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CVE-2025-40357 (GCVE-0-2025-40357)

Vulnerability from cvelistv5 – Published: 2025-12-16 13:30 – Updated: 2026-05-11 21:47
VLAI
Title
net/smc: fix general protection fault in __smc_diag_dump
Summary
In the Linux kernel, the following vulnerability has been resolved: net/smc: fix general protection fault in __smc_diag_dump The syzbot report a crash: Oops: general protection fault, probably for non-canonical address 0xfbd5a5d5a0000003: 0000 [#1] SMP KASAN NOPTI KASAN: maybe wild-memory-access in range [0xdead4ead00000018-0xdead4ead0000001f] CPU: 1 UID: 0 PID: 6949 Comm: syz.0.335 Not tainted syzkaller #0 PREEMPT(full) Hardware name: Google Compute Engine/Google Compute Engine, BIOS Google 08/18/2025 RIP: 0010:smc_diag_msg_common_fill net/smc/smc_diag.c:44 [inline] RIP: 0010:__smc_diag_dump.constprop.0+0x3ca/0x2550 net/smc/smc_diag.c:89 Call Trace: <TASK> smc_diag_dump_proto+0x26d/0x420 net/smc/smc_diag.c:217 smc_diag_dump+0x27/0x90 net/smc/smc_diag.c:234 netlink_dump+0x539/0xd30 net/netlink/af_netlink.c:2327 __netlink_dump_start+0x6d6/0x990 net/netlink/af_netlink.c:2442 netlink_dump_start include/linux/netlink.h:341 [inline] smc_diag_handler_dump+0x1f9/0x240 net/smc/smc_diag.c:251 __sock_diag_cmd net/core/sock_diag.c:249 [inline] sock_diag_rcv_msg+0x438/0x790 net/core/sock_diag.c:285 netlink_rcv_skb+0x158/0x420 net/netlink/af_netlink.c:2552 netlink_unicast_kernel net/netlink/af_netlink.c:1320 [inline] netlink_unicast+0x5a7/0x870 net/netlink/af_netlink.c:1346 netlink_sendmsg+0x8d1/0xdd0 net/netlink/af_netlink.c:1896 sock_sendmsg_nosec net/socket.c:714 [inline] __sock_sendmsg net/socket.c:729 [inline] ____sys_sendmsg+0xa95/0xc70 net/socket.c:2614 ___sys_sendmsg+0x134/0x1d0 net/socket.c:2668 __sys_sendmsg+0x16d/0x220 net/socket.c:2700 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0xcd/0x4e0 arch/x86/entry/syscall_64.c:94 entry_SYSCALL_64_after_hwframe+0x77/0x7f </TASK> The process like this: (CPU1) | (CPU2) ---------------------------------|------------------------------- inet_create() | // init clcsock to NULL | sk = sk_alloc() | | // unexpectedly change clcsock | inet_init_csk_locks() | | // add sk to hash table | smc_inet_init_sock() | smc_sk_init() | smc_hash_sk() | | // traverse the hash table | smc_diag_dump_proto | __smc_diag_dump() | // visit wrong clcsock | smc_diag_msg_common_fill() // alloc clcsock | smc_create_clcsk | sock_create_kern | With CONFIG_DEBUG_LOCK_ALLOC=y, the smc->clcsock is unexpectedly changed in inet_init_csk_locks(). The INET_PROTOSW_ICSK flag is no need by smc, just remove it. After removing the INET_PROTOSW_ICSK flag, this patch alse revert commit 6fd27ea183c2 ("net/smc: fix lacks of icsk_syn_mss with IPPROTO_SMC") to avoid casting smc_sock to inet_connection_sock.
Severity
No CVSS data available.
