ubuntu-cve-2024-26850
Vulnerability from osv_ubuntu
Published
2024-04-17 11:15
Modified
2026-02-06 17:42
Summary
Details

In the Linux kernel, the following vulnerability has been resolved: mm/debug_vm_pgtable: fix BUG_ON with pud advanced test Architectures like powerpc add debug checks to ensure we find only devmap PUD pte entries. These debug checks are only done with CONFIG_DEBUG_VM. This patch marks the ptes used for PUD advanced test devmap pte entries so that we don't hit on debug checks on architecture like ppc64 as below. WARNING: CPU: 2 PID: 1 at arch/powerpc/mm/book3s64/radix_pgtable.c:1382 radix__pud_hugepage_update+0x38/0x138 .... NIP [c0000000000a7004] radix__pud_hugepage_update+0x38/0x138 LR [c0000000000a77a8] radix__pudp_huge_get_and_clear+0x28/0x60 Call Trace: [c000000004a2f950] [c000000004a2f9a0] 0xc000000004a2f9a0 (unreliable) [c000000004a2f980] [000d34c100000000] 0xd34c100000000 [c000000004a2f9a0] [c00000000206ba98] pud_advanced_tests+0x118/0x334 [c000000004a2fa40] [c00000000206db34] debug_vm_pgtable+0xcbc/0x1c48 [c000000004a2fc10] [c00000000000fd28] do_one_initcall+0x60/0x388 Also kernel BUG at arch/powerpc/mm/book3s64/pgtable.c:202! .... NIP [c000000000096510] pudp_huge_get_and_clear_full+0x98/0x174 LR [c00000000206bb34] pud_advanced_tests+0x1b4/0x334 Call Trace: [c000000004a2f950] [000d34c100000000] 0xd34c100000000 (unreliable) [c000000004a2f9a0] [c00000000206bb34] pud_advanced_tests+0x1b4/0x334 [c000000004a2fa40] [c00000000206db34] debug_vm_pgtable+0xcbc/0x1c48 [c000000004a2fc10] [c00000000000fd28] do_one_initcall+0x60/0x388

Severity
5.5 (Medium)
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
N/A (UNKNOWN)
medium
References
To clipboard 

