Vulnerability-Lookup

GHSA-936G-6JG3-MGP5

Vulnerability from github – Published: 2024-11-07 12:30 – Updated: 2024-11-22 21:32

Details

In the Linux kernel, the following vulnerability has been resolved:

bpf: Preserve param->string when parsing mount options

In bpf_parse_param(), keep the value of param->string intact so it can be freed later. Otherwise, the kmalloc area pointed to by param->string will be leaked as shown below:

unreferenced object 0xffff888118c46d20 (size 8): comm "new_name", pid 12109, jiffies 4295580214 hex dump (first 8 bytes): 61 6e 79 00 38 c9 5c 7e any.8.\~ backtrace (crc e1b7f876): [<00000000c6848ac7>] kmemleak_alloc+0x4b/0x80 [<00000000de9f7d00>] __kmalloc_node_track_caller_noprof+0x36e/0x4a0 [<000000003e29b886>] memdup_user+0x32/0xa0 [<0000000007248326>] strndup_user+0x46/0x60 [<0000000035b3dd29>] __x64_sys_fsconfig+0x368/0x3d0 [<0000000018657927>] x64_sys_call+0xff/0x9f0 [<00000000c0cabc95>] do_syscall_64+0x3b/0xc0 [<000000002f331597>] entry_SYSCALL_64_after_hwframe+0x4b/0x53

Severity

5.5 (Medium)


                  
                    CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

Show details on source website

JSON

To clipboard

{
  "affected": [],
  "aliases": [
    "CVE-2024-50165"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-401"
    ],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2024-11-07T10:15:07Z",
    "severity": "MODERATE"
  },
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\nbpf: Preserve param-\u003estring when parsing mount options\n\nIn bpf_parse_param(), keep the value of param-\u003estring intact so it can\nbe freed later. Otherwise, the kmalloc area pointed to by param-\u003estring\nwill be leaked as shown below:\n\nunreferenced object 0xffff888118c46d20 (size 8):\n  comm \"new_name\", pid 12109, jiffies 4295580214\n  hex dump (first 8 bytes):\n    61 6e 79 00 38 c9 5c 7e                          any.8.\\~\n  backtrace (crc e1b7f876):\n    [\u003c00000000c6848ac7\u003e] kmemleak_alloc+0x4b/0x80\n    [\u003c00000000de9f7d00\u003e] __kmalloc_node_track_caller_noprof+0x36e/0x4a0\n    [\u003c000000003e29b886\u003e] memdup_user+0x32/0xa0\n    [\u003c0000000007248326\u003e] strndup_user+0x46/0x60\n    [\u003c0000000035b3dd29\u003e] __x64_sys_fsconfig+0x368/0x3d0\n    [\u003c0000000018657927\u003e] x64_sys_call+0xff/0x9f0\n    [\u003c00000000c0cabc95\u003e] do_syscall_64+0x3b/0xc0\n    [\u003c000000002f331597\u003e] entry_SYSCALL_64_after_hwframe+0x4b/0x53",
  "id": "GHSA-936g-6jg3-mgp5",
  "modified": "2024-11-22T21:32:12Z",
  "published": "2024-11-07T12:30:35Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2024-50165"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/1f97c03f43fadc407de5b5cb01c07755053e1c22"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/5d7a0a426540319327309035509cb768a2f5c2c4"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H",
      "type": "CVSS_V3"
    }
  ]
}

CVE-2024-50165 (GCVE-0-2024-50165)

Vulnerability from cvelistv5 – Published: 2024-11-07 09:31 – Updated: 2026-08-05 11:42

Title

bpf: Preserve param->string when parsing mount options

Summary

In the Linux kernel, the following vulnerability has been resolved: bpf: Preserve param->string when parsing mount options In bpf_parse_param(), keep the value of param->string intact so it can be freed later. Otherwise, the kmalloc area pointed to by param->string will be leaked as shown below: unreferenced object 0xffff888118c46d20 (size 8): comm "new_name", pid 12109, jiffies 4295580214 hex dump (first 8 bytes): 61 6e 79 00 38 c9 5c 7e any.8.\~ backtrace (crc e1b7f876): [<00000000c6848ac7>] kmemleak_alloc+0x4b/0x80 [<00000000de9f7d00>] __kmalloc_node_track_caller_noprof+0x36e/0x4a0 [<000000003e29b886>] memdup_user+0x32/0xa0 [<0000000007248326>] strndup_user+0x46/0x60 [<0000000035b3dd29>] __x64_sys_fsconfig+0x368/0x3d0 [<0000000018657927>] x64_sys_call+0xff/0x9f0 [<00000000c0cabc95>] do_syscall_64+0x3b/0xc0 [<000000002f331597>] entry_SYSCALL_64_after_hwframe+0x4b/0x53