Assigner
References
Impacted products
Vendor Product Version CPE status
Linux Linux Affected: d25a92ccae6bed02327b63d138e12e7806830f78 , < 5b6fc95c4a161326567bdf12a333768565b638f2 (git)
Affected: d25a92ccae6bed02327b63d138e12e7806830f78 , < 99b5b3faf3220ba1cdab8e6e42be4f3f993937c3 (git)
Affected: d25a92ccae6bed02327b63d138e12e7806830f78 , < f584239a9ed25057496bf397c370cc5163dde419 (git)
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Linux Linux Affected: 6.11
Unaffected: 0 , < 6.11 (semver)
Unaffected: 6.12.56 , ≤ 6.12.* (semver)
Unaffected: 6.17.6 , ≤ 6.17.* (semver)
Unaffected: 6.18 , ≤ * (original_commit_for_fix)
guessed Create a notification for this product.
Show details on NVD website
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{
  "containers": {
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "net/smc/smc_inet.c"
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          "vendor": "Linux",
          "versions": [
            {
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              "version": "6.11"
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              "status": "unaffected",
              "version": "0",
              "versionType": "semver"
            },
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              "versionType": "semver"
            },
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              "version": "6.17.6",
              "versionType": "semver"
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              "versionType": "original_commit_for_fix"
            }
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                  "versionStartIncluding": "6.11",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.17.6",
                  "versionStartIncluding": "6.11",
                  "vulnerable": true
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                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.18",
                  "versionStartIncluding": "6.11",
                  "vulnerable": true
                }
              ],
              "negate": false,
              "operator": "OR"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nnet/smc: fix general protection fault in __smc_diag_dump\n\nThe syzbot report a crash:\n\n  Oops: general protection fault, probably for non-canonical address 0xfbd5a5d5a0000003: 0000 [#1] SMP KASAN NOPTI\n  KASAN: maybe wild-memory-access in range [0xdead4ead00000018-0xdead4ead0000001f]\n  CPU: 1 UID: 0 PID: 6949 Comm: syz.0.335 Not tainted syzkaller #0 PREEMPT(full)\n  Hardware name: Google Compute Engine/Google Compute Engine, BIOS Google 08/18/2025\n  RIP: 0010:smc_diag_msg_common_fill net/smc/smc_diag.c:44 [inline]\n  RIP: 0010:__smc_diag_dump.constprop.0+0x3ca/0x2550 net/smc/smc_diag.c:89\n  Call Trace:\n   \u003cTASK\u003e\n   smc_diag_dump_proto+0x26d/0x420 net/smc/smc_diag.c:217\n   smc_diag_dump+0x27/0x90 net/smc/smc_diag.c:234\n   netlink_dump+0x539/0xd30 net/netlink/af_netlink.c:2327\n   __netlink_dump_start+0x6d6/0x990 net/netlink/af_netlink.c:2442\n   netlink_dump_start include/linux/netlink.h:341 [inline]\n   smc_diag_handler_dump+0x1f9/0x240 net/smc/smc_diag.c:251\n   __sock_diag_cmd net/core/sock_diag.c:249 [inline]\n   sock_diag_rcv_msg+0x438/0x790 net/core/sock_diag.c:285\n   netlink_rcv_skb+0x158/0x420 net/netlink/af_netlink.c:2552\n   netlink_unicast_kernel net/netlink/af_netlink.c:1320 [inline]\n   netlink_unicast+0x5a7/0x870 net/netlink/af_netlink.c:1346\n   netlink_sendmsg+0x8d1/0xdd0 net/netlink/af_netlink.c:1896\n   sock_sendmsg_nosec net/socket.c:714 [inline]\n   __sock_sendmsg net/socket.c:729 [inline]\n   ____sys_sendmsg+0xa95/0xc70 net/socket.c:2614\n   ___sys_sendmsg+0x134/0x1d0 net/socket.c:2668\n   __sys_sendmsg+0x16d/0x220 net/socket.c:2700\n   do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]\n   do_syscall_64+0xcd/0x4e0 arch/x86/entry/syscall_64.c:94\n   