{ "dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": { "cveId": "CVE-2025-68336", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2025-12-16T14:48:05.297Z", "datePublished": "2025-12-22T16:14:13.425Z", "dateUpdated": "2026-08-05T12:10:54.280Z" }, "containers": { "cna": { "providerMetadata": { "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-08-05T12:10:54.280Z" }, "descriptions": [ { "lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nlocking/spinlock/debug: Fix data-race in do_raw_write_lock\n\nKCSAN reports:\n\nBUG: KCSAN: data-race in do_raw_write_lock / do_raw_write_lock\n\nwrite (marked) to 0xffff800009cf504c of 4 bytes by task 1102 on cpu 1:\n do_raw_write_lock+0x120/0x204\n _raw_write_lock_irq\n do_exit\n call_usermodehelper_exec_async\n ret_from_fork\n\nread to 0xffff800009cf504c of 4 bytes by task 1103 on cpu 0:\n do_raw_write_lock+0x88/0x204\n _raw_write_lock_irq\n do_exit\n call_usermodehelper_exec_async\n ret_from_fork\n\nvalue changed: 0xffffffff -> 0x00000001\n\nReported by Kernel Concurrency Sanitizer on:\nCPU: 0 PID: 1103 Comm: kworker/u4:1 6.1.111\n\nCommit 1a365e822372 (\"locking/spinlock/debug: Fix various data races\") has\nadressed most of these races, but seems to be not consistent/not complete.\n\n>From do_raw_write_lock() only debug_write_lock_after() part has been\nconverted to WRITE_ONCE(), but not debug_write_lock_before() part.\nDo it now." } ], "metrics": [ { "cvssV3_1": { "version": "3.1", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H", "baseScore": 7.5, "baseSeverity": "HIGH" }, "scenarios": [ { "lang": "en", "value": "AV:N - An unauthenticated remote peer can open and terminate concurrent TCP/445 connections to an enabled ksmbd server; its per-connection kthreads exit through do_exit(), tasklist_lock, and do_raw_write_lock().\nAC:L - The attacker controls both sides of the race using simultaneous connections and can repeat attempts until it occurs, without requiring victim-controlled state.\nPR:N - Ksmbd creates connection-handler threads before SMB authentication, so the remote attacker requires neither an account nor kernel privileges.\nUI:N - Once the server is listening, remote connections trigger the complete vulnerable path without victim interaction.\nS:U - A resulting kernel panic or lockup affects the same host security authority and does not cross a virtualization or sandbox boundary.\nC:N - The race concerns in-bounds debug owner bookkeeping and provides no memory-disclosure or arbitrary-read primitive.\nI:N - The actual rwlock and protected data are not corrupted; the fix only annotates existing reads and does not address an overwrite, use-after-free, or control-flow primitive.\nA:H - On DEBUG_SPINLOCK and KCSAN builds, repeated races can generate reports that panic through panic_on_warn or deadlock the console, causing complete system unavailability." } ] } ], "affected": [ { "product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": [ "kernel/locking/spinlock_debug.c" ], "versions": [ { "version": "1a365e822372ba24c9da0822bc583894f6f3d821", "lessThan": "8e5b2cf10844402054b52b489b525dc30cc16908", "status": "affected", "versionType": "git" }, { "version": "1a365e822372ba24c9da0822bc583894f6f3d821", "lessThan": "c228cb699a07a5f2d596d186bc5c314c99bb8bbf", "status": "affected", "versionType": "git" }, { "version": "1a365e822372ba24c9da0822bc583894f6f3d821", "lessThan": "93bd23524d63deb80fb85beb2e43fafeb1043d0f", "status": "affected", "versionType": "git" }, { "version": "1a365e822372ba24c9da0822bc583894f6f3d821", "lessThan": "39d2ef113416f1a4205b03fb0aa2e428d1412c77", "status": "affected", "versionType": "git" }, { "version": "1a365e822372ba24c9da0822bc583894f6f3d821", "lessThan": "b163a5e8c703201c905d6ec7920ed79d167e8442", "status": "affected", "versionType": "git" }, { "version": "1a365e822372ba24c9da0822bc583894f6f3d821", "lessThan": "16b3590c0e1e615757dade098c8fbc0d4f040c76", "status": "affected", "versionType": "git" }, { "version": "1a365e822372ba24c9da0822bc583894f6f3d821", "lessThan": "396a9270a7b90886be501611b13aa636f2e8c703", "status": "affected