CVE-2025-22062 (GCVE-0-2025-22062)
Vulnerability from cvelistv5
Published
2025-04-16 14:12
Modified
2026-10-15 21:51
Severity ?
7.8 (High) - CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Summary
In the Linux kernel, the following vulnerability has been resolved: sctp: add mutual exclusion in proc_sctp_do_udp_port() We must serialize calls to sctp_udp_sock_stop() and sctp_udp_sock_start() or risk a crash as syzbot reported: Oops: general protection fault, probably for non-canonical address 0xdffffc000000000d: 0000 [#1] SMP KASAN PTI KASAN: null-ptr-deref in range [0x0000000000000068-0x000000000000006f] CPU: 1 UID: 0 PID: 6551 Comm: syz.1.44 Not tainted 6.14.0-syzkaller-g7f2ff7b62617 #0 PREEMPT(full) Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/12/2025 RIP: 0010:kernel_sock_shutdown+0x47/0x70 net/socket.c:3653 Call Trace: <TASK> udp_tunnel_sock_release+0x68/0x80 net/ipv4/udp_tunnel_core.c:181 sctp_udp_sock_stop+0x71/0x160 net/sctp/protocol.c:930 proc_sctp_do_udp_port+0x264/0x450 net/sctp/sysctl.c:553 proc_sys_call_handler+0x3d0/0x5b0 fs/proc/proc_sysctl.c:601 iter_file_splice_write+0x91c/0x1150 fs/splice.c:738 do_splice_from fs/splice.c:935 [inline] direct_splice_actor+0x18f/0x6c0 fs/splice.c:1158 splice_direct_to_actor+0x342/0xa30 fs/splice.c:1102 do_splice_direct_actor fs/splice.c:1201 [inline] do_splice_direct+0x174/0x240 fs/splice.c:1227 do_sendfile+0xafd/0xe50 fs/read_write.c:1368 __do_sys_sendfile64 fs/read_write.c:1429 [inline] __se_sys_sendfile64 fs/read_write.c:1415 [inline] __x64_sys_sendfile64+0x1d8/0x220 fs/read_write.c:1415 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
References
Impacted products
Vendor Product Version
Linux Linux Version: 046c052b475e7119b6a30e3483e2888fc606a2f8
Version: 046c052b475e7119b6a30e3483e2888fc606a2f8
Version: 046c052b475e7119b6a30e3483e2888fc606a2f8
Version: 046c052b475e7119b6a30e3483e2888fc606a2f8
Version: 046c052b475e7119b6a30e3483e2888fc606a2f8
Version: 046c052b475e7119b6a30e3483e2888fc606a2f8
Version: 046c052b475e7119b6a30e3483e2888fc606a2f8
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          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nsctp: add mutual exclusion in proc_sctp_do_udp_port()\n\nWe must serialize calls to sctp_udp_sock_stop() and sctp_udp_sock_start()\nor risk a crash as syzbot reported:\n\nOops: general protection fault, probably for non-canonical address 0xdffffc000000000d: 0000 [#1] SMP KASAN PTI\nKASAN: null-ptr-deref in range [0x0000000000000068-0x000000000000006f]\nCPU: 1 UID: 0 PID: 6551 Comm: syz.1.44 Not tainted 6.14.0-syzkaller-g7f2ff7b62617 #0 PREEMPT(full)\nHardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/12/2025\n RIP: 0010:kernel_sock_shutdown+0x47/0x70 net/socket.c:3653\nCall Trace:\n \u003cTASK\u003e\n  udp_tunnel_sock_release+0x68/0x80 net/ipv4/udp_tunnel_core.c:181\n  sctp_udp_sock_stop+0x71/0x160 net/sctp/protocol.c:930\n  proc_sctp_do_udp_port+0x264/0x450 net/sctp/sysctl.c:553\n  proc_sys_call_handler+0x3d0/0x5b0 fs/proc/proc_sysctl.c:601\n  iter_file_splice_write+0x91c/0x1150 fs/splice.c:738\n  do_splice_from fs/splice.c:935 [inline]\n  direct_splice_actor+0x18f/0x6c0 fs/splice.c:1158\n  splice_direct_to_actor+0x342/0xa30 fs/splice.c:1102\n  do_splice_direct_actor fs/splice.c:1201 [inline]\n  do_splice_direct+0x174/0x240 fs/splice.c:1227\n  do_sendfile+0xafd/0xe50 fs/read_write.c:1368\n  __do_sys_sendfile64 fs/read_write.c:1429 [inline]\n  __se_sys_sendfile64 fs/read_write.c:1415 [inline]\n  __x64_sys_sendfile64+0x1d8/0x220 fs/read_write.c:1415\n  do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]"
