{ "dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": { "cveId": "CVE-2026-80599", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2026-08-26T14:34:25.771Z", "datePublished": "2026-08-28T06:48:26.709Z", "dateUpdated": "2026-10-16T19:26:29.749Z" }, "containers": { "cna": { "providerMetadata": { "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-08-29T06:21:11.082Z" }, "descriptions": [ { "lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nbatman-adv: dat: ensure accessible eth_hdr proto field\n\nWhen batadv_get_vid() accesses the proto field of the ethernet header, it\nis not checking if the data itself is accessible. The caller is responsible\nfor it. But in contrast to other call sites, batadv_dat_get_vid() and its\ncaller didn't make sure this is true. This could have caused an\nout-of-bounds access." } ], "metrics": [ { "cvssV3_1": { "version": "3.1", "vectorString": "CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H", "baseScore": 8.1, "baseSeverity": "HIGH" }, "scenarios": [ { "lang": "en", "value": "AV:A - Exploitation requires injecting crafted ETH_P_BATMAN frames on the victim's batman-adv hard interface via batadv_batman_skb_recv(); an attacker must be on the same L2 mesh segment (WiFi community mesh, industrial mesh, or shared Ethernet backbone), not arbitrary Internet routing.\nAC:L - The attacker fully controls remote packet length and contents; sending a batman-adv unicast or broadcast frame with only the batman header (10 or 14 bytes) and no embedded Ethernet payload bypasses hdr_size-only pskb_may_pull checks and deterministically forces the h_proto read past skb->tail without races or rare configuration.\nPR:N - No Linux account or capability on the victim is required; any unauthenticated mesh peer that can transmit ETH_P_BATMAN frames to an active batman-adv node with Distributed ARP Table enabled reaches batadv_dat_snoop_incoming_*() through the normal RX handler without local login or CAP_NET_ADMIN on the target.\nUI:N - The vulnerable path runs automatically in softirq when the mesh interface receives qualifying traffic; no victim mount, click, or administrative action is needed beyond batman-adv already running with DAT enabled (the default at mesh interface creation).\nS:U - Impact is an out-of-bounds kernel read during batman-adv packet processing on the receiving mesh node; it does not cross a VM, container, or IOMMU security boundary to affect a different authority's resources.\nC:H - batadv_get_vid() reads ethhdr->h_proto (2 bytes at offset 12 within the embedded Ethernet header) without ensuring hdr_size+ETH_HLEN bytes are accessible, causing an out-of-bounds read of adjacent skb tailroom or slab memory beyond the packet buffer per kernel OOB-read guidance.\nI:N - This is an out-of-bounds read only with no memory write or corruption; subsequent batadv_arp_get_type() performs its own pskb_may_pull() before further parsing, and the DAT snoop path returns without modifying kernel structures beyond the illicit read.\nA:H - Reading past skb->tail in NET_RX_SOFTIRQ can provoke a kernel oops or panic when the access crosses an unmapped page boundary, denying mesh and host connectivity; any out-of-bounds kernel access on the packet receive path is rated high availability impact." } ] } ], "affected": [ { "product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": [ "net/batman-adv/distributed-arp-table.c", "net/batman-adv/main.c" ], "versions": [ { "version": "be1db4f6615b5e6156c807ea8985171c215c2d57", "lessThan": "da3677b5ed362742d30ceab31bfafcdc74dc2642", "status": "affected", "versionType": "git" }, { "version": "be1db4f6615b5e6156c807ea8985171c215c2d57", "lessThan": "6d3ea37074bb747f745d28138f87745ba9bd97c5", "status": "affected", "versionType": "git" }, { "version": "be1db4f6615b5e6156c807ea8985171c215c2d57", "lessThan": "7913935d41f166c367bbf7cc76a79e50044388e8", "status": "affected", "versionType": "git" }, { "version": "be1db4f6615b5e6156c807ea8985171c215c2d57", "lessThan": "3c62694c31f043568c3f4784b8d247cc3bea6b4c", "status": "affected", "versionType": "git" }, { "version": "be1db4f6615b5e6156c807ea8985171c215c2d57", "lessThan": "5836a050d02e9598fa0f71e88dde28b63dfa35e3", "status": "affected", "versionType": "git" }, { "version": "be1db4f6615b5e6156c807ea8985171c215c2d57", "lessThan": "8f76277d02176cd739945bba3379448e2e22e799", "status": "affected", "versionType": "git" }, { "version": "be1db4f6615b5e6156c807ea8985171c215c2d57", "lessThan": "4407ff3af469356f9641c4a6e7072309bae86bea", "status": "affected", "versionType": "git" }, { "version": "be1db4f6615b5e6156c807ea8985171c215c2d57", "lessThan": "26560c4a03dc4d607331600c187f59ab2df5f341", "status": "affected", "versionType": "git" } ] }, { "product": "Linux", "vendor": "Linux", "defaultStatus": "affected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": [ "net/batman-adv/distributed-arp-table.c", "net/batman-adv/main.c" ], "versions": [ { "version": "3.13", "status": "affected" }, { "version": "0", "lessThan": "3.13", "status": "unaffected", "versionType": "semver" }, { "version": "5.10.261", "lessThanOrEqual": "5.10.*", "status": "unaffected", "versionType": "semver" }, { "version": "5.15.212", "lessThanOrEqual": "5.15.*", "status": "unaffected", "versionType": "semver" }, { "version": "6.1.178", "lessThanOrEqual": "6.1.*", "status": "unaffected", "versionType": "semver" }, { "version": "6.6.145", "lessThanOrEqual": "6.6.*", "status": "unaffected", "versionType": "semver" }, { "version": "6.12.97", "lessThanOrEqual": "6.12.*", "status": "unaffected", "versionType": "semver" }, { "version": "6.18.40", "lessThanOrEqual": "6.18.*", "status": "unaffected", "versionType": "semver" }, { "version": "7.1.5", "lessThanOrEqual": "7.1.*", "status": "unaffected", "versionType": "semver" }, { "version": "7.2", "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": "3.13", "versionEndExcluding": "5.10.261" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "3.13", "versionEndExcluding": "5.15.212" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "3.13", "versionEndExcluding": "6.1.178" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "3.13", "versionEndExcluding": "6.6.145" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "3.13", "versionEndExcluding": "6.12.97" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "3.13", "versionEndExcluding": "6.18.40" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "3.13", "versionEndExcluding": "7.1.5" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "3.13", "versionEndExcluding": "7.2" } ] } ] } ], "references": [ { "url": "https://git.kernel.org/stable/c/da3677b5ed362742d30ceab31bfafcdc74dc2642" }, { "url": "https://git.kernel.org/stable/c/6d3ea37074bb747f745d28138f87745ba9bd97c5" }, { "url": "https://git.kernel.org/stable/c/7913935d41f166c367bbf7cc76a79e50044388e8" }, { "url": "https://git.kernel.org/stable/c/3c62694c31f043568c3f4784b8d247cc3bea6b4c" }, { "url": "https://git.kernel.org/stable/c/5836a050d02e9598fa0f71e88dde28b63dfa35e3" }, { "url": "https://git.kernel.org/stable/c/8f76277d02176cd739945bba3379448e2e22e799" }, { "url": "https://git.kernel.org/stable/c/4407ff3af469356f9641c4a6e7072309bae86bea" }, { "url": "https://git.kernel.org/stable/c/26560c4a03dc4d607331600c187f59ab2df5f341" } ], "title": "batman-adv: dat: ensure accessible eth_hdr proto field", "x_generator": { "engine": "bippy-1.2.0" } }, "adp": [ { "metrics": [ { "other": { "type": "ssvc", "content": { "id": "CVE-2026-80599", "role": "CISA Coordinator", "options": [ { "Exploitation": "none" }, { "Automatable": "no" }, { "Technical Impact": "partial" } ], "version": "2.0.3", "timestamp": "2026-10-16T19:18:22.359068Z" } } } ], "title": "CISA ADP Vulnrichment", "providerMetadata": { "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "shortName": "CISA-ADP", "dateUpdated": "2026-10-16T19:26:29.749Z" } } ] } }