{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-72235", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2026-08-09T03:40:39.914Z", "datePublished": "2026-08-15T05:54:25.136Z", "dateUpdated": "2026-08-17T05:41:52.969Z"}, "containers": {"cna": {"providerMetadata": {"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-08-17T05:41:52.969Z"}, "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nbatman-adv: retrieve ethhdr after potential skb realloc on RX\n\npskb_may_pull() in batadv_interface_rx() could reallocate the buffer behind\nthe skb. Variables which were pointing to the old buffer need to be\nreassigned to avoid an use-after-free.\n\nThis was done correctly for the VLAN header but missed for the ethernet\nheader which is later used for the TT and AP isolation handling."}], "metrics": [{"cvssV3_1": {"version": "3.1", "vectorString": "CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H", "baseScore": 8.8, "baseSeverity": "HIGH"}, "scenarios": [{"lang": "en", "value": "AV:A - Exploitation requires delivering crafted ETH_P_BATMAN frames on the victim's batman-adv mesh hard interface (802.11/wired L2 mesh), reachable from any adjacent mesh peer without local shell access.\nAC:L - The attacker fully controls remote batman-adv packet contents (VLAN-encapsulated payload and skb layout) and can repeatedly send unicast/broadcast frames to reliably force pskb_may_pull() skb reallocation.\nPR:N - No privileges on the victim are required; any unauthenticated remote mesh participant that can inject batman-adv RX frames onto an active mesh node can reach batadv_interface_rx().\nUI:N - Exploitation is triggered solely by the attacker sending malicious mesh packets; no victim user action (mounting, clicking, or configuration changes) is needed at exploit time.\nS:U - Impact is kernel memory corruption and potential privilege escalation on the mesh node; it does not cross a VM/host, IOMMU, or sandbox security boundary.\nC:H - Stale ethhdr after skb realloc is a use-after-free read of freed skb data; attacker-influenced bytes from ethhdr->h_source/h_dest are consumed by TT and AP-isolation logic, enabling arbitrary kernel memory disclosure.\nI:H - UAF-supplied MAC data is copied into translation-table heap objects via batadv_tt_add_temporary_global_entry()/batadv_tt_global_add(), providing a memory-corruption primitive suitable for control-flow or data hijacking.\nA:H - Use-after-free on the RX path can cause kernel oops/panic from dereferencing freed skb buffer memory during TT/AP-isolation handling, even before full exploitation."}]}], "affected": [{"product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["net/batman-adv/mesh-interface.c"], "versions": [{"version": "c6c8fea29769d998d94fcec9b9f14d4b52b349d3", "lessThan": "6e189f14d1ea28db212b9d70a02131a7ce518012", "status": "affected", "versionType": "git"}, {"version": "c6c8fea29769d998d94fcec9b9f14d4b52b349d3", "lessThan": "a1820344b180cb55af748f102bc536b5c93164db", "status": "affected", "versionType": "git"}, {"version": "c6c8fea29769d998d94fcec9b9f14d4b52b349d3", "lessThan": "6abf73589bed3f27ee240c08108feb72bed0b9c6", "status": "affected", "versionType": "git"}, {"version": "c6c8fea29769d998d94fcec9b9f14d4b52b349d3", "lessThan": "f19259395b44af67f3c274e34237c295b526b859", "status": "affected", "versionType": "git"}, {"version": "c6c8fea29769d998d94fcec9b9f14d4b52b349d3", "lessThan": "2cefa5141cab8ec1e4b24cf585958b13f2e3049d", "status": "affected", "versionType": "git"}, {"version": "c6c8fea29769d998d94fcec9b9f14d4b52b349d3", "lessThan": "85a71a81854e0e191ad0e533eabb4eff54866feb", "status": "affected", "versionType": "git"}, {"version": "c6c8fea29769d998d94fcec9b9f14d4b52b349d3", "lessThan": "b031fc97e1993d29d6c3a0e86a99140528cf31e8", "status": "affected", "versionType": "git"}, {"version": "c6c8fea29769d998d94fcec9b9f14d4b52b349d3", "lessThan": "035e1fed892d3d06002a73ff73668f618a514644", "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/mesh-interface.c"], "versions": [{"version": "2.6.38", "status": "affected"}, {"version": "0", "lessThan": "2.6.38", "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