{ "dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": { "cveId": "CVE-2025-68366", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2025-12-16T14:48:05.308Z", "datePublished": "2025-12-24T10:32:53.399Z", "dateUpdated": "2026-06-16T19:12:35.384Z" }, "containers": { "cna": { "providerMetadata": { "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-05-11T21:51:48.993Z" }, "descriptions": [ { "lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nnbd: defer config unlock in nbd_genl_connect\n\nThere is one use-after-free warning when running NBD_CMD_CONNECT and\nNBD_CLEAR_SOCK:\n\nnbd_genl_connect\n nbd_alloc_and_init_config // config_refs=1\n nbd_start_device // config_refs=2\n set NBD_RT_HAS_CONFIG_REF\t\t\topen nbd // config_refs=3\n recv_work done // config_refs=2\n\t\t\t\t\t\tNBD_CLEAR_SOCK // config_refs=1\n\t\t\t\t\t\tclose nbd // config_refs=0\n refcount_inc -> uaf\n\n------------[ cut here ]------------\nrefcount_t: addition on 0; use-after-free.\nWARNING: CPU: 24 PID: 1014 at lib/refcount.c:25 refcount_warn_saturate+0x12e/0x290\n nbd_genl_connect+0x16d0/0x1ab0\n genl_family_rcv_msg_doit+0x1f3/0x310\n genl_rcv_msg+0x44a/0x790\n\nThe issue can be easily reproduced by adding a small delay before\nrefcount_inc(&nbd->config_refs) in nbd_genl_connect():\n\n mutex_unlock(&nbd->config_lock);\n if (!ret) {\n set_bit(NBD_RT_HAS_CONFIG_REF, &config->runtime_flags);\n+ printk(\"before sleep\\n\");\n+ mdelay(5 * 1000);\n+ printk(\"after sleep\\n\");\n refcount_inc(&nbd->config_refs);\n nbd_connect_reply(info, nbd->index);\n }" } ], "affected": [ { "product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": [ "drivers/block/nbd.c" ], "versions": [ { "version": "e46c7287b1c27683a8e30ca825fb98e2b97f1099", "lessThan": "330d688a5ca53857828081a3cf31b92ad1b0b3ed", "status": "affected", "versionType": "git" }, { "version": "e46c7287b1c27683a8e30ca825fb98e2b97f1099", "lessThan": "cd93db1b1b4460e6ee77564024ea461e5940f69c", "status": "affected", "versionType": "git" }, { "version": "e46c7287b1c27683a8e30ca825fb98e2b97f1099", "lessThan": "ae3e7bc1f4b393ae20e5c85583eb2c6977374716", "status": "affected", "versionType": "git" }, { "version": "e46c7287b1c27683a8e30ca825fb98e2b97f1099", "lessThan": "2e5e0665a594f076ef2b9439447bae8be293d09d", "status": "affected", "versionType": "git" }, { "version": "e46c7287b1c27683a8e30ca825fb98e2b97f1099", "lessThan": "c9b99c948b4fb014812afe7b5ccf2db121d22e46", "status": "affected", "versionType": "git" }, { "version": "e46c7287b1c27683a8e30ca825fb98e2b97f1099", "lessThan": "9a38306643874566d20f7aba7dff9e6f657b51a9", "status": "affected", "versionType": "git" }, { "version": "e46c7287b1c27683a8e30ca825fb98e2b97f1099", "lessThan": "c9e805f6a35d1dd189a9345595a5c20e87611942", "status": "affected", "versionType": "git" }, { "version": "e46c7287b1c27683a8e30ca825fb98e2b97f1099", "lessThan": "1649714b930f9ea6233ce0810ba885999da3b5d4", "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/block/nbd.c" ], "versions": [ { "version": "4.12", "status": "affected" }, { "version": "0", "lessThan": "4.12", "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": "6.12.63", "lessThanOrEqual": "6.12.*", "status": "unaffected", "versionType": "semver" }, { "version": "6.17.13", "lessThanOrEqual": "6.17.*", "status": "unaffected", "versionType": "semver" }, { "version": "6.18.2", "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": "4.12", "versionEndExcluding": "5.10.248" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.12", "versionEndExcluding": "5.15.198" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.12", "versionEndExcluding": "6.1.160" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.12", "versionEndExcluding": "6.6.120" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.12", "versionEndExcluding": "6.12.63" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.12", "versionEndExcluding": "6.17.13" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.12", "versionEndExcluding": "6.18.2" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.12", "versionEndExcluding": "6.19" } ] } ] } ], "references": [ { "url": "https://git.kernel.org/stable/c/330d688a5ca53857828081a3cf31b92ad1b0b3ed" }, { "url": "https://git.kernel.org/stable/c/cd93db1b1b4460e6ee77564024ea461e5940f69c" }, { "url": "https://git.kernel.org/stable/c/ae3e7bc1f4b393ae20e5c85583eb2c6977374716" }, { "url": "https://git.kernel.org/stable/c/2e5e0665a594f076ef2b9439447bae8be293d09d" }, { "url": "https://git.kernel.org/stable/c/c9b99c948b4fb014812afe7b5ccf2db121d22e46" }, { "url": "https://git.kernel.org/stable/c/9a38306643874566d20f7aba7dff9e6f657b51a9" }, { "url": "https://git.kernel.org/stable/c/c9e805f6a35d1dd189a9345595a5c20e87611942" }, { "url": "https://git.kernel.org/stable/c/1649714b930f9ea6233ce0810ba885999da3b5d4" } ], "title": "nbd: defer config unlock in nbd_genl_connect", "x_generator": { "engine": "bippy-1.2.0" } }, "adp": [ { "metrics": [ { "other": { "type": "ssvc", "content": { "timestamp": "2026-06-16T19:12:23.169488Z", "id": "CVE-2025-68366", "options": [ { "Exploitation": "none" }, { "Automatable": "no" }, { "Technical Impact": "partial" } ], "role": "CISA Coordinator", "version": "2.0.3" } } } ], "title": "CISA ADP Vulnrichment", "providerMetadata": { "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "shortName": "CISA-ADP", "dateUpdated": "2026-06-16T19:12:35.384Z" } } ] } }