entry_SYSCALL_64_after_hwframe+0x77/0x7f\n   \u003c/TASK\u003e\n\nThe process like this:\n\n               (CPU1)              |             (CPU2)\n  ---------------------------------|-------------------------------\n  inet_create()                    |\n    // init clcsock to NULL        |\n    sk = sk_alloc()                |\n                                   |\n    // unexpectedly change clcsock |\n    inet_init_csk_locks()          |\n                                   |\n    // add sk to hash table        |\n    smc_inet_init_sock()           |\n      smc_sk_init()                |\n        smc_hash_sk()              |\n                                   | // traverse the hash table\n                                   | smc_diag_dump_proto\n                                   |   __smc_diag_dump()\n                                   |     // visit wrong clcsock\n                                   |     smc_diag_msg_common_fill()\n    // alloc clcsock               |\n    smc_create_clcsk               |\n      sock_create_kern             |\n\nWith CONFIG_DEBUG_LOCK_ALLOC=y, the smc-\u003eclcsock is unexpectedly changed\nin inet_init_csk_locks(). The INET_PROTOSW_ICSK flag is no need by smc,\njust remove it.\n\nAfter removing the INET_PROTOSW_ICSK flag, this patch alse revert\ncommit 6fd27ea183c2 (\"net/smc: fix lacks of icsk_syn_mss with IPPROTO_SMC\")\nto avoid casting smc_sock to inet_connection_sock."
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-05-11T21:47:48.416Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
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          "url": "https://git.kernel.org/stable/c/5b6fc95c4a161326567bdf12a333768565b638f2"
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        {
          "url": "https://git.kernel.org/stable/c/99b5b3faf3220ba1cdab8e6e42be4f3f993937c3"
        },
        {
          "url": "https://git.kernel.org/stable/c/f584239a9ed25057496bf397c370cc5163dde419"
        }
      ],
      "title": "net/smc: fix general protection fault in __smc_diag_dump",
      "x_generator": {
        "engine": "bippy-1.2.0"
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "cveId": "CVE-2025-40357",
    "datePublished": "2025-12-16T13:30:29.758Z",
    "dateReserved": "2025-04-16T07:20:57.187Z",
    "dateUpdated": "2026-05-11T21:47:48.416Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2",
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    "epss": {
      "cve": "CVE-2025-40357",
      "date": "2026-09-20",
      "epss": "0.00197",
      "percentile": "0.09777"
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                "programFiles": [
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        "cveTags": [],
        "descriptions": [
          {
            "lang": "en",
            "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nnet/smc: fix general protection fault in __smc_diag_dump\n\nThe syzbot report a crash:\n\n  Oops: general protection fault, probably for non-canonical address 0xfbd5a5d5a0000003: 0000 [#1] SMP KASAN NOPTI\n  KASAN: maybe wild-memory-access in range [0xdead4ead00000018-0xdead4ead0000001f]\n  CPU: 1 UID: 0 PID: 6949 Comm: syz.0.335 Not tainted syzkaller #0 PREEMPT(full)\n  Hardware name: Google Compute Engine/Google Compute Engine, BIOS Google 08/18/2025\n  RIP: 0010:smc_diag_msg_common_fill net/smc/smc_diag.c:44 [inline]\n  RIP: 0010:__smc_diag_dump.constprop.0+0x3ca/0x2550 net/smc/smc_diag.c:89\n  Call Trace:\n   \u003cTASK\u003e\n   smc_diag_dump_proto+0x26d/0x420 net/smc/smc_diag.c:217\n   smc_diag_dump+0x27/0x90 net/smc/smc_diag.c:234\n   netlink_dump+0x539/0xd30 net/netlink/af_netlink.c:2327\n   __netlink_dump_start+0x6d6/0x990 net/netlink/af_netlink.c:2442\n   netlink_dump_start include/linux/netlink.h:341 [inline]\n   smc_diag_handler_dump+0x1f9/0x240 net/smc/smc_diag.c:251\n   __sock_diag_cmd net/core/sock_diag.c:249 [inline]\n   sock_diag_rcv_msg+0x438/0x790 