| { |
| "containers": { |
| "cna": { |
| "providerMetadata": { |
| "orgId": "f4215fc3-5b6b-47ff-a258-f7189bd81038" |
| }, |
| "descriptions": [ |
| { |
| "lang": "en", |
| "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nxenbus: Use kref to track req lifetime\n\nMarek reported seeing a NULL pointer fault in the xenbus_thread\ncallstack:\nBUG: kernel NULL pointer dereference, address: 0000000000000000\nRIP: e030:__wake_up_common+0x4c/0x180\nCall Trace:\n <TASK>\n __wake_up_common_lock+0x82/0xd0\n process_msg+0x18e/0x2f0\n xenbus_thread+0x165/0x1c0\n\nprocess_msg+0x18e is req->cb(req). req->cb is set to xs_wake_up(), a\nthin wrapper around wake_up(), or xenbus_dev_queue_reply(). It seems\nlike it was xs_wake_up() in this case.\n\nIt seems like req may have woken up the xs_wait_for_reply(), which\nkfree()ed the req. When xenbus_thread resumes, it faults on the zero-ed\ndata.\n\nLinux Device Drivers 2nd edition states:\n\"Normally, a wake_up call can cause an immediate reschedule to happen,\nmeaning that other processes might run before wake_up returns.\"\n... which would match the behaviour observed.\n\nChange to keeping two krefs on each request. One for the caller, and\none for xenbus_thread. Each will kref_put() when finished, and the last\nwill free it.\n\nThis use of kref matches the description in\nDocumentation/core-api/kref.rst" |
| } |
| ], |
| "affected": [ |
| { |
| "product": "Linux", |
| "vendor": "Linux", |
| "defaultStatus": "unaffected", |
| "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", |
| "programFiles": [ |
| "drivers/xen/xenbus/xenbus.h", |
| "drivers/xen/xenbus/xenbus_comms.c", |
| "drivers/xen/xenbus/xenbus_dev_frontend.c", |
| "drivers/xen/xenbus/xenbus_xs.c" |
| ], |
| "versions": [ |
| { |
| "version": "fd8aa9095a95c02dcc35540a263267c29b8fda9d", |
| "lessThan": "0e94a246bb6d9538010b6c02d2b1d4717a97b2e5", |
| "status": "affected", |
| "versionType": "git" |
| }, |
| { |
| "version": "fd8aa9095a95c02dcc35540a263267c29b8fda9d", |
| "lessThan": "f1bcac367bc95631afbb918348f30dec887d0e1b", |
| "status": "affected", |
| "versionType": "git" |
| }, |
| { |
| "version": "fd8aa9095a95c02dcc35540a263267c29b8fda9d", |
| "lessThan": "4d260a5558df4650eb87bc41b2c9ac2d6b2ba447", |
| "status": "affected", |
| "versionType": "git" |
| }, |
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| "version": "fd8aa9095a95c02dcc35540a263267c29b8fda9d", |
| "lessThan": "8b02f85e84dc6f7c150cef40ddb69af5a25659e5", |
| "status": "affected", |
| "versionType": "git" |
| }, |
| { |
| "version": "fd8aa9095a95c02dcc35540a263267c29b8fda9d", |
| "lessThan": "cbfaf46b88a4c01b64c4186cdccd766c19ae644c", |
| "status": "affected", |
| "versionType": "git" |
| }, |
| { |
| "version": "fd8aa9095a95c02dcc35540a263267c29b8fda9d", |
| "lessThan": "8e9c8a0393b5f85f1820c565ab8105660f4e8f92", |
| "status": "affected", |
| "versionType": "git" |
| }, |
| { |
| "version": "fd8aa9095a95c02dcc35540a263267c29b8fda9d", |
| "lessThan": "2466b0f66795c3c426cacc8998499f38031dbb59", |
| "status": "affected", |
| "versionType": "git" |
| }, |
| { |
| "version": "fd8aa9095a95c02dcc35540a263267c29b8fda9d", |
| "lessThan": "1f0304dfd9d217c2f8b04a9ef4b3258a66eedd27", |
| "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/xen/xenbus/xenbus.h", |
| "drivers/xen/xenbus/xenbus_comms.c", |
| "drivers/xen/xenbus/xenbus_dev_frontend.c", |
| "drivers/xen/xenbus/xenbus_xs.c" |
| ], |
| "versions": [ |
| { |
| "version": "4.11", |
