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OESA-2025-1962 (CVE-2025-38424)

Vulnerability from osv_openeuler – Published: 2025-08-08 11:09 – Updated: 2026-08-06 11:09 – Source website
VLAI
Summary
kernel security update
Details

The Linux Kernel, the operating system core itself.

Security Fix(es):

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

perf: Fix sample vs do_exit()

Baisheng Gao reported an ARM64 crash, which Mark decoded as being a synchronous external abort -- most likely due to trying to access MMIO in bad ways.

The crash further shows perf trying to do a user stack sample while in exit_mmap()'s tlb_finish_mmu() -- i.e. while tearing down the address space it is trying to access.

It turns out that we stop perf after we tear down the userspace mm; a receipie for disaster, since perf likes to access userspace for various reasons.

Flip this order by moving up where we stop perf in do_exit().

Additionally, harden PERF_SAMPLE_CALLCHAIN and PERF_SAMPLE_STACK_USER to abort when the current task does not have an mm (exit_mm() makes sure to set current->mm = NULL; before commencing with the actual teardown). Such that CPU wide events don't trip on this same problem.(CVE-2025-38424)


{
  "affected": [
    {
      "ecosystem_specific": {
        "aarch64": [
          "bpftool-4.19.90-2507.5.0.0338.oe2003sp4.aarch64.rpm",
          "bpftool-debuginfo-4.19.90-2507.5.0.0338.oe2003sp4.aarch64.rpm",
          "kernel-4.19.90-2507.5.0.0338.oe2003sp4.aarch64.rpm",
          "kernel-debuginfo-4.19.90-2507.5.0.0338.oe2003sp4.aarch64.rpm",
          "kernel-debugsource-4.19.90-2507.5.0.0338.oe2003sp4.aarch64.rpm",
          "kernel-devel-4.19.90-2507.5.0.0338.oe2003sp4.aarch64.rpm",
          "kernel-source-4.19.90-2507.5.0.0338.oe2003sp4.aarch64.rpm",
          "kernel-tools-4.19.90-2507.5.0.0338.oe2003sp4.aarch64.rpm",
          "kernel-tools-debuginfo-4.19.90-2507.5.0.0338.oe2003sp4.aarch64.rpm",
          "kernel-tools-devel-4.19.90-2507.5.0.0338.oe2003sp4.aarch64.rpm",
          "perf-4.19.90-2507.5.0.0338.oe2003sp4.aarch64.rpm",
          "perf-debuginfo-4.19.90-2507.5.0.0338.oe2003sp4.aarch64.rpm",
          "python2-perf-4.19.90-2507.5.0.0338.oe2003sp4.aarch64.rpm",
          "python2-perf-debuginfo-4.19.90-2507.5.0.0338.oe2003sp4.aarch64.rpm",
          "python3-perf-4.19.90-2507.5.0.0338.oe2003sp4.aarch64.rpm",
          "python3-perf-debuginfo-4.19.90-2507.5.0.0338.oe2003sp4.aarch64.rpm"
        ],
        "src": [
          "kernel-4.19.90-2507.5.0.0338.oe2003sp4.src.rpm"
        ],
        "x86_64": [
          "bpftool-4.19.90-2507.5.0.0338.oe2003sp4.x86_64.rpm",
          "bpftool-debuginfo-4.19.90-2507.5.0.0338.oe2003sp4.x86_64.rpm",
          "kernel-4.19.90-2507.5.0.0338.oe2003sp4.x86_64.rpm",
          "kernel-debuginfo-4.19.90-2507.5.0.0338.oe2003sp4.x86_64.rpm",
          "kernel-debugsource-4.19.90-2507.5.0.0338.oe2003sp4.x86_64.rpm",
          "kernel-devel-4.19.90-2507.5.0.0338.oe2003sp4.x86_64.rpm",
          "kernel-source-4.19.90-2507.5.0.0338.oe2003sp4.x86_64.rpm",
          "kernel-tools-4.19.90-2507.5.0.0338.oe2003sp4.x86_64.rpm",
          "kernel-tools-debuginfo-4.19.90-2507.5.0.0338.oe2003sp4.x86_64.rpm",
          "kernel-tools-devel-4.19.90-2507.5.0.0338.oe2003sp4.x86_64.rpm",
          "perf-4.19.90-2507.5.0.0338.oe2003sp4.x86_64.rpm",
          "perf-debuginfo-4.19.90-2507.5.0.0338.oe2003sp4.x86_64.rpm",
          "python2-perf-4.19.90-2507.5.0.0338.oe2003sp4.x86_64.rpm",
          "python2-perf-debuginfo-4.19.90-2507.5.0.0338.oe2003sp4.x86_64.rpm",
          "python3-perf-4.19.90-2507.5.0.0338.oe2003sp4.x86_64.rpm",
          "python3-perf-debuginfo-4.19.90-2507.5.0.0338.oe2003sp4.x86_64.rpm"
        ]
      },
      "package": {
        "ecosystem": "openEuler:20.03-LTS-SP4",
        "name": "kernel",
        "purl": "pkg:rpm/openEuler/kernel\u0026distro=openEuler-20.03-LTS-SP4"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "4.19.90-2507.5.0.0338.oe2003sp4"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "database_specific": {
    "severity": "High"
  },
  "details": "The Linux Kernel, the operating system core itself.\r\n\r\nSecurity Fix(es):\n\nIn the Linux kernel, the following vulnerability has been resolved:\n\nperf: Fix sample vs do_exit()\n\nBaisheng Gao reported an ARM64 crash, which Mark decoded as being a\nsynchronous external abort -- most likely due to trying to access\nMMIO in bad ways.\n\nThe crash further shows perf trying to do a user stack sample while in\nexit_mmap()\u0026apos;s tlb_finish_mmu() -- i.e. while tearing down the address\nspace it is trying to access.\n\nIt turns out that we stop perf after we tear down the userspace mm; a\nreceipie for disaster, since perf likes to access userspace for\nvarious reasons.\n\nFlip this order by moving up where we stop perf in do_exit().\n\nAdditionally, harden PERF_SAMPLE_CALLCHAIN and PERF_SAMPLE_STACK_USER\nto abort when the current task does not have an mm (exit_mm() makes\nsure to set current-\u0026gt;mm = NULL; before commencing with the actual\nteardown). Such that CPU wide events don\u0026apos;t trip on this same problem.(CVE-2025-38424)",
  "id": "OESA-2025-1962",
  "modified": "2026-08-06T11:09:02Z",
  "published": "2025-08-08T11:09:02Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://www.openeuler.org/zh/security/security-bulletins/detail/?id=openEuler-SA-2025-1962"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2025-38424"
    }
  ],
  "schema_version": "1.7.2",
  "severity": [
    {
      "score": "CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H",
      "type": "CVSS_V3"
    }
  ],
  "summary": "kernel security update",
  "upstream": [
    "CVE-2025-38424"
  ]
}



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