CVE-2026-64448 (GCVE-0-2026-64448)

Vulnerability from cvelistv5 – Published: 2026-07-25 08:51 – Updated: 2026-07-25 08:51
VLAI
Title
smb: client: restrict implied bcc[0] exemption to responses without data area
Summary
In the Linux kernel, the following vulnerability has been resolved: smb: client: restrict implied bcc[0] exemption to responses without data area smb2_check_message() has a long-standing quirk that accepts a response whose calculated length is one byte larger than the bytes actually received ("server can return one byte more due to implied bcc[0]"). This was introduced to accommodate servers that omit the trailing bcc[0] overlap byte when no data area is present. However, the exemption is applied unconditionally, regardless of whether the command actually carries a data area (has_smb2_data_area[]). When a response with a data area is subject to the +1 exemption, the reported data can extend one byte beyond the bytes actually received, yet smb2_check_message() still accepts it. The subsequent decoder then reads past the end of the receive buffer. This is reachable during NEGOTIATE and SESSION_SETUP, before the session is established. The resulting out-of-bounds reads are visible under KASAN when mounting against a non-conforming server; both the SPNEGO/negTokenInit and the NTLMSSP challenge decoders are affected: BUG: KASAN: slab-out-of-bounds in asn1_ber_decoder+0x16a7/0x1b00 Read of size 1 at addr ffff8880084d67c0 by task mount.cifs/81 CPU: 1 UID: 0 PID: 81 Comm: mount.cifs Not tainted 7.1.0-rc6 #1 Call Trace: <TASK> dump_stack_lvl+0x4e/0x70 print_report+0x157/0x4c9 kasan_report+0xce/0x100 asn1_ber_decoder+0x16a7/0x1b00 decode_negTokenInit+0x19/0x30 SMB2_negotiate+0x31d9/0x4c90 cifs_negotiate_protocol+0x1f2/0x3f0 cifs_get_smb_ses+0x93f/0x17e0 cifs_mount_get_session+0x7f/0x3a0 cifs_mount+0xb4/0xcf0 cifs_smb3_do_mount+0x23a/0x1500 smb3_get_tree+0x3b0/0x630 vfs_get_tree+0x82/0x2d0 fc_mount+0x10/0x1b0 path_mount+0x50d/0x1de0 __x64_sys_mount+0x20b/0x270 do_syscall_64+0xee/0x590 entry_SYSCALL_64_after_hwframe+0x77/0x7f </TASK> Allocated by task 85: kmem_cache_alloc_noprof+0x106/0x380 mempool_alloc_noprof+0x116/0x1e0 cifs_small_buf_get+0x31/0x80 allocate_buffers+0x10d/0x2b0 cifs_demultiplex_thread+0x1d5/0x1d50 kthread+0x2c6/0x390 ret_from_fork+0x36e/0x5a0 ret_from_fork_asm+0x1a/0x30 The buggy address is located 0 bytes to the right of allocated 448-byte region [ffff8880084d6600, ffff8880084d67c0) which belongs to the cache cifs_small_rq of size 448 BUG: KASAN: slab-out-of-bounds in kmemdup_noprof+0x36/0x50 Read of size 329 at addr ffff88800726c678 by task mount.cifs/89 CPU: 0 UID: 0 PID: 89 Comm: mount.cifs Tainted: G B 7.1.0-rc6 #1 Call Trace: <TASK> dump_stack_lvl+0x4e/0x70 print_report+0x157/0x4c9 kasan_report+0xce/0x100 kasan_check_range+0x10f/0x1e0 __asan_memcpy+0x23/0x60 kmemdup_noprof+0x36/0x50 decode_ntlmssp_challenge+0x457/0x680 SMB2_sess_auth_rawntlmssp_negotiate+0x6f0/0xcb0 SMB2_sess_setup+0x219/0x4f0 cifs_setup_session+0x248/0xaf0 cifs_get_smb_ses+0xf79/0x17e0 cifs_mount_get_session+0x7f/0x3a0 cifs_mount+0xb4/0xcf0 cifs_smb3_do_mount+0x23a/0x1500 smb3_get_tree+0x3b0/0x630 vfs_get_tree+0x82/0x2d0 fc_mount+0x10/0x1b0 path_mount+0x50d/0x1de0 __x64_sys_mount+0x20b/0x270 do_syscall_64+0xee/0x590 entry_SYSCALL_64_after_hwframe+0x77/0x7f </TASK> Allocated by task 93: kmem_cache_alloc_noprof+0x106/0x380 mempool_alloc_noprof+0x116/0x1e0 cifs_small_buf_get+0x31/0x80 allocate_buffers+0x10d/0x2b0 cifs_demultiplex_thread+0x1d5/0x1d50 kthread+0x2c6/0x390 ret_from_fork+0x36e/0x5a0 ret_from_fork_asm+0x1a/0x30 The buggy address is located 120 bytes inside of allocated 448-byte region [ffff88800726c600, ffff88800726c7c0) which belongs to the cache cifs_small_rq of size 448 Restrict the +1 exemption to responses that have no data area, so that it still covers the bcc[0] omission it was meant for. When a data area is present, the +1 discrepancy instead means the reported data length overruns the ---truncated---
Severity
No CVSS data available.
