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CVE-2025-38337 (GCVE-0-2025-38337)

Vulnerability from cvelistv5 – Published: 2025-07-10 08:15 – Updated: 2026-05-11 21:26
VLAI
Title
jbd2: fix data-race and null-ptr-deref in jbd2_journal_dirty_metadata()
Summary
In the Linux kernel, the following vulnerability has been resolved: jbd2: fix data-race and null-ptr-deref in jbd2_journal_dirty_metadata() Since handle->h_transaction may be a NULL pointer, so we should change it to call is_handle_aborted(handle) first before dereferencing it. And the following data-race was reported in my fuzzer: ================================================================== BUG: KCSAN: data-race in jbd2_journal_dirty_metadata / jbd2_journal_dirty_metadata write to 0xffff888011024104 of 4 bytes by task 10881 on cpu 1: jbd2_journal_dirty_metadata+0x2a5/0x770 fs/jbd2/transaction.c:1556 __ext4_handle_dirty_metadata+0xe7/0x4b0 fs/ext4/ext4_jbd2.c:358 ext4_do_update_inode fs/ext4/inode.c:5220 [inline] ext4_mark_iloc_dirty+0x32c/0xd50 fs/ext4/inode.c:5869 __ext4_mark_inode_dirty+0xe1/0x450 fs/ext4/inode.c:6074 ext4_dirty_inode+0x98/0xc0 fs/ext4/inode.c:6103 .... read to 0xffff888011024104 of 4 bytes by task 10880 on cpu 0: jbd2_journal_dirty_metadata+0xf2/0x770 fs/jbd2/transaction.c:1512 __ext4_handle_dirty_metadata+0xe7/0x4b0 fs/ext4/ext4_jbd2.c:358 ext4_do_update_inode fs/ext4/inode.c:5220 [inline] ext4_mark_iloc_dirty+0x32c/0xd50 fs/ext4/inode.c:5869 __ext4_mark_inode_dirty+0xe1/0x450 fs/ext4/inode.c:6074 ext4_dirty_inode+0x98/0xc0 fs/ext4/inode.c:6103 .... value changed: 0x00000000 -> 0x00000001 ================================================================== This issue is caused by missing data-race annotation for jh->b_modified. Therefore, the missing annotation needs to be added.
Severity
5.5 (Medium)
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Assigner
References
Impacted products
Vendor Product Version CPE status
Linux Linux Affected: 6e06ae88edae77379bef7c0cb7d3c2dd88676867 , < 5c1a34ff5b0bfdfd2f9343aa9b08d25df618bac5 (git)
Affected: 6e06ae88edae77379bef7c0cb7d3c2dd88676867 , < ec669e5bf409f16e464bfad75f0ba039a45de29a (git)
Affected: 6e06ae88edae77379bef7c0cb7d3c2dd88676867 , < 43d5e3bb5f1dcd91e30238ea0b59a5f77063f84e (git)
Affected: 6e06ae88edae77379bef7c0cb7d3c2dd88676867 , < 23361b479f2700c00960d3ae9cdc8ededa762d47 (git)
Affected: 6e06ae88edae77379bef7c0cb7d3c2dd88676867 , < 2e7c64d7a92c031d016f11c8e8cb05131ab7b75a (git)
Affected: 6e06ae88edae77379bef7c0cb7d3c2dd88676867 , < f78b38af3540b4875147b7b884ee11a27b3dbf4c (git)
Affected: 6e06ae88edae77379bef7c0cb7d3c2dd88676867 , < a377996d714afb8d4d5f4906336f78510039da29 (git)
Affected: 6e06ae88edae77379bef7c0cb7d3c2dd88676867 , < af98b0157adf6504fade79b3e6cb260c4ff68e37 (git)
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Linux Linux Affected: 4.3
Unaffected: 0 , < 4.3 (semver)
Unaffected: 5.4.295 , ≤ 5.4.* (semver)
Unaffected: 5.10.239 , ≤ 5.10.* (semver)
Unaffected: 5.15.186 , ≤ 5.15.* (semver)
Unaffected: 6.1.142 , ≤ 6.1.* (semver)
Unaffected: 6.6.95 , ≤ 6.6.* (semver)
Unaffected: 6.12.35 , ≤ 6.12.* (semver)
Unaffected: 6.15.4 , ≤ 6.15.* (semver)
Unaffected: 6.16 , ≤ * (original_commit_for_fix)
