{"id":"CVE-2026-74335","state":"PUBLISHED","title":"bpf: Fix NULL pointer dereference in bpf_task_from_vpid()","description":"In the Linux kernel, the following vulnerability has been resolved:\n\nbpf: Fix NULL pointer dereference in bpf_task_from_vpid()\n\nbpf_task_from_vpid() looks up a task in the pid namespace of the\ncurrent task, via find_task_by_vpid():\n\n  find_task_by_vpid(vpid)\n    find_task_by_pid_ns(vpid, task_active_pid_ns(current))\n      find_pid_ns(nr, ns) -> idr_find(&ns->idr, nr)\n\ncgroup_skb programs run in softirq, which may interrupt a task that is\nitself in do_exit(). Once that task has passed\nexit_notify() -> release_task() -> __unhash_process(), its thread_pid is\ncleared, so task_active_pid_ns(current) returns NULL and find_pid_ns()\ndereferences &NULL->idr:\n\n  BUG: kernel NULL pointer dereference, address: 0000000000000050\n  RIP: 0010:idr_find+0x11/0x30 lib/idr.c:176\n  Call Trace:\n   <IRQ>\n   find_pid_ns kernel/pid.c:370 [inline]\n   find_task_by_pid_ns+0x3b/0xe0 kernel/pid.c:485\n   bpf_task_from_vpid+0x5b/0x200 kernel/bpf/helpers.c:2916\n   bpf_prog_run_array_cg+0x17e/0x530 kernel/bpf/cgroup.c:81\n   __cgroup_bpf_run_filter_skb+0x12b/0x250 kernel/bpf/cgroup.c:1612\n   sk_filter_trim_cap+0x1dc/0x4c0 net/core/filter.c:148\n   tcp_v4_rcv+0x18d1/0x2200 net/ipv4/tcp_ipv4.c:2223\n   </IRQ>\n   <TASK>\n   do_exit+0xa63/0x1270 kernel/exit.c:1010\n   get_signal+0x141c/0x1530 kernel/signal.c:3037\n\nBail out when current has no pid namespace.","publishedAt":"2026-08-15T05:58:27.148Z","updatedAt":"2026-08-17T05:17:26.885Z","severity":null,"assigner":"Linux","products":["Linux Linux"],"affected":[{"vendor":"Linux","product":"Linux","defaultStatus":"unaffected","versions":[{"version":"675c3596ff32c040d1dd2e28dd57e83e634b9f60","status":"affected","lessThan":"b7474f4432dd9559ada03b01a8cd3472cd02c61d","versionType":"git"},{"version":"675c3596ff32c040d1dd2e28dd57e83e634b9f60","status":"affected","lessThan":"a4c95b6221cb2972a94ed72663c09bd5b0b6dea4","versionType":"git"},{"version":"675c3596ff32c040d1dd2e28dd57e83e634b9f60","status":"affected","lessThan":"50dff00615522f3ec03449680ca23beb4cfc549c","versionType":"git"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["kernel/bpf/helpers.c"]},{"vendor":"Linux","product":"Linux","defaultStatus":"affected","versions":[{"version":"6.13","status":"affected"},{"version":"0","status":"unaffected","lessThan":"6.13","versionType":"semver"},{"version":"6.18.40","status":"unaffected","lessThanOrEqual":"6.18.*","versionType":"semver"},{"version":"7.1.5","status":"unaffected","lessThanOrEqual":"7.1.*","versionType":"semver"},{"version":"7.2","status":"unaffected","lessThanOrEqual":"*","versionType":"original_commit_for_fix"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["kernel/bpf/helpers.c"]}],"references":["https://git.kernel.org/stable/c/b7474f4432dd9559ada03b01a8cd3472cd02c61d","https://git.kernel.org/stable/c/a4c95b6221cb2972a94ed72663c09bd5b0b6dea4","https://git.kernel.org/stable/c/50dff00615522f3ec03449680ca23beb4cfc549c"],"weaknesses":[],"ingestedAt":"2026-10-29T20:12:58.252Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2026/74xxx/CVE-2026-74335.