Assigner
References
Impacted products
Vendor Product Version
Linux Linux Affected: 093b2bdad3221e3fae3c26d89387e7297a157664 , < 8d0bbc78046d264bbf6a574ea6f9072258a43e35 (git)
Affected: 093b2bdad3221e3fae3c26d89387e7297a157664 , < b6a381c01e2ac98a48e32ac0f2a45bbadd9e26b0 (git)
Affected: 093b2bdad3221e3fae3c26d89387e7297a157664 , < 31c6312608c60b72a1feb99a5afb680645a3e8a3 (git)
Affected: 093b2bdad3221e3fae3c26d89387e7297a157664 , < 573e502d14714d2947e22e7eff40ec20a6a44a42 (git)
Affected: 093b2bdad3221e3fae3c26d89387e7297a157664 , < 419ec1b604d7fb60c10aec2dc062371f9fcd4940 (git)
Affected: 093b2bdad3221e3fae3c26d89387e7297a157664 , < ceb875a375dedbf51c9425c1d13a2d7a8435c08c (git)
Affected: 093b2bdad3221e3fae3c26d89387e7297a157664 , < 6e9d10f62773b99bd927940fd9cbdfe7207e23ff (git)
Affected: 093b2bdad3221e3fae3c26d89387e7297a157664 , < 53b7c271f06be4dd5cfc8c6ef552a8355c891a7f (git)
Create a notification for this product.
Linux Linux Affected: 3.6
Unaffected: 0 , < 3.6 (semver)
Unaffected: 5.10.261 , ≤ 5.10.* (semver)
Unaffected: 5.15.212 , ≤ 5.15.* (semver)
Unaffected: 6.1.178 , ≤ 6.1.* (semver)
Unaffected: 6.6.145 , ≤ 6.6.* (semver)
Unaffected: 6.12.96 , ≤ 6.12.* (semver)
Unaffected: 6.18.39 , ≤ 6.18.* (semver)
Unaffected: 7.1.4 , ≤ 7.1.* (semver)
Unaffected: 7.2-rc3 , ≤ * (original_commit_for_fix)
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{
  "containers": {
    "cna": {
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        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "fs/smb/client/smb2misc.c"
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              "status": "unaffected",
              "version": "5.15.212",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.1.*",
              "status": "unaffected",
              "version": "6.1.178",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.6.*",
              "status": "unaffected",
              "version": "6.6.145",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.12.*",
              "status": "unaffected",
              "version": "6.12.96",
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            },
            {
              "lessThanOrEqual": "6.18.*",
              "status": "unaffected",
              "version": "6.18.39",
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            {
              "lessThanOrEqual": "7.1.*",
              "status": "unaffected",
              "version": "7.1.4",
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            {
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              "status": "unaffected",
              "version": "7.2-rc3",
              "versionType": "original_commit_for_fix"
            }
          ]
        }
      ],
      "cpeApplicability": [
        {
          "nodes": [
            {
              "cpeMatch": [
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                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "5.10.261",
                  "versionStartIncluding": "3.6",
