CVE-2025-37742 (GCVE-0-2025-37742)

Vulnerability from cvelistv5 – Published: 2025-05-01 12:55 – Updated: 2026-05-11 21:14
VLAI
Title
jfs: Fix uninit-value access of imap allocated in the diMount() function
Summary
In the Linux kernel, the following vulnerability has been resolved: jfs: Fix uninit-value access of imap allocated in the diMount() function syzbot reports that hex_dump_to_buffer is using uninit-value: ===================================================== BUG: KMSAN: uninit-value in hex_dump_to_buffer+0x888/0x1100 lib/hexdump.c:171 hex_dump_to_buffer+0x888/0x1100 lib/hexdump.c:171 print_hex_dump+0x13d/0x3e0 lib/hexdump.c:276 diFree+0x5ba/0x4350 fs/jfs/jfs_imap.c:876 jfs_evict_inode+0x510/0x550 fs/jfs/inode.c:156 evict+0x723/0xd10 fs/inode.c:796 iput_final fs/inode.c:1946 [inline] iput+0x97b/0xdb0 fs/inode.c:1972 txUpdateMap+0xf3e/0x1150 fs/jfs/jfs_txnmgr.c:2367 txLazyCommit fs/jfs/jfs_txnmgr.c:2664 [inline] jfs_lazycommit+0x627/0x11d0 fs/jfs/jfs_txnmgr.c:2733 kthread+0x6b9/0xef0 kernel/kthread.c:464 ret_from_fork+0x6d/0x90 arch/x86/kernel/process.c:148 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244 Uninit was created at: slab_post_alloc_hook mm/slub.c:4121 [inline] slab_alloc_node mm/slub.c:4164 [inline] __kmalloc_cache_noprof+0x8e3/0xdf0 mm/slub.c:4320 kmalloc_noprof include/linux/slab.h:901 [inline] diMount+0x61/0x7f0 fs/jfs/jfs_imap.c:105 jfs_mount+0xa8e/0x11d0 fs/jfs/jfs_mount.c:176 jfs_fill_super+0xa47/0x17c0 fs/jfs/super.c:523 get_tree_bdev_flags+0x6ec/0x910 fs/super.c:1636 get_tree_bdev+0x37/0x50 fs/super.c:1659 jfs_get_tree+0x34/0x40 fs/jfs/super.c:635 vfs_get_tree+0xb1/0x5a0 fs/super.c:1814 do_new_mount+0x71f/0x15e0 fs/namespace.c:3560 path_mount+0x742/0x1f10 fs/namespace.c:3887 do_mount fs/namespace.c:3900 [inline] __do_sys_mount fs/namespace.c:4111 [inline] __se_sys_mount+0x71f/0x800 fs/namespace.c:4088 __x64_sys_mount+0xe4/0x150 fs/namespace.c:4088 x64_sys_call+0x39bf/0x3c30 arch/x86/include/generated/asm/syscalls_64.h:166 do_syscall_x64 arch/x86/entry/common.c:52 [inline] do_syscall_64+0xcd/0x1e0 arch/x86/entry/common.c:83 entry_SYSCALL_64_after_hwframe+0x77/0x7f ===================================================== The reason is that imap is not properly initialized after memory allocation. It will cause the snprintf() function to write uninitialized data into linebuf within hex_dump_to_buffer(). Fix this by using kzalloc instead of kmalloc to clear its content at the beginning in diMount().
Severity
No CVSS data available.
