CVE-2025-40349 (GCVE-0-2025-40349)
Vulnerability from cvelistv5
Published
2025-12-16 13:30
Modified
2025-12-16 13:30
Severity ?
VLAI Severity ?
EPSS score ?
Summary
In the Linux kernel, the following vulnerability has been resolved:
hfs: validate record offset in hfsplus_bmap_alloc
hfsplus_bmap_alloc can trigger a crash if a
record offset or length is larger than node_size
[ 15.264282] BUG: KASAN: slab-out-of-bounds in hfsplus_bmap_alloc+0x887/0x8b0
[ 15.265192] Read of size 8 at addr ffff8881085ca188 by task test/183
[ 15.265949]
[ 15.266163] CPU: 0 UID: 0 PID: 183 Comm: test Not tainted 6.17.0-rc2-gc17b750b3ad9 #14 PREEMPT(voluntary)
[ 15.266165] Hardware name: QEMU Ubuntu 24.04 PC (i440FX + PIIX, 1996), BIOS 1.16.3-debian-1.16.3-2 04/01/2014
[ 15.266167] Call Trace:
[ 15.266168] <TASK>
[ 15.266169] dump_stack_lvl+0x53/0x70
[ 15.266173] print_report+0xd0/0x660
[ 15.266181] kasan_report+0xce/0x100
[ 15.266185] hfsplus_bmap_alloc+0x887/0x8b0
[ 15.266208] hfs_btree_inc_height.isra.0+0xd5/0x7c0
[ 15.266217] hfsplus_brec_insert+0x870/0xb00
[ 15.266222] __hfsplus_ext_write_extent+0x428/0x570
[ 15.266225] __hfsplus_ext_cache_extent+0x5e/0x910
[ 15.266227] hfsplus_ext_read_extent+0x1b2/0x200
[ 15.266233] hfsplus_file_extend+0x5a7/0x1000
[ 15.266237] hfsplus_get_block+0x12b/0x8c0
[ 15.266238] __block_write_begin_int+0x36b/0x12c0
[ 15.266251] block_write_begin+0x77/0x110
[ 15.266252] cont_write_begin+0x428/0x720
[ 15.266259] hfsplus_write_begin+0x51/0x100
[ 15.266262] cont_write_begin+0x272/0x720
[ 15.266270] hfsplus_write_begin+0x51/0x100
[ 15.266274] generic_perform_write+0x321/0x750
[ 15.266285] generic_file_write_iter+0xc3/0x310
[ 15.266289] __kernel_write_iter+0x2fd/0x800
[ 15.266296] dump_user_range+0x2ea/0x910
[ 15.266301] elf_core_dump+0x2a94/0x2ed0
[ 15.266320] vfs_coredump+0x1d85/0x45e0
[ 15.266349] get_signal+0x12e3/0x1990
[ 15.266357] arch_do_signal_or_restart+0x89/0x580
[ 15.266362] irqentry_exit_to_user_mode+0xab/0x110
[ 15.266364] asm_exc_page_fault+0x26/0x30
[ 15.266366] RIP: 0033:0x41bd35
[ 15.266367] Code: bc d1 f3 0f 7f 27 f3 0f 7f 6f 10 f3 0f 7f 77 20 f3 0f 7f 7f 30 49 83 c0 0f 49 29 d0 48 8d 7c 17 31 e9 9f 0b 00 00 66 0f ef c0 <f3> 0f 6f 0e f3 0f 6f 56 10 66 0f 74 c1 66 0f d7 d0 49 83 f8f
[ 15.266369] RSP: 002b:00007ffc9e62d078 EFLAGS: 00010283
[ 15.266371] RAX: 00007ffc9e62d100 RBX: 0000000000000000 RCX: 0000000000000000
[ 15.266372] RDX: 00000000000000e0 RSI: 0000000000000000 RDI: 00007ffc9e62d100
[ 15.266373] RBP: 0000400000000040 R08: 00000000000000e0 R09: 0000000000000000
[ 15.266374] R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
[ 15.266375] R13: 0000000000000000 R14: 0000000000000000 R15: 0000400000000000
[ 15.266376] </TASK>
When calling hfsplus_bmap_alloc to allocate a free node, this function
first retrieves the bitmap from header node and map node using node->page
together with the offset and length from hfs_brec_lenoff
```
len = hfs_brec_lenoff(node, 2, &off16);
off = off16;
off += node->page_offset;
pagep = node->page + (off >> PAGE_SHIFT);
data = kmap_local_page(*pagep);
```
However, if the retrieved offset or length is invalid(i.e. exceeds
node_size), the code may end up accessing pages outside the allocated
range for this node.
