CVE-2025-38473 (GCVE-0-2025-38473)
Vulnerability from cvelistv5
Published
2025-07-28 11:21
Modified
2025-07-28 11:21
Severity ?
VLAI Severity ?
EPSS score ?
Summary
In the Linux kernel, the following vulnerability has been resolved:
Bluetooth: Fix null-ptr-deref in l2cap_sock_resume_cb()
syzbot reported null-ptr-deref in l2cap_sock_resume_cb(). [0]
l2cap_sock_resume_cb() has a similar problem that was fixed by commit
1bff51ea59a9 ("Bluetooth: fix use-after-free error in lock_sock_nested()").
Since both l2cap_sock_kill() and l2cap_sock_resume_cb() are executed
under l2cap_sock_resume_cb(), we can avoid the issue simply by checking
if chan->data is NULL.
Let's not access to the killed socket in l2cap_sock_resume_cb().
[0]:
BUG: KASAN: null-ptr-deref in instrument_atomic_write include/linux/instrumented.h:82 [inline]
BUG: KASAN: null-ptr-deref in clear_bit include/asm-generic/bitops/instrumented-atomic.h:41 [inline]
BUG: KASAN: null-ptr-deref in l2cap_sock_resume_cb+0xb4/0x17c net/bluetooth/l2cap_sock.c:1711
Write of size 8 at addr 0000000000000570 by task kworker/u9:0/52
CPU: 1 UID: 0 PID: 52 Comm: kworker/u9:0 Not tainted 6.16.0-rc4-syzkaller-g7482bb149b9f #0 PREEMPT
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/07/2025
Workqueue: hci0 hci_rx_work
Call trace:
show_stack+0x2c/0x3c arch/arm64/kernel/stacktrace.c:501 (C)
__dump_stack+0x30/0x40 lib/dump_stack.c:94
dump_stack_lvl+0xd8/0x12c lib/dump_stack.c:120
print_report+0x58/0x84 mm/kasan/report.c:524
kasan_report+0xb0/0x110 mm/kasan/report.c:634
check_region_inline mm/kasan/generic.c:-1 [inline]
kasan_check_range+0x264/0x2a4 mm/kasan/generic.c:189
__kasan_check_write+0x20/0x30 mm/kasan/shadow.c:37
instrument_atomic_write include/linux/instrumented.h:82 [inline]
clear_bit include/asm-generic/bitops/instrumented-atomic.h:41 [inline]
l2cap_sock_resume_cb+0xb4/0x17c net/bluetooth/l2cap_sock.c:1711
l2cap_security_cfm+0x524/0xea0 net/bluetooth/l2cap_core.c:7357
hci_auth_cfm include/net/bluetooth/hci_core.h:2092 [inline]
hci_auth_complete_evt+0x2e8/0xa4c net/bluetooth/hci_event.c:3514
hci_event_func net/bluetooth/hci_event.c:7511 [inline]
hci_event_packet+0x650/0xe9c net/bluetooth/hci_event.c:7565
hci_rx_work+0x320/0xb18 net/bluetooth/hci_core.c:4070
process_one_work+0x7e8/0x155c kernel/workqueue.c:3238
process_scheduled_works kernel/workqueue.c:3321 [inline]
worker_thread+0x958/0xed8 kernel/workqueue.c:3402
kthread+0x5fc/0x75c kernel/kthread.c:464
ret_from_fork+0x10/0x20 arch/arm64/kernel/entry.S:847
References
Impacted products
{
"containers": {
"cna": {
"affected": [
{
"defaultStatus": "unaffected",
"product": "Linux",
"programFiles": [
"net/bluetooth/l2cap_sock.c"
],
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"versions": [
{
"lessThan": "ac3a8147bb24314fb3e84986590148e79f9872ec",
"status": "affected",
"version": "d97c899bde330cd1c76c3a162558177563a74362",
"versionType": "git"
},
{
"lessThan": "c4f16f6b071a74ac7eefe5c28985285cbbe2cd96",
"status": "affected",
"version": "d97c899bde330cd1c76c3a162558177563a74362",
"versionType": "git"
},
{
"lessThan": "b97be7ee8a1cd96b89817cbd64a9f5cc16c17d08",
"status": "affected",
"version": "d97c899bde330cd1c76c3a162558177563a74362",
"versionType": "git"
},
{
"lessThan": "6d63901dcd592a1e3f71d7c6d78f9be5e8d7eef0",
"status": "affected",
"version": "d97c899bde330cd1c76c3a162558177563a74362",
"versionType": "git"
},
{
"lessThan": "a0075accbf0d76c2dad1ad3993d2e944505d99a0",
"status": "affected",
"version": "d97c899bde330cd1c76c3a162558177563a74362",
"versionType": "git"
}
]
},
{
"defaultStatus": "affected",
"product": "Linux",
"programFiles": [
"net/bluetooth/l2cap_sock.c"
],
