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CVE-2023-54069 (GCVE-0-2023-54069)

Vulnerability from cvelistv5 – Published: 2025-12-24 12:23 – Updated: 2026-05-23 15:32
VLAI
Title
ext4: fix BUG in ext4_mb_new_inode_pa() due to overflow
Summary
In the Linux kernel, the following vulnerability has been resolved: ext4: fix BUG in ext4_mb_new_inode_pa() due to overflow When we calculate the end position of ext4_free_extent, this position may be exactly where ext4_lblk_t (i.e. uint) overflows. For example, if ac_g_ex.fe_logical is 4294965248 and ac_orig_goal_len is 2048, then the computed end is 0x100000000, which is 0. If ac->ac_o_ex.fe_logical is not the first case of adjusting the best extent, that is, new_bex_end > 0, the following BUG_ON will be triggered: ========================================================= kernel BUG at fs/ext4/mballoc.c:5116! invalid opcode: 0000 [#1] PREEMPT SMP PTI CPU: 3 PID: 673 Comm: xfs_io Tainted: G E 6.5.0-rc1+ #279 RIP: 0010:ext4_mb_new_inode_pa+0xc5/0x430 Call Trace: <TASK> ext4_mb_use_best_found+0x203/0x2f0 ext4_mb_try_best_found+0x163/0x240 ext4_mb_regular_allocator+0x158/0x1550 ext4_mb_new_blocks+0x86a/0xe10 ext4_ext_map_blocks+0xb0c/0x13a0 ext4_map_blocks+0x2cd/0x8f0 ext4_iomap_begin+0x27b/0x400 iomap_iter+0x222/0x3d0 __iomap_dio_rw+0x243/0xcb0 iomap_dio_rw+0x16/0x80 ========================================================= A simple reproducer demonstrating the problem: mkfs.ext4 -F /dev/sda -b 4096 100M mount /dev/sda /tmp/test fallocate -l1M /tmp/test/tmp fallocate -l10M /tmp/test/file fallocate -i -o 1M -l16777203M /tmp/test/file fsstress -d /tmp/test -l 0 -n 100000 -p 8 & sleep 10 && killall -9 fsstress rm -f /tmp/test/tmp xfs_io -c "open -ad /tmp/test/file" -c "pwrite -S 0xff 0 8192" We simply refactor the logic for adjusting the best extent by adding a temporary ext4_free_extent ex and use extent_logical_end() to avoid overflow, which also simplifies the code.
Severity
No CVSS data available.
Assigner
References
Impacted products
Vendor Product Version CPE status
Linux Linux Affected: 8659c5f4ffaacbe932849b98462c3d635b4eacea , < 83ecffd40c65844a73c2e93d7c841455786605ac (git)
Affected: fc7237e191b99f88e859316fab2b06c2c26c8344 , < 58fe961c606c446f5612f6897827b1cac42c2e89 (git)
Affected: 613f6cde5ebb005a37fda117cdda7b4126170c13 , < f2c3a3aa6f11ad9878dbc3a067b0633e07b586c1 (git)
Affected: 9d4430b7f862ce8835ca4e054b6916d15c8e0862 , < fcefddf3a151b2c416b20120c06bb1ba9ad676fb (git)
Affected: 93cdf49f6eca5e23f6546b8f28457b2e6a6961d9 , < b7e9ec38b6a0beb5a49cd1e76be0a9a07c218e90 (git)
Affected: 93cdf49f6eca5e23f6546b8f28457b2e6a6961d9 , < bc056e7163ac7db945366de219745cf94f32a3e6 (git)