                  "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: client: restrict implied bcc[0] exemption to responses without data area\n\nsmb2_check_message() has a long-standing quirk that accepts a response\nwhose calculated length is one byte larger than the bytes actually\nreceived (\"server can return one byte more due to implied bcc[0]\").\nThis was introduced to accommodate servers that omit the trailing bcc[0]\noverlap byte when no data area is present.\n\nHowever, the exemption is applied unconditionally, regardless of whether\nthe command actually carries a data area (has_smb2_data_area[]).  When a\nresponse with a data area is subject to the +1 exemption, the reported\ndata can extend one byte beyond the bytes actually received, yet\nsmb2_check_message() still accepts it.  The subsequent decoder then reads\npast the end of the receive buffer.  This is reachable during NEGOTIATE\nand SESSION_SETUP, before the session is established.\n\nThe resulting out-of-bounds reads are visible under KASAN when mounting\nagainst a non-conforming server; both the SPNEGO/negTokenInit and the\nNTLMSSP challenge decoders are affected:\n\n  BUG: KASAN: slab-out-of-bounds in asn1_ber_decoder+0x16a7/0x1b00\n  Read of size 1 at addr ffff8880084d67c0 by task mount.cifs/81\n  CPU: 1 UID: 0 PID: 81 Comm: mount.cifs Not tainted 7.1.0-rc6 #1\n  Call Trace:\n   \u003cTASK\u003e\n   dump_stack_lvl+0x4e/0x70\n   print_report+0x157/0x4c9\n   kasan_report+0xce/0x100\n   asn1_ber_decoder+0x16a7/0x1b00\n   decode_negTokenInit+0x19/0x30\n   SMB2_negotiate+0x31d9/0x4c90\n   cifs_negotiate_protocol+0x1f2/0x3f0\n   cifs_get_smb_ses+0x93f/0x17e0\n   cifs_mount_get_session+0x7f/0x3a0\n   cifs_mount+0xb4/0xcf0\n   cifs_smb3_do_mount+0x23a/0x1500\n   smb3_get_tree+0x3b0/0x630\n   vfs_get_tree+0x82/0x2d0\n   fc_mount+0x10/0x1b0\n   path_mount+0x50d/0x1de0\n   __x64_sys_mount+0x20b/0x270\n   do_syscall_64+0xee/0x590\n   entry_SYSCALL_64_after_hwframe+0x77/0x7f\n   \u003c/TASK\u003e\n  Allocated by task 85:\n   kmem_cache_alloc_noprof+0x106/0x380\n   mempool_alloc_noprof+0x116/0x1e0\n   cifs_small_buf_get+0x31/0x80\n   allocate_buffers+0x10d/0x2b0\n   cifs_demultiplex_thread+0x1d5/0x1d50\n   kthread+0x2c6/0x390\n   ret_from_fork+0x36e/0x5a0\n   ret_from_fork_asm+0x1a/0x30\n  The buggy address is located 0 bytes to the right of\n   allocated 448-byte region [ffff8880084d6600, ffff8880084d67c0)\n   which belongs to the cache cifs_small_rq of size 448\n\n  BUG: KASAN: slab-out-of-bounds in kmemdup_noprof+0x36/0x50\n  Read of size 329 at addr ffff88800726c678 by task mount.cifs/89\n  CPU: 0 UID: 0 PID: 89 Comm: mount.cifs Tainted: G    B      7.1.0-rc6 #1\n  Call Trace:\n   \u003cTASK\u003e\n   dump_stack_lvl+0x4e/0x70\n   print_report+0x157/0x4c9\n   kasan_report+0xce/0x100\n   kasan_check_range+0x10f/0x1e0\n   __asan_memcpy+0x23/0x60\n   kmemdup_noprof+0x36/0x50\n   decode_ntlmssp_challenge+0x457/0x680\n   SMB2_sess_auth_rawntlmssp_negotiate+0x6f0/0xcb0\n   SMB2_sess_setup+0x219/0x4f0\n   cifs_setup_session+0x248/0xaf0\n   cifs_get_smb_ses+0xf79/0x17e0\n   cifs_mount_get_session+0x7f/0x3a0\n   cifs_mount+0xb4/0xcf0\n   cifs_smb3_do_mount+0x23a/0x1500\n   smb3_get_tree+0x3b0/0x630\n   vfs_get_tree+0x82/0x2d0\n   fc_mount+0x10/0x1b0\n   path_mount+0x50d/0x1de0\n   __x64_sys_mount+0x20b/0x270\n   do_syscall_64+0xee/0x590\n   entry_SYSCALL_64_after_hwframe+0x77/0x7f\n   \u003c/TASK\u003e\n  Allocated by task 93:\n   kmem_cache_alloc_noprof+0x106/0x380\n   mempool_alloc_noprof+0x116/0x1e0\n   cifs_small_buf_get+0x31/0x80\n   allocate_buffers+0x10d/0x2b0\n   cifs_demultiplex_thread+0x1d5/0x1d50\n   kthread+0x2c6/0x390\n   ret_from_fork+0x36e/0x5a0\n   ret_from_fork_asm+0x1a/0x30\n  The buggy address is located 120 bytes inside of\n   allocated 448-byte region [ffff88800726c600, ffff88800726c7c0)\n   which belongs to the cache cifs_small_rq of size 448\n\nRestrict the +1 exemption to responses that have no data area, so that\nit still covers the bcc[0] omission it was meant for.  When a data area\nis present, the +1 discrepancy instead means the reported data length\noverruns the\n---truncated---"
