{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-72234", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2026-08-09T03:40:39.914Z", "datePublished": "2026-08-15T05:54:24.395Z", "dateUpdated": "2026-08-17T05:41:51.879Z"}, "containers": {"cna": {"providerMetadata": {"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-08-17T05:41:51.879Z"}, "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nbatman-adv: access unicast_ttvn skb->data only after skb realloc\n\nThe pskb_may_pull() called by batadv_get_vid() could reallocate the buffer\nbehind the 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 ethernet header but missed for the\nunicast_packet pointer."}], "metrics": [{"cvssV3_1": {"version": "3.1", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H", "baseScore": 9.8, "baseSeverity": "CRITICAL"}, "scenarios": [{"lang": "en", "value": "AV:N - Triggered in batadv_check_unicast_ttvn() when batadv_batman_skb_recv() processes incoming BATADV unicast packets from remote mesh peers on hard interfaces; crafted batman-adv frames reach the vulnerable code over the mesh network without local system access.\nAC:L - An attacker reliably triggers the UAF by sending a batman-adv unicast packet with a VLAN-tagged embedded Ethernet header to a victim node; packet fields are attacker-controlled and can force batadv_get_vid()'s pskb_may_pull() to reallocate the skb buffer.\nPR:N - No privileges are required on the victim host; exploitation only needs batman-adv active on an interface while the attacker acts as an unauthenticated mesh peer able to transmit batman-adv protocol frames to the target node.\nUI:N - No victim user interaction is needed; the kernel automatically processes the malicious batman-adv unicast packet on receive through the normal mesh routing receive path.\nS:U - The use-after-free corrupts kernel heap memory within the same host networking subsystem and does not cross VM, container, or IOMMU boundaries to impact a separate security authority.\nC:H - The stale unicast_packet pointer dereferences freed skb buffer memory for reads (unicast_packet->dest, unicast_packet->ttvn), constituting a kernel heap use-after-free that can disclose sensitive memory contents.\nI:H - The stale pointer is used for writes via ether_addr_copy(unicast_packet->dest) and unicast_packet->ttvn updates in reroute paths, enabling heap corruption and potential arbitrary kernel code execution.\nA:H - Use-after-free on the skb data buffer during batman-adv unicast processing can cause kernel oops, panic, or hang, and UAF heap corruption inherently threatens system availability even before full exploit development."}]}], "affected": [{"product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["net/batman-adv/routing.c"], "versions": [{"version": "c018ad3de61a1dc4194879a53e5559e094aa7b1a", "lessThan": "aa9558af859934f24717d4bab97d61004f91a736", "status": "affected", "versionType": "git"}, {"version": "c018ad3de61a1dc4194879a53e5559e094aa7b1a", "lessThan": "9c2c05629e46c1fd43931506d41c56a885a98eb4", "status": "affected", "versionType": "git"}, {"version": "c018ad3de61a1dc4194879a53e5559e094aa7b1a", "lessThan": "7b162b36de750565404cd3b98315706622c6974f", "status": "affected", "versionType": "git"}, {"version": "c018ad3de61a1dc4194879a53e5559e094aa7b1a", "lessThan": "ed90eb5c68420cdfe67ec1f773324198d2ef6f50", "status": "affected", "versionType": "git"}, {"version": "c018ad3de61a1dc4194879a53e5559e094aa7b1a", "lessThan": "979175834a699ccc3c4c0b0ba60ecae0f135a587", "status": "affected", "versionType": "git"}, {"version": "c018ad3de61a1dc4194879a53e5559e094aa7b1a", "lessThan": "b8afcf799b2cc92c41beebd029e53ed18960184a", "status": "affected", "versionType": "git"}, {"version": "c018ad3de61a1dc4194879a53e5559e094aa7b1a", "lessThan": "9a7b7248798123efbd5fafe58461d57c7cc718af", "status": "affected", "versionType": "git"}, {"version": "c018ad3de61a1dc4194879a53e5559e094aa7b1a", "lessThan": "7141990add3f75436f2933cb310654cad3b1e3e9", "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/routing.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/aa9558af859934f24717d4bab97d61004f91a736"}, {"url": "https://git.kernel.org/stable/c/9c2c05629e46c1fd43931506d41c56a885a98eb4"}, {"url": "https://git.kernel.org/stable/c/7b162b36de750565404cd3b98315706622c6974f"}, {"url": "https://git.kernel.org/stable/c/ed90eb5c68420cdfe67ec1f773324198d2ef6f50"}, {"url": "https://git.kernel.org/stable/c/979175834a699ccc3c4c0b0ba60ecae0f135a587"}, {"url": "https://git.kernel.org/stable/c/b8afcf799b2cc92c41beebd029e53ed18960184a"}, {"url": "https://git.kernel.org/stable/c/9a7b7248798123efbd5fafe58461d57c7cc718af"}, {"url": "https://git.kernel.org/stable/c/7141990add3f75436f2933cb310654cad3b1e3e9"}], "title": "batman-adv: access unicast_ttvn skb->data only after skb realloc", "x_generator": {"engine": "bippy-1.2.0"}}}}