Affected: 46772ab99409cc72241227dd8f5295f358233fda (git)
Affected: 25a60b4533268477920faaeebd99e7e69c0735cd (git)
Affected: cec4ef62b36b04e0bc8905732adab091f4bc1cfd (git)
Affected: 5.4.244 , < 5.4.260 (semver)
Affected: 5.10.181 , < 5.10.200 (semver)
Affected: 5.15.113 , < 5.15.138 (semver)
Affected: 6.1.30 , < 6.1.61 (semver)
Affected: 4.14.316 , < 4.15 (semver)
Affected: 4.19.284 , < 4.20 (semver)
Affected: 6.3.4 , < 6.4 (semver)
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Linux Linux Affected: 6.4
Unaffected: 0 , < 6.4 (semver)
Unaffected: 5.4.260 , ≤ 5.4.* (semver)
Unaffected: 5.10.200 , ≤ 5.10.* (semver)
Unaffected: 5.15.138 , ≤ 5.15.* (semver)
Unaffected: 6.1.61 , ≤ 6.1.* (semver)
Unaffected: 6.5.5 , ≤ 6.5.* (semver)
Unaffected: 6.6 , ≤ * (original_commit_for_fix)
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          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\next4: fix BUG in ext4_mb_new_inode_pa() due to overflow\n\nWhen we calculate the end position of ext4_free_extent, this position may\nbe exactly where ext4_lblk_t (i.e. uint) overflows. For example, if\nac_g_ex.fe_logical is 4294965248 and ac_orig_goal_len is 2048, then the\ncomputed end is 0x100000000, which is 0. If ac-\u003eac_o_ex.fe_logical is not\nthe first case of adjusting the best extent, that is, new_bex_end \u003e 0, the\nfollowing BUG_ON will be triggered:\n\n=========================================================\nkernel BUG at fs/ext4/mballoc.c:5116!\ninvalid opcode: 0000 [#1] PREEMPT SMP PTI\nCPU: 3 PID: 673 Comm: xfs_io Tainted: G E 6.5.0-rc1+ #279\nRIP: 0010:ext4_mb_new_inode_pa+0xc5/0x430\nCall Trace:\n \u003cTASK\u003e\n ext4_mb_use_best_found+0x203/0x2f0\n ext4_mb_try_best_found+0x163/0x240\n ext4_mb_regular_allocator+0x158/0x1550\n ext4_mb_new_blocks+0x86a/0xe10\n ext4_ext_map_blocks+0xb0c/0x13a0\n ext4_map_blocks+0x2cd/0x8f0\n ext4_iomap_begin+0x27b/0x400\n iomap_iter+0x222/0x3d0\n __iomap_dio_rw+0x243/0xcb0\n iomap_dio_rw+0x16/0x80\n=========================================================\n\nA simple reproducer demonstrating the problem:\n\n\tmkfs.ext4 -F /dev/sda -b 4096 100M\n\tmount /dev/sda /tmp/test\n\tfallocate -l1M /tmp/test/tmp\n\tfallocate -l10M /tmp/test/file\n\tfallocate -i -o 1M -l16777203M /tmp/test/file\n\tfsstress -d /tmp/test -l 0 -n 100000 -p 8 \u0026\n\tsleep 10 \u0026\u0026 killall -9 fsstress\n\trm -f /tmp/test/tmp\n\txfs_io -c \"open -ad /tmp/test/file\" -c \"pwrite -S 0xff 0 8192\"\n\nWe simply refactor the logic for adjusting the best extent by adding\na temporary ext4_free_extent ex and use extent_logical_end() to avoid\noverflow, which also simplifies the code."