| "status": "affected" |
| }, |
| { |
| "version": "0", |
| "lessThan": "4.11", |
| "status": "unaffected", |
| "versionType": "semver" |
| }, |
| { |
| "version": "5.4.294", |
| "lessThanOrEqual": "5.4.*", |
| "status": "unaffected", |
| "versionType": "semver" |
| }, |
| { |
| "version": "5.10.238", |
| "lessThanOrEqual": "5.10.*", |
| "status": "unaffected", |
| "versionType": "semver" |
| }, |
| { |
| "version": "5.15.183", |
| "lessThanOrEqual": "5.15.*", |
| "status": "unaffected", |
| "versionType": "semver" |
| }, |
| { |
| "version": "6.1.139", |
| "lessThanOrEqual": "6.1.*", |
| "status": "unaffected", |
| "versionType": "semver" |
| }, |
| { |
| "version": "6.6.91", |
| "lessThanOrEqual": "6.6.*", |
| "status": "unaffected", |
| "versionType": "semver" |
| }, |
| { |
| "version": "6.12.29", |
| "lessThanOrEqual": "6.12.*", |
| "status": "unaffected", |
| "versionType": "semver" |
| }, |
| { |
| "version": "6.14.7", |
| "lessThanOrEqual": "6.14.*", |
| "status": "unaffected", |
| "versionType": "semver" |
| }, |
| { |
| "version": "6.15", |
| "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": "4.11", |
| "versionEndExcluding": "5.4.294" |
| }, |
| { |
| "vulnerable": true, |
| "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", |
| "versionStartIncluding": "4.11", |
| "versionEndExcluding": "5.10.238" |
| }, |
| { |
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| }, |
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| "versionStartIncluding": "4.11", |
| "versionEndExcluding": "6.1.139" |
| }, |
| { |
| "vulnerable": true, |
| "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", |
| "versionStartIncluding": "4.11", |
| "versionEndExcluding": "6.6.91" |
| }, |
| { |
| "vulnerable": true, |
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| "versionStartIncluding": "4.11", |
| "versionEndExcluding": "6.12.29" |
| }, |
| { |
| "vulnerable": true, |
| "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", |
| "versionStartIncluding": "4.11", |
| "versionEndExcluding": "6.14.7" |
| }, |
| { |
| "vulnerable": true, |
| "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", |
| "versionStartIncluding": "4.11", |
| "versionEndExcluding": "6.15" |
| } |
| ] |
| } |
| ] |
| } |
| ], |
| "references": [ |
| { |
| "url": "https://git.kernel.org/stable/c/0e94a246bb6d9538010b6c02d2b1d4717a97b2e5" |
| }, |
| { |
| "url": "https://git.kernel.org/stable/c/f1bcac367bc95631afbb918348f30dec887d0e1b" |
| }, |
| { |
| "url": "https://git.kernel.org/stable/c/4d260a5558df4650eb87bc41b2c9ac2d6b2ba447" |
| }, |
| { |
| "url": "https://git.kernel.org/stable/c/8b02f85e84dc6f7c150cef40ddb69af5a25659e5" |
| }, |
| { |
| "url": "https://git.kernel.org/stable/c/cbfaf46b88a4c01b64c4186cdccd766c19ae644c" |
| }, |
| { |
| "url": "https://git.kernel.org/stable/c/8e9c8a0393b5f85f1820c565ab8105660f4e8f92" |
| }, |
| { |
| "url": "https://git.kernel.org/stable/c/2466b0f66795c3c426cacc8998499f38031dbb59" |
| }, |
| { |
| "url": "https://git.kernel.org/stable/c/1f0304dfd9d217c2f8b04a9ef4b3258a66eedd27" |
| } |
| ], |
| "title": "xenbus: Use kref to track req lifetime", |
| "x_generator": { |
| "engine": "bippy-1.2.0" |
| } |
| } |
| }, |
| "cveMetadata": { |
| "assignerOrgId": "f4215fc3-5b6b-47ff-a258-f7189bd81038", |
| "cveID": "CVE-2025-37949", |
| "requesterUserId": "gregkh@kernel.org", |
| "serial": "1", |
| "state": "PUBLISHED" |
| }, |
| "dataType": "CVE_RECORD", |
| "dataVersion": "5.0" |
| } |
