{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-52934", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2026-06-09T07:44:35.369Z", "datePublished": "2026-06-24T07:14:25.321Z", "dateUpdated": "2026-08-05T12:31:52.290Z"}, "containers": {"cna": {"providerMetadata": {"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-08-05T12:31:52.290Z"}, "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nbatman-adv: tvlv: reject oversized TVLV packets\n\nbatadv_tvlv_container_ogm_append() builds a TVLV packet section from\nthe tvlv.container_list. The total size of this section is computed by\nbatadv_tvlv_container_list_size(), which sums the sizes of all registered\ncontainers.\n\nThe return type and accumulator in batadv_tvlv_container_list_size() were\nu16. If the accumulated size exceeds U16_MAX, the value wraps around,\ncausing the subsequent allocation in batadv_tvlv_container_ogm_append()\nto be undersized. The memcpy-style copy that follows would then write\nbeyond the end of the allocated buffer, corrupting kernel memory.\n\nFix this by widening the return type of batadv_tvlv_container_list_size()\nto size_t. In batadv_tvlv_container_ogm_append(), check the computed length\nagainst U16_MAX before proceeding, and bail out as if the allocation had\nfailed when the limit is exceeded."}], "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 - batman-adv is a layer-2 mesh/bridge subsystem, and the defensible remote path is from an attached same-link client or mesh segment causing local TT TVLV growth before periodic OGM generation. This is adjacent-network reachability rather than a routable Internet service.\nAC:L - Once on the L2 segment in a vulnerable high-MTU/fragmentation deployment, the attacker can repeatedly emit frames with many source MACs and wait for the periodic OGM append path. No race or probabilistic condition is required.\nPR:N - The attacker does not need a local account or kernel privileges on the vulnerable system in the adjacent-client scenario. Administrative netlink privileges are needed to deploy/configure batman-adv, but not to trigger TT learning on an already deployed node.\nUI:N - No victim user action is required after the vulnerable batman-adv node is configured and active. OGM generation is periodic kernel work.\nS:U - The corruption occurs in the vulnerable host kernel and affects resources under the same kernel security authority. This is not a VM escape, IOMMU bypass, or other cross-scope boundary.\nC:H - The bug is a kernel heap out-of-bounds write from an undersized kmalloc buffer, with attacker-influenced TVLV/TT data. Such memory corruption is reasonably exploitable for information disclosure, so confidentiality is High.\nI:H - The memcpy-style overflow corrupts adjacent kernel heap memory and can plausibly be shaped into arbitrary write or code execution. Out-of-bounds kernel writes are scored as High integrity impact.\nA:H - Even without full exploitation, the heap overflow can corrupt kernel memory and crash or panic the system. Availability impact is therefore High."}]}], "affected": [{"product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["net/batman-adv/tvlv.c"], "versions": [{"version": "ef26157747d42254453f6b3ac2bd8bd3c53339c3", "lessThan": "c02aa6c0c9d1bea9bb75dea362b75ad225137bae", "status": "affected", "versionType": "git"}, {"version": "ef26157747d42254453f6b3ac2bd8bd3c53339c3", "lessThan": "1595628a2f877d052eda18865ccf539392c47c04", "status": "affected", "versionType": "git"}, {"version": "ef26157747d42254453f6b3ac2bd8bd3c53339c3", "lessThan": "6448a49344e87487b61bd88cb850cd694a0f576d", "status": "affected", "versionType": "git"}, {"version": "ef26157747d42254453f6b3ac2bd8bd3c53339c3", "lessThan": "13493b00dd1e05a705981e052158652ea23eb482", "status": "affected", "versionType": "git"}, {"version": "ef26157747d42254453f6b3ac2bd8bd3c53339c3", "lessThan": "94db72e9dac202e017ee3db22c59d17e4f3bf171", "status": "affected", "versionType": "git"}, {"version": "ef26157747d42254453f6b3ac2bd8bd3c53339c3", "lessThan": "ede47988ac5687793745b17c1634a496a2299919", "status": "affected", "versionType": "git"}, {"version": "ef26157747d42254453f6b3ac2bd8bd3c53339c3", "lessThan": "94a3d72cd9b21116d7c6d5bdc57c11401fc28557", "status": "affected", "versionType": "git"}, {"version": "ef26157747d42254453f6b3ac2bd8bd3c53339c3", "lessThan": "f50487e3566358b2b982b7801945e858c78ad9ab", "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/tvlv.c"], "versions": [{"version": "3.13", "status": "affected"}, {"version": "0", "lessThan": "3.13", "status": "unaffected", "versionType": "semver"}, {"version": "5.10.259", "lessThanOrEqual": "5.10.