{"id":"CVE-2026-43239","title":"smb: client: prevent races in ->query_interfaces()","summary":"In the Linux kernel, the following vulnerability has been resolved:\n\nsmb: client: prevent races in ->query_interfaces()\n\nIt was possible for two query interface works to be concurrently trying\nto update the interfaces.\n\nPrevent this by c…","severity":"high","cvss":8.8,"cvssVector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H","cvssSource":"cna","vendor":"Linux","product":"Linux","affected":["Linux >= aa45dadd34e44fcd6a9df4b395bee5b5633b4cec < 93e8e3ee165ae4609a1222b516b573837103d2c3","Linux >= aa45dadd34e44fcd6a9df4b395bee5b5633b4cec < ab6564f416a6eaf1199200b6100952407b438f7d","Linux >= aa45dadd34e44fcd6a9df4b395bee5b5633b4cec < 6287eefaf21ec805d42f941bd368018cf397a7f5","Linux >= aa45dadd34e44fcd6a9df4b395bee5b5633b4cec < 76cc4faba0343c6db945b8dc75425b33d633e1b8","Linux >= aa45dadd34e44fcd6a9df4b395bee5b5633b4cec < c3c06e42e1527716c54f3ad2ced6a034b5f3a489","Linux 5.19"],"ssvc":{"exploitation":"none","automatable":"no","technicalImpact":"total","timestamp":"2026-10-16T15:16:00.528244Z"},"published":"2026-05-06","updated":"2026-10-16","sourceUpdated":"2026-10-16T15:20:37.599Z","source":"CVEORG","sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2026-43239","references":[{"url":"https://git.kernel.org/stable/c/93e8e3ee165ae4609a1222b516b573837103d2c3"},{"url":"https://git.kernel.org/stable/c/ab6564f416a6eaf1199200b6100952407b438f7d"},{"url":"https://git.kernel.org/stable/c/6287eefaf21ec805d42f941bd368018cf397a7f5"},{"url":"https://git.kernel.org/stable/c/76cc4faba0343c6db945b8dc75425b33d633e1b8"},{"url":"https://git.kernel.org/stable/c/c3c06e42e1527716c54f3ad2ced6a034b5f3a489"}],"tags":["cve.org"],"epss":0.00354,"epssPercentile":0.27524,"ingestedAt":"2026-10-16T17:24:46.689Z","slug":"CVE-2026-43239","body":"## Overview\n\nIn the Linux kernel, the following vulnerability has been resolved:\n\nsmb: client: prevent races in ->query_interfaces()\n\nIt was possible for two query interface works to be concurrently trying\nto update the interfaces.\n\nPrevent this by checking and updating iface_last_update under\niface_lock.\n\n## Affected\n\n- `Linux >= aa45dadd34e44fcd6a9df4b395bee5b5633b4cec < 93e8e3ee165ae4609a1222b516b573837103d2c3`\n- `Linux >= aa45dadd34e44fcd6a9df4b395bee5b5633b4cec < ab6564f416a6eaf1199200b6100952407b438f7d`\n- `Linux >= aa45dadd34e44fcd6a9df4b395bee5b5633b4cec < 6287eefaf21ec805d42f941bd368018cf397a7f5`\n- `Linux >= aa45dadd34e44fcd6a9df4b395bee5b5633b4cec < 76cc4faba0343c6db945b8dc75425b33d633e1b8`\n- `Linux >= aa45dadd34e44fcd6a9df4b395bee5b5633b4cec < c3c06e42e1527716c54f3ad2ced6a034b5f3a489`\n- `Linux 5.19`\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.","depth":"twilight","depthScore":48,"depthScoreParts":{"impact":48.4,"likelihood":0.1,"exploitation":0,"ransomware":0},"changes":[]}