CVE-2026-90175 (GCVE-0-2026-90175)
Vulnerability from cvelistv5
Published
2026-09-17 16:07
Modified
2026-10-19 08:59
Severity ?
Summary
In the Linux kernel, the following vulnerability has been resolved: smb: server: fix leak of ksmbd_ipc_login_request_ext() returned buffer Free it unconditionally after ksmbd_alloc_user() calls. kmemleak splat: unreferenced object 0xffff888103b83540 (size 192): comm "pool-0", pid 16970, jiffies 4377290937 hex dump (first 32 bytes): 00 00 00 00 01 00 00 00 00 00 00 00 00 00 00 00 ................ 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................ backtrace (crc 408ccc66): __kvmalloc_node_noprof+0x730/0x920 handle_generic_event+0xec/0x1a0 [ksmbd] genl_family_rcv_msg_doit+0xe0/0x130 genl_rcv_msg+0x181/0x290 netlink_rcv_skb+0x4f/0x100 genl_rcv+0x28/0x40 netlink_unicast+0x1e6/0x2c0 netlink_sendmsg+0x20a/0x450 ____sys_sendmsg+0x2e8/0x310 ___sys_sendmsg+0x78/0xc0 __sys_sendmsg+0x63/0xc0 do_syscall_64+0xa1/0x670 entry_SYSCALL_64_after_hwframe+0x76/0x7e
References
Impacted products
Vendor Product Version
Linux Linux Version: 8a3cd890fd2a7d016a821a1c9dfd8a84d45ad320
Version: a77e0e02af1c2db5fc040511aa78a58a52e116ab
Version: a77e0e02af1c2db5fc040511aa78a58a52e116ab
Version: a77e0e02af1c2db5fc040511aa78a58a52e116ab
Version: a77e0e02af1c2db5fc040511aa78a58a52e116ab
Version: 6.6.141   ≤
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{
  "containers": {
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "fs/smb/server/auth.c",
            "fs/smb/server/mgmt/user_config.c"
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          "product": "Linux",
          "programFiles": [
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            "fs/smb/server/mgmt/user_config.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
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              "version": "6.12"
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              "version": "0",
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              "version": "6.12.110",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.18.*",
              "status": "unaffected",
              "version": "6.18.52",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "7.2.*",
              "status": "unaffected",
              "version": "7.2.6",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "*",
              "status": "unaffected",
              "version": "7.3",
              "versionType": "original_commit_for_fix"
            }
          ]
        }
      ],
      "cpeApplicability": [
        {
          "nodes": [
            {
              "cpeMatch": [
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                  "vulnerable": true
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              "negate": false,
              "operator": "OR"
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      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nsmb: server: fix leak of ksmbd_ipc_login_request_ext() returned buffer\n\nFree it unconditionally after ksmbd_alloc_user() calls.\n\nkmemleak splat:\n  unreferenced object 0xffff888103b83540 (size 192):\n    comm \"pool-0\", pid 16970, jiffies 4377290937\n    hex dump (first 32 bytes):\n      00 00 00 00 01 00 00 00 00 00 00 00 00 00 00 00  ................\n      00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00  ................\n    backtrace (crc 408ccc66):\n      __kvmalloc_node_noprof+0x730/0x920\n      handle_generic_event+0xec/0x1a0 [ksmbd]\n      genl_family_rcv_msg_doit+0xe0/0x130\n      genl_rcv_msg+0x181/0x290\n      netlink_rcv_skb+0x4f/0x100\n      genl_rcv+0x28/0x40\n      netlink_unicast+0x1e6/0x2c0\n      netlink_sendmsg+0x20a/0x450\n      ____sys_sendmsg+0x2e8/0x310\n      ___sys_sendmsg+0x78/0xc0\n      __sys_sendmsg+0x63/0xc0\n      do_syscall_64+0xa1/0x670\n      entry_SYSCALL_64_after_hwframe+0x76/0x7e"
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-10-19T08:59:12.437Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
      "references": [
        {
          "url": "https://git.kernel.org/stable/c/4d6fe49fa3e7fbd779c761518e6572e340233c9b"
        },
        {
          "url": "https://git.kernel.org/stable/c/c9f2872e91b9fe99c1d0ba768906f7aeb48c8517"
        },
        {
          "url": "https://git.kernel.org/stable/c/7a98c3b903b10c4d6176948254012b5ca24b071b"
        },
        {
          "url": "https://git.kernel.org/stable/c/abb5146b2d8197d695ea9eaa0847c73e34f00985"
        },
        {
          "url": "https://git.kernel.org/stable/c/1c3ebf832d010c08afe1359215d4121cb1ed2de5"
        }
      ],
      "title": "smb: server: fix leak of ksmbd_ipc_login_request_ext() returned buffer",
      "x_generator": {
        "engine": "bippy-1.2.0"
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "cveId": "CVE-2026-90175",
    "datePublished": "2026-09-17T16:07:01.769Z",
    "dateReserved": "2026-09-11T19:38:34.791Z",
    "dateUpdated": "2026-10-19T08:59:12.437Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}


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