{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2025-38037","assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","state":"PUBLISHED","assignerShortName":"Linux","dateReserved":"2025-04-16T04:51:23.978Z","datePublished":"2025-06-18T09:33:23.551Z","dateUpdated":"2026-05-11T21:20:04.072Z"},"containers":{"cna":{"providerMetadata":{"orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","shortName":"Linux","dateUpdated":"2026-05-11T21:20:04.072Z"},"descriptions":[{"lang":"en","value":"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":[{"product":"Linux","vendor":"Linux","defaultStatus":"unaffected","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/net/vxlan/vxlan_core.c"],"versions":[{"version":"d342894c5d2f8c7df194c793ec4059656e09ca31","lessThan":"02a33b1035a307453a1da6ce0a1bf3676be287d7","status":"affected","versionType":"git"},{"version":"d342894c5d2f8c7df194c793ec4059656e09ca31","lessThan":"87d076987a9ba106c83412fcd113656f71af05a1","status":"affected","versionType":"git"},{"version":"d342894c5d2f8c7df194c793ec4059656e09ca31","lessThan":"e033da39fc6abbddab6c29624acef80757f273fa","status":"affected","versionType":"git"},{"version":"d342894c5d2f8c7df194c793ec4059656e09ca31","lessThan":"784b78295a3a58bf052339dd669e6e03710220d3","status":"affected","versionType":"git"},{"version":"d342894c5d2f8c7df194c793ec4059656e09ca31","lessThan":"13cba3f837903f7184d6e9b6137d5165ffe82a8f","status":"affected","versionType":"git"},{"version":"d342894c5d2f8c7df194c793ec4059656e09ca31","lessThan":"a6644aeb8ddf196dec5f8e782293c36f065df4d7","status":"affected","versionType":"git"},{"version":"d342894c5d2f8c7df194c793ec4059656e09ca31","lessThan":"4eceb7eae6ea7c950384c34e6dbbe872c981935f","status":"affected","versionType":"git"},{"version":"d342894c5d2f8c7df194c793ec4059656e09ca31","lessThan":"f6205f8215f12a96518ac9469ff76294ae7bd612","status":"affected","versionType":"git"}]},{"product":"Linux","vendor":"Linux","defaultStatus":"affected","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/net/vxlan/vxlan_core.c"],"versions":[{"version":"3.7","status":"affected"},{"version":"0","lessThan":"3.7","status":"unaffected","versionType":"semver"},{"version":"5.4.294","lessThanOrEqual":"5.4.*","status":"unaffected","versionType":"semver"},{"version":"5.10.238","lessThanOrEqual":"5.10.*","status":"unaffected","versionType":"semver"},{"version":"5.15.185","lessThanOrEqual":"5.15.*","status":"unaffected","versionType":"semver"},{"version":"6.1.141","lessThanOrEqual":"6.1.*","status":"unaffected","versionType":"semver"},{"version":"6.6.93","lessThanOrEqual":"6.6.*","status":"unaffected","versionType":"semver"},{"version":"6.12.31","lessThanOrEqual":"6.12.*","status":"unaffected","versionType":"semver"},{"version":"6.14.9","lessThanOrEqual":"6.14.*","status":"unaffected","versionType":"semver"},{"version":"6.15","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":"3.7","versionEndExcluding":"5.4.294"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"3.7","versionEndExcluding":"5.10.238"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"3.7","versionEndExcluding":"5.15.185"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"3.7","versionEndExcluding":"6.1.141"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"3.7","versionEndExcluding":"6.6.93"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"3.7","versionEndExcluding":"6.12.31"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"3.7","versionEndExcluding":"6.14.9"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"3.7","versionEndExcluding":"6.15"}]}]}],"references":[{"url":"https://git.kernel.org/stable/c/02a33b1035a307453a1da6ce0a1bf3676be287d7"},{"url":"https://git.kernel.org/stable/c/87d076987a9ba106c83412fcd113656f71af05a1"},{"url":"https://git.kernel.org/stable/c/e033da39fc6abbddab6c29624acef80757f273fa"},{"url":"https://git.kernel.org/stable/c/784b78295a3a58bf052339dd669e6e03710220d3"},{"url":"https://git.kernel.org/stable/c/13cba3f837903f7184d6e9b6137d5165ffe82a8f"},{"url":"https://git.kernel.org/stable/c/a6644aeb8ddf196dec5f8e782293c36f065df4d7"},{"url":"https://git.kernel.org/stable/c/4eceb7eae6ea7c950384c34e6dbbe872c981935f"},{"url":"https://git.kernel.org/stable/c/f6205f8215f12a96518ac9469ff76294ae7bd612"}],"title":"vxlan: Annotate FDB data races","x_generator":{"engine":"bippy-1.2.0"}},"adp":[{"title":"CVE Program Container","references":[{"url":"https://lists.debian.org/debian-lts-announce/2025/10/msg00008.html"},{"url":"https://lists.debian.org/debian-lts-announce/2025/10/msg00007.html"}],"providerMetadata":{"orgId":"af854a3a-2127-422b-91ae-364da2661108","shortName":"CVE","dateUpdated":"2025-11-03T17:33:16.449Z"}}]}}