CVE-2025-38383 (GCVE-0-2025-38383)

Vulnerability from cvelistv5 – Published: 2025-07-25 12:53 – Updated: 2026-05-11 21:26
VLAI
Title
mm/vmalloc: fix data race in show_numa_info()
Summary
In the Linux kernel, the following vulnerability has been resolved: mm/vmalloc: fix data race in show_numa_info() The following data-race was found in show_numa_info(): ================================================================== BUG: KCSAN: data-race in vmalloc_info_show / vmalloc_info_show read to 0xffff88800971fe30 of 4 bytes by task 8289 on cpu 0: show_numa_info mm/vmalloc.c:4936 [inline] vmalloc_info_show+0x5a8/0x7e0 mm/vmalloc.c:5016 seq_read_iter+0x373/0xb40 fs/seq_file.c:230 proc_reg_read_iter+0x11e/0x170 fs/proc/inode.c:299 .... write to 0xffff88800971fe30 of 4 bytes by task 8287 on cpu 1: show_numa_info mm/vmalloc.c:4934 [inline] vmalloc_info_show+0x38f/0x7e0 mm/vmalloc.c:5016 seq_read_iter+0x373/0xb40 fs/seq_file.c:230 proc_reg_read_iter+0x11e/0x170 fs/proc/inode.c:299 .... value changed: 0x0000008f -> 0x00000000 ================================================================== According to this report,there is a read/write data-race because m->private is accessible to multiple CPUs. To fix this, instead of allocating the heap in proc_vmalloc_init() and passing the heap address to m->private, vmalloc_info_show() should allocate the heap.
Severity
4.7 (Medium)
CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:H
Assigner
Linux CNA under the mitre root
CNA scorecard D 53/100 over 7067 records in the last 180 days details
References
Impacted products
Vendor Product Version CPE status
Linux Linux Affected: 8e1d743f2c2671aa54f6f91a2b33823f92512870 , < ead91de35d9cd5c4f80ec51e6020f342079170af (git)
Affected: 8e1d743f2c2671aa54f6f91a2b33823f92512870 , < 5c966f447a584ece3c70395898231aeb56256ee7 (git)
Affected: 8e1d743f2c2671aa54f6f91a2b33823f92512870 , < 5c5f0468d172ddec2e333d738d2a1f85402cf0bc (git)
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Linux Linux Affected: 6.9
Unaffected: 0 , < 6.9 (semver)
Unaffected: 6.12.37 , ≤ 6.12.* (semver)
Unaffected: 6.15.6 , ≤ 6.15.* (semver)
Unaffected: 6.16 , ≤ * (original_commit_for_fix)
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            "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nmm/vmalloc: fix data race in show_numa_info()\n\nThe following data-race was found in show_numa_info():\n\n==================================================================\nBUG: KCSAN: data-race in vmalloc_info_show / vmalloc_info_show\n\nread to 0xffff88800971fe30 of 4 bytes by task 8289 on cpu 0:\n show_numa_info mm/vmalloc.c:4936 [inline]\n vmalloc_info_show+0x5a8/0x7e0 mm/vmalloc.c:5016\n seq_read_iter+0x373/0xb40 fs/seq_file.c:230\n proc_reg_read_iter+0x11e/0x170 fs/proc/inode.c:299\n....\n\nwrite to 0xffff88800971fe30 of 4 bytes by task 8287 on cpu 1:\n show_numa_info mm/vmalloc.c:4934 [inline]\n vmalloc_info_show+0x38f/0x7e0 mm/vmalloc.c:5016\n seq_read_iter+0x373/0xb40 fs/seq_file.c:230\n proc_reg_read_iter+0x11e/0x170 fs/proc/inode.c:299\n....\n\nvalue changed: 0x0000008f -\u003e 0x00000000\n==================================================================\n\nAccording to this report,there is a read/write data-race because\nm-\u003eprivate is accessible to multiple CPUs.  To fix this, instead of\nallocating the heap in proc_vmalloc_init() and passing the heap address to\nm-\u003eprivate, vmalloc_info_show() should allocate the heap."
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        "lastModified": "2026-06-17T09:16:44.817",
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                "confidentialityImpact": "NONE",
                "integrityImpact": "NONE",
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                "userInteraction": "NONE",
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        "published": "2025-07-25T13:15:27.520",
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      "current_release_date": "2026-06-30T01:05:07+00:00",
      "cve": "CVE-2025-38383",
      "id": "CVE-2025-38383",
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      "product_status:fixed": "616",
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      "source": "Red Hat CSAF VEX",
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      "title": "kernel: Linux kernel: Denial of Service due to data race in vmalloc\u0027s show_numa_info function",
      "url": "https://security.access.redhat.com/data/csaf/v2/vex/2025/cve-2025-38383.json",
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}



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