{"id":"CVE-2025-68742","state":"PUBLISHED","title":"bpf: Fix invalid prog->stats access when update_effective_progs fails","description":"In the Linux kernel, the following vulnerability has been resolved:\n\nbpf: Fix invalid prog->stats access when update_effective_progs fails\n\nSyzkaller triggers an invalid memory access issue following fault\ninjection in update_effective_progs. The issue can be described as\nfollows:\n\n__cgroup_bpf_detach\n  update_effective_progs\n    compute_effective_progs\n      bpf_prog_array_alloc <-- fault inject\n  purge_effective_progs\n    /* change to dummy_bpf_prog */\n    array->items[index] = &dummy_bpf_prog.prog\n\n---softirq start---\n__do_softirq\n  ...\n    __cgroup_bpf_run_filter_skb\n      __bpf_prog_run_save_cb\n        bpf_prog_run\n          stats = this_cpu_ptr(prog->stats)\n          /* invalid memory access */\n          flags = u64_stats_update_begin_irqsave(&stats->syncp)\n---softirq end---\n\n  static_branch_dec(&cgroup_bpf_enabled_key[atype])\n\nThe reason is that fault injection caused update_effective_progs to fail\nand then changed the original prog into dummy_bpf_prog.prog in\npurge_effective_progs. Then a softirq came, and accessing the members of\ndummy_bpf_prog.prog in the softirq triggers invalid mem access.\n\nTo fix it, skip updating stats when stats is NULL.","publishedAt":"2025-12-24T12:09:39.341Z","updatedAt":"2026-10-15T01:10:02.989Z","severity":null,"assigner":"Linux","products":["Linux Linux"],"affected":[{"vendor":"Linux","product":"Linux","defaultStatus":"unaffected","versions":[{"version":"492ecee892c2a4ba6a14903d5d586ff750b7e805","status":"affected","lessThan":"93d1964773ff513c9bd530f7686d3e48b786fa6b","versionType":"git"},{"version":"492ecee892c2a4ba6a14903d5d586ff750b7e805","status":"affected","lessThan":"bf2c990b012100610c0f1ec5c4ea434da2d080c2","versionType":"git"},{"version":"492ecee892c2a4ba6a14903d5d586ff750b7e805","status":"affected","lessThan":"539137e3038ce6f953efd72110110f03c14c7d97","versionType":"git"},{"version":"492ecee892c2a4ba6a14903d5d586ff750b7e805","status":"affected","lessThan":"56905bb70c8b88421709bb4e32fcba617aa37d41","versionType":"git"},{"version":"492ecee892c2a4ba6a14903d5d586ff750b7e805","status":"affected","lessThan":"2579c356ccd35d06238b176e4b460978186d804b","versionType":"git"},{"version":"492ecee892c2a4ba6a14903d5d586ff750b7e805","status":"affected","lessThan":"7dc211c1159d991db609bdf4b0fb9033c04adcbc","versionType":"git"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["include/linux/filter.h","kernel/bpf/syscall.c"]},{"vendor":"Linux","product":"Linux","defaultStatus":"affected","versions":[{"version":"5.1","status":"affected"},{"version":"0","status":"unaffected","lessThan":"5.1","versionType":"semver"},{"version":"6.1.160","status":"unaffected","lessThanOrEqual":"6.1.*","versionType":"semver"},{"version":"6.6.120","status":"unaffected","lessThanOrEqual":"6.6.*","versionType":"semver"},{"version":"6.12.63","status":"unaffected","lessThanOrEqual":"6.12.*","versionType":"semver"},{"version":"6.17.13","status":"unaffected","lessThanOrEqual":"6.17.*","versionType":"semver"},{"version":"6.18.2","status":"unaffected","lessThanOrEqual":"6.18.*","versionType":"semver"},{"version":"6.19","status":"unaffected","lessThanOrEqual":"*","versionType":"original_commit_for_fix"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["include/linux/filter.h","kernel/bpf/syscall.c"]}],"references":["https://git.kernel.org/stable/c/93d1964773ff513c9bd530f7686d3e48b786fa6b","https://git.kernel.org/stable/c/bf2c990b012100610c0f1ec5c4ea434da2d080c2","https://git.kernel.org/stable/c/539137e3038ce6f953efd72110110f03c14c7d97","https://git.kernel.org/stable/c/56905bb70c8b88421709bb4e32fcba617aa37d41","https://git.kernel.org/stable/c/2579c356ccd35d06238b176e4b460978186d804b","https://git.kernel.org/stable/c/7dc211c1159d991db609bdf4b0fb9033c04adcbc","https://cert-portal.siemens.com/productcert/html/ssa-019113.html","https://cert-portal.siemens.com/productcert/html/ssa-457936.html"],"weaknesses":[],"ingestedAt":"2026-10-29T20:09:56.034Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2025/68xxx/CVE-2025-68742.