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          "url": "https://git.kernel.org/stable/c/58fe961c606c446f5612f6897827b1cac42c2e89"
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          "url": "https://git.kernel.org/stable/c/bc056e7163ac7db945366de219745cf94f32a3e6"
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      ],
      "title": "ext4: fix BUG in ext4_mb_new_inode_pa() due to overflow",
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    "datePublished": "2025-12-24T12:23:13.504Z",
    "dateReserved": "2025-12-24T12:21:05.093Z",
    "dateUpdated": "2026-05-23T15:32:21.855Z",
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      "date": "2026-09-15",
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    "nvd": "{\"cve\":{\"id\":\"CVE-2023-54069\",\"sourceIdentifier\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"published\":\"2025-12-24T13:16:08.747\",\"lastModified\":\"2026-06-17T06:46:44.757\",\"vulnStatus\":\"Deferred\",\"cveTags\":[],\"descriptions\":[{\"lang\":\"en\",\"value\":\"In the Linux kernel, the following vulnerability has been resolved:\\n\\next4: fix BUG in ext4_mb_new_inode_pa() due to overflow\\n\\nWhen we calculate the end position of ext4_free_extent, this position may\\nbe exactly where ext4_lblk_t (i.e. uint) overflows. For example, if\\nac_g_ex.fe_logical is 4294965248 and ac_orig_goal_len is 2048, then the\\ncomputed end is 0x100000000, which is 0. If ac-\u003eac_o_ex.fe_logical is not\\nthe first case of adjusting the best extent, that is, new_bex_end \u003e 0, the\\nfollowing BUG_ON will be triggered:\\n\\n=========================================================\\nkernel BUG at fs/ext4/mballoc.c:5116!\\ninvalid opcode: 0000 [#1] PREEMPT SMP PTI\\nCPU: 3 PID: 673 Comm: xfs_io Tainted: G E 6.5.0-rc1+ #279\\nRIP: 0010:ext4_mb_new_inode_pa+0xc5/0x430\\nCall Trace:\\n \u003cTASK\u003e\\n ext4_mb_use_best_found+0x203/0x2f0\\n ext4_mb_try_best_found+0x163/0x240\\n ext4_mb_regular_allocator+0x158/0x1550\\n ext4_mb_new_blocks+0x86a/0xe10\\n ext4_ext_map_blocks+0xb0c/0x13a0\\n ext4_map_blocks+0x2cd/0x8f0\\n ext4_iomap_begin+0x27b/0x400\\n iomap_iter+0x222/0x3d0\\n __iomap_dio_rw+0x243/0xcb0\\n iomap_dio_rw+0x16/0x80\\n=========================================================\\n\\nA simple reproducer demonstrating the problem:\\n\\n\\tmkfs.ext4 -F /dev/sda -b 4096 100M\\n\\tmount /dev/sda /tmp/test\\n\\tfallocate -l1M /tmp/test/tmp\\n\\tfallocate -l10M /tmp/test/file\\n\\tfallocate -i -o 1M -l16777203M /tmp/test/file\\n\\tfsstress -d /tmp/test -l 0 -n 100000 -p 8 \u0026\\n\\tsleep 10 \u0026\u0026 killall -9 fsstress\\n\\trm -f /tmp/test/tmp\\n\\txfs_io -c \\\"open -ad /tmp/test/file\\\" -c \\\"pwrite -S 0xff 0 8192\\\"\\n\\nWe simply refactor the logic for adjusting the best extent by adding\\na temporary ext4_free_extent ex and use extent_logical_end() to avoid\\noverflow, which also simplifies the code.\"}],\"affected\":[{\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"affectedData\":[{\"vendor\":\"Linux\",\"product\":\"Linux\",\"defaultStatus\":\"unaffected\",\"programFiles\":[\"fs/ext4/mballoc.c\"],\"repo\":\"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\",\"versions\":[{\"version\":\"8659c5f4ffaacbe932849b98462c3d635b4eacea\",\"lessThan\":\"83ecffd40c65844a73c2e93d7c841455786605ac\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"fc7237e191b99f88e859316fab2b06c2c26c8344\",\"lessThan\":\"58fe961c606c446f5612f6897827b1cac42c2e89\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"613f6cde5ebb005a37fda117cdda7b4126170c13\",\"lessThan\":\"f2c3a3aa6f11ad9878dbc3a067b0633e07b586c1\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"9d4430b7f862ce8835ca4e054b6916d15c8e0862\",\"lessThan\":\"fcefddf3a151b2c416b20120c06bb1ba9ad676fb\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"93cdf49f6eca5e23f6546b8f28457b2e6a6961d9\",\"lessThan\":\"b7e9ec38b6a0beb5a49cd1e76be0a9a07c218e90\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"93cdf49f6eca5e23f6546b8f28457b2e6a6961d9\",\"lessThan\":\"bc056e7163ac7db945366de219745cf94f32a3e6\