{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2024-58100","assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","state":"PUBLISHED","assignerShortName":"Linux","dateReserved":"2025-03-06T15:52:09.189Z","datePublished":"2025-05-05T14:53:33.445Z","dateUpdated":"2026-08-05T11:47:45.942Z"},"containers":{"cna":{"providerMetadata":{"orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","shortName":"Linux","dateUpdated":"2026-08-05T11:47:45.942Z"},"descriptions":[{"lang":"en","value":"In the Linux kernel, the following vulnerability has been resolved:\n\nbpf: check changes_pkt_data property for extension programs\n\nWhen processing calls to global sub-programs, verifier decides whether\nto invalidate all packet pointers in current state depending on the\nchanges_pkt_data property of the global sub-program.\n\nBecause of this, an extension program replacing a global sub-program\nmust be compatible with changes_pkt_data property of the sub-program\nbeing replaced.\n\nThis commit:\n- adds changes_pkt_data flag to struct bpf_prog_aux:\n  - this flag is set in check_cfg() for main sub-program;\n  - in jit_subprogs() for other sub-programs;\n- modifies bpf_check_attach_btf_id() to check changes_pkt_data flag;\n- moves call to check_attach_btf_id() after the call to check_cfg(),\n  because it needs changes_pkt_data flag to be set:\n\n    bpf_check:\n      ...                             ...\n    - check_attach_btf_id             resolve_pseudo_ldimm64\n      resolve_pseudo_ldimm64   -->    bpf_prog_is_offloaded\n      bpf_prog_is_offloaded           check_cfg\n      check_cfg                     + check_attach_btf_id\n      ...                             ...\n\nThe following fields are set by check_attach_btf_id():\n- env->ops\n- prog->aux->attach_btf_trace\n- prog->aux->attach_func_name\n- prog->aux->attach_func_proto\n- prog->aux->dst_trampoline\n- prog->aux->mod\n- prog->aux->saved_dst_attach_type\n- prog->aux->saved_dst_prog_type\n- prog->expected_attach_type\n\nNeither of these fields are used by resolve_pseudo_ldimm64() or\nbpf_prog_offload_verifier_prep() (for netronome and netdevsim\ndrivers), so the reordering is safe."}],"metrics":[{"cvssV3_1":{"version":"3.1","vectorString":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","baseScore":7.8,"baseSeverity":"HIGH"},"scenarios":[{"lang":"en","value":"AV:L - The attack requires loading a tc/XDP program and an freplace extension program through the local bpf() syscall; a remote peer cannot supply BPF bytecode. Although the corrupting store fires when a packet traverses the tc/XDP hook, the vulnerable path is entered locally.\nAC:L - Exploitation is fully deterministic — load a global subprog that does not touch packet data, replace it via freplace with one calling bpf_skb_pull_data(), and the caller's stale packet pointer is used unconditionally on the next packet. No race and no uncontrolled memory-layout condition is involved.\nPR:L - BPF_PROG_TYPE_EXT is a net-admin prog type requiring CAP_BPF+CAP_NET_ADMIN, but these are routinely delegated into user namespaces via BPF tokens (BPF_F_TOKEN_FD) and are held by ordinary eBPF-based container networking workloads, so the attacker need not be root on the host.\nUI:N - The attacker loads and attaches both programs and can generate the triggering packet themselves (e.g. over loopback). No victim action is required.\nS:U - The corrupted memory is kernel heap belonging to the same kernel security authority; this is a standard local privilege escalation, not a VM/IOMMU boundary crossing.\nC:H - The stale packet pointer reads freed/reallocated slab memory beyond the packet, and the BPF program can copy that data into a map readable from userspace, giving an arbitrary kernel-heap disclosure primitive.\nI:H - Direct packet stores through the stale pointer become use-after-free (or out-of-bounds, with skb_change_tail/xdp_adjust_tail) writes at an attacker-chosen offset with an attacker-chosen value — an arbitrary kernel write suitable for control-flow hijacking and privilege escalation.\nA:H - Writing into a freed skb head corrupts slab metadata and neighbouring objects, reliably producing kernel oops/panic even when full exploitation is not achieved."}]}],"affected":[{"product":"Linux","vendor":"Linux","defaultStatus":"unaffected","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["include/linux/bpf.h","kernel/bpf/verifier.c"],"versions":[{"version":"be8704ff07d2374bcc5c675526f95e70c6459683","lessThan":"7197fc4acdf238ec8ad06de5a8235df0c1f9c7d7","status":"affected","versionType":"git"},{"version":"be8704ff07d2374bcc5c675526f95e70c6459683","lessThan":"3846e2bea565ee1c5195dcc625fda9868fb0e3b3","status":"affected","versionType":"git"},{"version":"be8704ff07d2374bcc5c675526f95e70c6459683","lessThan":"81f6d0530ba031b5f038a091619bf2ff29568852","status":"affected","versionType":"git"}]},{"product":"Linux","vendor":"Linux","defaultStatus":"affected","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["include/linux/bpf.h","kernel/bpf/verifier.c"],"versions":[{"version":"5.6","status":"affected"},{"version":"0","lessThan":"5.6","status":"unaffected","versionType":"semver"},{"version":"6.6.90","lessThanOrEqual":"6.6.*","status":"unaffected","versionType":"semver"},{"version":"6.12.25","lessThanOrEqual":"6.12.*","status":"unaffected","versionType":"semver"},{"version":"6.13","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":"5.6","versionEndExcluding":"6.6.90"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.6","versionEndExcluding":"6.12.25"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.6","versionEndExcluding":"6.13"}]}]}],"references":[{"url":"https://git.kernel.org/stable/c/7197fc4acdf238ec8ad06de5a8235df0c1f9c7d7"},{"url":"https://git.kernel.org/stable/c/3846e2bea565ee1c5195dcc625fda9868fb0e3b3"},{"url":"https://git.kernel.org/stable/c/81f6d0530ba031b5f038a091619bf2ff29568852"}],"title":"bpf: check changes_pkt_data property for extension programs","x_generator":{"engine":"bippy-1.2.0"}}}}