{ "schema_version": "1.6.1", "id": "RPI-CVE-2024-26925", "modified": "2026-10-09T11:39:44Z", "upstream": [ "CVE-2024-26925" ], "published": "2024-04-24T21:49:27Z", "summary": "netfilter: nf_tables: release mutex after nft_gc_seq_end from abort path", "details": "In the Linux kernel, the following vulnerability has been resolved:\n\nnetfilter: nf_tables: release mutex after nft_gc_seq_end from abort path\n\nThe commit mutex should not be released during the critical section\nbetween nft_gc_seq_begin() and nft_gc_seq_end(), otherwise, async GC\nworker could collect expired objects and get the released commit lock\nwithin the same GC sequence.\n\nnf_tables_module_autoload() temporarily releases the mutex to load\nmodule dependencies, then it goes back to replay the transaction again.\nMove it at the end of the abort phase after nft_gc_seq_end() is called.", "severity": [ { "type": "CVSS_V3", "score": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H" } ], "affected": [ { "package": { "ecosystem": "Raspberry Pi OS:12", "name": "linux" }, "versions": [ "1:6.1.58-1+rpt2", "1:6.1.63-1+rpt1", "1:6.1.73-1+rpt1", "1:6.6.20-1+rpt1" ], "ecosystem_specific": { "binaries": [ { "binary_name": "linux-image-6.1.0-rpi6-rpi-2712", "binary_version": "1:6.1.58-1+rpt2" }, { "binary_name": "linux-image-6.1.0-rpi6-rpi-v6", "binary_version": "1:6.1.58-1+rpt2" }, { "binary_name": "linux-image-6.1.0-rpi6-rpi-v7", "binary_version": "1:6.1.58-1+rpt2" }, { "binary_name": "linux-image-6.1.0-rpi6-rpi-v7l", "binary_version": "1:6.1.58-1+rpt2" }, { "binary_name": "linux-image-6.1.0-rpi6-rpi-v8", "binary_version": "1:6.1.58-1+rpt2" }, { "binary_name": "linux-image-6.1.0-rpi7-rpi-2712", "binary_version": "1:6.1.63-1+rpt1" }, { "binary_name": "linux-image-6.1.0-rpi7-rpi-v6", "binary_version": "1:6.1.63-1+rpt1" }, { "binary_name": "linux-image-6.1.0-rpi7-rpi-v7", "binary_version": "1:6.1.63-1+rpt1" }, { "binary_name": "linux-image-6.1.0-rpi7-rpi-v7l", "binary_version": "1:6.1.63-1+rpt1" }, { "binary_name": "linux-image-6.1.0-rpi7-rpi-v8", "binary_version": "1:6.1.63-1+rpt1" }, { "binary_name": "linux-image-6.1.0-rpi8-rpi-2712", "binary_version": "1:6.1.73-1+rpt1" }, { "binary_name": "linux-image-6.1.0-rpi8-rpi-v6", "binary_version": "1:6.1.73-1+rpt1" }, { "binary_name": "linux-image-6.1.0-rpi8-rpi-v7", "binary_version": "1:6.1.73-1+rpt1" }, { "binary_name": "linux-image-6.1.0-rpi8-rpi-v7l", "binary_version": "1:6.1.73-1+rpt1" }, { "binary_name": "linux-image-6.1.0-rpi8-rpi-v8", "binary_version": "1:6.1.73-1+rpt1" }, { "binary_name": "linux-image-6.6.20+rpt-rpi-2712", "binary_version": "1:6.6.20-1+rpt1" }, { "binary_name": "linux-image-6.6.20+rpt-rpi-v6", "binary_version": "1:6.6.20-1+rpt1" }, { "binary_name": "linux-image-6.6.20+rpt-rpi-v7", "binary_version": "1:6.6.20-1+rpt1" }, { "binary_name": "linux-image-6.6.20+rpt-rpi-v7l", "binary_version": "1:6.6.20-1+rpt1" }, { "binary_name": "linux-image-6.6.20+rpt-rpi-v8", "binary_version": "1:6.6.20-1+rpt1" } ] }, "database_specific": { "per_version": { "1:6.1.58-1+rpt2": { "linux_commit": "ccf1586ad0663fa91238ac56abf6340d6d740d18", "upstream_version": "6.1.58", "assessment": "commit ancestry (strak rule)", "upstream_fixed": "6.1.86" }, "1:6.1.63-1+rpt1": { "linux_commit": null, "upstream_version": "6.1.63", "assessment": "upstream version (no usable Linux commit)", "upstream_fixed": "6.1.86" }, "1:6.1.73-1+rpt1": { "linux_commit": null, "upstream_version": "6.1.73", "assessment": "upstream