", "versionType": "git" }, { "version": "1a365e822372ba24c9da0822bc583894f6f3d821", "lessThan": "c14ecb555c3ee80eeb030a4e46d00e679537f03a", "status": "affected", "versionType": "git" }, { "version": "3106fb78d3579c8e9c9b3040f7f7841981919624", "status": "affected", "versionType": "git" }, { "version": "c0911024ff927ba5c4786b507004cb615be1d776", "status": "affected", "versionType": "git" }, { "version": "09226e5c38639437565af01e6009a9286a351d04", "status": "affected", "versionType": "git" }, { "version": "c7673f01604fa722b9d7c1e29e17cec1b8ae09c5", "status": "affected", "versionType": "git" }, { "version": "c120c3dbeb76305235c8e557f84d9e2d7d0f5933", "status": "affected", "versionType": "git" }, { "version": "4.4.209", "lessThan": "4.5", "status": "affected", "versionType": "semver" }, { "version": "4.9.209", "lessThan": "4.10", "status": "affected", "versionType": "semver" }, { "version": "4.14.164", "lessThan": "4.15", "status": "affected", "versionType": "semver" }, { "version": "4.19.95", "lessThan": "4.20", "status": "affected", "versionType": "semver" }, { "version": "5.4.11", "lessThan": "5.5", "status": "affected", "versionType": "semver" } ] }, { "product": "Linux", "vendor": "Linux", "defaultStatus": "affected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": [ "kernel/locking/spinlock_debug.c" ], "versions": [ { "version": "5.5", "status": "affected" }, { "version": "0", "lessThan": "5.5", "status": "unaffected", "versionType": "semver" }, { "version": "5.10.248", "lessThanOrEqual": "5.10.*", "status": "unaffected", "versionType": "semver" }, { "version": "5.15.198", "lessThanOrEqual": "5.15.*", "status": "unaffected", "versionType": "semver" }, { "version": "6.1.160", "lessThanOrEqual": "6.1.*", "status": "unaffected", "versionType": "semver" }, { "version": "6.6.120", "lessThanOrEqual": "6.6.*", "status": "unaffected", "versionType": "semver" }, { "version": "6.12.62", "lessThanOrEqual": "6.12.*", "status": "unaffected", "versionType": "semver" }, { "version": "6.17.12", "lessThanOrEqual": "6.17.*", "status": "unaffected", "versionType": "semver" }, { "version": "6.18.1", "lessThanOrEqual": "6.18.*", "status": "unaffected", "versionType": "semver" }, { "version": "6.19", "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": "5.5", "versionEndExcluding": "5.10.248" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.5", "versionEndExcluding": "5.15.198" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.5", "versionEndExcluding": "6.1.160" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.5", "versionEndExcluding": "6.6.120" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.5", "versionEndExcluding": "6.12.62" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.5", "versionEndExcluding": "6.17.12" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.5", "versionEndExcluding": "6.18.1" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.5", "versionEndExcluding": "6.19" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.4.209" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.9.209" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.14.164" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.19.95" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.4.11" } ] } ] } ], "references": [ { "url": "https://git.kernel.org/stable/c/8e5b2cf10844402054b52b489b525dc30cc16908" }, { "url": "https://git.kernel.org/stable/c/c228cb699a07a5f2d596d186bc5c314c99bb8bbf" }, { "url": "https://git.kernel.org/stable/c/93bd23524d63deb80fb85beb2e43fafeb1043d0f" }, { "url": "https://git.kernel.org/stable/c/39d2ef113416f1a4205b03fb0aa2e428d1412c77" }, { "url": "https://git.kernel.org/stable/c/b163a5e8c703201c905d6ec7920ed79d167e8442" }, { "url": "https://git.kernel.org/stable/c/16b3590c0e1e615757dade098c8fbc0d4f040c76" }, { "url": "https://git.kernel.org/stable/c/396a9270a7b90886be501611b13aa636f2e8c703" }, { "url": "https://git.kernel.org/stable/c/c14ecb555c3ee80eeb030a4e46d00e679537f03a" } ], "title": "locking/spinlock/debug: Fix data-race in do_raw_write_lock", "x_generator": { "engine": "bippy-1.2.0" } } } }