Assigner
References
Impacted products
Vendor Product Version
Linux Linux Affected: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 , < 4f10732712fce33e53703ffe5ed9155f23814097 (git)
Affected: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 , < cab1852368dd74d629ee02abdbc559218ca64dde (git)
Affected: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 , < 067347e00a3a7d04afed93f080c6c131e5dd15ee (git)
Affected: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 , < 63148ce4904faa668daffdd1d3c1199ae315ef2c (git)
Affected: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 , < 7057f3aab47629d38e54eae83505813cf0da1e4b (git)
Affected: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 , < d0d7eca253ccd0619b3d2b683ffe32218ebca9ac (git)
Affected: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 , < 9629d7d66c621671d9a47afe27ca9336bfc8a9ea (git)
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Linux Linux Affected: 2.6.12
Unaffected: 0 , < 2.6.12 (semver)
Unaffected: 5.15.181 , ≤ 5.15.* (semver)
Unaffected: 6.1.135 , ≤ 6.1.* (semver)
Unaffected: 6.6.88 , ≤ 6.6.* (semver)
Unaffected: 6.12.24 , ≤ 6.12.* (semver)
Unaffected: 6.13.12 , ≤ 6.13.* (semver)
Unaffected: 6.14.3 , ≤ 6.14.* (semver)
Unaffected: 6.15 , ≤ * (original_commit_for_fix)
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          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\njfs: Fix uninit-value access of imap allocated in the diMount() function\n\nsyzbot reports that hex_dump_to_buffer is using uninit-value:\n\n=====================================================\nBUG: KMSAN: uninit-value in hex_dump_to_buffer+0x888/0x1100 lib/hexdump.c:171\nhex_dump_to_buffer+0x888/0x1100 lib/hexdump.c:171\nprint_hex_dump+0x13d/0x3e0 lib/hexdump.c:276\ndiFree+0x5ba/0x4350 fs/jfs/jfs_imap.c:876\njfs_evict_inode+0x510/0x550 fs/jfs/inode.c:156\nevict+0x723/0xd10 fs/inode.c:796\niput_final fs/inode.c:1946 [inline]\niput+0x97b/0xdb0 fs/inode.c:1972\ntxUpdateMap+0xf3e/0x1150 fs/jfs/jfs_txnmgr.c:2367\ntxLazyCommit fs/jfs/jfs_txnmgr.c:2664 [inline]\njfs_lazycommit+0x627/0x11d0 fs/jfs/jfs_txnmgr.c:2733\nkthread+0x6b9/0xef0 kernel/kthread.c:464\nret_from_fork+0x6d/0x90 arch/x86/kernel/process.c:148\nret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244\n\nUninit was created at:\nslab_post_alloc_hook mm/slub.c:4121 [inline]\nslab_alloc_node mm/slub.c:4164 [inline]\n__kmalloc_cache_noprof+0x8e3/0xdf0 mm/slub.c:4320\nkmalloc_noprof include/linux/slab.h:901 [inline]\ndiMount+0x61/0x7f0 fs/jfs/jfs_imap.c:105\njfs_mount+0xa8e/0x11d0 fs/jfs/jfs_mount.c:176\njfs_fill_super+0xa47/0x17c0 fs/jfs/super.c:523\nget_tree_bdev_flags+0x6ec/0x910 fs/super.c:1636\nget_tree_bdev+0x37/0x50 fs/super.c:1659\njfs_get_tree+0x34/0x40 fs/jfs/super.c:635\nvfs_get_tree+0xb1/0x5a0 fs/super.c:1814\ndo_new_mount+0x71f/0x15e0 fs/namespace.c:3560\npath_mount+0x742/0x1f10 fs/namespace.c:3887\ndo_mount fs/namespace.c:3900 [inline]\n__do_sys_mount fs/namespace.c:4111 [inline]\n__se_sys_mount+0x71f/0x800 fs/namespace.c:4088\n__x64_sys_mount+0xe4/0x150 fs/namespace.c:4088\nx64_sys_call+0x39bf/0x3c30 arch/x86/include/generated/asm/syscalls_64.h:166\ndo_syscall_x64 arch/x86/entry/common.c:52 [inline]\ndo_syscall_64+0xcd/0x1e0 arch/x86/entry/common.c:83\nentry_SYSCALL_64_after_hwframe+0x77/0x7f\n=====================================================\n\nThe reason is that imap is not properly initialized after memory\nallocation. It will cause the snprintf() function to write uninitialized\ndata into linebuf within hex_dump_to_buffer().\n\nFix this by using kzalloc instead of kmalloc to clear its content at the\nbeginning in diMount()."