This patch adds proper validation of both offset and length before use,
preventing out-of-bounds page access. Move is_bnode_offset_valid and
check_and_correct_requested_length to hfsplus_fs.h, as they may be
required by other functions.
References
Impacted products
| Vendor | Product | Version | ||
|---|---|---|---|---|
| Linux | Linux |
Version: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 Version: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 Version: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 Version: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 Version: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 Version: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 Version: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 Version: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 |
||
{
"containers": {
"cna": {
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"defaultStatus": "unaffected",
"product": "Linux",
"programFiles": [
"fs/hfsplus/bnode.c",
"fs/hfsplus/btree.c",
"fs/hfsplus/hfsplus_fs.h"
],
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
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"programFiles": [
"fs/hfsplus/bnode.c",
"fs/hfsplus/btree.c",
"fs/hfsplus/hfsplus_fs.h"
],
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"versions": [
{
"lessThanOrEqual": "5.4.*",
"status": "unaffected",
"version": "5.4.301",
"versionType": "semver"
},
{
"lessThanOrEqual": "5.10.*",
"status": "unaffected",
"version": "5.10.246",
"versionType": "semver"
},
{
"lessThanOrEqual": "5.15.*",
"status": "unaffected",
"version": "5.15.196",
"versionType": "semver"
},
{
"lessThanOrEqual": "6.1.*",
"status": "unaffected",
"version": "6.1.158",
"versionType": "semver"
},
{
"lessThanOrEqual": "6.6.*",
"status": "unaffected",
"version": "6.6.115",
"versionType": "semver"
},
{
"lessThanOrEqual": "6.12.*",
"status": "unaffected",
"version": "6.12.56",
"versionType": "semver"
},
{
"lessThanOrEqual": "6.17.*",
"status": "unaffected",
"version": "6.17.6",
"versionType": "semver"
},
{
"lessThanOrEqual": "*",
"status": "unaffected",
"version": "6.18",
"versionType": "original_commit_for_fix"
}
]
}
],
"cpeApplicability": [
{
"nodes": [
{
"cpeMatch": [
{
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"versionEndExcluding": "5.4.301",
"vulnerable": true
},
{
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
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"vulnerable": true
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{
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{
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"versionEndExcluding": "6.6.115",
"vulnerable": true
},
{
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"versionEndExcluding": "6.12.56",
"vulnerable": true
},
{
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
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{
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"versionEndExcluding": "6.18",
"vulnerable": true
}
],
"negate": false,
"operator": "OR"
}
]
}
],
"descriptions": [
{
"lang": "en",
