{"id":"CVE-2026-23451","state":"PUBLISHED","title":"bonding: prevent potential infinite loop in bond_header_parse()","description":"In the Linux kernel, the following vulnerability has been resolved:\n\nbonding: prevent potential infinite loop in bond_header_parse()\n\nbond_header_parse() can loop if a stack of two bonding devices is setup,\nbecause skb->dev always points to the hierarchy top.\n\nAdd new \"const struct net_device *dev\" parameter to\n(struct header_ops)->parse() method to make sure the recursion\nis bounded, and that the final leaf parse method is called.","publishedAt":"2026-04-03T15:15:33.776Z","updatedAt":"2026-10-30T12:24:07.666Z","severity":{"score":7.5,"label":"High","version":"3.1","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","source":"Linux"},"assigner":"Linux","products":["Linux Linux"],"affected":[{"vendor":"Linux","product":"Linux","defaultStatus":"unaffected","versions":[{"version":"5d0fb9806ab6cf2c3cfba0e1b8c701da65e25af8","status":"affected","lessThan":"9532d0d0ad1d726c06f807e8f0f1ec93cbabb452","versionType":"git"},{"version":"9baf26a91565b7bb2b1d9f99aaf884a2b28c2f6d","status":"affected","lessThan":"946bb6cacf0ccada7bc80f1cfa07c1ed79511c1c","versionType":"git"},{"version":"6ac890f1d60ac3707ee8dae15a67d9a833e49956","status":"affected","lessThan":"4172a7901cf43fe1cc63ef7a2ef33735ff7b7d13","versionType":"git"},{"version":"95597d11dc8bddb2b9a051c9232000bfbb5e43ba","status":"affected","lessThan":"9b49c854f14f5e2d493e562a1e28d2e57fe37371","versionType":"git"},{"version":"950803f7254721c1c15858fbbfae3deaaeeecb11","status":"affected","lessThan":"b7405dcf7385445e10821777143f18c3ce20fa04","versionType":"git"},{"version":"b1f22a658a7b20bcb7d34d40cb2ef3e52847e2fb","status":"affected","versionType":"git"},{"version":"6.1.191","status":"affected","lessThan":"6.2","versionType":"semver"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/firewire/net.c","drivers/net/bonding/bond_main.c","include/linux/etherdevice.h","include/linux/if_ether.h","include/linux/netdevice.h","net/ethernet/eth.c","net/ipv4/ip_gre.c","net/mac802154/iface.c","net/phonet/af_phonet.c"]},{"vendor":"Linux","product":"Linux","defaultStatus":"unaffected","versions":[{"version":"6.18.19","status":"affected","lessThan":"6.18.20","versionType":"semver"},{"version":"6.19.9","status":"affected","lessThan":"6.19.10","versionType":"semver"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/firewire/net.c","drivers/net/bonding/bond_main.c","include/linux/etherdevice.h","include/linux/if_ether.h","include/linux/netdevice.h","net/ethernet/eth.c","net/ipv4/ip_gre.c","net/mac802154/iface.c","net/phonet/af_phonet.c"]}],"references":["https://git.kernel.org/stable/c/9532d0d0ad1d726c06f807e8f0f1ec93cbabb452","https://git.kernel.org/stable/c/946bb6cacf0ccada7bc80f1cfa07c1ed79511c1c","https://git.kernel.org/stable/c/4172a7901cf43fe1cc63ef7a2ef33735ff7b7d13","https://git.kernel.org/stable/c/9b49c854f14f5e2d493e562a1e28d2e57fe37371","https://git.kernel.org/stable/c/b7405dcf7385445e10821777143f18c3ce20fa04"],"weaknesses":[],"ingestedAt":"2026-10-30T12:40:04.423Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2026/23xxx/CVE-2026-23451.json","commit":"db8103c5921aac81d5d90efcf3745980dafabf49","baselineCommit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-23451","state":"PUBLISHED","datePublished":"2026-04-03T15:15:33.776Z","dateUpdated":"2026-10-30T12:24:07.666Z","assignerShortName":"Linux","assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","dateReserved":"2026-01-13T15:37:46.020Z"},"containers":{"cna":{"title":"bonding: prevent potential infinite loop in bond_header_parse()","descriptions":[{"lang":"en","value":"In the Linux kernel, the following vulnerability has been resolved:\n\nbonding: prevent potential infinite loop in bond_header_parse()\n\nbond_header_parse() can loop if a stack of two bonding devices is setup,\nbecause skb->dev always points to the hierarchy top.\n\nAdd new \"const struct net_device *dev\" parameter to\n(struct header_ops)->parse() method to make sure the recursion\nis bounded, and that the final leaf parse method is called."