net/core/sock_diag.c:285\n   netlink_rcv_skb+0x158/0x420 net/netlink/af_netlink.c:2552\n   netlink_unicast_kernel net/netlink/af_netlink.c:1320 [inline]\n   netlink_unicast+0x5a7/0x870 net/netlink/af_netlink.c:1346\n   netlink_sendmsg+0x8d1/0xdd0 net/netlink/af_netlink.c:1896\n   sock_sendmsg_nosec net/socket.c:714 [inline]\n   __sock_sendmsg net/socket.c:729 [inline]\n   ____sys_sendmsg+0xa95/0xc70 net/socket.c:2614\n   ___sys_sendmsg+0x134/0x1d0 net/socket.c:2668\n   __sys_sendmsg+0x16d/0x220 net/socket.c:2700\n   do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]\n   do_syscall_64+0xcd/0x4e0 arch/x86/entry/syscall_64.c:94\n   entry_SYSCALL_64_after_hwframe+0x77/0x7f\n   \u003c/TASK\u003e\n\nThe process like this:\n\n               (CPU1)              |             (CPU2)\n  ---------------------------------|-------------------------------\n  inet_create()                    |\n    // init clcsock to NULL        |\n    sk = sk_alloc()                |\n                                   |\n    // unexpectedly change clcsock |\n    inet_init_csk_locks()          |\n                                   |\n    // add sk to hash table        |\n    smc_inet_init_sock()           |\n      smc_sk_init()                |\n        smc_hash_sk()              |\n                                   | // traverse the hash table\n                                   | smc_diag_dump_proto\n                                   |   __smc_diag_dump()\n                                   |     // visit wrong clcsock\n                                   |     smc_diag_msg_common_fill()\n    // alloc clcsock               |\n    smc_create_clcsk               |\n      sock_create_kern             |\n\nWith CONFIG_DEBUG_LOCK_ALLOC=y, the smc-\u003eclcsock is unexpectedly changed\nin inet_init_csk_locks(). The INET_PROTOSW_ICSK flag is no need by smc,\njust remove it.\n\nAfter removing the INET_PROTOSW_ICSK flag, this patch alse revert\ncommit 6fd27ea183c2 (\"net/smc: fix lacks of icsk_syn_mss with IPPROTO_SMC\")\nto avoid casting smc_sock to inet_connection_sock."
          }
        ],
        "id": "CVE-2025-40357",
        "lastModified": "2026-06-17T09:21:42.710",
        "metrics": {},
        "published": "2025-12-16T14:15:47.637",
        "references": [
          {
            "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
            "url": "https://git.kernel.org/stable/c/5b6fc95c4a161326567bdf12a333768565b638f2"
          },
          {
            "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
            "url": "https://git.kernel.org/stable/c/99b5b3faf3220ba1cdab8e6e42be4f3f993937c3"
          },
          {
            "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
            "url": "https://git.kernel.org/stable/c/f584239a9ed25057496bf397c370cc5163dde419"
          }
        ],
        "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "vulnStatus": "Deferred"
      }
    },
    "redhat_vex": {
      "aggregate_severity": "Low",
      "current_release_date": "2026-06-30T10:34:38+00:00",
      "cve": "CVE-2025-40357",
      "id": "CVE-2025-40357",
      "initial_release_date": "2025-12-16T00:00:00+00:00",
      "product_status:known_affected": "184",
      "product_status:known_not_affected": "90",
      "source": "Red Hat CSAF VEX",
      "status": "final",
      "title": "kernel: net/smc: fix general protection fault in __smc_diag_dump",
      "url": "https://security.access.redhat.com/data/csaf/v2/vex/2025/cve-2025-40357.json",
      "version": "3"
    }
  }
}



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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.

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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.
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  • 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.


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