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Dado que handle-\u0026gt;h_transaction puede ser un puntero nulo, debemos modificarlo para que llame primero a is_handle_aborted(handle) antes de desreferenciarlo. La siguiente vulnerabilidad data-race se report\u00f3 en mi fuzzer: ======================================================================== BUG: KCSAN: data-race in jbd2_journal_dirty_metadata / jbd2_journal_dirty_metadata write to 0xffff888011024104 of 4 bytes by task 10881 on cpu 1: jbd2_journal_dirty_metadata+0x2a5/0x770 fs/jbd2/transaction.c:1556 __ext4_handle_dirty_metadata+0xe7/0x4b0 fs/ext4/ext4_jbd2.c:358 ext4_do_update_inode fs/ext4/inode.c:5220 [inline] ext4_mark_iloc_dirty+0x32c/0xd50 fs/ext4/inode.c:5869 __ext4_mark_inode_dirty+0xe1/0x450 fs/ext4/inode.c:6074 ext4_dirty_inode+0x98/0xc0 fs/ext4/inode.c:6103 .... read to 0xffff888011024104 of 4 bytes by task 10880 on cpu 0: jbd2_journal_dirty_metadata+0xf2/0x770 fs/jbd2/transaction.c:1512 __ext4_handle_dirty_metadata+0xe7/0x4b0 fs/ext4/ext4_jbd2.c:358 ext4_do_update_inode fs/ext4/inode.c:5220 [inline] ext4_mark_iloc_dirty+0x32c/0xd50 fs/ext4/inode.c:5869 __ext4_mark_inode_dirty+0xe1/0x450 fs/ext4/inode.c:6074 ext4_dirty_inode+0x98/0xc0 fs/ext4/inode.c:6103 .... value changed: 0x00000000 -\u0026gt; 0x00000001 ======================================================================== Este problema se debe a la falta de la anotaci\u00f3n de carrera de datos para jh-\u0026gt;b_modified. Por lo tanto, es necesario agregarla.\"}],\"affected\":[{\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"affectedData\":[{\"vendor\":\"Linux\",\"product\":\"Linux\",\"defaultStatus\":\"unaffected\",\"programFiles\":[\"fs/jbd2/transaction.c\"],\"repo\":\"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\",\"versions\":[{\"version\":\"6e06ae88edae77379bef7c0cb7d3c2dd88676867\",\"lessThan\":\"5c1a34ff5b0bfdfd2f9343aa9b08d25df618bac5\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"6e06ae88edae77379bef7c0cb7d3c2dd88676867\",\"lessThan\":\"ec669e5bf409f16e464bfad75f0ba039a45de29a\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"6e06ae88edae77379bef7c0cb7d3c2dd88676867\",\"lessThan\":\"43d5e3bb5f1dcd91e30238ea0b59a5f77063f84e\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"6e06ae88edae77379bef7c0cb7d3c2dd88676867\",\"lessThan\":\"23361b479f2700c00960d3ae9cdc8ededa762d47\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"6e06ae88edae77379bef7c0cb7d3c2dd88676867\",\"lessThan\":\"2e7c64d7a92c031d016f11c8e8cb05131ab7b75a\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"6e06ae88edae77379bef7c0cb7d3c2dd88676867\",\"lessThan\":\"f78b38af3540b4875147b7b884ee11a27b3dbf4c\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"6e06ae88edae77379bef7c0cb7d3c2dd88676867\",\"lessThan\":\"a377996d714afb8d4d5f4906336f78510039da29\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"6e06ae88edae77379bef7c0cb7d3c2dd88676867\",\"lessThan\":\"af98b0157adf6504fade79b3e6cb260c4ff68e37\",\"versionType\":\"git\",\"status\":\"affected\"}]},{\"vendor\":\"Linux\",\"product\":\"Linux\",\"defaultStatus\":\"affected\",\"programFiles\":[\"fs/jbd2/transaction.c\"],\"repo\":\"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\",\"versions\":[{\"version\":\"4.3\",\"status\":\"affected\"},{\"version\":\"0\",\"lessThan\":\"4.3\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"5.4.295\",\"lessThanOrEqual\":\"5.4.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"5.10.239\",\"lessThanOrEqual\":\"5.10.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"5.15.186\",\"lessThanOrEqual\":\"5.15.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"6.1.142\",\"lessThanOrEqual\":\"6.1.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"6.6.95\",\"lessThanOrEqual\":\"6.6.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"6.12.35\",\"lessThanOrEqual\":\"6.12.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"6.15.4\",\"lessThanOrEqual\":\"6.15.