{ "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" } } } }