{
  "schema_version": "1.6.1",
  "id": "RPI-CVE-2025-37750",
  "modified": "2026-10-07T17:22:01Z",
  "upstream": [
    "CVE-2025-37750"
  ],
  "published": "2025-05-01T13:03:03Z",
  "summary": "smb: client: fix UAF in decryption with multichannel",
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\nsmb: client: fix UAF in decryption with multichannel\n\nAfter commit f7025d861694 (\"smb: client: allocate crypto only for\nprimary server\") and commit b0abcd65ec54 (\"smb: client: fix UAF in\nasync decryption\"), the channels started reusing AEAD TFM from primary\nchannel to perform synchronous decryption, but that can't done as\nthere could be multiple cifsd threads (one per channel) simultaneously\naccessing it to perform decryption.\n\nThis fixes the following KASAN splat when running fstest generic/249\nwith 'vers=3.1.1,multichannel,max_channels=4,seal' against Windows\nServer 2022:\n\nBUG: KASAN: slab-use-after-free in gf128mul_4k_lle+0xba/0x110\nRead of size 8 at addr ffff8881046c18a0 by task cifsd/986\nCPU: 3 UID: 0 PID: 986 Comm: cifsd Not tainted 6.15.0-rc1 #1\nPREEMPT(voluntary)\nHardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-3.fc41\n04/01/2014\nCall Trace:\n <TASK>\n dump_stack_lvl+0x5d/0x80\n print_report+0x156/0x528\n ? gf128mul_4k_lle+0xba/0x110\n ? __virt_addr_valid+0x145/0x300\n ? __phys_addr+0x46/0x90\n ? gf128mul_4k_lle+0xba/0x110\n kasan_report+0xdf/0x1a0\n ? gf128mul_4k_lle+0xba/0x110\n gf128mul_4k_lle+0xba/0x110\n ghash_update+0x189/0x210\n shash_ahash_update+0x295/0x370\n ? __pfx_shash_ahash_update+0x10/0x10\n ? __pfx_shash_ahash_update+0x10/0x10\n ? __pfx_extract_iter_to_sg+0x10/0x10\n ? ___kmalloc_large_node+0x10e/0x180\n ? __asan_memset+0x23/0x50\n crypto_ahash_update+0x3c/0xc0\n gcm_hash_assoc_remain_continue+0x93/0xc0\n crypt_message+0xe09/0xec0 [cifs]\n ? __pfx_crypt_message+0x10/0x10 [cifs]\n ? _raw_spin_unlock+0x23/0x40\n ? __pfx_cifs_readv_from_socket+0x10/0x10 [cifs]\n decrypt_raw_data+0x229/0x380 [cifs]\n ? __pfx_decrypt_raw_data+0x10/0x10 [cifs]\n ? __pfx_cifs_read_iter_from_socket+0x10/0x10 [cifs]\n smb3_receive_transform+0x837/0xc80 [cifs]\n ? __pfx_smb3_receive_transform+0x10/0x10 [cifs]\n ? __pfx___might_resched+0x10/0x10\n ? __pfx_smb3_is_transform_hdr+0x10/0x10 [cifs]\n cifs_demultiplex_thread+0x692/0x1570 [cifs]\n ? __pfx_cifs_demultiplex_thread+0x10/0x10 [cifs]\n ? rcu_is_watching+0x20/0x50\n ? rcu_lockdep_current_cpu_online+0x62/0xb0\n ? find_held_lock+0x32/0x90\n ? kvm_sched_clock_read+0x11/0x20\n ? local_clock_noinstr+0xd/0xd0\n ? trace_irq_enable.constprop.0+0xa8/0xe0\n ? __pfx_cifs_demultiplex_thread+0x10/0x10 [cifs]\n kthread+0x1fe/0x380\n ? kthread+0x10f/0x380\n ? __pfx_kthread+0x10/0x10\n ? local_clock_noinstr+0xd/0xd0\n ? ret_from_fork+0x1b/0x60\n ? local_clock+0x15/0x30\n ? lock_release+0x29b/0x390\n ? rcu_is_watching+0x20/0x50\n ? __pfx_kthread+0x10/0x10\n ret_from_fork+0x31/0x60\n ? __pfx_kthread+0x10/0x10\n ret_from_fork_asm+0x1a/0x30\n </TASK>",
  "affected": [
    {
      "package": {
        "ecosystem": "Raspberry Pi OS:12",
        "name": "linux"
      },
      "versions": [
        "1:6.6.62-1+rpt1",
        "1:6.6.74-1+rpt1",
        "1:6.12.20-1+rpt1~bpo12+1"
      ],
      "ecosystem_specific": {
        "binaries": [
          {
            "binary_name": "linux-image-6.6.62+rpt-rpi-2712",
            "binary_version": "1:6.6.62-1+rpt1"
