CVE-2025-40355 (GCVE-0-2025-40355)

Vulnerability from cvelistv5 – Published: 2025-12-16 13:30 – Updated: 2025-12-16 13:30
VLAI?
Title
sysfs: check visibility before changing group attribute ownership
Summary
In the Linux kernel, the following vulnerability has been resolved: sysfs: check visibility before changing group attribute ownership Since commit 0c17270f9b92 ("net: sysfs: Implement is_visible for phys_(port_id, port_name, switch_id)"), __dev_change_net_namespace() can hit WARN_ON() when trying to change owner of a file that isn't visible. See the trace below: WARNING: CPU: 6 PID: 2938 at net/core/dev.c:12410 __dev_change_net_namespace+0xb89/0xc30 CPU: 6 UID: 0 PID: 2938 Comm: incusd Not tainted 6.17.1-1-mainline #1 PREEMPT(full) 4b783b4a638669fb644857f484487d17cb45ed1f Hardware name: Framework Laptop 13 (AMD Ryzen 7040Series)/FRANMDCP07, BIOS 03.07 02/19/2025 RIP: 0010:__dev_change_net_namespace+0xb89/0xc30 [...] Call Trace: <TASK> ? if6_seq_show+0x30/0x50 do_setlink.isra.0+0xc7/0x1270 ? __nla_validate_parse+0x5c/0xcc0 ? security_capable+0x94/0x1a0 rtnl_newlink+0x858/0xc20 ? update_curr+0x8e/0x1c0 ? update_entity_lag+0x71/0x80 ? sched_balance_newidle+0x358/0x450 ? psi_task_switch+0x113/0x2a0 ? __pfx_rtnl_newlink+0x10/0x10 rtnetlink_rcv_msg+0x346/0x3e0 ? sched_clock+0x10/0x30 ? __pfx_rtnetlink_rcv_msg+0x10/0x10 netlink_rcv_skb+0x59/0x110 netlink_unicast+0x285/0x3c0 ? __alloc_skb+0xdb/0x1a0 netlink_sendmsg+0x20d/0x430 ____sys_sendmsg+0x39f/0x3d0 ? import_iovec+0x2f/0x40 ___sys_sendmsg+0x99/0xe0 __sys_sendmsg+0x8a/0xf0 do_syscall_64+0x81/0x970 ? __sys_bind+0xe3/0x110 ? syscall_exit_work+0x143/0x1b0 ? do_syscall_64+0x244/0x970 ? sock_alloc_file+0x63/0xc0 ? syscall_exit_work+0x143/0x1b0 ? do_syscall_64+0x244/0x970 ? alloc_fd+0x12e/0x190 ? put_unused_fd+0x2a/0x70 ? do_sys_openat2+0xa2/0xe0 ? syscall_exit_work+0x143/0x1b0 ? do_syscall_64+0x244/0x970 ? exc_page_fault+0x7e/0x1a0 entry_SYSCALL_64_after_hwframe+0x76/0x7e [...] </TASK> Fix this by checking is_visible() before trying to touch the attribute.
Severity ?
No CVSS data available.