        }
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      "title": "jfs: Fix uninit-value access of imap allocated in the diMount() function",
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    "datePublished": "2025-05-01T12:55:50.603Z",
    "dateReserved": "2025-04-16T04:51:23.936Z",
    "dateUpdated": "2026-05-11T21:14:17.131Z",
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      "date": "2026-05-26",
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    "nvd": "{\"cve\":{\"id\":\"CVE-2025-37742\",\"sourceIdentifier\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"published\":\"2025-05-01T13:15:52.870\",\"lastModified\":\"2025-11-04T18:08:18.777\",\"vulnStatus\":\"Analyzed\",\"cveTags\":[],\"descriptions\":[{\"lang\":\"en\",\"value\":\"In the Linux kernel, the following vulnerability has been resolved:\\n\\njfs: Fix uninit-value access of imap allocated in the diMount() function\\n\\nsyzbot reports that hex_dump_to_buffer is using uninit-value:\\n\\n=====================================================\\nBUG: KMSAN: uninit-value in hex_dump_to_buffer+0x888/0x1100 lib/hexdump.c:171\\nhex_dump_to_buffer+0x888/0x1100 lib/hexdump.c:171\\nprint_hex_dump+0x13d/0x3e0 lib/hexdump.c:276\\ndiFree+0x5ba/0x4350 fs/jfs/jfs_imap.c:876\\njfs_evict_inode+0x510/0x550 fs/jfs/inode.c:156\\nevict+0x723/0xd10 fs/inode.c:796\\niput_final fs/inode.c:1946 [inline]\\niput+0x97b/0xdb0 fs/inode.c:1972\\ntxUpdateMap+0xf3e/0x1150 fs/jfs/jfs_txnmgr.c:2367\\ntxLazyCommit fs/jfs/jfs_txnmgr.c:2664 [inline]\\njfs_lazycommit+0x627/0x11d0 fs/jfs/jfs_txnmgr.c:2733\\nkthread+0x6b9/0xef0 kernel/kthread.c:464\\nret_from_fork+0x6d/0x90 arch/x86/kernel/process.c:148\\nret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244\\n\\nUninit was created at:\\nslab_post_alloc_hook mm/slub.c:4121 [inline]\\nslab_alloc_node mm/slub.c:4164 [inline]\\n__kmalloc_cache_noprof+0x8e3/0xdf0 mm/slub.c:4320\\nkmalloc_noprof include/linux/slab.h:901 [inline]\\ndiMount+0x61/0x7f0 fs/jfs/jfs_imap.c:105\\njfs_mount+0xa8e/0x11d0 fs/jfs/jfs_mount.c:176\\njfs_fill_super+0xa47/0x17c0 fs/jfs/super.c:523\\nget_tree_bdev_flags+0x6ec/0x910 fs/super.c:1636\\nget_tree_bdev+0x37/0x50 fs/super.c:1659\\njfs_get_tree+0x34/0x40 fs/jfs/super.c:635\\nvfs_get_tree+0xb1/0x5a0 fs/super.c:1814\\ndo_new_mount+0x71f/0x15e0 fs/namespace.c:3560\\npath_mount+0x742/0x1f10 fs/namespace.c:3887\\ndo_mount fs/namespace.c:3900 [inline]\\n__do_sys_mount fs/namespace.c:4111 [inline]\\n__se_sys_mount+0x71f/0x800 fs/namespace.c:4088\\n__x64_sys_mount+0xe4/0x150 fs/namespace.c:4088\\nx64_sys_call+0x39bf/0x3c30 arch/x86/include/generated/asm/syscalls_64.h:166\\ndo_syscall_x64 arch/x86/entry/common.c:52 [inline]\\ndo_syscall_64+0xcd/0x1e0 arch/x86/entry/common.c:83\\nentry_SYSCALL_64_after_hwframe+0x77/0x7f\\n=====================================================\\n\\nThe reason is that imap is not properly initialized after memory\\nallocation. It will cause the snprintf() function to write uninitialized\\ndata into linebuf within hex_dump_to_buffer().\\n\\nFix this by using kzalloc instead of kmalloc to clear its content at the\\nbeginning in diMount().\"},{\"lang\":\"es\",\"value\":\"En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: jfs: Se corrige el acceso a un valor no inicializado de imap asignado en la funci\u00f3n diMount() syzbot informa que hex_dump_to_buffer est\u00e1 usando un valor no inicializado: ======================================================== ERROR: KMSAN: un valor no inicializado en hex_dump_to_buffer+0x888/0x1100 lib/hexdump.c:171 hex_dump_to_buffer+0x888/0x1100 lib/hexdump.c:171 print_hex_dump+0x13d/0x3e0 lib/hexdump.c:276 diFree+0x5ba/0x4350 fs/jfs/jfs_imap.c:876 jfs_evict_inode+0x510/0x550 fs/jfs/inode.c:156 evict+0x723/0xd10 fs/inode.c:796 iput_final fs/inode.c:1946 [en l\u00ednea] iput+0x97b/0xdb0 fs/inode.c:1972 txUpdateMap+0xf3e/0x1150 fs/jfs/jfs_txnmgr.c:2367 txLazyCommit fs/jfs/jfs_txnmgr.c:2664 [en l\u00ednea] jfs_lazycommit+0x627/0x11d0 fs/jfs/jfs_txnmgr.c:2733 kthread+0x6b9/0xef0 kernel/kthread.c:464 