CVE-2026-93204

{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-93204", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2026-09-17T16:02:15.093Z", "datePublished": "2026-09-17T16:12:24.403Z", "dateUpdated": "2026-10-19T09:07:16.519Z"}, "containers": {"cna": {"providerMetadata": {"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-10-19T09:07:16.519Z"}, "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nbatman-adv: dat: atomically update mac addresses\n\nWhen a MAC address is updated in batadv_dat_entry_add(), it is done using a\nsimple copy function. A parallel reader might only see parts of this\nupdate. In worst case, the reader is transporting the half updated MAC\naddress over the network or is creating an ARP response using it -\npoisoning the ARP cache.\n\natomic64_t can be used to store the 48 bit of a mac address. A reader will\nthen either see the old mac address or the new one - never a mixture of\nboth."}], "affected": [{"product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["net/batman-adv/distributed-arp-table.c", "net/batman-adv/types.h"], "versions": [{"version": "2f1dfbe185075a50dc8f0490a136377af53a1c62", "lessThan": "181012b3d29c51197c235ee5871fc7512c736855", "status": "affected", "versionType": "git"}, {"version": "2f1dfbe185075a50dc8f0490a136377af53a1c62", "lessThan": "159360a0de831845c4500b4f8638decdcd624040", "status": "affected", "versionType": "git"}, {"version": "2f1dfbe185075a50dc8f0490a136377af53a1c62", "lessThan": "259db2c04586d40b82c5c3002b1e28b0698a0bb7", "status": "affected", "versionType": "git"}, {"version": "2f1dfbe185075a50dc8f0490a136377af53a1c62", "lessThan": "1674855a5b6eacfe35f4db3095d7055c25467274", "status": "affected", "versionType": "git"}, {"version": "2f1dfbe185075a50dc8f0490a136377af53a1c62", "lessThan": "66238e2a74eca5dabf85b0cd2c3c944e474dc2fd", "status": "affected", "versionType": "git"}, {"version": "2f1dfbe185075a50dc8f0490a136377af53a1c62", "lessThan": "a5e4d6cb4f6848b8906c1c493f99a8ccc0638515", "status": "affected", "versionType": "git"}, {"version": "2f1dfbe185075a50dc8f0490a136377af53a1c62", "lessThan": "f68038c77a2f38c09c7e2e4f7fa1f4e246fdf2c9", "status": "affected", "versionType": "git"}, {"version": "2f1dfbe185075a50dc8f0490a136377af53a1c62", "lessThan": "e6de568d3eda3e3c01c868fabd7a9535d5ee4a73", "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/distributed-arp-table.c", "net/batman-adv/types.h"], "versions": [{"version": "3.8", "status": "affected"}, {"version": "0", "lessThan": "3.8", "status": "unaffected", "versionType": "semver"}, {"version": "5.10.271", "lessThanOrEqual": "5.10.*", "status": "unaffected", "versionType": "semver"}, {"version": "5.15.221", "lessThanOrEqual": "5.15.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.1.188", "lessThanOrEqual": "6.1.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.6.157", "lessThanOrEqual": "6.6.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.12.110", "lessThanOrEqual": "6.12.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.18.52", "lessThanOrEqual": "6.18.*", "status": "unaffected", "versionType": "semver"}, {"version": "7.2.6", "lessThanOrEqual": "7.2.*", "status": "unaffected", "versionType": "semver"}, {"version": "7.3", "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": "3.8", "versionEndExcluding": "5.10.271"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "3.8", "versionEndExcluding": "5.15.221"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "3.8", "versionEndExcluding": "6.1.188"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "3.8", "versionEndExcluding": "6.6.157"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "3.8", "versionEndExcluding": "6.12.110"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "3.8", "versionEndExcluding": "6.18.52"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "3.8", "versionEndExcluding": "7.2.6"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "3.8", "versionEndExcluding": "7.3"}]}]}], "references": [{"url": "https://git.kernel.org/stable/c/181012b3d29c51197c235ee5871fc7512c736855"}, {"url": "https://git.kernel.org/stable/c/159360a0de831845c4500b4f8638decdcd624040"}, {"url": "https://git.kernel.org/stable/c/259db2c04586d40b82c5c3002b1e28b0698a0bb7"}, {"url": "https://git.kernel.org/stable/c/1674855a5b6eacfe35f4db3095d7055c25467274"}, {"url": "https://git.kernel.org/stable/c/66238e2a74eca5dabf85b0cd2c3c944e474dc2fd"}, {"url": "https://git.kernel.org/stable/c/a5e4d6cb4f6848b8906c1c493f99a8ccc0638515"}, {"url": "https://git.kernel.org/stable/c/f68038c77a2f38c09c7e2e4f7fa1f4e246fdf2c9"}, {"url": "https://git.kernel.org/stable/c/e6de568d3eda3e3c01c868fabd7a9535d5ee4a73"}], "title": "batman-adv: dat: atomically update mac addresses", "x_generator": {"engine": "bippy-1.2.0"}}}}

