CVE-2025-38651 (GCVE-0-2025-38651)
Vulnerability from cvelistv5
Published
2025-08-22 16:00
Modified
2025-08-22 16:00
Severity ?
VLAI Severity ?
EPSS score ?
Summary
In the Linux kernel, the following vulnerability has been resolved:
landlock: Fix warning from KUnit tests
get_id_range() expects a positive value as first argument but
get_random_u8() can return 0. Fix this by clamping it.
Validated by running the test in a for loop for 1000 times.
Note that MAX() is wrong as it is only supposed to be used for
constants, but max() is good here.
[..] ok 9 test_range2_rand1
[..] ok 10 test_range2_rand2
[..] ok 11 test_range2_rand15
[..] ------------[ cut here ]------------
[..] WARNING: CPU: 6 PID: 104 at security/landlock/id.c:99 test_range2_rand16 (security/landlock/id.c:99 (discriminator 1) security/landlock/id.c:234 (discriminator 1))
[..] Modules linked in:
[..] CPU: 6 UID: 0 PID: 104 Comm: kunit_try_catch Tainted: G N 6.16.0-rc1-dev-00001-g314a2f98b65f #1 PREEMPT(undef)
[..] Tainted: [N]=TEST
[..] Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2 04/01/2014
[..] RIP: 0010:test_range2_rand16 (security/landlock/id.c:99 (discriminator 1) security/landlock/id.c:234 (discriminator 1))
[..] Code: 49 c7 c0 10 70 30 82 4c 89 ff 48 c7 c6 a0 63 1e 83 49 c7 45 a0 e0 63 1e 83 e8 3f 95 17 00 e9 1f ff ff ff 0f 0b e9 df fd ff ff <0f> 0b ba 01 00 00 00 e9 68 fe ff ff 49 89 45 a8 49 8d 4d a0 45 31
[..] RSP: 0000:ffff888104eb7c78 EFLAGS: 00010246
[..] RAX: 0000000000000000 RBX: 000000000870822c RCX: 0000000000000000
^^^^^^^^^^^^^^^^
[..]
[..] Call Trace:
[..]
[..] ---[ end trace 0000000000000000 ]---
[..] ok 12 test_range2_rand16
[..] # landlock_id: pass:12 fail:0 skip:0 total:12
[..] # Totals: pass:12 fail:0 skip:0 total:12
[..] ok 1 landlock_id
[mic: Minor cosmetic improvements]
References
Impacted products
{
"containers": {
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"cpeApplicability": [
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"descriptions": [
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"value": "In the Linux kernel, the following vulnerability has been resolved:\n\nlandlock: Fix warning from KUnit tests\n\nget_id_range() expects a positive value as first argument but\nget_random_u8() can return 0. Fix this by clamping it.\n\nValidated by running the test in a for loop for 1000 times.\n\nNote that MAX() is wrong as it is only supposed to be used for\nconstants, but max() is good here.\n\n [..] ok 9 test_range2_rand1\n [..] ok 10 test_range2_rand2\n [..] ok 11 test_range2_rand15\n [..] ------------[ cut here ]------------\n [..] WARNING: CPU: 6 PID: 104 at security/landlock/id.c:99 test_range2_rand16 (security/landlock/id.c:99 (discriminator 1) security/landlock/id.c:234 (discriminator 1))\n [..] Modules linked in:\n [..] CPU: 6 UID: 0 PID: 104 Comm: kunit_try_catch Tainted: G N 6.16.0-rc1-dev-00001-g314a2f98b65f #1 PREEMPT(undef)\n [..] Tainted: [N]=TEST\n [..] Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2 04/01/2014\n [..] RIP: 0010:test_range2_rand16 (security/landlock/id.c:99 (discriminator 1) security/landlock/id.c:234 (discriminator 1))\n [..] Code: 49 c7 c0 10 70 30 82 4c 89 ff 48 c7 c6 a0 63 1e 83 49 c7 45 a0 e0 63 1e 83 e8 3f 95 17 00 e9 1f ff ff ff 0f 0b e9 df fd ff ff \u003c0f\u003e 0b ba 01 00 00 00 e9 68 fe ff ff 49 89 45 a8 49 8d 4d a0 45 31\n\n [..] RSP: 0000:ffff888104eb7c78 EFLAGS: 00010246\n [..] RAX: 0000000000000000 RBX: 000000000870822c RCX: 0000000000000000\n ^^^^^^^^^^^^^^^^\n [..]\n [..] Call Trace:\n [..]\n [..] ---[ end trace 0000000000000000 ]---\n [..] ok 12 test_range2_rand16\n [..] # landlock_id: pass:12 fail:0 skip:0 total:12\n [..] # Totals: pass:12 fail:0 skip:0 total:12\n [..] ok 1 landlock_id\n\n[mic: Minor cosmetic improvements]"