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              "value": "AV:L - The only entry point is a write() (or sendfile()/splice()) to the procfs file /proc/sys/net/sctp/udp_port, handled by proc_sctp_do_udp_port(); no remote peer or network packet can reach this code path.\nAC:L - The attacker creates and controls both sides of the race by issuing two concurrent writes to the same sysctl, and the window spans udp_tunnel_sock_release()\u0027s synchronize_rcu() \u2014 a millisecond-scale gap between reading net-\u003esctp.udp4_sock and clearing it \u2014 making the double release trivially winnable.\nPR:L - The sysctl is per-netns and net_ctl_permissions() grants write access to CAP_NET_ADMIN in the netns\u0027s user_ns, which any unprivileged user obtains with `unshare -Urn`; the file is also owned by the ns root uid via net_ctl_set_ownership().\nUI:N - Exploitation is entirely self-contained in the attacker\u0027s own threads writing to a procfs file; no victim action or cooperation is required.\nS:U - The double free and subsequent memory corruption occur in kernel heap objects within the same security authority; no VM, IOMMU, or sandbox boundary is crossed.\nC:H - The unserialized sctp_udp_sock_stop() releases the same struct socket twice, producing a use-after-free/double-iput on the socket_alloc slab plus a sock_put() refcount underflow, letting the attacker reallocate the freed object and read back kernel memory contents.\nI:H - The second thread executes kernel_sock_shutdown(), which performs an indirect call via READ_ONCE(sock-\u003eops)-\u003eshutdown on the already-freed struct socket, giving a heap-spray-controlled function pointer and thus a control-flow hijack / arbitrary write primitive.\nA:H - The race reliably produces a kernel oops \u2014 syzbot reported a general protection fault (null-ptr-deref) in kernel_sock_shutdown() from sctp_udp_sock_stop() \u2014 and the double free/refcount underflow crashes or panics the kernel."
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    "cveId": "CVE-2025-22062",
    "datePublished": "2025-04-16T14:12:17.605Z",
    "dateReserved": "2024-12-29T08:45:45.813Z",
    "dateUpdated": "2026-10-15T21:51:57.395Z",
    "state": "PUBLISHED"
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writing to a procfs file; no victim action or cooperation is required.\\nS:U - The double free and subsequent memory corruption occur in kernel heap objects within the same security authority; no VM, IOMMU, or sandbox boundary is crossed.\\nC:H - The unserialized sctp_udp_sock_stop() releases the same struct socket twice, producing a use-after-free/double-iput on the socket_alloc slab plus a sock_put() refcount underflow, letting the attacker reallocate the freed object and read back kernel memory contents.\\nI:H - The second thread executes kernel_sock_shutdown(), which performs an indirect call via READ_ONCE(sock-\u003eops)-\u003eshutdown on the already-freed struct socket, giving a heap-spray-controlled function pointer and thus a control-flow hijack / arbitrary write primitive.\\nA:H - The race reliably produces a kernel oops \\u2014 syzbot reported a general protection fault (null-ptr-deref) in kernel_sock_shutdown() from sctp_udp_sock_stop() \\u2014 and the double free/refcount 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\"lessThanOrEqual\": \"6.1.*\"}, {\"status\": \"unaffected\", \"version\": \"6.6.92\", \"versionType\": \"semver\", \"lessThanOrEqual\": \"6.6.*\"}, {\"status\": \"unaffected\", \"version\": \"6.12.23\", \"versionType\": \"semver\", \"lessThanOrEqual\": \"6.12.*\"}, {\"status\": \"unaffected\", \"version\": \"6.13.11\", \"versionType\": \"semver\", \"lessThanOrEqual\": \"6.13.*\"}, {\"status\": \"unaffected\", \"version\": \"6.14.2\", \"versionType\": \"semver\", \"lessThanOrEqual\": \"6.14.