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-07-25T08:51:18.796Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
      "references": [
        {
          "url": "https://git.kernel.org/stable/c/8d0bbc78046d264bbf6a574ea6f9072258a43e35"
        },
        {
          "url": "https://git.kernel.org/stable/c/b6a381c01e2ac98a48e32ac0f2a45bbadd9e26b0"
        },
        {
          "url": "https://git.kernel.org/stable/c/31c6312608c60b72a1feb99a5afb680645a3e8a3"
        },
        {
          "url": "https://git.kernel.org/stable/c/573e502d14714d2947e22e7eff40ec20a6a44a42"
        },
        {
          "url": "https://git.kernel.org/stable/c/419ec1b604d7fb60c10aec2dc062371f9fcd4940"
        },
        {
          "url": "https://git.kernel.org/stable/c/ceb875a375dedbf51c9425c1d13a2d7a8435c08c"
        },
        {
          "url": "https://git.kernel.org/stable/c/6e9d10f62773b99bd927940fd9cbdfe7207e23ff"
        },
        {
          "url": "https://git.kernel.org/stable/c/53b7c271f06be4dd5cfc8c6ef552a8355c891a7f"
        }
      ],
      "title": "smb: client: restrict implied bcc[0] exemption to responses without data area",
      "x_generator": {
        "engine": "bippy-1.2.0"
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "cveId": "CVE-2026-64448",
    "datePublished": "2026-07-25T08:51:18.796Z",
    "dateReserved": "2026-07-19T15:36:31.788Z",
    "dateUpdated": "2026-07-25T08:51:18.796Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2",
  "vulnerability-lookup:meta": {
    "epss": {
      "cve": "CVE-2026-64448",
      "date": "2026-07-26",
      "epss": "0.00184",
      "percentile": "0.08312"
    },
    "nvd": "{\"cve\":{\"id\":\"CVE-2026-64448\",\"sourceIdentifier\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"published\":\"2026-07-25T10:17:29.557\",\"lastModified\":\"2026-07-25T10:17:29.557\",\"vulnStatus\":\"Received\",\"cveTags\":[],\"descriptions\":[{\"lang\":\"en\",\"value\":\"In the Linux kernel, the following vulnerability has been resolved:\\n\\nsmb: client: restrict implied bcc[0] exemption to responses without data area\\n\\nsmb2_check_message() has a long-standing quirk that accepts a response\\nwhose calculated length is one byte larger than the bytes actually\\nreceived (\\\"server can return one byte more due to implied bcc[0]\\\").\\nThis was introduced to accommodate servers that omit the trailing bcc[0]\\noverlap byte when no data area is present.\\n\\nHowever, the exemption is applied unconditionally, regardless of whether\\nthe command actually carries a data area (has_smb2_data_area[]).  When a\\nresponse with a data area is subject to the +1 exemption, the reported\\ndata can extend one byte beyond the bytes actually received, yet\\nsmb2_check_message() still accepts it.  The subsequent decoder then reads\\npast the end of the receive buffer.  This is reachable during NEGOTIATE\\nand SESSION_SETUP, before the session is established.