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"46772ab99409cc72241227dd8f5295f358233fda\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"25a60b4533268477920faaeebd99e7e69c0735cd\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"cec4ef62b36b04e0bc8905732adab091f4bc1cfd\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"5.4.244\",\"lessThan\":\"5.4.260\",\"versionType\":\"semver\",\"status\":\"affected\"},{\"version\":\"5.10.181\",\"lessThan\":\"5.10.200\",\"versionType\":\"semver\",\"status\":\"affected\"},{\"version\":\"5.15.113\",\"lessThan\":\"5.15.138\",\"versionType\":\"semver\",\"status\":\"affected\"},{\"version\":\"6.1.30\",\"lessThan\":\"6.1.61\",\"versionType\":\"semver\",\"status\":\"affected\"},{\"version\":\"4.14.316\",\"lessThan\":\"4.15\",\"versionType\":\"semver\",\"status\":\"affected\"},{\"version\":\"4.19.284\",\"lessThan\":\"4.20\",\"versionType\":\"semver\",\"status\":\"affected\"},{\"version\":\"6.3.4\",\"lessThan\":\"6.4\",\"versionType\":\"semver\",\"status\":\"affected\"}]},{\"vendor\":\"Linux\",\"product\":\"Linux\",\"defaultStatus\":\"affected\",\"programFiles\":[\"fs/ext4/mballoc.c\"],\"repo\":\"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\",\"versions\":[{\"version\":\"6.4\",\"status\":\"affected\"},{\"version\":\"0\",\"lessThan\":\"6.4\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"5.4.260\",\"lessThanOrEqual\":\"5.4.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"5.10.200\",\"lessThanOrEqual\":\"5.10.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"5.15.138\",\"lessThanOrEqual\":\"5.15.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"6.1.61\",\"lessThanOrEqual\":\"6.1.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"6.5.5\",\"lessThanOrEqual\":\"6.5.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"6.6\",\"lessThanOrEqual\":\"*\",\"versionType\":\"original_commit_for_fix\",\"status\":\"unaffected\"}]}]}],\"metrics\":{},\"references\":[{\"url\":\"https://git.kernel.org/stable/c/58fe961c606c446f5612f6897827b1cac42c2e89\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/83ecffd40c65844a73c2e93d7c841455786605ac\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/b7e9ec38b6a0beb5a49cd1e76be0a9a07c218e90\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/bc056e7163ac7db945366de219745cf94f32a3e6\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/f2c3a3aa6f11ad9878dbc3a067b0633e07b586c1\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/fcefddf3a151b2c416b20120c06bb1ba9ad676fb\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"}]}}",
    "redhat_vex": {
      "aggregate_severity": "Low",
      "current_release_date": "2026-06-30T10:20:45+00:00",
      "cve": "CVE-2023-54069",
      "id": "CVE-2023-54069",
      "initial_release_date": "2023-01-01T00:00:00+00:00",
      "product_status:fixed": "279",
      "product_status:known_affected": "36",
      "product_status:known_not_affected": "152",
      "source": "Red Hat CSAF VEX",
      "status": "final",
      "title": "kernel: ext4: fix BUG in ext4_mb_new_inode_pa() due to overflow",
      "url": "https://security.access.redhat.com/data/csaf/v2/vex/2023/cve-2023-54069.json",
      "version": "3"
    },
    "suse_vex": {
      "aggregate_severity": "moderate",
      "current_release_date": "2026-09-11T02:18:50Z",
      "cve": "CVE-2023-54069",
      "id": "CVE-2023-54069",
      "initial_release_date": "2025-12-25T00:56:22Z",
      "product_status:known_affected": "394",
      "product_status:known_not_affected": "457",
      "product_status:recommended": "241",
      "source": "SUSE CSAF VEX",
      "status": "interim",
      "title": "SUSE CVE CVE-2023-54069",
      "url": "https://ftp.suse.com/pub/projects/security/csaf-vex/cve-2023-54069.json",
      "version": "35"
    }
  }
}



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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.

Sightings

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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.


Detection rules are retrieved from Rulezet.


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.