{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-74477", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2026-08-15T05:44:03.903Z", "datePublished": "2026-08-15T12:27:11.938Z", "dateUpdated": "2026-08-15T12:27:11.938Z"}, "containers": {"cna": {"providerMetadata": {"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-08-15T12:27:11.938Z"}, "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nuprobes: Fix NULL pointer dereference in hprobe_expire()\n\nForking a task that has a pending uretprobe can oops the kernel with a\nNULL pointer dereference in the clone() path:\n\n BUG: kernel NULL pointer dereference, address: 0000000000000018\n Oops: 0002 [#1] SMP NOPTI\n RIP: 0010:hprobe_expire\n CR2: 0000000000000018\n Call Trace:\n uprobe_copy_process\n copy_process\n kernel_clone\n __x64_sys_clone\n do_syscall_64\n entry_SYSCALL_64_after_hwframe\n\nThis was found on real hosts on Meta fleet.\n\nI've got the impression that this is what is happening:\n\n CPU 1 CPU 2 (traced task)\n ----- -------------------\n hit uprobe, prepare_uretprobe():\n hprobe LEASED, refcount >= 1\n uprobe_unregister()\n put_uprobe(): refcount -> 0\n fork() -> dup_utask()\n hprobe_expire(hprobe, true)\n try_get_uprobe() -> NULL\n get_uprobe(NULL) <-- Oops\n\nOnly take the extra reference when the uprobe is non-NULL; a NULL means\nit is gone and is the correct value to return."}], "affected": [{"product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["kernel/events/uprobes.c"], "versions": [{"version": "dd1a7567784e2b1f80258be04f57bcfa82c997eb", "lessThan": "3bd35a5e272a1b7a3fb43acad9bdc599281b13fa", "status": "affected", "versionType": "git"}, {"version": "dd1a7567784e2b1f80258be04f57bcfa82c997eb", "lessThan": "06c275a6c0a953ef1d763d11a6891fcc69ae2ac0", "status": "affected", "versionType": "git"}, {"version": "dd1a7567784e2b1f80258be04f57bcfa82c997eb", "lessThan": "cc679d7a6303e84d769f2afcde1fc51c51f127cd", "status": "affected", "versionType": "git"}]}, {"product": "Linux", "vendor": "Linux", "defaultStatus": "affected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["kernel/events/uprobes.c"], "versions": [{"version": "6.13", "status": "affected"}, {"version": "0", "lessThan": "6.13", "status": "unaffected", "versionType": "semver"}, {"version": "6.18.44", "lessThanOrEqual": "6.18.*", "status": "unaffected", "versionType": "semver"}, {"version": "7.1.8", "lessThanOrEqual": "7.1.*", "status": "unaffected", "versionType": "semver"}, {"version": "7.2-rc6", "lessThanOrEqual": "*", "status": "unaffected", "versionType": "original_commit_for_fix"}]}], "cpeApplicability": [{"nodes": [{"operator": "OR", "negate": false, "cpeMatch": [{"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.13", "versionEndExcluding": "6.18.44"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.13", "versionEndExcluding": "7.1.8"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.13", "versionEndExcluding": "7.2-rc6"}]}]}], "references": [{"url": "https://git.kernel.org/stable/c/3bd35a5e272a1b7a3fb43acad9bdc599281b13fa"}, {"url": "https://git.kernel.org/stable/c/06c275a6c0a953ef1d763d11a6891fcc69ae2ac0"}, {"url": "https://git.kernel.org/stable/c/cc679d7a6303e84d769f2afcde1fc51c51f127cd"}], "title": "uprobes: Fix NULL pointer dereference in hprobe_expire()", "x_generator": {"engine": "bippy-1.2.0"}}}}

{}

{"affected": [{"affectedData": [{"defaultStatus": "unaffected", "product": "Linux", "programFiles": ["kernel/events/uprobes.c"], "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "versions": [{"lessThan": "3bd35a5e272a1b7a3fb43acad9bdc599281b13fa", "status": "affected", "version": "dd1a7567784e2b1f80258be04f57bcfa82c997eb", "versionType": "git"}, {"lessThan": "06c275a6c0a953ef1d763d11a6891fcc69ae2ac0", "status": "affected", "version": "dd1a7567784e2b1f80258be04f57bcfa82c997eb", "versionType": "git"}, {"lessThan": "cc679d7a6303e84d769f2afcde1fc51c51f127cd", "status": "affected", "version": "dd1a7567784e2b1f80258be04f57bcfa82c997eb", "versionType": "git"}]}, {"defaultStatus": "affected", "product": "Linux", "programFiles": ["kernel/events/uprobes.c"], "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "versions": [{"status": "affected", "version": "6.13"}, {"lessThan": "6.13", "status": "unaffected", "version": "0", "versionType": "semver"}, {"lessThanOrEqual": "6.18.*", "status": "unaffected", "version": "6.18.44", "versionType": "semver"}, {"lessThanOrEqual": "7.1.*", "status": "unaffected", "version": "7.1.8", "versionType": "semver"}, {"lessThanOrEqual": "*", "status": "unaffected", "version": "7.2-rc6", "versionType": "original_commit_for_fix"}]}], "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}], "cveTags": [], "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nuprobes: Fix NULL pointer dereference in hprobe_expire()\n\nForking a task that has a pending uretprobe can oops the kernel with a\nNULL pointer dereference in the clone() path:\n\n BUG: kernel NULL pointer dereference, address: 0000000000000018\n Oops: 0002 [#1] SMP NOPTI\n RIP: 0010:hprobe_expire\n CR2: 0000000000000018\n Call Trace:\n uprobe_copy_process\n copy_process\n kernel_clone\n __x64_sys_clone\n do_syscall_64\n entry_SYSCALL_64_after_hwframe\n\nThis was found on real hosts on Meta fleet.\n\nI've got the impression that this is what is happening:\n\n CPU 1 CPU 2 (traced task)\n ----- -------------------\n hit uprobe, prepare_uretprobe():\n hprobe LEASED, refcount >= 1\n uprobe_unregister()\n put_uprobe(): refcount -> 0\n fork() -> dup_utask()\n hprobe_expire(hprobe, true)\n try_get_uprobe() -> NULL\n get_uprobe(NULL) <-- Oops\n\nOnly take the extra reference when the uprobe is non-NULL; a NULL means\nit is gone and is the correct value to return."}], "id": "CVE-2026-74477", "lastModified": "2026-08-15T13:17:52.497", "metrics": {}, "published": "2026-08-15T13:17:52.497", "references": [{"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/06c275a6c0a953ef1d763d11a6891fcc69ae2ac0"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/3bd35a5e272a1b7a3fb43acad9bdc599281b13fa"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/cc679d7a6303e84d769f2afcde1fc51c51f127cd"}], "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "vulnStatus": "Received"}

{}

{}