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-74335","state":"PUBLISHED","datePublished":"2026-08-15T05:58:27.148Z","dateUpdated":"2026-08-17T05:17:26.885Z","assignerShortName":"Linux","assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","dateReserved":"2026-08-15T05:44:03.885Z"},"containers":{"cna":{"title":"bpf: Fix NULL pointer dereference in bpf_task_from_vpid()","descriptions":[{"lang":"en","value":"In the Linux kernel, the following vulnerability has been resolved:\n\nbpf: Fix NULL pointer dereference in bpf_task_from_vpid()\n\nbpf_task_from_vpid() looks up a task in the pid namespace of the\ncurrent task, via find_task_by_vpid():\n\n  find_task_by_vpid(vpid)\n    find_task_by_pid_ns(vpid, task_active_pid_ns(current))\n      find_pid_ns(nr, ns) -> idr_find(&ns->idr, nr)\n\ncgroup_skb programs run in softirq, which may interrupt a task that is\nitself in do_exit(). Once that task has passed\nexit_notify() -> release_task() -> __unhash_process(), its thread_pid is\ncleared, so task_active_pid_ns(current) returns NULL and find_pid_ns()\ndereferences &NULL->idr:\n\n  BUG: kernel NULL pointer dereference, address: 0000000000000050\n  RIP: 0010:idr_find+0x11/0x30 lib/idr.c:176\n  Call Trace:\n   <IRQ>\n   find_pid_ns kernel/pid.c:370 [inline]\n   find_task_by_pid_ns+0x3b/0xe0 kernel/pid.c:485\n   bpf_task_from_vpid+0x5b/0x200 kernel/bpf/helpers.c:2916\n   bpf_prog_run_array_cg+0x17e/0x530 kernel/bpf/cgroup.c:81\n   __cgroup_bpf_run_filter_skb+0x12b/0x250 kernel/bpf/cgroup.c:1612\n   sk_filter_trim_cap+0x1dc/0x4c0 net/core/filter.c:148\n   tcp_v4_rcv+0x18d1/0x2200 net/ipv4/tcp_ipv4.c:2223\n   </IRQ>\n   <TASK>\n   do_exit+0xa63/0x1270 kernel/exit.c:1010\n   get_signal+0x141c/0x1530 kernel/signal.c:3037\n\nBail out when current has no pid namespace."}],"affected":[{"vendor":"Linux","product":"Linux","defaultStatus":"unaffected","versions":[{"version":"675c3596ff32c040d1dd2e28dd57e83e634b9f60","status":"affected","lessThan":"b7474f4432dd9559ada03b01a8cd3472cd02c61d","versionType":"git"},{"version":"675c3596ff32c040d1dd2e28dd57e83e634b9f60","status":"affected","lessThan":"a4c95b6221cb2972a94ed72663c09bd5b0b6dea4","versionType":"git"},{"version":"675c3596ff32c040d1dd2e28dd57e83e634b9f60","status":"affected","lessThan":"50dff00615522f3ec03449680ca23beb4cfc549c","versionType":"git"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["kernel/bpf/helpers.c"]},{"vendor":"Linux","product":"Linux","defaultStatus":"affected","versions":[{"version":"6.13","status":"affected"},{"version":"0","status":"unaffected","lessThan":"6.13","versionType":"semver"},{"version":"6.18.40","status":"unaffected","lessThanOrEqual":"6.18.*","versionType":"semver"},{"version":"7.1.5","status":"unaffected","lessThanOrEqual":"7.1.*","versionType":"semver"},{"version":"7.2","status":"unaffected","lessThanOrEqual":"*","versionType":"original_commit_for_fix"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["kernel/bpf/helpers.c"]}],"references":[{"url":"https://git.kernel.org/stable/c/b7474f4432dd9559ada03b01a8cd3472cd02c61d"},{"url":"https://git.kernel.org/stable/c/a4c95b6221cb2972a94ed72663c09bd5b0b6dea4"},{"url":"https://git.kernel.org/stable/c/50dff00615522f3ec03449680ca23beb4cfc549c"}],"providerMetadata":{"shortName":"Linux","orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","dateUpdated":"2026-08-17T05:17:26.885Z"},"cpeApplicability":[{"nodes":[{"operator":"OR","negate":false,"cpeMatch":[{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"6.13","versionEndExcluding":"6.18.40"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"6.13","versionEndExcluding":"7.1.5"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"6.13","versionEndExcluding":"7.2"}]}]}],"x_generator":{"engine":"bippy-1.2.0"}}}}}