Assigner
References
Impacted products
Vendor Product Version
Linux Linux Affected: 303a42769c4c4d8e5e3ad928df87eb36f8c1fa60 , < ac2c526e103285d80a0330b91a318f6c9276d35a (git)
Affected: 303a42769c4c4d8e5e3ad928df87eb36f8c1fa60 , < c7fbb8218b4ad35fec0bd2256d2b9c8d60331f33 (git)
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    Linux Linux Affected: 5.7
Unaffected: 0 , < 5.7 (semver)
Unaffected: 6.17.6 , ≤ 6.17.* (semver)
Unaffected: 6.18 , ≤ * (original_commit_for_fix)
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{
  "containers": {
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "fs/sysfs/group.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
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              "status": "affected",
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              "versionType": "git"
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          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
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              "version": "5.7"
            },
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              "status": "unaffected",
              "version": "0",
              "versionType": "semver"
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              "status": "unaffected",
              "version": "6.17.6",
              "versionType": "semver"
            },
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              "lessThanOrEqual": "*",
              "status": "unaffected",
              "version": "6.18",
              "versionType": "original_commit_for_fix"
            }
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        }
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      "cpeApplicability": [
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              "cpeMatch": [
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                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.17.6",
                  "versionStartIncluding": "5.7",
                  "vulnerable": true
                },
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                  "versionEndExcluding": "6.18",
                  "versionStartIncluding": "5.7",
                  "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\nsysfs: check visibility before changing group attribute ownership\n\nSince commit 0c17270f9b92 (\"net: sysfs: Implement is_visible for\nphys_(port_id, port_name, switch_id)\"), __dev_change_net_namespace() can\nhit WARN_ON() when trying to change owner of a file that isn\u0027t visible.\nSee the trace below:\n\n WARNING: CPU: 6 PID: 2938 at net/core/dev.c:12410 __dev_change_net_namespace+0xb89/0xc30\n CPU: 6 UID: 0 PID: 2938 Comm: incusd Not tainted 6.17.1-1-mainline #1 PREEMPT(full)  4b783b4a638669fb644857f484487d17cb45ed1f\n Hardware name: Framework Laptop 13 (AMD Ryzen 7040Series)/FRANMDCP07, BIOS 03.07 02/19/2025\n RIP: 0010:__dev_change_net_namespace+0xb89/0xc30\n [...]\n Call Trace:\n  \u003cTASK\u003e\n  ? if6_seq_show+0x30/0x50\n  do_setlink.isra.0+0xc7/0x1270\n  ? __nla_validate_parse+0x5c/0xcc0\n  ? security_capable+0x94/0x1a0\n  rtnl_newlink+0x858/0xc20\n  ? update_curr+0x8e/0x1c0\n  ? update_entity_lag+0x71/0x80\n  ? sched_balance_newidle+0x358/0x450\n  ? psi_task_switch+0x113/0x2a0\n  ? __pfx_rtnl_newlink+0x10/0x10\n  rtnetlink_rcv_msg+0x346/0x3e0\n  ? sched_clock+0x10/0x30\n  ? __pfx_rtnetlink_rcv_msg+0x10/0x10\n  netlink_rcv_skb+0x59/0x110\n  netlink_unicast+0x285/0x3c0\n  ? __alloc_skb+0xdb/0x1a0\n  netlink_sendmsg+0x20d/0x430\n  ____sys_sendmsg+0x39f/0x3d0\n  ? import_iovec+0x2f/0x40\n  ___sys_sendmsg+0x99/0xe0\n  __sys_sendmsg+0x8a/0xf0\n  do_syscall_64+0x81/0x970\n  ? __sys_bind+0xe3/0x110\n  ? syscall_exit_work+0x143/0x1b0\n  ? do_syscall_64+0x244/0x970\n  ? sock_alloc_file+0x63/0xc0\n  ? syscall_exit_work+0x143/0x1b0\n  ? do_syscall_64+0x244/0x970\n  ? alloc_fd+0x12e/0x190\n  ? put_unused_fd+0x2a/0x70\n  ? do_sys_openat2+0xa2/0xe0\n  ? syscall_exit_work+0x143/0x1b0\n  ? do_syscall_64+0x244/0x970\n  ? exc_page_fault+0x7e/0x1a0\n  entry_SYSCALL_64_after_hwframe+0x76/0x7e\n [...]\n  \u003c/TASK\u003e\n\nFix this by checking is_visible() before trying to touch the attribute."