*\"}, {\"status\": \"unaffected\", \"version\": \"6.15\", \"versionType\": \"original_commit_for_fix\", \"lessThanOrEqual\": \"*\"}], \"programFiles\": [\"net/sctp/sysctl.c\"], \"defaultStatus\": \"affected\"}], \"references\": [{\"url\": \"https://git.kernel.org/stable/c/65ccb2793da7401772a3ffe85355c831b313c59f\"}, {\"url\": \"https://git.kernel.org/stable/c/386507cb6fb7cdef598ddcb3f0fa37e6ca9e789d\"}, {\"url\": \"https://git.kernel.org/stable/c/b3598f53211ba1025485306de2733bdd241311a3\"}, {\"url\": \"https://git.kernel.org/stable/c/e5178bfc55b3a78000f0f8298e7ade88783ce581\"}, {\"url\": \"https://git.kernel.org/stable/c/efb8cb487be8f4ba6aaef616011d702d6a083ed1\"}, {\"url\": \"https://git.kernel.org/stable/c/d3d7675d77622f6ca1aae14c51f80027b36283f8\"}, {\"url\": \"https://git.kernel.org/stable/c/10206302af856791fbcc27a33ed3c3eb09b2793d\"}], \"x_generator\": {\"engine\": \"bippy-1.2.0\"}, \"descriptions\": [{\"lang\": \"en\", \"value\": \"In the Linux kernel, the following vulnerability has been resolved:\\n\\nsctp: add mutual exclusion in proc_sctp_do_udp_port()\\n\\nWe must serialize calls to sctp_udp_sock_stop() and sctp_udp_sock_start()\\nor risk a crash as syzbot reported:\\n\\nOops: general protection fault, probably for non-canonical address 0xdffffc000000000d: 0000 [#1] SMP KASAN PTI\\nKASAN: null-ptr-deref in range [0x0000000000000068-0x000000000000006f]\\nCPU: 1 UID: 0 PID: 6551 Comm: syz.1.44 Not tainted 6.14.0-syzkaller-g7f2ff7b62617 #0 PREEMPT(full)\\nHardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/12/2025\\n RIP: 0010:kernel_sock_shutdown+0x47/0x70 net/socket.c:3653\\nCall Trace:\\n \u003cTASK\u003e\\n  udp_tunnel_sock_release+0x68/0x80 net/ipv4/udp_tunnel_core.c:181\\n  sctp_udp_sock_stop+0x71/0x160 net/sctp/protocol.c:930\\n  proc_sctp_do_udp_port+0x264/0x450 net/sctp/sysctl.c:553\\n  proc_sys_call_handler+0x3d0/0x5b0 fs/proc/proc_sysctl.c:601\\n  iter_file_splice_write+0x91c/0x1150 fs/splice.c:738\\n  do_splice_from fs/splice.c:935 [inline]\\n  direct_splice_actor+0x18f/0x6c0 fs/splice.c:1158\\n  splice_direct_to_actor+0x342/0xa30 fs/splice.c:1102\\n  do_splice_direct_actor fs/splice.c:1201 [inline]\\n  do_splice_direct+0x174/0x240 fs/splice.c:1227\\n  do_sendfile+0xafd/0xe50 fs/read_write.c:1368\\n  __do_sys_sendfile64 fs/read_write.c:1429 [inline]\\n  __se_sys_sendfile64 fs/read_write.c:1415 [inline]\\n  __x64_sys_sendfile64+0x1d8/0x220 fs/read_write.c:1415\\n  do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]\"}], \"cpeApplicability\": [{\"nodes\": [{\"negate\": false, \"cpeMatch\": [{\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"5.15.184\", \"versionStartIncluding\": \"5.11\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"6.1.140\", \"versionStartIncluding\": \"5.11\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"6.6.92\", \"versionStartIncluding\": \"5.11\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"6.12.23\", \"versionStartIncluding\": \"5.11\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"6.13.11\", \"versionStartIncluding\": \"5.11\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"6.14.2\", \"versionStartIncluding\": \"5.11\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"6.15\", \"versionStartIncluding\": \"5.11\"}], \"operator\": \"OR\"}]}], \"providerMetadata\": {\"orgId\": \"416baaa9-dc9f-4396-8d5f-8c081fb06d67\", \"shortName\": \"Linux\", \"dateUpdated\": \"2026-08-05T11:56:28.212Z\"}}}",
      "cveMetadata": "{\"cveId\": \"CVE-2025-22062\", \"state\": \"PUBLISHED\", \"dateUpdated\": \"2026-10-15T21:51:57.395Z\", \"dateReserved\": \"2024-12-29T08:45:45.813Z\", \"assignerOrgId\": \"416baaa9-dc9f-4396-8d5f-8c081fb06d67\", \"datePublished\": \"2025-04-16T14:12:17.605Z\", \"assignerShortName\": \"Linux\"}",
      "dataType": "CVE_RECORD",
      "dataVersion": "5.2"
    }
  }
}


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