version (no usable Linux commit)", "upstream_fixed": "6.1.86" }, "1:6.6.20-1+rpt1": { "linux_commit": "6f16847710cc0502450788b9f12f0a14d3429668", "upstream_version": "6.6.20", "assessment": "commit ancestry (strak rule)", "upstream_fixed": "6.6.26" } } } } ], "references": [ { "type": "ADVISORY", "url": "https://www.cve.org/CVERecord?id=CVE-2024-26925" }, { "type": "FIX", "url": "https://git.kernel.org/stable/c/61ac7284346c32f9a8c8ceac56102f7914060428" }, { "type": "FIX", "url": "https://git.kernel.org/stable/c/2cee2ff7f8cce12a63a0a23ffe27f08d99541494" }, { "type": "FIX", "url": "https://git.kernel.org/stable/c/eb769ff4e281f751adcaf4f4445cbf30817be139" }, { "type": "FIX", "url": "https://git.kernel.org/stable/c/8d3a58af50e46167b6f1db47adadad03c0045dae" }, { "type": "FIX", "url": "https://git.kernel.org/stable/c/8038ee3c3e5b59bcd78467686db5270c68544e30" }, { "type": "FIX", "url": "https://git.kernel.org/stable/c/a34ba4bdeec0c3b629160497594908dc820110f1" }, { "type": "FIX", "url": "https://git.kernel.org/stable/c/0d459e2ffb541841714839e8228b845458ed3b27" } ], "database_specific": { "source": "https://git.kernel.org/pub/scm/linux/security/vulns.git", "upstream_modified": "2026-08-05T11:52:36Z", "severity": { "source": "kernel CNA", "cvss_v3_score": 7.8, "cvss_v3_severity": "High", "scenario": "AV:L - The vulnerability is reached through the nfnetlink/nf_tables netlink socket interface (`NFNL_SUBSYS_NFTABLES` batch processing), which requires a local process on the system. No remote packet path reaches the abort/GC transaction code.\nAC:L - The attacker controls both sides of the race: they choose when to force the `NFNL_ABORT_AUTOLOAD` path (by referencing an unloaded expression module), can queue many `request_module()` requests to stretch the mutex-released window to milliseconds of usermode-helper execution, and schedule the async GC worker precisely via attacker-settable `NFTA_SET_GC_INTERVAL` and element timeouts.\nPR:L - `nfnetlink_rcv()` checks `netlink_net_capable(skb, CAP_NET_ADMIN)`, evaluated against the network namespace's owning user namespace, so an entirely unprivileged user obtains it with `unshare -Urn` on default Ubuntu/Debian/Fedora/Arch/Android configurations. Only basic local user access is needed.\nUI:N - The attacker drives the entire sequence from its own process by submitting nftables batches and configuring set timeouts; no action by any other user or administrator is required.\nS:U - The corruption is confined to kernel heap memory and results in privilege escalation within the same host security authority, with no crossing of a VM, IOMMU, or hypervisor boundary.\nC:H - The GC worker reads and dereferences already-freed `nft_set_ext` elements (`nft_setelem_data_deactivate`, backend `remove`), and the double free of an attacker-size-controlled slab object allows reclaiming it with a readable structure to disclose arbitrary kernel memory.\nI:H - The double free plus UAF write into the rhashtable/rbtree/pipapo backend gives a general slab-corruption primitive on attacker-sized allocations \u2014 the same class of nftables element double-free that has yielded reliable arbitrary-write root escalation (CVE-2024-1086, CVE-2023-32233).\nA:H - Even unweaponized, the use-after-free and double free trigger slab/list corruption, `BUG_ON`, and kernel panic, and the attacker can repeat the trigger at will to reliably crash the machine." } } }