\\n\\nThe resulting out-of-bounds reads are visible under KASAN when mounting\\nagainst a non-conforming server; both the SPNEGO/negTokenInit and the\\nNTLMSSP challenge decoders are affected:\\n\\n  BUG: KASAN: slab-out-of-bounds in asn1_ber_decoder+0x16a7/0x1b00\\n  Read of size 1 at addr ffff8880084d67c0 by task mount.cifs/81\\n  CPU: 1 UID: 0 PID: 81 Comm: mount.cifs Not tainted 7.1.0-rc6 #1\\n  Call Trace:\\n   \u003cTASK\u003e\\n   dump_stack_lvl+0x4e/0x70\\n   print_report+0x157/0x4c9\\n   kasan_report+0xce/0x100\\n   asn1_ber_decoder+0x16a7/0x1b00\\n   decode_negTokenInit+0x19/0x30\\n   SMB2_negotiate+0x31d9/0x4c90\\n   cifs_negotiate_protocol+0x1f2/0x3f0\\n   cifs_get_smb_ses+0x93f/0x17e0\\n   cifs_mount_get_session+0x7f/0x3a0\\n   cifs_mount+0xb4/0xcf0\\n   cifs_smb3_do_mount+0x23a/0x1500\\n   smb3_get_tree+0x3b0/0x630\\n   vfs_get_tree+0x82/0x2d0\\n   fc_mount+0x10/0x1b0\\n   path_mount+0x50d/0x1de0\\n   __x64_sys_mount+0x20b/0x270\\n   do_syscall_64+0xee/0x590\\n   entry_SYSCALL_64_after_hwframe+0x77/0x7f\\n   \u003c/TASK\u003e\\n  Allocated by task 85:\\n   kmem_cache_alloc_noprof+0x106/0x380\\n   mempool_alloc_noprof+0x116/0x1e0\\n   cifs_small_buf_get+0x31/0x80\\n   allocate_buffers+0x10d/0x2b0\\n   cifs_demultiplex_thread+0x1d5/0x1d50\\n   kthread+0x2c6/0x390\\n   ret_from_fork+0x36e/0x5a0\\n   ret_from_fork_asm+0x1a/0x30\\n  The buggy address is located 0 bytes to the right of\\n   allocated 448-byte region [ffff8880084d6600, ffff8880084d67c0)\\n   which belongs to the cache cifs_small_rq of size 448\\n\\n  BUG: KASAN: slab-out-of-bounds in kmemdup_noprof+0x36/0x50\\n  Read of size 329 at addr ffff88800726c678 by task mount.cifs/89\\n  CPU: 0 UID: 0 PID: 89 Comm: mount.cifs Tainted: G    B      7.1.0-rc6 #1\\n  Call Trace:\\n   \u003cTASK\u003e\\n   dump_stack_lvl+0x4e/0x70\\n   print_report+0x157/0x4c9\\n   kasan_report+0xce/0x100\\n   kasan_check_range+0x10f/0x1e0\\n   __asan_memcpy+0x23/0x60\\n   kmemdup_noprof+0x36/0x50\\n   decode_ntlmssp_challenge+0x457/0x680\\n   SMB2_sess_auth_rawntlmssp_negotiate+0x6f0/0xcb0\\n   SMB2_sess_setup+0x219/0x4f0\\n   cifs_setup_session+0x248/0xaf0\\n   cifs_get_smb_ses+0xf79/0x17e0\\n   cifs_mount_get_session+0x7f/0x3a0\\n   cifs_mount+0xb4/0xcf0\\n   cifs_smb3_do_mount+0x23a/0x1500\\n   smb3_get_tree+0x3b0/0x630\\n   vfs_get_tree+0x82/0x2d0\\n   fc_mount+0x10/0x1b0\\n   path_mount+0x50d/0x1de0\\n   __x64_sys_mount+0x20b/0x270\\n   do_syscall_64+0xee/0x590\\n   entry_SYSCALL_64_after_hwframe+0x77/0x7f\\n   \u003c/TASK\u003e\\n  Allocated by task 93:\\n   kmem_cache_alloc_noprof+0x106/0x380\\n   mempool_alloc_noprof+0x116/0x1e0\\n   cifs_small_buf_get+0x31/0x80\\n   allocate_buffers+0x10d/0x2b0\\n   cifs_demultiplex_thread+0x1d5/0x1d50\\n   kthread+0x2c6/0x390\\n   ret_from_fork+0x36e/0x5a0\\n   ret_from_fork_asm+0x1a/0x30\\n  The buggy address is located 120 bytes inside of\\n   allocated 448-byte region [ffff88800726c600, ffff88800726c7c0)\\n   which belongs to the cache cifs_small_rq of size 448\\n\\nRestrict the +1 exemption to responses that have no data area, so that\\nit still covers the bcc[0] omission it was meant for.  When a data area\\nis present, the +1 discrepancy instead means the reported data length\\noverruns the\\n---truncated---\"}],\"affected\":[{\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"affectedData\":[{\"vendor\":\"Linux\",\"product\":\"Linux\",\"defaultStatus\":\"unaffected\",\"programFiles\":[\"fs/smb/client/smb2misc.c\"],\"repo\":\"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\",\"versions\":[{\"version\":\"093b2bdad3221e3fae3c26d89387e7297a157664\",\"lessThan\":\"8d0bbc78046d264bbf6a574ea6f9072258a43e35\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"093b2bdad3221e3fae3c26d89387e7297a157664\",\"lessThan\":\"b6a381c01e2ac98a48e32ac0f2a45bbadd9e26b0\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"093b2bdad3221e3fae3c26d89387e7297a157664\",\"lessThan\":\"31c6312608c60b72a1feb99a5afb680645a3e8a