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"versions": [
{
"status": "affected",
"version": "3.13"
},
{
"lessThan": "3.13",
"status": "unaffected",
"version": "0",
"versionType": "semver"
},
{
"lessThanOrEqual": "6.1.*",
"status": "unaffected",
"version": "6.1.147",
"versionType": "semver"
},
{
"lessThanOrEqual": "6.6.*",
"status": "unaffected",
"version": "6.6.100",
"versionType": "semver"
},
{
"lessThanOrEqual": "6.12.*",
"status": "unaffected",
"version": "6.12.40",
"versionType": "semver"
},
{
"lessThanOrEqual": "6.15.*",
"status": "unaffected",
"version": "6.15.8",
"versionType": "semver"
},
{
"lessThanOrEqual": "*",
"status": "unaffected",
"version": "6.16",
"versionType": "original_commit_for_fix"
}
]
}
],
"cpeApplicability": [
{
"nodes": [
{
"cpeMatch": [
{
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"versionEndExcluding": "6.1.147",
"versionStartIncluding": "3.13",
"vulnerable": true
},
{
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"versionEndExcluding": "6.6.100",
"versionStartIncluding": "3.13",
"vulnerable": true
},
{
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"versionEndExcluding": "6.12.40",
"versionStartIncluding": "3.13",
"vulnerable": true
},
{
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"versionEndExcluding": "6.15.8",
"versionStartIncluding": "3.13",
"vulnerable": true
},
{
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"versionEndExcluding": "6.16",
"versionStartIncluding": "3.13",
"vulnerable": true
}
],
"negate": false,
"operator": "OR"
}
]
}
],
"descriptions": [
{
"lang": "en",
"value": "In the Linux kernel, the following vulnerability has been resolved:\n\nBluetooth: Fix null-ptr-deref in l2cap_sock_resume_cb()\n\nsyzbot reported null-ptr-deref in l2cap_sock_resume_cb(). [0]\n\nl2cap_sock_resume_cb() has a similar problem that was fixed by commit\n1bff51ea59a9 (\"Bluetooth: fix use-after-free error in lock_sock_nested()\").\n\nSince both l2cap_sock_kill() and l2cap_sock_resume_cb() are executed\nunder l2cap_sock_resume_cb(), we can avoid the issue simply by checking\nif chan-\u003edata is NULL.\n\nLet\u0027s not access to the killed socket in l2cap_sock_resume_cb().\n\n[0]:\nBUG: KASAN: null-ptr-deref in instrument_atomic_write include/linux/instrumented.h:82 [inline]\nBUG: KASAN: null-ptr-deref in clear_bit include/asm-generic/bitops/instrumented-atomic.h:41 [inline]\nBUG: KASAN: null-ptr-deref in l2cap_sock_resume_cb+0xb4/0x17c net/bluetooth/l2cap_sock.c:1711\nWrite of size 8 at addr 0000000000000570 by task kworker/u9:0/52\n\nCPU: 1 UID: 0 PID: 52 Comm: kworker/u9:0 Not tainted 6.16.0-rc4-syzkaller-g7482bb149b9f #0 PREEMPT\nHardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/07/2025\nWorkqueue: hci0 hci_rx_work\nCall trace:\n show_stack+0x2c/0x3c arch/arm64/kernel/stacktrace.c:501 (C)\n __dump_stack+0x30/0x40 lib/dump_stack.c:94\n dump_stack_lvl+0xd8/0x12c lib/dump_stack.c:120\n print_report+0x58/0x84 mm/kasan/report.c:524\n kasan_report+0xb0/0x110 mm/kasan/report.c:634\n check_region_inline mm/kasan/generic.c:-1 [inline]\n kasan_check_range+0x264/0x2a4 mm/kasan/generic.c:189\n __kasan_check_write+0x20/0x30 mm/kasan/shadow.c:37\n instrument_atomic_write include/linux/instrumented.h:82 [inline]\n clear_bit include/asm-generic/bitops/instrumented-atomic.h:41 [inline]\n l2cap_sock_resume_cb+0xb4/0x17c net/bluetooth/l2cap_sock.c:1711\n l2cap_security_cfm+0x524/0xea0 net/bluetooth/l2cap_core.c:7357\n hci_auth_cfm include/net/bluetooth/hci_core.h:2092 [inline]\n hci_auth_complete_evt+0x2e8/0xa4c net/bluetooth/hci_event.c:3514\n hci_event_func net/bluetooth/hci_event.c:7511 [inline]\n hci_event_packet+0x650/0xe9c net/bluetooth/hci_event.c:7565\n hci_rx_work+0x320/0xb18 net/bluetooth/hci_core.c:4070\n process_one_work+0x7e8/0x155c kernel/workqueue.c:3238\n process_scheduled_works kernel/workqueue.c:3321 [inline]\n worker_thread+0x958/0xed8 kernel/workqueue.c:3402\n kthread+0x5fc/0x75c kernel/kthread.c:464\n ret_from_fork+0x10/0x20 arch/arm64/kernel/entry.S:847"