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{"affected": [{"affectedData": [{"defaultStatus": "unaffected", "product": "Linux", "programFiles": ["net/batman-adv/routing.c"], "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "versions": [{"lessThan": "aa9558af859934f24717d4bab97d61004f91a736", "status": "affected", "version": "c018ad3de61a1dc4194879a53e5559e094aa7b1a", "versionType": "git"}, {"lessThan": "9c2c05629e46c1fd43931506d41c56a885a98eb4", "status": "affected", "version": "c018ad3de61a1dc4194879a53e5559e094aa7b1a", "versionType": "git"}, {"lessThan": "7b162b36de750565404cd3b98315706622c6974f", "status": "affected", "version": "c018ad3de61a1dc4194879a53e5559e094aa7b1a", "versionType": "git"}, {"lessThan": "ed90eb5c68420cdfe67ec1f773324198d2ef6f50", "status": "affected", "version": "c018ad3de61a1dc4194879a53e5559e094aa7b1a", "versionType": "git"}, {"lessThan": "979175834a699ccc3c4c0b0ba60ecae0f135a587", "status": "affected", "version": "c018ad3de61a1dc4194879a53e5559e094aa7b1a", "versionType": "git"}, {"lessThan": "b8afcf799b2cc92c41beebd029e53ed18960184a", "status": "affected", "version": "c018ad3de61a1dc4194879a53e5559e094aa7b1a", "versionType": "git"}, {"lessThan": "9a7b7248798123efbd5fafe58461d57c7cc718af", "status": "affected", "version": "c018ad3de61a1dc4194879a53e5559e094aa7b1a", "versionType": "git"}, {"lessThan": "7141990add3f75436f2933cb310654cad3b1e3e9", "status": "affected", "version": "c018ad3de61a1dc4194879a53e5559e094aa7b1a", "versionType": "git"}]}, {"defaultStatus": "affected", "product": "Linux", "programFiles": ["net/batman-adv/routing.c"], "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "versions": [{"status": "affected", "version": "3.13"}, {"lessThan": "3.13", "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: access unicast_ttvn skb->data only after skb realloc\n\nThe pskb_may_pull() called by batadv_get_vid() could reallocate the buffer\nbehind the 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 ethernet header but missed for the\nunicast_packet pointer."}], "id": "CVE-2026-72234", "lastModified": "2026-08-17T06:18:24.847", "metrics": {"cvssMetricV31": [{"cvssData": {"attackComplexity": "LOW", "attackVector": "NETWORK", "availabilityImpact": "HIGH", "baseScore": 9.8, "baseSeverity": "CRITICAL", "confidentialityImpact": "HIGH", "integrityImpact": "HIGH", "privilegesRequired": "NONE", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H", "version": "3.1"}, "exploitabilityScore": 3.9, "impactScore": 5.9, "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "type": "Secondary"}]}, "published": "2026-08-15T06:21:50.390", "references": [{"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/7141990add3f75436f2933cb310654cad3b1e3e9"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/7b162b36de750565404cd3b98315706622c6974f"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/979175834a699ccc3c4c0b0ba60ecae0f135a587"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/9a7b7248798123efbd5fafe58461d57c7cc718af"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/9c2c05629e46c1fd43931506d41c56a885a98eb4"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/aa9558af859934f24717d4bab97d61004f91a736"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/b8afcf799b2cc92c41beebd029e53ed18960184a"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/ed90eb5c68420cdfe67ec1f773324198d2ef6f50"}], "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "vulnStatus": "Received"}

{"bugzilla": {"description": "kernel: batman-adv: access unicast_ttvn skb->data only after skb realloc", "id": "2516597", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2516597"}, "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's batman-adv module. When the `pskb_may_pull()` function is called by `batadv_get_vid()`, it can reallocate a buffer. However, a pointer to the old buffer, specifically `unicast_packet`, was not correctly reassigned, leading to a use-after-free condition. This memory corruption vulnerability could allow a local attacker to cause a denial of service or potentially escalate privileges."], "name": "CVE-2026-72234", "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-2026-72234\nhttps://nvd.nist.gov/vuln/detail/CVE-2026-72234\nhttps://lore.kernel.org/linux-cve-announce/2026081550-CVE-2026-72234-598a@gregkh/T"], "threat_severity": "Moderate"}