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2025-68742","state":"PUBLISHED","datePublished":"2025-12-24T12:09:39.341Z","dateUpdated":"2026-10-15T01:10:02.989Z","assignerShortName":"Linux","assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","dateReserved":"2025-12-24T10:30:51.030Z"},"containers":{"cna":{"title":"bpf: Fix invalid prog->stats access when update_effective_progs fails","descriptions":[{"lang":"en","value":"In the Linux kernel, the following vulnerability has been resolved:\n\nbpf: Fix invalid prog->stats access when update_effective_progs fails\n\nSyzkaller triggers an invalid memory access issue following fault\ninjection in update_effective_progs. The issue can be described as\nfollows:\n\n__cgroup_bpf_detach\n  update_effective_progs\n    compute_effective_progs\n      bpf_prog_array_alloc <-- fault inject\n  purge_effective_progs\n    /* change to dummy_bpf_prog */\n    array->items[index] = &dummy_bpf_prog.prog\n\n---softirq start---\n__do_softirq\n  ...\n    __cgroup_bpf_run_filter_skb\n      __bpf_prog_run_save_cb\n        bpf_prog_run\n          stats = this_cpu_ptr(prog->stats)\n          /* invalid memory access */\n          flags = u64_stats_update_begin_irqsave(&stats->syncp)\n---softirq end---\n\n  static_branch_dec(&cgroup_bpf_enabled_key[atype])\n\nThe reason is that fault injection caused update_effective_progs to fail\nand then changed the original prog into dummy_bpf_prog.prog in\npurge_effective_progs. Then a softirq came, and accessing the members of\ndummy_bpf_prog.prog in the softirq triggers invalid mem access.\n\nTo fix it, skip updating stats when stats is NULL."}],"affected":[{"vendor":"Linux","product":"Linux","defaultStatus":"unaffected","versions":[{"version":"492ecee892c2a4ba6a14903d5d586ff750b7e805","status":"affected","lessThan":"93d1964773ff513c9bd530f7686d3e48b786fa6b","versionType":"git"},{"version":"492ecee892c2a4ba6a14903d5d586ff750b7e805","status":"affected","lessThan":"bf2c990b012100610c0f1ec5c4ea434da2d080c2","versionType":"git"},{"version":"492ecee892c2a4ba6a14903d5d586ff750b7e805","status":"affected","lessThan":"539137e3038ce6f953efd72110110f03c14c7d97","versionType":"git"},{"version":"492ecee892c2a4ba6a14903d5d586ff750b7e805","status":"affected","lessThan":"56905bb70c8b88421709bb4e32fcba617aa37d41","versionType":"git"},{"version":"492ecee892c2a4ba6a14903d5d586ff750b7e805","status":"affected","lessThan":"2579c356ccd35d06238b176e4b460978186d804b","versionType":"git"},{"version":"492ecee892c2a4ba6a14903d5d586ff750b7e805","status":"affected","lessThan":"7dc211c1159d991db609bdf4b0fb9033c04adcbc","versionType":"git"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["include/linux/filter.h","kernel/bpf/syscall.c"]},{"vendor":"Linux","product":"Linux","defaultStatus":"affected","versions":[{"version":"5.1","status":"affected"},{"version":"0","status":"unaffected","lessThan":"5.1","versionType":"semver"},{"version":"6.1.160","status":"unaffected","lessThanOrEqual":"6.1.*","versionType":"semver"},{"version":"6.6.120","status":"unaffected","lessThanOrEqual":"6.6.*","versionType":"semver"},{"version":"6.12.63","status":"unaffected","lessThanOrEqual":"6.12.*","versionType":"semver"},{"version":"6.17.13","status":"unaffected","lessThanOrEqual":"6.17.*","versionType":"semver"},{"version":"6.18.2","status":"unaffected","lessThanOrEqual":"6.18.*","versionType":"semver"},{"version":"6.19","status":"unaffected","lessThanOrEqual":"*","versionType":"original_commit_for_fix"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["include/linux/filter.h","kernel/bpf/syscall.c"]}],"references":[{"url":"https://git.kernel.org/stable/c/93d1964773ff513c9bd530f7686d3e48b786fa6b"},{"url":"https://git.kernel.org/stable/c/bf2c990b012100610c0f1ec5c4ea434da2d080c2"},{"url":"https://git.kernel.org/stable/c/539137e3038ce6f953efd72110110f03c14c7d97"},{"url":"https://git.kernel.org/stable/c/56905bb70c8b88421709bb4e32fcba617aa37d41"},{"url":"https://git.kernel.org/stable/c/2579c356ccd35d06238b176e4b460978186d804b"},{"url":"https://git.kernel.org/stable/c/7dc211c1159d991db609bdf4b0fb9033c04adcbc"}],"providerMetadata":{"shortName":"Linux","orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","dateUpdated":"2026-05-11T21:52:28.112Z"},"cpeApplicability":[{"nodes":[{"operator":"OR","negate":false,"cpeMatch":[{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.1","versionEndExcluding":"6.1.160"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.1","versionEndExcluding":"6.6.120"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.1","versionEndExcluding":"6.12.63"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.1","versionEndExcluding":"6.17.13"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.1","versionEndExcluding":"6.18.2"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.1","versionEndExcluding":"6.19"}]}]}],"x_generator":{"engine":"bippy-1.2.0"}},"adp":[{"affected":[{"vendor":"Siemens","product":"SIMATIC 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