ret_from_fork+0x6d/0x90 arch/x86/kernel/process.c:148 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244 Uninit se cre\u00f3 en: slab_post_alloc_hook mm/slub.c:4121 [en l\u00ednea] slab_alloc_node mm/slub.c:4164 [en l\u00ednea] __kmalloc_cache_noprof+0x8e3/0xdf0 mm/slub.c:4320 kmalloc_noprof include/linux/slab.h:901 [en l\u00ednea] diMount+0x61/0x7f0 fs/jfs/jfs_imap.c:105 jfs_mount+0xa8e/0x11d0 fs/jfs/jfs_mount.c:176 jfs_fill_super+0xa47/0x17c0 fs/jfs/super.c:523 obtener_\u00e1rbol_bdev_flags+0x6ec/0x910 fs/super.c:1636 obtener_\u00e1rbol_bdev+0x37/0x50 fs/super.c:1659 jfs_obtener_\u00e1rbol+0x34/0x40 fs/jfs/super.c:635 vfs_obtener_\u00e1rbol+0xb1/0x5a0 fs/super.c:1814 hacer_nuevo_montaje+0x71f/0x15e0 fs/espacio_de_nombres.c:3560 path_mount+0x742/0x1f10 fs/namespace.c:3887 do_mount fs/namespace.c:3900 [en l\u00ednea] __do_sys_mount fs/namespace.c:4111 [en l\u00ednea] __se_sys_mount+0x71f/0x800 fs/namespace.c:4088 __x64_sys_mount+0xe4/0x150 fs/namespace.c:4088 x64_sys_call+0x39bf/0x3c30 arch/x86/include/generated/asm/syscalls_64.h:166 do_syscall_x64 arch/x86/entry/common.c:52 [en l\u00ednea] do_syscall_64+0xcd/0x1e0 arch/x86/entry/common.c:83 entry_SYSCALL_64_after_hwframe+0x77/0x7f == ...\"}],\"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-908\"}]}],\"configurations\":[{\"nodes\":[{\"operator\":\"OR\",\"negate\":false,\"cpeMatch\":[{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\",\"versionEndExcluding\":\"5.15.181\",\"matchCriteriaId\":\"E1AE45B7-B31B-48DF-9F83-959F56624B62\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"5.16\",\"versionEndExcluding\":\"6.1.135\",\"matchCriteriaId\":\"5B9ACE29-7445-4B6F-B761-6367C005E275\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"6.2\",\"versionEndExcluding\":\"6.6.88\",\"matchCriteriaId\":\"6E5947E5-45E3-462A-829B-382B3B1C61BD\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"6.7\",\"versionEndExcluding\":\"6.12.24\",\"matchCriteriaId\":\"1D35A8A8-F3EC-45E6-AD37-1F154B27529D\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"6.13\",\"versionEndExcluding\":\"6.13.12\",\"matchCriteriaId\":\"4A475784-BF3B-4514-81EE-49C8522FB24A\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"6.14\",\"versionEndExcluding\":\"6.14.3\",\"matchCriteriaId\":\"483E2E15-2135-4EC6-AB64-16282C5EF704\"}]}]},{\"nodes\":[{\"operator\":\"OR\",\"negate\":false,\"cpeMatch\":[{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:debian:debian_linux:11.0:*:*:*:*:*:*:*\",\"matchCriteriaId\":\"FA6FEEC2-9F11-4643-8827-749718254FED\"}]}]}],\"references\":[{\"url\":\"https://git.kernel.org/stable/c/067347e00a3a7d04afed93f080c6c131e5dd15ee\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"tags\":[\"Patch\"]},{\"url\":\"https://git.kernel.org/stable/c/4f10732712fce33e53703ffe5ed9155f23814097\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"tags\":[\"Patch\"]},{\"url\":\"https://git.kernel.org/stable/c/63148ce4904faa668daffdd1d3c1199ae315ef2c\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"tags\":[\"Patch\"]},{\"url\":\"https://git.kernel.org/stable/c/7057f3aab47629d38e54eae83505813cf0da1e4b\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"tags\":[\"Patch\"]},{\"url\":\"https://git.kernel.org/stable/c/9629d7d66c621671d9a47afe27ca9336bfc8a9ea\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"tags\":[\"Patch\"]},{\"url\":\"https://git.kernel.org/stable/c/cab1852368dd74d629ee02abdbc559218ca64dde\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"tags\":[\"Patch\"]},{\"url\":\"https://git.kernel.org/stable/c/d0d7eca253ccd0619b3d2b683ffe32218ebca9ac\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"tags\":[\"Patch\"]},{\"url\":\"https://lists.debian.org/debian-lts-announce/2025/05/msg00045.html\",\"source\":\"af854a3a-2127-422b-91ae-364da2661108\",\"tags\":[\"Mailing List\"]}]}}"
  }
}


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Taxonomy of the tags.




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

Author Source Type Date Other

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.