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"6.16\",\"lessThanOrEqual\":\"*\",\"versionType\":\"original_commit_for_fix\",\"status\":\"unaffected\"}]}]}],\"metrics\":{\"cvssMetricV31\":[{\"source\":\"nvd@nist.gov\",\"type\":\"Primary\",\"cvssData\":{\"version\":\"3.1\",\"vectorString\":\"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H\",\"baseScore\":5.5,\"baseSeverity\":\"MEDIUM\",\"attackVector\":\"LOCAL\",\"attackComplexity\":\"LOW\",\"privilegesRequired\":\"LOW\",\"userInteraction\":\"NONE\",\"scope\":\"UNCHANGED\",\"confidentialityImpact\":\"NONE\",\"integrityImpact\":\"NONE\",\"availabilityImpact\":\"HIGH\"},\"exploitabilityScore\":1.8,\"impactScore\":3.6}]},\"weaknesses\":[{\"source\":\"nvd@nist.gov\",\"type\":\"Primary\",\"description\":[{\"lang\":\"en\",\"value\":\"CWE-476\"}]}],\"configurations\":[{\"nodes\":[{\"operator\":\"OR\",\"negate\":false,\"cpeMatch\":[{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"4.3\",\"versionEndExcluding\":\"5.4.295\",\"matchCriteriaId\":\"3437BBF7-43A1-4283-B6BA-385FA138FAD4\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"5.5\",\"versionEndExcluding\":\"5.10.239\",\"matchCriteriaId\":\"C3D14F4C-A21E-465D-A928-5CCE684E2B98\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"5.11\",\"versionEndExcluding\":\"5.15.186\",\"matchCriteriaId\":\"D96F2C0D-0D4A-4658-AD34-D8A626EA422D\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"5.16\",\"versionEndExcluding\":\"6.1.142\",\"matchCriteriaId\":\"459B4E94-FE0E-434D-B782-95E3A5FFC6B1\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"6.2\",\"versionEndExcluding\":\"6.6.95\",\"matchCriteriaId\":\"C5E01853-7048-4D78-9479-9AEE41AC8456\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"6.7\",\"versionEndExcluding\":\"6.12.35\",\"matchCriteriaId\":\"E569FD34-0076-4428-BE17-EECCF867611C\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\",\"versionStartInclu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Party Advisory\"]},{\"url\":\"https://lists.debian.org/debian-lts-announce/2025/10/msg00008.html\",\"source\":\"af854a3a-2127-422b-91ae-364da2661108\",\"tags\":[\"Third Party Advisory\"]}]}}",
    "redhat_vex": {
      "aggregate_severity": "Moderate",
      "current_release_date": "2026-06-30T01:04:22+00:00",
      "cve": "CVE-2025-38337",
      "id": "CVE-2025-38337",
      "initial_release_date": "2025-07-10T00:00:00+00:00",
      "product_status:known_affected": "246",
      "product_status:known_not_affected": "28",
      "source": "Red Hat CSAF VEX",
      "status": "final",
      "title": "kernel: jbd2: fix data-race and null-ptr-deref in jbd2_journal_dirty_metadata()",
      "url": "https://security.access.redhat.com/data/csaf/v2/vex/2025/cve-2025-38337.json",
      "version": "3"
    },
    "suse_vex": {
      "aggregate_severity": "moderate",
      "current_release_date": "2026-09-11T02:01:16Z",
      "cve": "CVE-2025-38337",
      "id": "CVE-2025-38337",
      "initial_release_date": "2025-07-10T23:22:16Z",
      "product_status:first_fixed": "2",
      "product_status:known_affected": "785",
      "product_status:known_not_affected": "6",
      "product_status:recommended": "509",
      "source": "SUSE CSAF VEX",
      "status": "interim",
      "title": "SUSE CVE CVE-2025-38337",
      "url": "https://ftp.suse.com/pub/projects/security/csaf-vex/cve-2025-38337.json",
      "version": "56"
    }
  }
}



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Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.

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  • 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.
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Detection rules are retrieved from Rulezet.


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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.