CVE-2026-63835

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This will only stop after all\ncores can no longer find the RCU protected list of hard interfaces. These\nqueued skbs will never be freed or consumed by batadv_v_ogm_aggr_work.\n\nThe batadv_v_ogm_iface_disable() function must block\nbatadv_v_ogm_queue_on_if() to avoid leak of skbs."}], "affected": [{"product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["net/batman-adv/bat_v.c", "net/batman-adv/bat_v_ogm.c", "net/batman-adv/types.h"], "versions": [{"version": "f89255a02f1d75d8e1b9d1c31435fcb64840cb2a", "lessThan": "d462ced79dd430200cf888984e8005da77fc810b", "status": "affected", "versionType": "git"}, {"version": "f89255a02f1d75d8e1b9d1c31435fcb64840cb2a", "lessThan": "f79deaaf822ab0ee2424cf28781f9ab91576bea3", "status": "affected", "versionType": "git"}, {"version": "f89255a02f1d75d8e1b9d1c31435fcb64840cb2a", "lessThan": "d3569327fc7395b2b0461a0a0cb77a0bb74786c0", "status": "affected", "versionType": "git"}, {"version": "f89255a02f1d75d8e1b9d1c31435fcb64840cb2a", "lessThan": 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This will only stop after all\ncores can no longer find the RCU protected list of hard interfaces. These\nqueued skbs will never be freed or consumed by batadv_v_ogm_aggr_work.\n\nThe batadv_v_ogm_iface_disable() function must block\nbatadv_v_ogm_queue_on_if() to avoid leak of skbs."}], "id": "CVE-2026-63835", "lastModified": "2026-11-12T19:50:03.017", "metrics": {"cvssMetricV31": [{"cvssData": {"attackComplexity": "LOW", "attackVector": "LOCAL", "availabilityImpact": "HIGH", "baseScore": 5.5, "baseSeverity": "MEDIUM", "confidentialityImpact": "NONE", "integrityImpact": "NONE", "privilegesRequired": "LOW", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H", "version": "3.1"}, "exploitabilityScore": 1.8, "impactScore": 3.6, "source": "nvd@nist.gov", "type": "Primary"}]}, "published": "2026-07-19T12:16:56.970", "references": [{"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/3d4548c96d6f21ac1a9b06c5f82f3ef439c87023"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/86ab6b6fb5b82163bf6c45780bb72150021d7349"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/97644fdaaf6446ffbe182c5eb804fceb5b1a51b7"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/d11c00b95b2a3b3934007fc003dccc6fdcc061ad"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/d3569327fc7395b2b0461a0a0cb77a0bb74786c0"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/d462ced79dd430200cf888984e8005da77fc810b"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/f04dde74399431fb07abbdd9cd5d0ed624771d04"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/f79deaaf822ab0ee2424cf28781f9ab91576bea3"}], "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "vulnStatus": "Analyzed", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-401"}], "source": "nvd@nist.gov", "type": "Primary"}]}

{"bugzilla": {"description": "kernel: batman-adv: v: prevent OGM aggregation on disabled hardif", "id": "2502238", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2502238"}, "csaw": false, "cwe": "CWE-772", "details": ["In the Linux kernel, the following vulnerability has been resolved:\nbatman-adv: v: prevent OGM aggregation on disabled hardif\nWhen an interface gets disabled, the worker is correctly disabled by\nbatadv_hardif_disable_interface() -> ... -> batadv_v_ogm_iface_disable().\nIn this process, the skb aggr_list is also freed.\nBut batadv_v_ogm_send_meshif() can still queue new skbs (via\nbatadv_v_ogm_queue_on_if()) to the aggr_list. This will only stop after all\ncores can no longer find the RCU protected list of hard interfaces. These\nqueued skbs will never be freed or consumed by batadv_v_ogm_aggr_work.\nThe batadv_v_ogm_iface_disable() function must block\nbatadv_v_ogm_queue_on_if() to avoid leak of skbs.", "A flaw was found in the Linux kernel's Better Approach To Mobile Ad-hoc Networking (batman-adv) module. When a batman-adv interface is disabled, the system can still queue network packets (skbs) for aggregation. These packets are not properly freed, leading to a memory leak. This can result in resource exhaustion and a Denial of Service (DoS) condition for the system."], "name": "CVE-2026-63835", "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": "2026-07-19T00:00:00Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2026-63835\nhttps://nvd.nist.gov/vuln/detail/CVE-2026-63835\nhttps://lore.kernel.org/linux-cve-announce/2026071909-CVE-2026-63835-5915@gregkh/T"]}

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