          },
          {
            "binary_name": "linux-image-6.6.62+rpt-rpi-v6",
            "binary_version": "1:6.6.62-1+rpt1"
          },
          {
            "binary_name": "linux-image-6.6.62+rpt-rpi-v7",
            "binary_version": "1:6.6.62-1+rpt1"
          },
          {
            "binary_name": "linux-image-6.6.62+rpt-rpi-v7l",
            "binary_version": "1:6.6.62-1+rpt1"
          },
          {
            "binary_name": "linux-image-6.6.62+rpt-rpi-v8",
            "binary_version": "1:6.6.62-1+rpt1"
          },
          {
            "binary_name": "linux-image-6.6.74+rpt-rpi-2712",
            "binary_version": "1:6.6.74-1+rpt1"
          },
          {
            "binary_name": "linux-image-6.6.74+rpt-rpi-v6",
            "binary_version": "1:6.6.74-1+rpt1"
          },
          {
            "binary_name": "linux-image-6.6.74+rpt-rpi-v7",
            "binary_version": "1:6.6.74-1+rpt1"
          },
          {
            "binary_name": "linux-image-6.6.74+rpt-rpi-v7l",
            "binary_version": "1:6.6.74-1+rpt1"
          },
          {
            "binary_name": "linux-image-6.6.74+rpt-rpi-v8",
            "binary_version": "1:6.6.74-1+rpt1"
          },
          {
            "binary_name": "linux-image-6.12.20+rpt-rpi-2712",
            "binary_version": "1:6.12.20-1+rpt1~bpo12+1"
          },
          {
            "binary_name": "linux-image-6.12.20+rpt-rpi-v6",
            "binary_version": "1:6.12.20-1+rpt1~bpo12+1"
          },
          {
            "binary_name": "linux-image-6.12.20+rpt-rpi-v7",
            "binary_version": "1:6.12.20-1+rpt1~bpo12+1"
          },
          {
            "binary_name": "linux-image-6.12.20+rpt-rpi-v7l",
            "binary_version": "1:6.12.20-1+rpt1~bpo12+1"
          },
          {
            "binary_name": "linux-image-6.12.20+rpt-rpi-v8",
            "binary_version": "1:6.12.20-1+rpt1~bpo12+1"
          }
        ]
      },
      "database_specific": {
        "per_version": {
          "1:6.6.62-1+rpt1": {
            "linux_commit": "dd2394360860d15146c96635796a75b05bb32b61",
            "upstream_version": "6.6.62",
            "assessment": "commit ancestry (strak rule)",
            "upstream_fixed": null
          },
          "1:6.6.74-1+rpt1": {
            "linux_commit": "a18d9ced4965462cb7b3b4252ada440395105308",
            "upstream_version": "6.6.74",
            "assessment": "commit ancestry (strak rule)",
            "upstream_fixed": null
          },
          "1:6.12.20-1+rpt1~bpo12+1": {
            "linux_commit": "cd231d4775b14f228606c09f219b48308f6ab3aa",
            "upstream_version": "6.12.20",
            "assessment": "commit ancestry (strak rule)",
            "upstream_fixed": "6.12.24"
          }
        }
      }
    },
    {
      "package": {
        "ecosystem": "Raspberry Pi OS:13",
        "name": "linux"
      },
      "versions": [
        "1:6.12.19-1+rpt1~bpo12+1",
        "1:6.12.19-1+rpt1",
        "1:6.12.20-1+rpt1"
      ],
      "ecosystem_specific": {
        "binaries": [
          {
            "binary_name": "linux-image-6.12.19+rpt-rpi-2712",
            "binary_version": "1:6.12.19-1+rpt1~bpo12+1"
          },
          {
            "binary_name": "linux-image-6.12.19+rpt-rpi-v6",
            "binary_version": "1:6.12.19-1+rpt1~bpo12+1"
          },
          {