{
  "affected": [
    {
      "ecosystem_specific": {
        "binaries": [
          {
            "binary_name": "linux-buildinfo-5.15.0-1073-intel-iot-realtime",
            "binary_version": "5.15.0-1073.75"
          },
          {
            "binary_name": "linux-cloud-tools-5.15.0-1073-intel-iot-realtime",
            "binary_version": "5.15.0-1073.75"
          },
          {
            "binary_name": "linux-headers-5.15.0-1073-intel-iot-realtime",
            "binary_version": "5.15.0-1073.75"
          },
          {
            "binary_name": "linux-image-unsigned-5.15.0-1073-intel-iot-realtime",
            "binary_version": "5.15.0-1073.75"
          },
          {
            "binary_name": "linux-intel-iot-realtime-cloud-tools-5.15.0-1073",
            "binary_version": "5.15.0-1073.75"
          },
          {
            "binary_name": "linux-intel-iot-realtime-cloud-tools-common",
            "binary_version": "5.15.0-1073.75"
          },
          {
            "binary_name": "linux-intel-iot-realtime-headers-5.15.0-1073",
            "binary_version": "5.15.0-1073.75"
          },
          {
            "binary_name": "linux-intel-iot-realtime-tools-5.15.0-1073",
            "binary_version": "5.15.0-1073.75"
          },
          {
            "binary_name": "linux-intel-iot-realtime-tools-common",
            "binary_version": "5.15.0-1073.75"
          },
          {
            "binary_name": "linux-intel-iot-realtime-tools-host",
            "binary_version": "5.15.0-1073.75"
          },
          {
            "binary_name": "linux-modules-5.15.0-1073-intel-iot-realtime",
            "binary_version": "5.15.0-1073.75"
          },
          {
            "binary_name": "linux-modules-extra-5.15.0-1073-intel-iot-realtime",
            "binary_version": "5.15.0-1073.75"
          },
          {
            "binary_name": "linux-tools-5.15.0-1073-intel-iot-realtime",
            "binary_version": "5.15.0-1073.75"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:22.04:LTS",
        "name": "linux-intel-iot-realtime",
        "purl": "pkg:deb/ubuntu/linux-intel-iot-realtime@5.15.0-1073.75?arch=source\u0026distro=jammy"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "5.15.0-1073.75"
      ]
    },
    {
      "ecosystem_specific": {
        "binaries": [
          {
            "binary_name": "linux-buildinfo-5.15.0-1032-realtime",
            "binary_version": "5.15.0-1032.35"
          },
          {
            "binary_name": "linux-cloud-tools-5.15.0-1032-realtime",
            "binary_version": "5.15.0-1032.35"
          },
          {
            "binary_name": "linux-headers-5.15.0-1032-realtime",
            "binary_version": "5.15.0-1032.35"
          },
          {
            "binary_name": "linux-image-unsigned-5.15.0-1032-realtime",
            "binary_version": "5.15.0-1032.35"
          },
          {
            "binary_name": "linux-modules-5.15.0-1032-realtime",
            "binary_version": "5.15.0-1032.35"
          },
          {
            "binary_name": "linux-modules-extra-5.15.0-1032-realtime",
            "binary_version": "5.15.0-1032.35"
          },
          {
            "binary_name": "linux-realtime-cloud-tools-5.15.0-1032",
            "binary_version": "5.15.0-1032.35"
          },
          {
            "binary_name": "linux-realtime-cloud-tools-common",
            "binary_version": "5.15.0-1032.35"
          },
          {
            "binary_name": "linux-realtime-headers-5.15.0-1032",
            "binary_version": "5.15.0-1032.35"
          },
          {
            "binary_name": "linux-realtime-tools-5.15.0-1032",
            "binary_version": "5.15.0-1032.35"
          },
          {
            "binary_name": "linux-realtime-tools-common",
            "binary_version": "5.15.0-1032.35"
          },
          {
            "binary_name": "linux-realtime-tools-host",
            "binary_version": "5.15.0-1032.35"
          },
          {
            "binary_name": "linux-tools-5.15.0-1032-realtime",
            "binary_version": "5.15.0-1032.35"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:22.04:LTS",
        "name": "linux-realtime",
        "purl": "pkg:deb/ubuntu/linux-realtime@5.15.0-1032.35?arch=source\u0026distro=jammy"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "5.15.0-1032.35"
      ]
    },
    {
      "ecosystem_specific": {
        "availability": "Available with Ubuntu Pro: https://ubuntu.com/pro",
        "binaries": [
          {
            "binary_name": "linux-buildinfo-6.8.0-2002-raspi-realtime",
            "binary_version": "6.8.0-2002.2"
          },
          {
            "binary_name": "linux-headers-6.8.0-2002-raspi-realtime",
            "binary_version": "6.8.0-2002.2"
          },
          {
            "binary_name": "linux-image-6.8.0-2002-raspi-realtime",
            "binary_version": "6.8.0-2002.2"
          },
          {
            "binary_name": "linux-modules-6.8.0-2002-raspi-realtime",
            "binary_version": "6.8.0-2002.2"
          },
          {
            "binary_name": "linux-raspi-realtime-headers-6.8.0-2002",
            "binary_version": "6.8.0-2002.2"
          },
          {
            "binary_name": "linux-raspi-realtime-tools-6.8.0-2002",
            "binary_version": "6.8.0-2002.2"
          },
          {
            "binary_name": "linux-tools-6.8.0-2002-raspi-realtime",
            "binary_version": "6.8.0-2002.2"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:Pro:Realtime:24.04:LTS",
        "name": "linux-raspi-realtime",
        "purl": "pkg:deb/ubuntu/linux-raspi-realtime@6.8.0-2002.2?arch=source\u0026distro=realtime/noble"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "6.8.0-2002.2"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "6.7.0-2001.1",
        "6.8.0-2001.1"
      ]
    }
  ],
  "aliases": [],
  "details": "In the Linux kernel, the following vulnerability has been resolved: mm/debug_vm_pgtable: fix BUG_ON with pud advanced test Architectures like powerpc add debug checks to ensure we find only devmap PUD pte entries.  These debug checks are only done with CONFIG_DEBUG_VM. This patch marks the ptes used for PUD advanced test devmap pte entries so that we don\u0027t hit on debug checks on architecture like ppc64 as below. WARNING: CPU: 2 PID: 1 at arch/powerpc/mm/book3s64/radix_pgtable.c:1382 radix__pud_hugepage_update+0x38/0x138 .... NIP [c0000000000a7004] radix__pud_hugepage_update+0x38/0x138 LR [c0000000000a77a8] radix__pudp_huge_get_and_clear+0x28/0x60 Call Trace: [c000000004a2f950] [c000000004a2f9a0] 0xc000000004a2f9a0 (unreliable) [c000000004a2f980] [000d34c100000000] 0xd34c100000000 [c000000004a2f9a0] [c00000000206ba98] pud_advanced_tests+0x118/0x334 [c000000004a2fa40] [c00000000206db34] debug_vm_pgtable+0xcbc/0x1c48 [c000000004a2fc10] [c00000000000fd28] do_one_initcall+0x60/0x388 Also  kernel BUG at arch/powerpc/mm/book3s64/pgtable.c:202!  ....  NIP [c000000000096510] pudp_huge_get_and_clear_full+0x98/0x174  LR [c00000000206bb34] pud_advanced_tests+0x1b4/0x334  Call Trace:  [c000000004a2f950] [000d34c100000000] 0xd34c100000000 (unreliable)  [c000000004a2f9a0] [c00000000206bb34] pud_advanced_tests+0x1b4/0x334  [c000000004a2fa40] [c00000000206db34] debug_vm_pgtable+0xcbc/0x1c48  [c000000004a2fc10] [c00000000000fd28] do_one_initcall+0x60/0x388",
  "id": "UBUNTU-CVE-2024-26850",
  "modified": "2026-02-06T17:42:22Z",
  "published": "2024-04-17T11:15:00Z",
  "references": [
    {
      "type": "REPORT",
      "url": "https://ubuntu.com/security/CVE-2024-26850"
    },
    {
      "type": "REPORT",
      "url": "https://www.cve.org/CVERecord?id=CVE-2024-26850"
    },
    {
      "type": "REPORT",
      "url": "https://git.kernel.org/linus/720da1e593b85a550593b415bf1d79a053133451"
    },
    {
      "type": "REPORT",
      "url": "https://git.kernel.org/stable/c/d2a9510c0e39d06f5544075c13040407bdbf2803"
    },
    {
      "type": "REPORT",
      "url": "https://git.kernel.org/stable/c/eeeddf85fc58d48c58ad916e4ca12363ebd8ab21"
    },
    {
      "type": "REPORT",
      "url": "https://git.kernel.org/stable/c/720da1e593b85a550593b415bf1d79a053133451"
    }
  ],
  "related": [],
  "schema_version": "1.7.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H",
      "type": "CVSS_V3"
    },
    {
      "score": "medium",
      "type": "Ubuntu"
    }
  ],
  "upstream": [
    "CVE-2024-26850"
  ]
}



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Nomenclature

  • Seen: The vulnerability was mentioned, discussed, or observed by the user.
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