{"id":"CVE-2025-38108","title":"In the Linux kernel, the following vulnerability has been resolved:\n\nnet_sched: red: fix a race in __red_change()\n\nGerrard Tai reported a race condition in RED, whenever SFQ perturb timer\nfires at the wrong time.\n\nThe race is as follows:…","summary":"In the Linux kernel, the following vulnerability has been resolved:\n\nnet_sched: red: fix a race in __red_change()\n\nGerrard Tai reported a race condition in RED, whenever SFQ perturb timer\nfires at the wrong time.\n\nThe race is as follows:…","severity":"high","cvss":7.8,"cvssVector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","cwe":["CWE-362"],"vendor":"linux","product":"linux_kernel","affected":["linux_kernel >= 5.0, < 5.4.295","linux_kernel >= 5.5, < 5.10.239","linux_kernel >= 5.11, < 5.15.186","linux_kernel >= 5.16, < 6.1.142","linux_kernel >= 6.2, < 6.6.94","linux_kernel >= 6.7, < 6.12.34","linux_kernel >= 6.13, < 6.15.3","linux_kernel = 6.16","debian_linux = 11.0"],"patched":["linux_kernel 6.15.3"],"published":"2025-07-03","updated":"2026-10-15","sourceUpdated":"2026-10-15T22:18:27.337","source":"NVD","sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2025-38108","references":[{"url":"https://git.kernel.org/stable/c/110a47efcf23438ff8d31dbd9c854fae2a48bf98","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/2790c4ec481be45a80948d059cd7c9a06bc37493","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/2a71924ca4af59ffc00f0444732b6cd54b153d0e","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/444ad445df5496a785705019268a8a84b84484bb","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/4b755305b2b0618e857fdadb499365b5f2e478d1","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/85a3e0ede38450ea3053b8c45d28cf55208409b8","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/a1bf6a4e9264a685b0e642994031f9c5aad72414","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/f569984417a4e12c67366e69bdcb752970de921d","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://lists.debian.org/debian-lts-announce/2025/10/msg00007.html","label":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://lists.debian.org/debian-lts-announce/2025/10/msg00008.html","label":"af854a3a-2127-422b-91ae-364da2661108"}],"tags":["nvd","cve.org"],"epss":0.00157,"epssPercentile":0.04811,"ssvc":{"exploitation":"none","automatable":"no","technicalImpact":"total","timestamp":"2026-10-15T21:47:28.023257Z"},"ingestedAt":"2026-10-15T22:48:25.492Z","slug":"CVE-2025-38108","body":"## Overview\n\nIn the Linux kernel, the following vulnerability has been resolved:\n\nnet_sched: red: fix a race in __red_change()\n\nGerrard Tai reported a race condition in RED, whenever SFQ perturb timer\nfires at the wrong time.\n\nThe race is as follows:\n\nCPU 0                                 CPU 1\n[1]: lock root\n[2]: qdisc_tree_flush_backlog()\n[3]: unlock root\n |\n |                                    [5]: lock root\n |                                    [6]: rehash\n |                                    [7]: qdisc_tree_reduce_backlog()\n |\n[4]: qdisc_put()\n\nThis can be abused to underflow a parent's qlen.\n\nCalling qdisc_purge_queue() instead of qdisc_tree_flush_backlog()\nshould fix the race, because all packets will be purged from the qdisc\nbefore releasing the lock.\n\n## Affected\n\n- `linux_kernel >= 5.0, < 5.4.295`\n- `linux_kernel >= 5.5, < 5.10.239`\n- `linux_kernel >= 5.11, < 5.15.186`\n- `linux_kernel >= 5.16, < 6.1.142`\n- `linux_kernel >= 6.2, < 6.6.94`\n- `linux_kernel >= 6.7, < 6.12.34`\n- `linux_kernel >= 6.13, < 6.15.3`\n- `linux_kernel = 6.16`\n- `debian_linux = 11.0`\n\n## Remediation\n\nUpgrade past the affected range:\n\n- `linux_kernel 6.15.3`","depth":"twilight","depthScore":43,"depthScoreParts":{"impact":42.9,"likelihood":0,"exploitation":0,"ransomware":0},"changes":[]}