Severity

7.8 (High)


                        
                          CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

5.5 (Medium)


                        
                          CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

SSVC

Exploitation: none Automatable: no Technical Impact: partial

CISA Coordinator · CISA-ADP (v2.0.3)

Decision recorded 2025-10-01 20:20 UTC

CWE

CWE-401 - Missing Release of Memory after Effective Lifetime

Assigner

Linux CNA under the mitre root

CNA scorecard D 53/100 over 7056 records in the last 180 days details

References

2 references

URL	Tags
https://git.kernel.org/stable/c/5d7a0a42654031932…
https://git.kernel.org/stable/c/1f97c03f43fadc407…

Impacted products

2 products

Vendor	Product	Version
Linux	Linux	Affected: 6c1752e0b6ca8c7021d6da3926738d8d88f601a9 , < 5d7a0a426540319327309035509cb768a2f5c2c4 (git) Affected: 6c1752e0b6ca8c7021d6da3926738d8d88f601a9 , < 1f97c03f43fadc407de5b5cb01c07755053e1c22 (git)
Linux	Linux	Affected: 6.9 Unaffected: 0 , < 6.9 (semver) Unaffected: 6.11.6 , ≤ 6.11.* (semver) Unaffected: 6.12 , ≤ * (original_commit_for_fix)