*", "status": "unaffected", "versionType": "semver"}, {"version": "5.15.210", "lessThanOrEqual": "5.15.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.1.176", "lessThanOrEqual": "6.1.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.6.143", "lessThanOrEqual": "6.6.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.12.93", "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": "3.13", "versionEndExcluding": "5.10.259"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "3.13", "versionEndExcluding": "5.15.210"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "3.13", "versionEndExcluding": "6.1.176"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "3.13", "versionEndExcluding": "6.6.143"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "3.13", "versionEndExcluding": "6.12.93"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "3.13", "versionEndExcluding": "6.18.34"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "3.13", "versionEndExcluding": "7.0.11"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "3.13", "versionEndExcluding": "7.1"}]}]}], "references": [{"url": "https://git.kernel.org/stable/c/c02aa6c0c9d1bea9bb75dea362b75ad225137bae"}, {"url": "https://git.kernel.org/stable/c/1595628a2f877d052eda18865ccf539392c47c04"}, {"url": "https://git.kernel.org/stable/c/6448a49344e87487b61bd88cb850cd694a0f576d"}, {"url": "https://git.kernel.org/stable/c/13493b00dd1e05a705981e052158652ea23eb482"}, {"url": "https://git.kernel.org/stable/c/94db72e9dac202e017ee3db22c59d17e4f3bf171"}, {"url": "https://git.kernel.org/stable/c/ede47988ac5687793745b17c1634a496a2299919"}, {"url": "https://git.kernel.org/stable/c/94a3d72cd9b21116d7c6d5bdc57c11401fc28557"}, {"url": "https://git.kernel.org/stable/c/f50487e3566358b2b982b7801945e858c78ad9ab"}], "title": "batman-adv: tvlv: reject oversized TVLV packets", "x_generator": {"engine": "bippy-1.2.0"}}}}

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{"bugzilla": {"description": "kernel: batman-adv: tvlv: reject oversized TVLV packets", "id": "2492114", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2492114"}, "csaw": false, "cwe": "CWE-190", "details": ["A flaw was found in the Linux kernel's batman-adv (Better Approach To Mobile Ad-hoc Networking - Advanced) module. An integer overflow vulnerability in the TVLV (Type-Length-Value) packet processing can lead to an undersized memory allocation. This allows a subsequent operation to write beyond the intended buffer, causing kernel memory corruption. This issue could potentially be exploited by an attacker to achieve a denial of service or, in some cases, arbitrary code execution."], "name": "CVE-2026-52934", "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-2026-52934\nhttps://nvd.nist.gov/vuln/detail/CVE-2026-52934\nhttps://lore.kernel.org/linux-cve-announce/2026062433-CVE-2026-52934-ad11@gregkh/T"]}

{"affected": [{"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[ef26157747d42254453f6b3ac2bd8bd3c53339c3,c02aa6c0c9d1bea9bb75dea362b75ad225137bae)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[ef26157747d42254453f6b3ac2bd8bd3c53339c3,1595628a2f877d052eda18865ccf539392c47c04)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[ef26157747d42254453f6b3ac2bd8bd3c53339c3,6448a49344e87487b61bd88cb850cd694a0f576d)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[ef26157747d42254453f6b3ac2bd8bd3c53339c3,13493b00dd1e05a705981e052158652ea23eb482)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[ef26157747d42254453f6b3ac2bd8bd3c53339c3,94db72e9dac202e017ee3db22c59d17e4f3bf171)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[ef26157747d42254453f6b3ac2bd8bd3c53339c3,ede47988ac5687793745b17c1634a496a2299919)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[ef26157747d42254453f6b3ac2bd8bd3c53339c3,94a3d72cd9b21116d7c6d5bdc57c11401fc28557)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[ef26157747d42254453f6b3ac2bd8bd3c53339c3,f50487e3566358b2b982b7801945e858c78ad9ab)"}}], "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": "3.13"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "generic", "value": "[0,3.13)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[5.10.259,5.11.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[5.15.210,5.16.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[6.1.176,6.2.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[6.6.143,6.7.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[6.12.93,6.13.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[7.0.11,7.1.0)"}}, {"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": "2026-06-24T13:15:15.276638+00:00", "updated": "2026-06-28T14:00:21.065994+00:00", "vendors": ["linux", "linux$PRODUCT$linux_kernel"]}