{"id":"CVE-2025-38651","state":"PUBLISHED","title":"landlock: Fix warning from KUnit tests","description":"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 <0f> 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]","publishedAt":"2025-08-22T16:00:55.579Z","updatedAt":"2026-05-11T21:32:20.523Z","severity":null,"assigner":"Linux","products":["Linux Linux"],"affected":[{"vendor":"Linux","product":"Linux","defaultStatus":"unaffected","versions":[{"version":"d9d2a68ed44bbae598a81cb95e0746fa6b13b57f","status":"affected","lessThan":"127183361b69dbb7ac3246ad4726f93400481249","versionType":"git"},{"version":"d9d2a68ed44bbae598a81cb95e0746fa6b13b57f","status":"affected","lessThan":"7d9ec2cfe12dd0d7c1a58213b9bef1bec66a3189","versionType":"git"},{"version":"d9d2a68ed44bbae598a81cb95e0746fa6b13b57f","status":"affected","lessThan":"e0a69cf2c03e61bd8069becb97f66c173d0d1fa1","versionType":"git"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["security/landlock/id.c"]},{"vendor":"Linux","product":"Linux","defaultStatus":"affected","versions":[{"version":"6.15","status":"affected"},{"version":"0","status":"unaffected","lessThan":"6.15","versionType":"semver"},{"version":"6.15.10","status":"unaffected","lessThanOrEqual":"6.15.*","versionType":"semver"},{"version":"6.16.1","status":"unaffected","lessThanOrEqual":"6.16.*","versionType":"semver"},{"version":"6.17","status":"unaffected","lessThanOrEqual":"*","versionType":"original_commit_for_fix"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["security/landlock/id.c"]}],"references":["https://git.kernel.org/stable/c/127183361b69dbb7ac3246ad4726f93400481249","https://git.kernel.org/stable/c/7d9ec2cfe12dd0d7c1a58213b9bef1bec66a3189","https://git.kernel.org/stable/c/e0a69cf2c03e61bd8069becb97f66c173d0d1fa1"],"weaknesses":[],"ingestedAt":"2026-10-29T20:09:09.358Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2025/38xxx/CVE-2025-38651.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2025-38651","state":"PUBLISHED","datePublished":"2025-08-22T16:00:55.579Z","dateUpdated":"2026-05-11T21:32:20.523Z","assignerShortName":"Linux","assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","dateReserved":"2025-04-16T04:51:24.030Z"},"containers":{"cna":{"title":"landlock: Fix warning from KUnit tests","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 <0f> 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]"}],"affected":[{"vendor":"Linux","product":"Linux","defaultStatus":"unaffected","versions":[{"version":"d9d2a68ed44bbae598a81cb95e0746fa6b13b57f","status":"affected","lessThan":"127183361b69dbb7ac3246ad4726f93400481249","versionType":"git"},{"version":"d9d2a68ed44bbae598a81cb95e0746fa6b13b57f","status":"affected","lessThan":"7d9ec2cfe12dd0d7c1a58213b9bef1bec66a3189","versionType":"git"},{"version":"d9d2a68ed44bbae598a81cb95e0746fa6b13b57f","status":"affected","lessThan":"e0a69cf2c03e61bd8069becb97f66c173d0d1fa1","versionType":"git"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["security/landlock/id.c"]},{"vendor":"Linux","product":"Linux","defaultStatus":"affected","versions":[{"version":"6.15","status":"affected"},{"version":"0","status":"unaffected","lessThan":"6.15","versionType":"semver"},{"version":"6.15.10","status":"unaffected","lessThanOrEqual":"6.15.*","versionType":"semver"},{"version":"6.16.1","status":"unaffected","lessThanOrEqual":"6.16.*","versionType":"semver"},{"version":"6.17","status":"unaffected","lessThanOrEqual":"*","versionType":"original_commit_for_fix"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["security/landlock/id.c"]}],"references":[{"url":"https://git.kernel.org/stable/c/127183361b69dbb7ac3246ad4726f93400481249"},{"url":"https://git.kernel.org/stable/c/7d9ec2cfe12dd0d7c1a58213b9bef1bec66a3189"},{"url":"https://git.kernel.org/stable/c/e0a69cf2c03e61bd8069becb97f66c173d0d1fa1"}],"providerMetadata":{"shortName":"Linux","orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","dateUpdated":"2026-05-11T21:32:20.523Z"},"cpeApplicability":[{"nodes":[{"operator":"OR","negate":false,"cpeMatch":[{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"6.15","versionEndExcluding":"6.15.10"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"6.15","versionEndExcluding":"6.16.1"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"6.15","versionEndExcluding":"6.17"}]}]}],"x_generator":{"engine":"bippy-1.2.0"}}}}}