{ "schemaVersion": 1, "attribution": [ { "source": "CISA Known Exploited Vulnerabilities", "url": "https://www.cisa.gov/known-exploited-vulnerabilities-catalog", "licence": "US government work" }, { "source": "GitHub Advisory Database", "url": "https://github.com/advisories", "licence": "CC BY 4.0" }, { "source": "Have I Been Pwned", "url": "https://haveibeenpwned.com/", "licence": "CC BY 4.0" }, { "source": "CVE Program (CVE records)", "url": "https://www.cve.org/Legal/TermsOfUse", "licence": "CVE Terms of Use", "notice": "Copyright © 1999-2026, The MITRE Corporation. CVE is a trademark and the CVE logo is a registered trademark of The MITRE Corporation.", "terms": "CVE Usage: MITRE hereby grants you a perpetual, worldwide, non-exclusive, no-charge, royalty-free, irrevocable copyright license to reproduce, prepare derivative works of, publicly display, publicly perform, sublicense, and distribute Common Vulnerabilities and Exposures (CVE™). Any copy you make for such purposes is authorized provided that you reproduce MITRE's copyright designation and this license in any such copy." }, { "source": "FIRST EPSS", "url": "https://www.first.org/epss/", "licence": "free to use; FIRST requests attribution" } ], "record": { "id": "CVE-2025-38037", "sourceURL": "https://www.cve.org/CVERecord?id=CVE-2025-38037", "idYear": 2025, "status": "PUBLISHED", "publishedAt": "2025-06-18T09:33:23.551Z", "updatedAt": "2026-05-11T21:20:04.072Z", "importedAt": "2026-10-24T01:57:34.152Z", "snapshot": { "id": "cve_2026-10-24_midnight_baseline", "at": "2026-10-24T00:00:00.000Z", "source": "https://github.com/CVEProject/cvelistV5/releases/tag/cve_2026-10-24_0100Z" }, "facts": { "title": "vxlan: Annotate FDB data races", "summary": "In the Linux kernel, the following vulnerability has been resolved:\n\nvxlan: Annotate FDB data races\n\nThe 'used' and 'updated' fields in the FDB entry structure can be\naccessed concurrently by multiple threads, leading to reports such as\n[1]. Can be reproduced using [2].\n\nSuppress these reports by annotating these accesses using\nREAD_ONCE() / WRITE_ONCE().\n\n[1]\nBUG: KCSAN: data-race in vxlan_xmit / vxlan_xmit\n\nwrite to 0xffff942604d263a8 of 8 bytes by task 286 on cpu 0:\n vxlan_xmit+0xb29/0x2380\n dev_hard_start_xmit+0x84/0x2f0\n __dev_queue_xmit+0x45a/0x1650\n packet_xmit+0x100/0x150\n packet_sendmsg+0x2114/0x2ac0\n __sys_sendto+0x318/0x330\n __x64_sys_sendto+0x76/0x90\n x64_sys_call+0x14e8/0x1c00\n do_syscall_64+0x9e/0x1a0\n entry_SYSCALL_64_after_hwframe+0x77/0x7f\n\nread to 0xffff942604d263a8 of 8 bytes by task 287 on cpu 2:\n vxlan_xmit+0xadf/0x2380\n dev_hard_start_xmit+0x84/0x2f0\n __dev_queue_xmit+0x45a/0x1650\n packet_xmit+0x100/0x150\n packet_sendmsg+0x2114/0x2ac0\n __sys_sendto+0x318/0x330\n __x64_sys_sendto+0x76/0x90\n x64_sys_call+0x14e8/0x1c00\n do_syscall_64+0x9e/0x1a0\n entry_SYSCALL_64_after_hwframe+0x77/0x7f\n\nvalue changed: 0x00000000fffbac6e -> 0x00000000fffbac6f\n\nReported by Kernel Concurrency Sanitizer on:\nCPU: 2 UID: 0 PID: 287 Comm: mausezahn Not tainted 6.13.0-rc7-01544-gb4b270f11a02 #5\nHardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.16.3-3.fc41 04/01/2014\n\n[2]\n #!/bin/bash\n\n set +H\n echo whitelist > /sys/kernel/debug/kcsan\n echo !vxlan_xmit > /sys/kernel/debug/kcsan\n\n ip link add name vx0 up type vxlan id 10010 dstport 4789 local 192.0.2.1\n bridge fdb add 00:11:22:33:44:55 dev vx0 self static dst 198.51.100.1\n taskset -c 0 mausezahn vx0 -a own -b 00:11:22:33:44:55 -c 0 -q &\n taskset -c 2 mausezahn vx0 -a own -b 00:11:22:33:44:55 -c 0 -q &", "affected": [ { "vendor": "Linux", "product": "Linux", "defaultStatus": "unaffected", "versions": [ { "version": "d342894c5d2f8c7df194c793ec4059656e09ca31", "status": "affected", "versionType": "git", "lessThan": "02a33b1035a307453a1da6ce0a1bf3676be287d7" }, { "version": "d342894c5d2f8c7df194c793ec4059656e09ca31", "status": "affected", "versionType": "git", "lessThan": "87d076987a9ba106c83412fcd113656f71af05a1" }, { "version": "d342894c5d2f8c7df194c793ec4059656e09ca31", "status": "affected", "versionType": "git", "lessThan": "e033da39fc6abbddab6c29624acef80757f273fa" }, { "version": "d342894c5d2f8c7df194c793ec4059656e09ca31", "status": "affected", "versionType": "git", "lessThan": "784b78295a3a58bf052339dd669e6e03710220d3" }, { "version": "d342894c5d2f8c7df194c793ec4059656e09ca31", "status": "affected", "versionType": "git", "lessThan": "13cba3f837903f7184d6e9b6137d5165ffe82a8f" }, { "version": "d342894c5d2f8c7df194c793ec4059656e09ca31", "status": "affected", "versionType": "git", "lessThan": "a6644aeb8ddf196dec5f8e782293c36f065df4d7" }, { "version": "d342894c5d2f8c7df194c793ec4059656e09ca31", "status": "affected", "versionType": "git", "lessThan": "4eceb7eae6ea7c950384c34e6dbbe872c981935f" }, { "version": "d342894c5d2f8c7df194c793ec4059656e09ca31", "status": "affected", "versionType": "git", "lessThan": "f6205f8215f12a96518ac9469ff76294ae7bd612" } ] }, { "vendor": "Linux", "product": "Linux", "defaultStatus": "affected", "versions": [ { "version": "3.7", "status": "affected" }, { "version": "0", "status": "unaffected", "versionType": "semver", "lessThan": "3.7" }, { "version": "5.4.294", "status": "unaffected", "versionType": "semver", "lessThanOrEqual": "5.4.*" }, { "version": "5.10.238", "status": "unaffected", "versionType": "semver", "lessThanOrEqual": "5.10.*" }, { "version": "5.15.185", "status": "unaffected", "versionType": "semver", "lessThanOrEqual": "5.15.*" }, { "version": "6.1.141", "status": "unaffected", "versionType": "semver", "lessThanOrEqual": "6.1.*" }, { "version": "6.6.93", "status": "unaffected", "versionType": "semver", "lessThanOrEqual": "6.6.*" }, { "version": "6.12.31", "status": "unaffected", "versionType": "semver", "lessThanOrEqual": "6.12.*" }, { "version": "6.14.9", "status": "unaffected", "versionType": "semver", "lessThanOrEqual": "6.14.*" }, { "version": "6.15", "status": "unaffected", "versionType": "original_commit_for_fix", "lessThanOrEqual": "*" } ] } ] } } }