}
],
"providerMetadata": {
"dateUpdated": "2025-07-28T11:21:34.880Z",
"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"shortName": "Linux"
},
"references": [
{
"url": "https://git.kernel.org/stable/c/ac3a8147bb24314fb3e84986590148e79f9872ec"
},
{
"url": "https://git.kernel.org/stable/c/c4f16f6b071a74ac7eefe5c28985285cbbe2cd96"
},
{
"url": "https://git.kernel.org/stable/c/b97be7ee8a1cd96b89817cbd64a9f5cc16c17d08"
},
{
"url": "https://git.kernel.org/stable/c/6d63901dcd592a1e3f71d7c6d78f9be5e8d7eef0"
},
{
"url": "https://git.kernel.org/stable/c/a0075accbf0d76c2dad1ad3993d2e944505d99a0"
}
],
"title": "Bluetooth: Fix null-ptr-deref in l2cap_sock_resume_cb()",
"x_generator": {
"engine": "bippy-1.2.0"
}
}
},
"cveMetadata": {
"assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"assignerShortName": "Linux",
"cveId": "CVE-2025-38473",
"datePublished": "2025-07-28T11:21:34.880Z",
"dateReserved": "2025-04-16T04:51:24.021Z",
"dateUpdated": "2025-07-28T11:21:34.880Z",
"state": "PUBLISHED"
},
"dataType": "CVE_RECORD",
"dataVersion": "5.1",
"vulnerability-lookup:meta": {
"nvd": "{\"cve\":{\"id\":\"CVE-2025-38473\",\"sourceIdentifier\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"published\":\"2025-07-28T12:15:29.123\",\"lastModified\":\"2025-07-29T14:14:29.590\",\"vulnStatus\":\"Awaiting Analysis\",\"cveTags\":[],\"descriptions\":[{\"lang\":\"en\",\"value\":\"In the Linux kernel, the following vulnerability has been resolved:\\n\\nBluetooth: Fix null-ptr-deref in l2cap_sock_resume_cb()\\n\\nsyzbot reported null-ptr-deref in l2cap_sock_resume_cb(). [0]\\n\\nl2cap_sock_resume_cb() has a similar problem that was fixed by commit\\n1bff51ea59a9 (\\\"Bluetooth: fix use-after-free error in lock_sock_nested()\\\").\\n\\nSince both l2cap_sock_kill() and l2cap_sock_resume_cb() are executed\\nunder l2cap_sock_resume_cb(), we can avoid the issue simply by checking\\nif chan-\u003edata is NULL.\\n\\nLet\u0027s not access to the killed socket in l2cap_sock_resume_cb().\\n\\n[0]:\\nBUG: KASAN: null-ptr-deref in instrument_atomic_write include/linux/instrumented.h:82 [inline]\\nBUG: KASAN: null-ptr-deref in clear_bit include/asm-generic/bitops/instrumented-atomic.h:41 [inline]\\nBUG: KASAN: null-ptr-deref in l2cap_sock_resume_cb+0xb4/0x17c net/bluetooth/l2cap_sock.c:1711\\nWrite of size 8 at addr 0000000000000570 by task kworker/u9:0/52\\n\\nCPU: 1 UID: 0 PID: 52 Comm: kworker/u9:0 Not tainted 6.16.0-rc4-syzkaller-g7482bb149b9f #0 PREEMPT\\nHardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/07/2025\\nWorkqueue: hci0 hci_rx_work\\nCall trace:\\n show_stack+0x2c/0x3c arch/arm64/kernel/stacktrace.c:501 (C)\\n __dump_stack+0x30/0x40 lib/dump_stack.c:94\\n dump_stack_lvl+0xd8/0x12c lib/dump_stack.c:120\\n print_report+0x58/0x84 mm/kasan/report.c:524\\n kasan_report+0xb0/0x110 mm/kasan/report.c:634\\n check_region_inline mm/kasan/generic.c:-1 [inline]\\n kasan_check_range+0x264/0x2a4 mm/kasan/generic.c:189\\n __kasan_check_write+0x20/0x30 mm/kasan/shadow.c:37\\n instrument_atomic_write include/linux/instrumented.h:82 [inline]\\n clear_bit include/asm-generic/bitops/instrumented-atomic.h:41 [inline]\\n l2cap_sock_resume_cb+0xb4/0x17c net/bluetooth/l2cap_sock.c:1711\\n l2cap_security_cfm+0x524/0xea0 net/bluetooth/l2cap_core.c:7357\\n hci_auth_cfm