Show details on NVD website

JSON

To clipboard

{
  "containers": {
    "adp": [
      {
        "metrics": [
          {
            "cvssV3_1": {
              "attackComplexity": "LOW",
              "attackVector": "LOCAL",
              "availabilityImpact": "HIGH",
              "baseScore": 5.5,
              "baseSeverity": "MEDIUM",
              "confidentialityImpact": "NONE",
              "integrityImpact": "NONE",
              "privilegesRequired": "LOW",
              "scope": "UNCHANGED",
              "userInteraction": "NONE",
              "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H",
              "version": "3.1"
            }
          },
          {
            "other": {
              "content": {
                "id": "CVE-2024-50165",
                "options": [
                  {
                    "Exploitation": "none"
                  },
                  {
                    "Automatable": "no"
                  },
                  {
                    "Technical Impact": "partial"
                  }
                ],
                "role": "CISA Coordinator",
                "timestamp": "2025-10-01T20:20:04.347964Z",
                "version": "2.0.3"
              },
              "type": "ssvc"
            }
          }
        ],
        "problemTypes": [
          {
            "descriptions": [
              {
                "cweId": "CWE-401",
                "description": "CWE-401 Missing Release of Memory after Effective Lifetime",
                "lang": "en",
                "type": "CWE"
              }
            ]
          }
        ],
        "providerMetadata": {
          "dateUpdated": "2025-10-01T20:27:11.791Z",
          "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
          "shortName": "CISA-ADP"
        },
        "title": "CISA ADP Vulnrichment"
      }
    ],
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "kernel/bpf/inode.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "lessThan": "5d7a0a426540319327309035509cb768a2f5c2c4",
              "status": "affected",
              "version": "6c1752e0b6ca8c7021d6da3926738d8d88f601a9",
              "versionType": "git"
            },
            {
              "lessThan": "1f97c03f43fadc407de5b5cb01c07755053e1c22",
              "status": "affected",
              "version": "6c1752e0b6ca8c7021d6da3926738d8d88f601a9",
              "versionType": "git"
            }
          ]
        },
        {
          "defaultStatus": "affected",
          "product": "Linux",
          "programFiles": [
            "kernel/bpf/inode.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "6.9"
            },
            {
              "lessThan": "6.9",
              "status": "unaffected",
              "version": "0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.11.*",
              "status": "unaffected",
              "version": "6.11.6",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "*",
              "status": "unaffected",
              "version": "6.12",
              "versionType": "original_commit_for_fix"
            }
          ]
        }
      ],
      "cpeApplicability": [
        {
          "nodes": [
            {
              "cpeMatch": [
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.11.6",
                  "versionStartIncluding": "6.9",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.12",
                  "versionStartIncluding": "6.9",
                  "vulnerable": true
                }
              ],
              "negate": false,
              "operator": "OR"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nbpf: Preserve param-\u003estring when parsing mount options\n\nIn bpf_parse_param(), keep the value of param-\u003estring intact so it can\nbe freed later. Otherwise, the kmalloc area pointed to by param-\u003estring\nwill be leaked as shown below:\n\nunreferenced object 0xffff888118c46d20 (size 8):\n  comm \"new_name\", pid 12109, jiffies 4295580214\n  hex dump (first 8 bytes):\n    61 6e 79 00 38 c9 5c 7e                          any.8.\\~\n  backtrace (crc e1b7f876):\n    [\u003c00000000c6848ac7\u003e] kmemleak_alloc+0x4b/0x80\n    [\u003c00000000de9f7d00\u003e] __kmalloc_node_track_caller_noprof+0x36e/0x4a0\n    [\u003c000000003e29b886\u003e] memdup_user+0x32/0xa0\n    [\u003c0000000007248326\u003e] strndup_user+0x46/0x60\n    [\u003c0000000035b3dd29\u003e] __x64_sys_fsconfig+0x368/0x3d0\n    [\u003c0000000018657927\u003e] x64_sys_call+0xff/0x9f0\n    [\u003c00000000c0cabc95\u003e] do_syscall_64+0x3b/0xc0\n    [\u003c000000002f331597\u003e] entry_SYSCALL_64_after_hwframe+0x4b/0x53"
        }
      ],
      "metrics": [
        {
          "cvssV3_1": {
            "baseScore": 7.8,
            "baseSeverity": "HIGH",
            "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
            "version": "3.1"
          },
          "scenarios": [
            {
              "lang": "en",
              "value": "AV:L - The bug is reached through the fsopen(2)/fsconfig(2) syscall pair (or mount(2) with monolithic options) against the bpf filesystem, requiring local system access. There is no remote or adjacent-network path to bpffs mount-option parsing.\nAC:L - A single deterministic fsconfig() call with delegate_cmds=\"x:any\" reliably triggers the interior-pointer kfree(), and a trivial loop reliably drives the unbounded leak; no race, timing window, or uncontrollable precondition is involved. CONFIG_BPF_SYSCALL/bpffs is enabled in essentially all distribution kernels.\nPR:L - bpf_fs_type is FS_USERNS_MOUNT and fsopen() only requires ns_capable(mnt_ns-\u003euser_ns, CAP_SYS_ADMIN), so any unprivileged user can reach bpf_parse_param() via unshare -Urm. The CAP_SYS_ADMIN check on delegation options executes only after the buggy strsep loop, so it provides no protection.\nUI:N - The attacker performs the entire sequence \u2014 create a user/mount namespace, fsopen the bpf filesystem, issue fsconfig \u2014 with no action by any other user. No victim must mount anything or open any file.\nS:U - The corruption and resource exhaustion occur in the kernel slab allocator of the same host, within the same security authority. No VM, IOMMU, or hypervisor boundary is crossed.\nC:H - Freeing an interior pointer inserts a misaligned address into the SLUB freelist, so a subsequent allocation returns a chunk overlapping adjacent live objects \u2014 a type-confusion/aliasing primitive that lets the attacker read kernel data belonging to other allocations. Per kernel scoring guidance, slab corruption of this class is treated as a full confidentiality compromise.\nI:H - The same misaligned kfree() causes set_freepointer() to write a heap pointer out of bounds of the freed chunk and hands out overlapping allocations, giving an attacker-usable write primitive over adjacent slab objects. Heap freelist corruption of this kind is the standard basis for privilege escalation.\nA:H - Slab freelist corruption produces kernel panics/oopses (and is caught immediately as an invalid free on KASAN/SLUB_DEBUG builds), and the leak variant lets an unprivileged user drain kernel memory in an unbounded loop until OOM. Either path yields a full denial of service."
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-08-05T11:42:13.725Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
      "references": [
        {
          "url": "https://git.kernel.org/stable/c/5d7a0a426540319327309035509cb768a2f5c2c4"
        },
        {
          "url": "https://git.kernel.org/stable/c/1f97c03f43fadc407de5b5cb01c07755053e1c22"
        }
      ],
      "title": "bpf: Preserve param-\u003estring when parsing mount options",
      "x_generator": {
        "engine": "bippy-1.2.0"
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "cveId": "CVE-2024-50165",
    "datePublished": "2024-11-07T09:31:41.923Z",
    "dateReserved": "2024-10-21T19:36:19.962Z",
    "dateUpdated": "2026-08-05T11:42:13.725Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}

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.

Vulnerability timeline

Sightings and recorded dates, grouped by day · UTC

Order JSON

Publication & reservation Sightings KEV catalogs Other timestamps

Loading timeline…

The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base model, served locally by ML-Gateway. They have not been verified by an analyst and are provided for guidance only.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
Browse all ATT&CK techniques and the vulnerabilities related to each.

Related by attack behaviour

Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.

Action not permitted