{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-52931", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2026-06-09T07:44:35.369Z", "datePublished": "2026-06-24T07:14:23.349Z", "dateUpdated": "2026-06-28T06:36:51.143Z"}, "containers": {"cna": {"providerMetadata": {"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-06-28T06:36:51.143Z"}, "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nbatman-adv: tp_meter: avoid use of uninit sender vars\n\nbatadv_tp_recv_ack() and batadv_tp_stop() are only valid for tp_vars in the\nBATADV_TP_SENDER role. When called with a BATADV_TP_RECEIVER role, it\nproceeds to read sender-only members that were never initialized, leading\nto undefined behavior.\n\nThis can be triggered when a node that is currently acting as a receiver in\nan ongoing tp_meter session receives a malicious ACK packet.\n\nGuard against this by checking tp_vars->role immediately after the\nlookup and bailing out if it is not BATADV_TP_SENDER, before any of\nthose members are accessed."}], "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"}}], "affected": [{"product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["net/batman-adv/tp_meter.c"], "versions": [{"version": "33a3bb4a3345bb511f9c69c913da95d4693e2a4e", "lessThan": "0e388af04b3958b178a1b979527f93eb46ea1fee", "status": "affected", "versionType": "git"}, {"version": "33a3bb4a3345bb511f9c69c913da95d4693e2a4e", "lessThan": "1a21c055f66e78973712a4a1be2a554f1ee2e4f4", "status": "affected", "versionType": "git"}, {"version": "33a3bb4a3345bb511f9c69c913da95d4693e2a4e", "lessThan": "9884c9c02d3c90e9215db3c5128f59045d20ae91", "status": "affected", "versionType": "git"}, {"version": "33a3bb4a3345bb511f9c69c913da95d4693e2a4e", "lessThan": "53f931e0146ae5bdab4cba302646827d06b3794b", "status": "affected", "versionType": "git"}, {"version": "33a3bb4a3345bb511f9c69c913da95d4693e2a4e", "lessThan": "ecdaa3e4d91040206afe21bc8a0d1198a0971ff3", "status": "affected", "versionType": "git"}, {"version": "33a3bb4a3345bb511f9c69c913da95d4693e2a4e", "lessThan": "dc2ae5fbd2dadc26735092f140b246841d969a11", "status": "affected", "versionType": "git"}, {"version": "33a3bb4a3345bb511f9c69c913da95d4693e2a4e", "lessThan": "85397e48afe6be83ffca5ad3f4792296bfc81d3d", "status": "affected", "versionType": "git"}, {"version": "33a3bb4a3345bb511f9c69c913da95d4693e2a4e", "lessThan": "6c65cf23d4c6170fcf5714c32aa64689718cb142", "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/tp_meter.c"], "versions": [{"version": "4.8", "status": "affected"}, {"version": "0", "lessThan": "4.8", "status": "unaffected", "versionType": "semver"}, {"version": "5.10.258", "lessThanOrEqual": "5.10.*", "status": "unaffected", "versionType": "semver"}, {"version": "5.15.209", "lessThanOrEqual": "5.15.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.1.175", "lessThanOrEqual": "6.1.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.6.142", "lessThanOrEqual": "6.6.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.12.92", "lessThanOrEqual": "6.12.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.18.34", "lessThanOrEqual": "6.18.*", "status": "unaffected", "versionType": "semver"}, {"version": "7.0.11", "lessThanOrEqual": "7.0.*", "status": "unaffected", "versionType": "semver"}, {"version": "7.1", "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": "4.8", "versionEndExcluding": "5.10.258"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.8", "versionEndExcluding": "5.15.209"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.8", "versionEndExcluding": "6.1.175"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.8", "versionEndExcluding": "6.6.142"}, {"vulnerable": true, "criteria": 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{"url": "https://git.kernel.org/stable/c/dc2ae5fbd2dadc26735092f140b246841d969a11"}, {"url": "https://git.kernel.org/stable/c/85397e48afe6be83ffca5ad3f4792296bfc81d3d"}, {"url": "https://git.kernel.org/stable/c/6c65cf23d4c6170fcf5714c32aa64689718cb142"}], "title": "batman-adv: tp_meter: avoid use of uninit sender vars", "x_generator": {"engine": "bippy-1.2.0"}}}}