3\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"093b2bdad3221e3fae3c26d89387e7297a157664\",\"lessThan\":\"573e502d14714d2947e22e7eff40ec20a6a44a42\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"093b2bdad3221e3fae3c26d89387e7297a157664\",\"lessThan\":\"419ec1b604d7fb60c10aec2dc062371f9fcd4940\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"093b2bdad3221e3fae3c26d89387e7297a157664\",\"lessThan\":\"ceb875a375dedbf51c9425c1d13a2d7a8435c08c\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"093b2bdad3221e3fae3c26d89387e7297a157664\",\"lessThan\":\"6e9d10f62773b99bd927940fd9cbdfe7207e23ff\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"093b2bdad3221e3fae3c26d89387e7297a157664\",\"lessThan\":\"53b7c271f06be4dd5cfc8c6ef552a8355c891a7f\",\"versionType\":\"git\",\"status\":\"affected\"}]},{\"vendor\":\"Linux\",\"product\":\"Linux\",\"defaultStatus\":\"affected\",\"programFiles\":[\"fs/smb/client/smb2misc.c\"],\"repo\":\"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\",\"versions\":[{\"version\":\"3.6\",\"status\":\"affected\"},{\"version\":\"0\",\"lessThan\":\"3.6\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"5.10.261\",\"lessThanOrEqual\":\"5.10.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"5.15.212\",\"lessThanOrEqual\":\"5.15.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"6.1.178\",\"lessThanOrEqual\":\"6.1.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"6.6.145\",\"lessThanOrEqual\":\"6.6.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"6.12.96\",\"lessThanOrEqual\":\"6.12.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"6.18.39\",\"lessThanOrEqual\":\"6.18.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"7.1.4\",\"lessThanOrEqual\":\"7.1.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"7.2-rc3\",\"lessThanOrEqual\":\"*\",\"versionType\":\"original_commit_for_fix\",\"status\":\"unaffected\"}]}]}],\"metrics\":{},\"references\":[{\"url\":\"https://git.kernel.org/stable/c/31c6312608c60b72a1feb99a5afb680645a3e8a3\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/419ec1b604d7fb60c10aec2dc062371f9fcd4940\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/53b7c271f06be4dd5cfc8c6ef552a8355c891a7f\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/573e502d14714d2947e22e7eff40ec20a6a44a42\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/6e9d10f62773b99bd927940fd9cbdfe7207e23ff\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/8d0bbc78046d264bbf6a574ea6f9072258a43e35\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/b6a381c01e2ac98a48e32ac0f2a45bbadd9e26b0\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/ceb875a375dedbf51c9425c1d13a2d7a8435c08c\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"}]}}",
    "suse_vex": {
      "aggregate_severity": "not set",
      "current_release_date": "2026-07-25T15:59:09Z",
      "cve": "CVE-2026-64448",
      "id": "CVE-2026-64448",
      "initial_release_date": "2026-07-25T15:59:09Z",
      "source": "SUSE CSAF VEX",
      "status": "interim",
      "title": "SUSE CVE CVE-2026-64448",
      "url": "https://ftp.suse.com/pub/projects/security/csaf-vex/cve-2026-64448.json",
      "version": "2"
    }
  }
}



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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.

Sightings

Author Source Type Date Other

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.
  • Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
  • 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.