            "binary_name": "linux-image-6.12.19+rpt-rpi-v7",
            "binary_version": "1:6.12.19-1+rpt1~bpo12+1"
          },
          {
            "binary_name": "linux-image-6.12.19+rpt-rpi-v7l",
            "binary_version": "1:6.12.19-1+rpt1~bpo12+1"
          },
          {
            "binary_name": "linux-image-6.12.19+rpt-rpi-v8",
            "binary_version": "1:6.12.19-1+rpt1~bpo12+1"
          },
          {
            "binary_name": "linux-image-6.12.19+rpt-rpi-2712",
            "binary_version": "1:6.12.19-1+rpt1"
          },
          {
            "binary_name": "linux-image-6.12.19+rpt-rpi-v6",
            "binary_version": "1:6.12.19-1+rpt1"
          },
          {
            "binary_name": "linux-image-6.12.19+rpt-rpi-v7",
            "binary_version": "1:6.12.19-1+rpt1"
          },
          {
            "binary_name": "linux-image-6.12.19+rpt-rpi-v7l",
            "binary_version": "1:6.12.19-1+rpt1"
          },
          {
            "binary_name": "linux-image-6.12.19+rpt-rpi-v8",
            "binary_version": "1:6.12.19-1+rpt1"
          },
          {
            "binary_name": "linux-image-6.12.20+rpt-rpi-2712",
            "binary_version": "1:6.12.20-1+rpt1"
          },
          {
            "binary_name": "linux-image-6.12.20+rpt-rpi-v6",
            "binary_version": "1:6.12.20-1+rpt1"
          },
          {
            "binary_name": "linux-image-6.12.20+rpt-rpi-v7",
            "binary_version": "1:6.12.20-1+rpt1"
          },
          {
            "binary_name": "linux-image-6.12.20+rpt-rpi-v7l",
            "binary_version": "1:6.12.20-1+rpt1"
          },
          {
            "binary_name": "linux-image-6.12.20+rpt-rpi-v8",
            "binary_version": "1:6.12.20-1+rpt1"
          }
        ]
      },
      "database_specific": {
        "per_version": {
          "1:6.12.19-1+rpt1~bpo12+1": {
            "linux_commit": "121c2c384b9c2f4790ffb31b2cd25c7d75c8fda0",
            "upstream_version": "6.12.19",
            "assessment": "commit ancestry (strak rule)",
            "upstream_fixed": "6.12.24"
          },
          "1:6.12.19-1+rpt1": {
            "linux_commit": "121c2c384b9c2f4790ffb31b2cd25c7d75c8fda0",
            "upstream_version": "6.12.19",
            "assessment": "commit ancestry (strak rule)",
            "upstream_fixed": "6.12.24"
          },
          "1:6.12.20-1+rpt1": {
            "linux_commit": "cd231d4775b14f228606c09f219b48308f6ab3aa",
            "upstream_version": "6.12.20",
            "assessment": "commit ancestry (strak rule)",
            "upstream_fixed": "6.12.24"
          }
        }
      }
    }
  ],
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://www.cve.org/CVERecord?id=CVE-2025-37750"
    },
    {
      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/aa5a1e4b882964eb79d5b5d1d1e8a1a5efbb1d15"
    },
    {
      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/e859b216d94668bc66330e61be201234f4413d1a"
    },
    {
      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/950557922c1298464749c216d8763e97faf5d0a6"
    },
    {
      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/9502dd5c7029902f4a425bf959917a5a9e7c0e50"
    }
  ],
  "database_specific": {
    "source": "https://git.kernel.org/pub/scm/linux/security/vulns.git",
    "upstream_modified": "2026-08-05T12:19:11Z"
  }
}