}],"affected":[{"vendor":"Linux","product":"Linux","defaultStatus":"unaffected","versions":[{"version":"5d0fb9806ab6cf2c3cfba0e1b8c701da65e25af8","status":"affected","lessThan":"9532d0d0ad1d726c06f807e8f0f1ec93cbabb452","versionType":"git"},{"version":"9baf26a91565b7bb2b1d9f99aaf884a2b28c2f6d","status":"affected","lessThan":"946bb6cacf0ccada7bc80f1cfa07c1ed79511c1c","versionType":"git"},{"version":"6ac890f1d60ac3707ee8dae15a67d9a833e49956","status":"affected","lessThan":"4172a7901cf43fe1cc63ef7a2ef33735ff7b7d13","versionType":"git"},{"version":"95597d11dc8bddb2b9a051c9232000bfbb5e43ba","status":"affected","lessThan":"9b49c854f14f5e2d493e562a1e28d2e57fe37371","versionType":"git"},{"version":"950803f7254721c1c15858fbbfae3deaaeeecb11","status":"affected","lessThan":"b7405dcf7385445e10821777143f18c3ce20fa04","versionType":"git"},{"version":"b1f22a658a7b20bcb7d34d40cb2ef3e52847e2fb","status":"affected","versionType":"git"},{"version":"6.1.191","status":"affected","lessThan":"6.2","versionType":"semver"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/firewire/net.c","drivers/net/bonding/bond_main.c","include/linux/etherdevice.h","include/linux/if_ether.h","include/linux/netdevice.h","net/ethernet/eth.c","net/ipv4/ip_gre.c","net/mac802154/iface.c","net/phonet/af_phonet.c"]},{"vendor":"Linux","product":"Linux","defaultStatus":"unaffected","versions":[{"version":"6.18.19","status":"affected","lessThan":"6.18.20","versionType":"semver"},{"version":"6.19.9","status":"affected","lessThan":"6.19.10","versionType":"semver"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/firewire/net.c","drivers/net/bonding/bond_main.c","include/linux/etherdevice.h","include/linux/if_ether.h","include/linux/netdevice.h","net/ethernet/eth.c","net/ipv4/ip_gre.c","net/mac802154/iface.c","net/phonet/af_phonet.c"]}],"references":[{"url":"https://git.kernel.org/stable/c/9532d0d0ad1d726c06f807e8f0f1ec93cbabb452"},{"url":"https://git.kernel.org/stable/c/946bb6cacf0ccada7bc80f1cfa07c1ed79511c1c"},{"url":"https://git.kernel.org/stable/c/4172a7901cf43fe1cc63ef7a2ef33735ff7b7d13"},{"url":"https://git.kernel.org/stable/c/9b49c854f14f5e2d493e562a1e28d2e57fe37371"},{"url":"https://git.kernel.org/stable/c/b7405dcf7385445e10821777143f18c3ce20fa04"}],"metrics":[{"cvssV3_1":{"version":"3.1","vectorString":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","baseScore":7.5,"baseSeverity":"HIGH"},"scenarios":[{"lang":"en","value":"AV:N - In a reasonable affected deployment, a remote peer can send a packet, including GRE traffic, that arrives through a stacked bonding hierarchy and triggers AF_PACKET/NFLOG/NFQUEUE hardware-address parsing on the top bond. The vulnerable code is reached from network packet receive processing, not from a physical or purely local-only interface.\nAC:L - Once the stacked bond and packet metadata consumer exist, a single matching received packet deterministically enters `dev_parse_header()` and recurses indefinitely. There is no race, timing window, heap shaping, or attacker-uncontrolled probabilistic condition needed to trigger the denial of service.\nPR:N - The network-triggered path does not require the remote attacker to authenticate or hold local privileges; they only need to send traffic to the affected interface/tunnel. Although local namespace users can also create a reproducer with CAP_NET_ADMIN/CAP_NET_RAW in their namespace, the highest reasonable scenario requires no attacker privileges.\nUI:N - No victim action is required at exploit time when the affected bond stack and packet logging/capture path are already active. The packet alone triggers the vulnerable parse path.\nS:U - The impact remains within the kernel/networking security authority of the vulnerable system. There is no VM escape, sandbox boundary crossing, or separate security scope affected.\nC:N - The bug is an unbounded recursive call caused by using the top-level `skb->dev`; it does not create an information disclosure or controlled read primitive.\nI:N - The vulnerable path does not corrupt attacker-selected data or provide a write/control-flow primitive; the final lower-device parser is never reached. The observed consequence is recursion leading to denial of service.\nA:H - The infinite recursion can hang kernel packet processing and lead to stack overflow/lockdep exhaustion or kernel crash. This is a high availability impact."}]}],"providerMetadata":{"shortName":"Linux","orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","dateUpdated":"2026-10-30T12:24:07.666Z"},"cpeApplicability":[{"nodes":[{"operator":"OR","negate":false,"cpeMatch":[{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"6.18.19","versionEndExcluding":"6.18.20"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"6.19.9","versionEndExcluding":"6.19.10"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"6.1.191"}]}]}],"x_generator":{"engine":"bippy-1.2.0"}}}}}