dbb99
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/45e4b36593edffb7bbee5828ae820bc10a9fa0f3
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/463aa96fca6209bb205f49f7deea3817d7ddaa3a
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/65b4693d8bab5370cfcb44a275b4d8dcb06e56bf
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/9546934c2054bba1bd605c44e936619159a34027
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/f6c2cc99fc2387ba6499facd6108f6543382792d
    Patch
  • lists.debian.org https://lists.debian.org/debian-lts-announce/2025/10/msg00007.html
    Third Party Advisory
  • lists.debian.org https://lists.debian.org/debian-lts-announce/2025/10/msg00008.html
    Third Party Advisory

Remediation

  • git.kernel.org https://git.kernel.org/stable/c/17d6c7747045e9b802c2f5dfaba260d309d831ae
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/1bbc0c02aea1f1c405bd1271466889c25a1fe01b
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/2e8750469242cad8f01f320131fd5a6f540dbb99
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/45e4b36593edffb7bbee5828ae820bc10a9fa0f3
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/463aa96fca6209bb205f49f7deea3817d7ddaa3a
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/65b4693d8bab5370cfcb44a275b4d8dcb06e56bf
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/9546934c2054bba1bd605c44e936619159a34027
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/f6c2cc99fc2387ba6499facd6108f6543382792d
    Patch