"value": "In the Linux kernel, the following vulnerability has been resolved:\n\nhfs: validate record offset in hfsplus_bmap_alloc\n\nhfsplus_bmap_alloc can trigger a crash if a\nrecord offset or length is larger than node_size\n\n[ 15.264282] BUG: KASAN: slab-out-of-bounds in hfsplus_bmap_alloc+0x887/0x8b0\n[ 15.265192] Read of size 8 at addr ffff8881085ca188 by task test/183\n[ 15.265949]\n[ 15.266163] CPU: 0 UID: 0 PID: 183 Comm: test Not tainted 6.17.0-rc2-gc17b750b3ad9 #14 PREEMPT(voluntary)\n[ 15.266165] Hardware name: QEMU Ubuntu 24.04 PC (i440FX + PIIX, 1996), BIOS 1.16.3-debian-1.16.3-2 04/01/2014\n[ 15.266167] Call Trace:\n[ 15.266168] \u003cTASK\u003e\n[ 15.266169] dump_stack_lvl+0x53/0x70\n[ 15.266173] print_report+0xd0/0x660\n[ 15.266181] kasan_report+0xce/0x100\n[ 15.266185] hfsplus_bmap_alloc+0x887/0x8b0\n[ 15.266208] hfs_btree_inc_height.isra.0+0xd5/0x7c0\n[ 15.266217] hfsplus_brec_insert+0x870/0xb00\n[ 15.266222] __hfsplus_ext_write_extent+0x428/0x570\n[ 15.266225] __hfsplus_ext_cache_extent+0x5e/0x910\n[ 15.266227] hfsplus_ext_read_extent+0x1b2/0x200\n[ 15.266233] hfsplus_file_extend+0x5a7/0x1000\n[ 15.266237] hfsplus_get_block+0x12b/0x8c0\n[ 15.266238] __block_write_begin_int+0x36b/0x12c0\n[ 15.266251] block_write_begin+0x77/0x110\n[ 15.266252] cont_write_begin+0x428/0x720\n[ 15.266259] hfsplus_write_begin+0x51/0x100\n[ 15.266262] cont_write_begin+0x272/0x720\n[ 15.266270] hfsplus_write_begin+0x51/0x100\n[ 15.266274] generic_perform_write+0x321/0x750\n[ 15.266285] generic_file_write_iter+0xc3/0x310\n[ 15.266289] __kernel_write_iter+0x2fd/0x800\n[ 15.266296] dump_user_range+0x2ea/0x910\n[ 15.266301] elf_core_dump+0x2a94/0x2ed0\n[ 15.266320] vfs_coredump+0x1d85/0x45e0\n[ 15.266349] get_signal+0x12e3/0x1990\n[ 15.266357] arch_do_signal_or_restart+0x89/0x580\n[ 15.266362] irqentry_exit_to_user_mode+0xab/0x110\n[ 15.266364] asm_exc_page_fault+0x26/0x30\n[ 15.266366] RIP: 0033:0x41bd35\n[ 15.266367] Code: bc d1 f3 0f 7f 27 f3 0f 7f 6f 10 f3 0f 7f 77 20 f3 0f 7f 7f 30 49 83 c0 0f 49 29 d0 48 8d 7c 17 31 e9 9f 0b 00 00 66 0f ef c0 \u003cf3\u003e 0f 6f 0e f3 0f 6f 56 10 66 0f 74 c1 66 0f d7 d0 49 83 f8f\n[ 15.266369] RSP: 002b:00007ffc9e62d078 EFLAGS: 00010283\n[ 15.266371] RAX: 00007ffc9e62d100 RBX: 0000000000000000 RCX: 0000000000000000\n[ 15.266372] RDX: 00000000000000e0 RSI: 0000000000000000 RDI: 00007ffc9e62d100\n[ 15.266373] RBP: 0000400000000040 R08: 00000000000000e0 R09: 0000000000000000\n[ 15.266374] R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000\n[ 15.266375] R13: 0000000000000000 R14: 0000000000000000 R15: 0000400000000000\n[ 15.266376] \u003c/TASK\u003e\n\nWhen calling hfsplus_bmap_alloc to allocate a free node, this function\nfirst retrieves the bitmap from header node and map node using node-\u003epage\ntogether with the offset and length from hfs_brec_lenoff\n\n```\nlen = hfs_brec_lenoff(node, 2, \u0026off16);\noff = off16;\n\noff += node-\u003epage_offset;\npagep = node-\u003epage + (off \u003e\u003e PAGE_SHIFT);\ndata = kmap_local_page(*pagep);\n```\n\nHowever, if the retrieved offset or length is invalid(i.e. exceeds\nnode_size), the code may end up accessing pages outside the allocated\nrange for this node.\n\nThis patch adds proper validation of both offset and length before use,\npreventing out-of-bounds page access. Move is_bnode_offset_valid and\ncheck_and_correct_requested_length to hfsplus_fs.h, as they may be\nrequired by other functions."