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{"bugzilla": {"description": "kernel: batman-adv: tp_meter: avoid use of uninit sender vars", "id": "2492118", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2492118"}, "csaw": false, "cwe": "CWE-824", "details": ["A flaw was found in the `batman-adv` `tp_meter` module of the Linux kernel. A remote attacker could exploit this vulnerability by sending a specially crafted acknowledgment (ACK) packet to a node configured as a receiver in an ongoing `tp_meter` session. This could lead to the use of uninitialized sender variables, resulting in undefined behavior and potentially a denial of service."], "name": "CVE-2026-52931", "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": "2026-06-24T00:00:00Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2026-52931\nhttps://nvd.nist.gov/vuln/detail/CVE-2026-52931\nhttps://lore.kernel.org/linux-cve-announce/2026062432-CVE-2026-52931-f85c@gregkh/T"]}

{"affected": [{"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[33a3bb4a3345bb511f9c69c913da95d4693e2a4e,0e388af04b3958b178a1b979527f93eb46ea1fee)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[33a3bb4a3345bb511f9c69c913da95d4693e2a4e,1a21c055f66e78973712a4a1be2a554f1ee2e4f4)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[33a3bb4a3345bb511f9c69c913da95d4693e2a4e,53f931e0146ae5bdab4cba302646827d06b3794b)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[33a3bb4a3345bb511f9c69c913da95d4693e2a4e,6c65cf23d4c6170fcf5714c32aa64689718cb142)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[33a3bb4a3345bb511f9c69c913da95d4693e2a4e,9884c9c02d3c90e9215db3c5128f59045d20ae91)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[33a3bb4a3345bb511f9c69c913da95d4693e2a4e,ecdaa3e4d91040206afe21bc8a0d1198a0971ff3)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[33a3bb4a3345bb511f9c69c913da95d4693e2a4e,dc2ae5fbd2dadc26735092f140b246841d969a11)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[33a3bb4a3345bb511f9c69c913da95d4693e2a4e,85397e48afe6be83ffca5ad3f4792296bfc81d3d)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[33a3bb4a3345bb511f9c69c913da95d4693e2a4e,6c65cf23d4c6170fcf5714c32aa64689718cb142)"}}], "enrichment": {"confidence": 99.0, "confidence_source": "inferred", "scores": [{"score": 99.0, "source": "inferred"}, {"score": 100.0, "source": "matching"}]}, "original": {"product": "Linux", "source": "cna", "vendor": "Linux"}, "product": "linux_kernel", "vendor": "linux"}, {"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "generic", "value": "4.8"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "generic", "value": "[0,4.8)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "generic", "value": "[5.10.258,5.10.*]"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "generic", "value": "[5.15.209,5.15.*]"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "generic", "value": "[6.1.175,6.1.*]"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "generic", "value": "[6.6.142,6.6.*]"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "generic", "value": "[6.12.92,6.12.*]"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "generic", "value": "[6.18.34,6.18.*]"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "generic", "value": "[7.0.11,7.0.*]"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "generic", "value": "[7.1,*]"}}], "enrichment": {"confidence": 99.0, "confidence_source": "inferred", "scores": [{"score": 99.0, "source": "inferred"}, {"score": 100.0, "source": "matching"}]}, "original": {"product": "Linux", "source": "cna", "vendor": "Linux"}, "product": "linux_kernel", "vendor": "linux"}], "created": "2026-06-24T12:30:16.069985+00:00", "updated": "2026-06-28T14:00:21.072621+00:00", "vendors": ["linux", "linux$PRODUCT$linux_kernel"]}