}
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"url": "https://git.kernel.org/stable/c/7d9ec2cfe12dd0d7c1a58213b9bef1bec66a3189"
},
{
"url": "https://git.kernel.org/stable/c/e0a69cf2c03e61bd8069becb97f66c173d0d1fa1"
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"title": "landlock: Fix warning from KUnit tests",
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"cveId": "CVE-2025-38651",
"datePublished": "2025-08-22T16:00:55.579Z",
"dateReserved": "2025-04-16T04:51:24.030Z",
"dateUpdated": "2025-08-22T16:00:55.579Z",
"state": "PUBLISHED"
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"vulnerability-lookup:meta": {
"nvd": "{\"cve\":{\"id\":\"CVE-2025-38651\",\"sourceIdentifier\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"published\":\"2025-08-22T16:15:39.907\",\"lastModified\":\"2025-08-22T18:08:51.663\",\"vulnStatus\":\"Awaiting Analysis\",\"cveTags\":[],\"descriptions\":[{\"lang\":\"en\",\"value\":\"In the Linux kernel, the following vulnerability has been resolved:\\n\\nlandlock: Fix warning from KUnit tests\\n\\nget_id_range() expects a positive value as first argument but\\nget_random_u8() can return 0. Fix this by clamping it.\\n\\nValidated by running the test in a for loop for 1000 times.\\n\\nNote that MAX() is wrong as it is only supposed to be used for\\nconstants, but max() is good here.\\n\\n [..] ok 9 test_range2_rand1\\n [..] ok 10 test_range2_rand2\\n [..] ok 11 test_range2_rand15\\n [..] ------------[ cut here ]------------\\n [..] WARNING: CPU: 6 PID: 104 at security/landlock/id.c:99 test_range2_rand16 (security/landlock/id.c:99 (discriminator 1) security/landlock/id.c:234 (discriminator 1))\\n [..] Modules linked in:\\n [..] CPU: 6 UID: 0 PID: 104 Comm: kunit_try_catch Tainted: G N 6.16.0-rc1-dev-00001-g314a2f98b65f #1 PREEMPT(undef)\\n [..] Tainted: [N]=TEST\\n [..] Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2 04/01/2014\\n [..] RIP: 0010:test_range2_rand16 (security/landlock/id.c:99 (discriminator 1) security/landlock/id.c:234 (discriminator 1))\\n [..] Code: 49 c7 c0 10 70 30 82 4c 89 ff 48 c7 c6 a0 63 1e 83 49 c7 45 a0 e0 63 1e 83 e8 3f 95 17 00 e9 1f ff ff ff 0f 0b e9 df fd ff ff \u003c0f\u003e 0b ba 01 00 00 00 e9 68 fe ff ff 49 89 45 a8 49 8d 4d a0 45 31\\n\\n [..] RSP: 0000:ffff888104eb7c78 EFLAGS: 00010246\\n [..] RAX: 0000000000000000 RBX: 000000000870822c RCX: 0000000000000000\\n ^^^^^^^^^^^^^^^^\\n [..]\\n [..] Call Trace:\\n [..]\\n [..] ---[ end trace 0000000000000000 ]---\\n [..] ok 12 test_range2_rand16\\n [..] # landlock_id: pass:12 fail:0 skip:0 total:12\\n [..] # Totals: pass:12 fail:0 skip:0 total:12\\n [..] ok 1 landlock_id\\n\\n[mic: Minor cosmetic improvements]\"}],\"metrics\":{},\"references\":[{\"url\":\"https://git.kernel.org/stable/c/127183361b69dbb7ac3246ad4726f93400481249\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/7d9ec2cfe12dd0d7c1a58213b9bef1bec66a3189\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/e0a69cf2c03e61bd8069becb97f66c173d0d1fa1\",\"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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