": "2.6.38", "versionEndExcluding": "5.10.261"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "2.6.38", "versionEndExcluding": "5.15.212"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "2.6.38", "versionEndExcluding": "6.1.178"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "2.6.38", "versionEndExcluding": "6.6.145"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "2.6.38", "versionEndExcluding": "6.12.97"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "2.6.38", "versionEndExcluding": "6.18.40"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "2.6.38", "versionEndExcluding": "7.1.5"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "2.6.38", "versionEndExcluding": "7.2"}]}]}], "references": [{"url": "https://git.kernel.org/stable/c/6e189f14d1ea28db212b9d70a02131a7ce518012"}, {"url": "https://git.kernel.org/stable/c/a1820344b180cb55af748f102bc536b5c93164db"}, {"url": "https://git.kernel.org/stable/c/6abf73589bed3f27ee240c08108feb72bed0b9c6"}, {"url": "https://git.kernel.org/stable/c/f19259395b44af67f3c274e34237c295b526b859"}, {"url": "https://git.kernel.org/stable/c/2cefa5141cab8ec1e4b24cf585958b13f2e3049d"}, {"url": "https://git.kernel.org/stable/c/85a71a81854e0e191ad0e533eabb4eff54866feb"}, {"url": "https://git.kernel.org/stable/c/b031fc97e1993d29d6c3a0e86a99140528cf31e8"}, {"url": "https://git.kernel.org/stable/c/035e1fed892d3d06002a73ff73668f618a514644"}], "title": "batman-adv: retrieve ethhdr after potential skb realloc on RX", "x_generator": {"engine": "bippy-1.2.0"}}}}

{}

{"affected": [{"affectedData": [{"defaultStatus": "unaffected", "product": "Linux", "programFiles": ["net/batman-adv/mesh-interface.c"], "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "versions": [{"lessThan": "6e189f14d1ea28db212b9d70a02131a7ce518012", "status": "affected", "version": "c6c8fea29769d998d94fcec9b9f14d4b52b349d3", "versionType": "git"}, {"lessThan": "a1820344b180cb55af748f102bc536b5c93164db", "status": "affected", "version": "c6c8fea29769d998d94fcec9b9f14d4b52b349d3", "versionType": "git"}, {"lessThan": "6abf73589bed3f27ee240c08108feb72bed0b9c6", "status": "affected", "version": "c6c8fea29769d998d94fcec9b9f14d4b52b349d3", "versionType": "git"}, {"lessThan": "f19259395b44af67f3c274e34237c295b526b859", "status": "affected", "version": "c6c8fea29769d998d94fcec9b9f14d4b52b349d3", "versionType": "git"}, {"lessThan": "2cefa5141cab8ec1e4b24cf585958b13f2e3049d", "status": "affected", "version": "c6c8fea29769d998d94fcec9b9f14d4b52b349d3", "versionType": "git"}, {"lessThan": "85a71a81854e0e191ad0e533eabb4eff54866feb", "status": "affected", "version": "c6c8fea29769d998d94fcec9b9f14d4b52b349d3", "versionType": "git"}, {"lessThan": "b031fc97e1993d29d6c3a0e86a99140528cf31e8", "status": "affected", "version": "c6c8fea29769d998d94fcec9b9f14d4b52b349d3", "versionType": "git"}, {"lessThan": "035e1fed892d3d06002a73ff73668f618a514644", "status": "affected", "version": "c6c8fea29769d998d94fcec9b9f14d4b52b349d3", "versionType": "git"}]}, {"defaultStatus": "affected", "product": "Linux", "programFiles": ["net/batman-adv/mesh-interface.c"], "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "versions": [{"status": "affected", "version": "2.6.38"}, {"lessThan": "2.6.38", "status": "unaffected", "version": "0", "versionType": "semver"}, {"lessThanOrEqual": "5.10.*", "status": "unaffected", "version": "5.10.261", "versionType": "semver"}, {"lessThanOrEqual": "5.15.*", "status": "unaffected", "version": "5.15.212", "versionType": "semver"}, {"lessThanOrEqual": "6.1.*", "status": "unaffected", "version": "6.1.178", "versionType": "semver"}, {"lessThanOrEqual": "6.6.*", "status": "unaffected", "version": "6.6.145", "versionType": "semver"}, {"lessThanOrEqual": "6.12.*", "status": "unaffected", "version": "6.12.97", "versionType": "semver"}, {"lessThanOrEqual": "6.18.*", "status": "unaffected", "version": "6.18.40", "versionType": "semver"}, {"lessThanOrEqual": "7.1.