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2025-12-16T13:30:28.017Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
      "references": [
        {
          "url": "https://git.kernel.org/stable/c/ac2c526e103285d80a0330b91a318f6c9276d35a"
        },
        {
          "url": "https://git.kernel.org/stable/c/c7fbb8218b4ad35fec0bd2256d2b9c8d60331f33"
        }
      ],
      "title": "sysfs: check visibility before changing group attribute ownership",
      "x_generator": {
        "engine": "bippy-1.2.0"
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "cveId": "CVE-2025-40355",
    "datePublished": "2025-12-16T13:30:28.017Z",
    "dateReserved": "2025-04-16T07:20:57.187Z",
    "dateUpdated": "2025-12-16T13:30:28.017Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2",
  "vulnerability-lookup:meta": {
    "nvd": "{\"cve\":{\"id\":\"CVE-2025-40355\",\"sourceIdentifier\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"published\":\"2025-12-16T14:15:47.423\",\"lastModified\":\"2025-12-18T15:08:25.907\",\"vulnStatus\":\"Awaiting Analysis\",\"cveTags\":[],\"descriptions\":[{\"lang\":\"en\",\"value\":\"In the Linux kernel, the following vulnerability has been resolved:\\n\\nsysfs: check visibility before changing group attribute ownership\\n\\nSince commit 0c17270f9b92 (\\\"net: sysfs: Implement is_visible for\\nphys_(port_id, port_name, switch_id)\\\"), __dev_change_net_namespace() can\\nhit WARN_ON() when trying to change owner of a file that isn\u0027t visible.\\nSee the trace below:\\n\\n WARNING: CPU: 6 PID: 2938 at net/core/dev.c:12410 __dev_change_net_namespace+0xb89/0xc30\\n CPU: 6 UID: 0 PID: 2938 Comm: incusd Not tainted 6.17.1-1-mainline #1 PREEMPT(full)  4b783b4a638669fb644857f484487d17cb45ed1f\\n Hardware name: Framework Laptop 13 (AMD Ryzen 7040Series)/FRANMDCP07, BIOS 03.07 02/19/2025\\n RIP: 0010:__dev_change_net_namespace+0xb89/0xc30\\n [...]\\n Call Trace:\\n  \u003cTASK\u003e\\n  ? if6_seq_show+0x30/0x50\\n  do_setlink.isra.0+0xc7/0x1270\\n  ? __nla_validate_parse+0x5c/0xcc0\\n  ? security_capable+0x94/0x1a0\\n  rtnl_newlink+0x858/0xc20\\n  ? update_curr+0x8e/0x1c0\\n  ? update_entity_lag+0x71/0x80\\n  ? sched_balance_newidle+0x358/0x450\\n  ? psi_task_switch+0x113/0x2a0\\n  ? __pfx_rtnl_newlink+0x10/0x10\\n  rtnetlink_rcv_msg+0x346/0x3e0\\n  ? sched_clock+0x10/0x30\\n  ? __pfx_rtnetlink_rcv_msg+0x10/0x10\\n  netlink_rcv_skb+0x59/0x110\\n  netlink_unicast+0x285/0x3c0\\n  ? __alloc_skb+0xdb/0x1a0\\n  netlink_sendmsg+0x20d/0x430\\n  ____sys_sendmsg+0x39f/0x3d0\\n  ? import_iovec+0x2f/0x40\\n  ___sys_sendmsg+0x99/0xe0\\n  __sys_sendmsg+0x8a/0xf0\\n  do_syscall_64+0x81/0x970\\n  ? __sys_bind+0xe3/0x110\\n  ? syscall_exit_work+0x143/0x1b0\\n  ? do_syscall_64+0x244/0x970\\n  ? sock_alloc_file+0x63/0xc0\\n  ? syscall_exit_work+0x143/0x1b0\\n  ? do_syscall_64+0x244/0x970\\n  ? alloc_fd+0x12e/0x190\\n  ? put_unused_fd+0x2a/0x70\\n  ? do_sys_openat2+0xa2/0xe0\\n  ? syscall_exit_work+0x143/0x1b0\\n  ? do_syscall_64+0x244/0x970\\n  ? exc_page_fault+0x7e/0x1a0\\n  entry_SYSCALL_64_after_hwframe+0x76/0x7e\\n [...]\\n  \u003c/TASK\u003e\\n\\nFix this by checking is_visible() before trying to touch the attribute.\"}],\"metrics\":{},\"references\":[{\"url\":\"https://git.kernel.org/stable/c/ac2c526e103285d80a0330b91a318f6c9276d35a\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/c7fbb8218b4ad35fec0bd2256d2b9c8d60331f33\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"}]}}"
  }
}


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  • Confirmed: The vulnerability has been validated from an analyst's perspective.
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