{ "dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": { "cveId": "CVE-2025-68258", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2025-12-16T13:41:40.267Z", "datePublished": "2025-12-16T14:45:00.920Z", "dateUpdated": "2026-05-11T21:49:53.691Z" }, "containers": { "cna": { "providerMetadata": { "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-05-11T21:49:53.691Z" }, "descriptions": [ { "lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\ncomedi: multiq3: sanitize config options in multiq3_attach()\n\nSyzbot identified an issue [1] in multiq3_attach() that induces a\ntask timeout due to open() or COMEDI_DEVCONFIG ioctl operations,\nspecifically, in the case of multiq3 driver.\n\nThis problem arose when syzkaller managed to craft weird configuration\noptions used to specify the number of channels in encoder subdevice.\nIf a particularly great number is passed to s->n_chan in\nmultiq3_attach() via it->options[2], then multiple calls to\nmultiq3_encoder_reset() at the end of driver-specific attach() method\nwill be running for minutes, thus blocking tasks and affected devices\nas well.\n\nWhile this issue is most likely not too dangerous for real-life\ndevices, it still makes sense to sanitize configuration inputs. Enable\na sensible limit on the number of encoder chips (4 chips max, each\nwith 2 channels) to stop this behaviour from manifesting.\n\n[1] Syzbot crash:\nINFO: task syz.2.19:6067 blocked for more than 143 seconds.\n...\nCall Trace:\n \n context_switch kernel/sched/core.c:5254 [inline]\n __schedule+0x17c4/0x4d60 kernel/sched/core.c:6862\n __schedule_loop kernel/sched/core.c:6944 [inline]\n schedule+0x165/0x360 kernel/sched/core.c:6959\n schedule_preempt_disabled+0x13/0x30 kernel/sched/core.c:7016\n __mutex_lock_common kernel/locking/mutex.c:676 [inline]\n __mutex_lock+0x7e6/0x1350 kernel/locking/mutex.c:760\n comedi_open+0xc0/0x590 drivers/comedi/comedi_fops.c:2868\n chrdev_open+0x4cc/0x5e0 fs/char_dev.c:414\n do_dentry_open+0x953/0x13f0 fs/open.c:965\n vfs_open+0x3b/0x340 fs/open.c:1097\n..." } ], "affected": [ { "product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": [ "drivers/comedi/drivers/multiq3.c" ], "versions": [ { "version": "77e01cdbad5175f56027fd6fae00bd0fc175651a", "lessThan": "f9ff87aac7b37d462246c46d28912d382a8e2ea6", "status": "affected", "versionType": "git" }, { "version": "77e01cdbad5175f56027fd6fae00bd0fc175651a", "lessThan": "4cde9a7e025cc09b88097c70606f6b30c22880f4", "status": "affected", "versionType": "git" }, { "version": "77e01cdbad5175f56027fd6fae00bd0fc175651a", "lessThan": "ad7ed3c9c7b8408e8612697bc43a5441fe386c71", "status": "affected", "versionType": "git" }, { "version": "77e01cdbad5175f56027fd6fae00bd0fc175651a", "lessThan": "049f14557450351750f929ebfff36d849511e132", "status": "affected", "versionType": "git" }, { "version": "77e01cdbad5175f56027fd6fae00bd0fc175651a", "lessThan": "8952bc1973cd54158c35e06bfb8c29ace7375a48", "status": "affected", "versionType": "git" }, { "version": "77e01cdbad5175f56027fd6fae00bd0fc175651a", "lessThan": "8dc2f02d3bada9247f00bfd2e5f61f68c389a0a3", "status": "affected", "versionType": "git" }, { "version": "77e01cdbad5175f56027fd6fae00bd0fc175651a", "lessThan": "543f4c380c2e1f35e60528df7cb54705cda7fee3", "status": "affected", "versionType": "git" }, { "version": "77e01cdbad5175f56027fd6fae00bd0fc175651a", "lessThan": "f24c6e3a39fa355dabfb684c9ca82db579534e72", "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/comedi/drivers/multiq3.c" ], "versions": [ { "version": "2.6.30", "status": "affected" }, { "version": "0", "lessThan": "2.6.30", "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": "2.6.30", "versionEndExcluding": "5.10.248" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "2.6.30", "versionEndExcluding": "5.15.198" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "2.6.30", "versionEndExcluding": "6.1.160" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "2.6.30", "versionEndExcluding": "6.6.120" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "2.6.30", "versionEndExcluding": "6.12.62" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "2.6.30", "versionEndExcluding": "6.17.12" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "2.6.30", "versionEndExcluding": "6.18.1" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "2.6.30", "versionEndExcluding": "6.19" } ] } ] } ], "references": [ { "url": "https://git.kernel.org/stable/c/f9ff87aac7b37d462246c46d28912d382a8e2ea6" }, { "url": "https://git.kernel.org/stable/c/4cde9a7e025cc09b88097c70606f6b30c22880f4" }, { "url": "https://git.kernel.org/stable/c/ad7ed3c9c7b8408e8612697bc43a5441fe386c71" }, { "url": "https://git.kernel.org/stable/c/049f14557450351750f929ebfff36d849511e132" }, { "url": "https://git.kernel.org/stable/c/8952bc1973cd54158c35e06bfb8c29ace7375a48" }, { "url": "https://git.kernel.org/stable/c/8dc2f02d3bada9247f00bfd2e5f61f68c389a0a3" }, { "url": "https://git.kernel.org/stable/c/543f4c380c2e1f35e60528df7cb54705cda7fee3" }, { "url": "https://git.kernel.org/stable/c/f24c6e3a39fa355dabfb684c9ca82db579534e72" } ], "title": "comedi: multiq3: sanitize config options in multiq3_attach()", "x_generator": { "engine": "bippy-1.2.0" } } } }