*", "status": "unaffected", "version": "7.1.5", "versionType": "semver"}, {"lessThanOrEqual": "*", "status": "unaffected", "version": "7.2", "versionType": "original_commit_for_fix"}]}], "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}], "cveTags": [], "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nbatman-adv: retrieve ethhdr after potential skb realloc on RX\n\npskb_may_pull() in batadv_interface_rx() could reallocate the buffer behind\nthe skb. Variables which were pointing to the old buffer need to be\nreassigned to avoid an use-after-free.\n\nThis was done correctly for the VLAN header but missed for the ethernet\nheader which is later used for the TT and AP isolation handling."}], "id": "CVE-2026-72235", "lastModified": "2026-08-17T06:18:24.993", "metrics": {"cvssMetricV31": [{"cvssData": {"attackComplexity": "LOW", "attackVector": "ADJACENT_NETWORK", "availabilityImpact": "HIGH", "baseScore": 8.8, "baseSeverity": "HIGH", "confidentialityImpact": "HIGH", "integrityImpact": "HIGH", "privilegesRequired": "NONE", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H", "version": "3.1"}, "exploitabilityScore": 2.8, "impactScore": 5.9, "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "type": "Secondary"}]}, "published": "2026-08-15T06:21:50.510", "references": [{"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/035e1fed892d3d06002a73ff73668f618a514644"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/2cefa5141cab8ec1e4b24cf585958b13f2e3049d"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/6abf73589bed3f27ee240c08108feb72bed0b9c6"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/6e189f14d1ea28db212b9d70a02131a7ce518012"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/85a71a81854e0e191ad0e533eabb4eff54866feb"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/a1820344b180cb55af748f102bc536b5c93164db"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/b031fc97e1993d29d6c3a0e86a99140528cf31e8"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/f19259395b44af67f3c274e34237c295b526b859"}], "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "vulnStatus": "Received"}

{"bugzilla": {"description": "kernel: batman-adv: retrieve ethhdr after potential skb realloc on RX", "id": "2516627", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2516627"}, "csaw": false, "cvss3": {"cvss3_base_score": "5.5", "cvss3_scoring_vector": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H", "status": "draft"}, "cwe": "CWE-825", "details": ["A flaw was found in the Linux kernel (batman-adv component). The batadv_interface_rx() function, responsible for handling network packets, can reallocate its internal buffer. However, a pointer to the ethernet header is not correctly updated after this reallocation. This oversight leads to a use-after-free vulnerability, where the system attempts to access memory that has already been released. A remote attacker could potentially exploit this to cause a denial of service (DoS) or disclose sensitive information, impacting network traffic processing and isolation."], "name": "CVE-2026-72235", "package_state": [{"cpe": "cpe:/o:redhat:enterprise_linux:10", "fix_state": "Not affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 10"}, {"cpe": "cpe:/o:redhat:enterprise_linux:6", "fix_state": "Not affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 6"}, {"cpe": "cpe:/o:redhat:enterprise_linux:7", "fix_state": "Not affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 7"}, {"cpe": "cpe:/o:redhat:enterprise_linux:7", "fix_state": "Not affected", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 7"}, {"cpe": "cpe:/o:redhat:enterprise_linux:8", "fix_state": "Not affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:8", "fix_state": "Not affected", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Not affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 9"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Not affected", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 9"}], "public_date": "2026-08-15T00:00:00Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2026-72235\nhttps://nvd.nist.gov/vuln/detail/CVE-2026-72235\nhttps://lore.kernel.org/linux-cve-announce/2026081550-CVE-2026-72235-ab89@gregkh/T"], "threat_severity": "Moderate"}