}
],
"providerMetadata": {
"dateUpdated": "2025-12-16T13:30:23.092Z",
"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"shortName": "Linux"
},
"references": [
{
"url": "https://git.kernel.org/stable/c/f7d9f600c7c3ff5dab36181a388af55f2c95604c"
},
{
"url": "https://git.kernel.org/stable/c/40dfe7a4215a1f20842561ffaf5a6f83a987e75b"
},
{
"url": "https://git.kernel.org/stable/c/418e48cab99c52c1760636a4dbe464bf6db2018b"
},
{
"url": "https://git.kernel.org/stable/c/0058d20d76182861dbdd8fd6e2dd8d18d6d3becf"
},
{
"url": "https://git.kernel.org/stable/c/4f40a2b3969daf10dca4dea6f6dd0e813f79b227"
},
{
"url": "https://git.kernel.org/stable/c/17ed51cfce6c62cffb97059ef392ad2e0245806e"
},
{
"url": "https://git.kernel.org/stable/c/068a46df3e6acc68fb9db0a6313ab379a11ecd6f"
},
{
"url": "https://git.kernel.org/stable/c/738d5a51864ed8d7a68600b8c0c63fe6fe5c4f20"
}
],
"title": "hfs: validate record offset in hfsplus_bmap_alloc",
"x_generator": {
"engine": "bippy-1.2.0"
}
}
},
"cveMetadata": {
"assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"assignerShortName": "Linux",
"cveId": "CVE-2025-40349",
"datePublished": "2025-12-16T13:30:23.092Z",
"dateReserved": "2025-04-16T07:20:57.187Z",
"dateUpdated": "2025-12-16T13:30:23.092Z",
"state": "PUBLISHED"
},
"dataType": "CVE_RECORD",
"dataVersion": "5.2",
"vulnerability-lookup:meta": {
"nvd": "{\"cve\":{\"id\":\"CVE-2025-40349\",\"sourceIdentifier\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"published\":\"2025-12-16T14:15:46.690\",\"lastModified\":\"2025-12-18T15:08:25.907\",\"vulnStatus\":\"Awaiting Analysis\",\"cveTags\":[],\"descriptions\":[{\"lang\":\"en\",\"value\":\"In the Linux kernel, the following vulnerability has been resolved:\\n\\nhfs: validate record offset in hfsplus_bmap_alloc\\n\\nhfsplus_bmap_alloc can trigger a crash if a\\nrecord offset or length is larger than node_size\\n\\n[ 15.264282] BUG: KASAN: slab-out-of-bounds in hfsplus_bmap_alloc+0x887/0x8b0\\n[ 15.265192] Read of size 8 at addr ffff8881085ca188 by task test/183\\n[ 15.265949]\\n[ 15.266163] CPU: 0 UID: 0 PID: 183 Comm: test Not tainted 6.17.0-rc2-gc17b750b3ad9 #14 PREEMPT(voluntary)\\n[ 15.266165] Hardware name: QEMU Ubuntu 24.04 PC (i440FX + PIIX, 1996), BIOS 1.16.3-debian-1.16.3-2 04/01/2014\\n[ 15.266167] Call Trace:\\n[ 15.266168] \u003cTASK\u003e\\n[ 15.266169] dump_stack_lvl+0x53/0x70\\n[ 15.266173] print_report+0xd0/0x660\\n[ 15.266181] kasan_report+0xce/0x100\\n[ 15.266185] hfsplus_bmap_alloc+0x887/0x8b0\\n[ 15.266208] hfs_btree_inc_height.isra.0+0xd5/0x7c0\\n[ 15.266217] hfsplus_brec_insert+0x870/0xb00\\n[ 15.266222] __hfsplus_ext_write_extent+0x428/0x570\\n[ 15.266225] __hfsplus_ext_cache_extent+0x5e/0x910\\n[ 15.266227] hfsplus_ext_read_extent+0x1b2/0x200\\n[ 15.266233] hfsplus_file_extend+0x5a7/0x1000\\n[ 15.266237] hfsplus_get_block+0x12b/0x8c0\\n[ 15.266238] __block_write_begin_int+0x36b/0x12c0\\n[ 15.266251] block_write_begin+0x77/0x110\\n[ 15.266252] cont_write_begin+0x428/0x720\\n[ 15.266259] hfsplus_write_begin+0x51/0x100\\n[ 15.266262] cont_write_begin+0x272/0x720\\n[ 15.266270] hfsplus_write_begin+0x51/0x100\\n[ 15.266274] generic_perform_write+0x321/0x750\\n[ 15.266285] generic_file_write_iter+0xc3/0x310\\n[ 15.266289] __kernel_write_iter+0x2fd/0x800\\n[ 15.266296] dump_user_range+0x2ea/0x910\\n[ 15.266301] elf_core_dump+0x2a94/0x2ed0\\n[ 15.266320] vfs_coredump+0x1d85/0x45e0\\n[ 15.266349] get_signal+0x12e3/0x1990\\n[ 