include/net/bluetooth/hci_core.h:2092 [inline]\\n hci_auth_complete_evt+0x2e8/0xa4c net/bluetooth/hci_event.c:3514\\n hci_event_func net/bluetooth/hci_event.c:7511 [inline]\\n hci_event_packet+0x650/0xe9c net/bluetooth/hci_event.c:7565\\n hci_rx_work+0x320/0xb18 net/bluetooth/hci_core.c:4070\\n process_one_work+0x7e8/0x155c kernel/workqueue.c:3238\\n process_scheduled_works kernel/workqueue.c:3321 [inline]\\n worker_thread+0x958/0xed8 kernel/workqueue.c:3402\\n kthread+0x5fc/0x75c kernel/kthread.c:464\\n ret_from_fork+0x10/0x20 arch/arm64/kernel/entry.S:847\"},{\"lang\":\"es\",\"value\":\"En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: Bluetooth: Se corrige el error null-ptr-deref en l2cap_sock_resume_cb(). syzbot report\u00f3 un error null-ptr-deref en l2cap_sock_resume_cb(). [0] l2cap_sock_resume_cb() presenta un problema similar, corregido con el commit 1bff51ea59a9 (\\\"Bluetooth: Se corrige el error de use-after-free en lock_sock_nested()\\\"). Dado que tanto l2cap_sock_kill() como l2cap_sock_resume_cb() se ejecutan bajo l2cap_sock_resume_cb(), podemos evitar el problema simplemente comprobando si chan-\u0026gt;data es NULL. No se acceder\u00e1 al socket eliminado en l2cap_sock_resume_cb(). [0]: BUG: KASAN: null-ptr-deref in instrument_atomic_write include/linux/instrumented.h:82 [inline] BUG: KASAN: null-ptr-deref in clear_bit include/asm-generic/bitops/instrumented-atomic.h:41 [inline] BUG: KASAN: null-ptr-deref in l2cap_sock_resume_cb+0xb4/0x17c net/bluetooth/l2cap_sock.c:1711 Write of size 8 at addr 0000000000000570 by task kworker/u9:0/52 CPU: 1 UID: 0 PID: 52 Comm: kworker/u9:0 Not tainted 6.16.0-rc4-syzkaller-g7482bb149b9f #0 PREEMPT Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/07/2025 Workqueue: hci0 hci_rx_work Call trace: show_stack+0x2c/0x3c arch/arm64/kernel/stacktrace.c:501 (C) __dump_stack+0x30/0x40 lib/dump_stack.c:94 dump_stack_lvl+0xd8/0x12c lib/dump_stack.c:120 print_report+0x58/0x84 mm/kasan/report.c:524 kasan_report+0xb0/0x110 mm/kasan/report.c:634 check_region_inline mm/kasan/generic.c:-1 [inline] kasan_check_range+0x264/0x2a4 mm/kasan/generic.c:189 __kasan_check_write+0x20/0x30 mm/kasan/shadow.c:37 instrument_atomic_write include/linux/instrumented.h:82 [inline] clear_bit include/asm-generic/bitops/instrumented-atomic.h:41 [inline] l2cap_sock_resume_cb+0xb4/0x17c net/bluetooth/l2cap_sock.c:1711 l2cap_security_cfm+0x524/0xea0 net/bluetooth/l2cap_core.c:7357 hci_auth_cfm include/net/bluetooth/hci_core.h:2092 [inline] hci_auth_complete_evt+0x2e8/0xa4c net/bluetooth/hci_event.c:3514 hci_event_func net/bluetooth/hci_event.c:7511 [inline] hci_event_packet+0x650/0xe9c net/bluetooth/hci_event.c:7565 hci_rx_work+0x320/0xb18 net/bluetooth/hci_core.c:4070 process_one_work+0x7e8/0x155c kernel/workqueue.c:3238 process_scheduled_works kernel/workqueue.c:3321 [inline] worker_thread+0x958/0xed8 kernel/workqueue.c:3402 kthread+0x5fc/0x75c kernel/kthread.c:464 ret_from_fork+0x10/0x20 arch/arm64/kernel/entry.S:847\"}],\"metrics\":{},\"references\":[{\"url\":\"https://git.kernel.org/stable/c/6d63901dcd592a1e3f71d7c6d78f9be5e8d7eef0\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/a0075accbf0d76c2dad1ad3993d2e944505d99a0\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/ac3a8147bb24314fb3e84986590148e79f9872ec\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/b97be7ee8a1cd96b89817cbd64a9f5cc16c17d08\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/c4f16f6b071a74ac7eefe5c28985285cbbe2cd96\",\"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.
- 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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