{}

{"affected": [{"affectedData": [{"defaultStatus": "unaffected", "product": "Linux", "programFiles": ["net/batman-adv/distributed-arp-table.c", "net/batman-adv/types.h"], "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "versions": [{"lessThan": "181012b3d29c51197c235ee5871fc7512c736855", "status": "affected", "version": "2f1dfbe185075a50dc8f0490a136377af53a1c62", "versionType": "git"}, {"lessThan": "159360a0de831845c4500b4f8638decdcd624040", "status": "affected", "version": "2f1dfbe185075a50dc8f0490a136377af53a1c62", "versionType": "git"}, {"lessThan": "259db2c04586d40b82c5c3002b1e28b0698a0bb7", "status": "affected", "version": "2f1dfbe185075a50dc8f0490a136377af53a1c62", "versionType": "git"}, {"lessThan": "1674855a5b6eacfe35f4db3095d7055c25467274", "status": "affected", "version": "2f1dfbe185075a50dc8f0490a136377af53a1c62", "versionType": "git"}, {"lessThan": "66238e2a74eca5dabf85b0cd2c3c944e474dc2fd", "status": "affected", "version": "2f1dfbe185075a50dc8f0490a136377af53a1c62", "versionType": "git"}, {"lessThan": "a5e4d6cb4f6848b8906c1c493f99a8ccc0638515", "status": "affected", "version": "2f1dfbe185075a50dc8f0490a136377af53a1c62", "versionType": "git"}, {"lessThan": "f68038c77a2f38c09c7e2e4f7fa1f4e246fdf2c9", "status": "affected", "version": "2f1dfbe185075a50dc8f0490a136377af53a1c62", "versionType": "git"}, {"lessThan": "e6de568d3eda3e3c01c868fabd7a9535d5ee4a73", "status": "affected", "version": "2f1dfbe185075a50dc8f0490a136377af53a1c62", "versionType": "git"}]}, {"defaultStatus": "affected", "product": "Linux", "programFiles": ["net/batman-adv/distributed-arp-table.c", "net/batman-adv/types.h"], "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "versions": [{"status": "affected", "version": "3.8"}, {"lessThan": "3.8", "status": "unaffected", "version": "0", "versionType": "semver"}, {"lessThanOrEqual": "5.10.*", "status": "unaffected", "version": "5.10.271", "versionType": "semver"}, {"lessThanOrEqual": "5.15.*", "status": "unaffected", "version": "5.15.221", "versionType": "semver"}, {"lessThanOrEqual": "6.1.*", "status": "unaffected", "version": "6.1.188", "versionType": "semver"}, {"lessThanOrEqual": "6.6.*", "status": "unaffected", "version": "6.6.157", "versionType": "semver"}, {"lessThanOrEqual": "6.12.*", "status": "unaffected", "version": "6.12.110", "versionType": "semver"}, {"lessThanOrEqual": "6.18.*", "status": "unaffected", "version": "6.18.52", "versionType": "semver"}, {"lessThanOrEqual": "7.2.*", "status": "unaffected", "version": "7.2.6", "versionType": "semver"}, {"lessThanOrEqual": "*", "status": "unaffected", "version": "7.3", "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: dat: atomically update mac addresses\n\nWhen a MAC address is updated in batadv_dat_entry_add(), it is done using a\nsimple copy function. A parallel reader might only see parts of this\nupdate. In worst case, the reader is transporting the half updated MAC\naddress over the network or is creating an ARP response using it -\npoisoning the ARP cache.\n\natomic64_t can be used to store the 48 bit of a mac address. A reader will\nthen either see the old mac address or the new one - never a mixture of\nboth."}], "id": "CVE-2026-93204", "lastModified": "2026-10-19T10:17:11.140", "metrics": {}, "published": "2026-09-17T17:18:16.773", "references": [{"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/159360a0de831845c4500b4f8638decdcd624040"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/1674855a5b6eacfe35f4db3095d7055c25467274"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/181012b3d29c51197c235ee5871fc7512c736855"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/259db2c04586d40b82c5c3002b1e28b0698a0bb7"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/66238e2a74eca5dabf85b0cd2c3c944e474dc2fd"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/a5e4d6cb4f6848b8906c1c493f99a8ccc0638515"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/e6de568d3eda3e3c01c868fabd7a9535d5ee4a73"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/f68038c77a2f38c09c7e2e4f7fa1f4e246fdf2c9"}], "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "vulnStatus": "Received"}

{}

{"affected": [{"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[2f1dfbe185075a50dc8f0490a136377af53a1c62,159360a0de831845c4500b4f8638decdcd624040)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[2f1dfbe185075a50dc8f0490a136377af53a1c62,259db2c04586d40b82c5c3002b1e28b0698a0bb7)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[2f1dfbe185075a50dc8f0490a136377af53a1c62,1674855a5b6eacfe35f4db3095d7055c25467274)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[2f1dfbe185075a50dc8f0490a136377af53a1c62,66238e2a74eca5dabf85b0cd2c3c944e474dc2fd)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[2f1dfbe185075a50dc8f0490a136377af53a1c62,a5e4d6cb4f6848b8906c1c493f99a8ccc0638515)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[2f1dfbe185075a50dc8f0490a136377af53a1c62,f68038c77a2f38c09c7e2e4f7fa1f4e246fdf2c9)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[2f1dfbe185075a50dc8f0490a136377af53a1c62,e6de568d3eda3e3c01c868fabd7a9535d5ee4a73)"}}], "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": "3.8"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "generic", "value": "[0,3.8)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "generic", "value": "[5.15.221,5.15.*]"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "generic", "value": "[6.1.188,6.1.*]"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "generic", "value": "[6.6.157,6.6.*]"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "generic", "value": "[6.12.110,6.12.*]"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "generic", "value": "[6.18.52,6.18.*]"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "generic", "value": "[7.2.6,7.2.*]"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "generic", "value": "[7.3-rc1,*]"}}], "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": "2026-09-19T08:15:14.039062+00:00", "updated": "2026-09-19T20:45:17.668405+00:00", "vendors": ["linux", "linux$PRODUCT$linux_kernel"], "weaknesses": ["CWE-362"]}