15.266357] arch_do_signal_or_restart+0x89/0x580\\n[ 15.266362] irqentry_exit_to_user_mode+0xab/0x110\\n[ 15.266364] asm_exc_page_fault+0x26/0x30\\n[ 15.266366] RIP: 0033:0x41bd35\\n[ 15.266367] Code: bc d1 f3 0f 7f 27 f3 0f 7f 6f 10 f3 0f 7f 77 20 f3 0f 7f 7f 30 49 83 c0 0f 49 29 d0 48 8d 7c 17 31 e9 9f 0b 00 00 66 0f ef c0 \u003cf3\u003e 0f 6f 0e f3 0f 6f 56 10 66 0f 74 c1 66 0f d7 d0 49 83 f8f\\n[ 15.266369] RSP: 002b:00007ffc9e62d078 EFLAGS: 00010283\\n[ 15.266371] RAX: 00007ffc9e62d100 RBX: 0000000000000000 RCX: 0000000000000000\\n[ 15.266372] RDX: 00000000000000e0 RSI: 0000000000000000 RDI: 00007ffc9e62d100\\n[ 15.266373] RBP: 0000400000000040 R08: 00000000000000e0 R09: 0000000000000000\\n[ 15.266374] R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000\\n[ 15.266375] R13: 0000000000000000 R14: 0000000000000000 R15: 0000400000000000\\n[ 15.266376] \u003c/TASK\u003e\\n\\nWhen calling hfsplus_bmap_alloc to allocate a free node, this function\\nfirst retrieves the bitmap from header node and map node using node-\u003epage\\ntogether with the offset and length from hfs_brec_lenoff\\n\\n```\\nlen = hfs_brec_lenoff(node, 2, \u0026off16);\\noff = off16;\\n\\noff += node-\u003epage_offset;\\npagep = node-\u003epage + (off \u003e\u003e PAGE_SHIFT);\\ndata = kmap_local_page(*pagep);\\n```\\n\\nHowever, if the retrieved offset or length is invalid(i.e. exceeds\\nnode_size), the code may end up accessing pages outside the allocated\\nrange for this node.\\n\\nThis patch adds proper validation of both offset and length before use,\\npreventing out-of-bounds page access. Move is_bnode_offset_valid and\\ncheck_and_correct_requested_length to hfsplus_fs.h, as they may be\\nrequired by other functions.\"}],\"metrics\":{},\"references\":[{\"url\":\"https://git.kernel.org/stable/c/0058d20d76182861dbdd8fd6e2dd8d18d6d3becf\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/068a46df3e6acc68fb9db0a6313ab379a11ecd6f\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/17ed51cfce6c62cffb97059ef392ad2e0245806e\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/40dfe7a4215a1f20842561ffaf5a6f83a987e75b\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/418e48cab99c52c1760636a4dbe464bf6db2018b\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/4f40a2b3969daf10dca4dea6f6dd0e813f79b227\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/738d5a51864ed8d7a68600b8c0c63fe6fe5c4f20\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/f7d9f600c7c3ff5dab36181a388af55f2c95604c\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"}]}}"
}
}
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Sightings
| Author | Source | Type | Date |
|---|
Nomenclature
- Seen: The vulnerability was mentioned, discussed, or seen somewhere by the user.
- Confirmed: The vulnerability is confirmed from an analyst perspective.
- Published Proof of Concept: A public proof of concept is available for this vulnerability.
- Exploited: This vulnerability was exploited and seen by the user reporting the sighting.
- Patched: This vulnerability was successfully patched by the user reporting the sighting.
- Not exploited: This vulnerability was not exploited or seen by the user reporting the sighting.
- Not confirmed: The user expresses doubt about the veracity of the vulnerability.
- Not patched: This vulnerability was not successfully patched by the user reporting the sighting.
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