VULN/vuln-cve
1
0 Fork 0
Code Pull Requests Actions Activity
Files
c1444140e59c61ba154436ea0cd6284d8a97c3f0
vuln-cve/data/2022/49xxx/CVE-2022-49767.json
T

248 lines
13 KiB
JSON
Raw Blame History

{
"dataType": "CVE_RECORD",
"dataVersion": "5.2",
"cveMetadata": {
"cveId": "CVE-2022-49767",
"assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"state": "PUBLISHED",
"assignerShortName": "Linux",
"dateReserved": "2025-04-16T07:17:33.804Z",
"datePublished": "2025-05-01T14:09:06.183Z",
"dateUpdated": "2026-05-11T19:06:23.271Z"
},
"containers": {
"cna": {
"providerMetadata": {
"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"shortName": "Linux",
"dateUpdated": "2026-05-11T19:06:23.271Z"
},
"descriptions": [
{
"lang": "en",
"value": "In the Linux kernel, the following vulnerability has been resolved:\n\n9p/trans_fd: always use O_NONBLOCK read/write\n\nsyzbot is reporting hung task at p9_fd_close() [1], for p9_mux_poll_stop()\n from p9_conn_destroy() from p9_fd_close() is failing to interrupt already\nstarted kernel_read() from p9_fd_read() from p9_read_work() and/or\nkernel_write() from p9_fd_write() from p9_write_work() requests.\n\nSince p9_socket_open() sets O_NONBLOCK flag, p9_mux_poll_stop() does not\nneed to interrupt kernel_read()/kernel_write(). However, since p9_fd_open()\ndoes not set O_NONBLOCK flag, but pipe blocks unless signal is pending,\np9_mux_poll_stop() needs to interrupt kernel_read()/kernel_write() when\nthe file descriptor refers to a pipe. In other words, pipe file descriptor\nneeds to be handled as if socket file descriptor.\n\nWe somehow need to interrupt kernel_read()/kernel_write() on pipes.\n\nA minimal change, which this patch is doing, is to set O_NONBLOCK flag\n from p9_fd_open(), for O_NONBLOCK flag does not affect reading/writing\nof regular files. But this approach changes O_NONBLOCK flag on userspace-\nsupplied file descriptors (which might break userspace programs), and\nO_NONBLOCK flag could be changed by userspace. It would be possible to set\nO_NONBLOCK flag every time p9_fd_read()/p9_fd_write() is invoked, but still\nremains small race window for clearing O_NONBLOCK flag.\n\nIf we don't want to manipulate O_NONBLOCK flag, we might be able to\nsurround kernel_read()/kernel_write() with set_thread_flag(TIF_SIGPENDING)\nand recalc_sigpending(). Since p9_read_work()/p9_write_work() works are\nprocessed by kernel threads which process global system_wq workqueue,\nsignals could not be delivered from remote threads when p9_mux_poll_stop()\n from p9_conn_destroy() from p9_fd_close() is called. Therefore, calling\nset_thread_flag(TIF_SIGPENDING)/recalc_sigpending() every time would be\nneeded if we count on signals for making kernel_read()/kernel_write()\nnon-blocking.\n\n[Dominique: add comment at Christian's suggestion]"
}
],
"affected": [
{
"product": "Linux",
"vendor": "Linux",
"defaultStatus": "unaffected",
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"programFiles": [
"net/9p/trans_fd.c"
],
"versions": [
{
"version": "27979bb2ff748613dba96ae66392a76fb0678527",
"lessThan": "0b5e6bd72b8171364616841603a70e4ba9837063",
"status": "affected",
"versionType": "git"
},
{
"version": "27979bb2ff748613dba96ae66392a76fb0678527",
"lessThan": "9f8554615df668e4bf83294633ee9d232b28ce45",
"status": "affected",
"versionType": "git"
},
{
"version": "27979bb2ff748613dba96ae66392a76fb0678527",
"lessThan": "7abf40f06a76c0dff42eada10597917e9776fbd4",
"status": "affected",
"versionType": "git"
},
{
"version": "27979bb2ff748613dba96ae66392a76fb0678527",
"lessThan": "b1ad04da7fe4515e2ce2d5f2dcab3b5b6d45614b",
"status": "affected",
"versionType": "git"
},
{
"version": "27979bb2ff748613dba96ae66392a76fb0678527",
"lessThan": "a8e2fc8f7b41fa9d9ca5f624f4e4d34fce5b40a9",
"status": "affected",
"versionType": "git"
},
{
"version": "27979bb2ff748613dba96ae66392a76fb0678527",
"lessThan": "0e07032b4b4724b8ad1003698cb81083c1818999",
"status": "affected",
"versionType": "git"
},
{
"version": "27979bb2ff748613dba96ae66392a76fb0678527",
"lessThan": "5af16182c5639349415118e9e9aecd8355f7a08b",
"status": "affected",
"versionType": "git"
},
{
"version": "27979bb2ff748613dba96ae66392a76fb0678527",
"lessThan": "ef575281b21e9a34dfae544a187c6aac2ae424a9",
"status": "affected",
"versionType": "git"
}
]
},
{
"product": "Linux",
"vendor": "Linux",
"defaultStatus": "affected",
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"programFiles": [
"net/9p/trans_fd.c"
],
"versions": [
{
"version": "2.6.17",
"status": "affected"
},
{
"version": "0",
"lessThan": "2.6.17",
"status": "unaffected",
"versionType": "semver"
},
{
"version": "4.9.334",
"lessThanOrEqual": "4.9.*",
"status": "unaffected",
"versionType": "semver"
},
{
"version": "4.14.300",
"lessThanOrEqual": "4.14.*",
"status": "unaffected",
"versionType": "semver"
},
{
"version": "4.19.267",
"lessThanOrEqual": "4.19.*",
"status": "unaffected",
"versionType": "semver"
},
{
"version": "5.4.225",
"lessThanOrEqual": "5.4.*",
"status": "unaffected",
"versionType": "semver"
},
{
"version": "5.10.156",
"lessThanOrEqual": "5.10.*",
"status": "unaffected",
"versionType": "semver"
},
{
"version": "5.15.80",
"lessThanOrEqual": "5.15.*",
"status": "unaffected",
"versionType": "semver"
},
{
"version": "6.0.10",
"lessThanOrEqual": "6.0.*",
"status": "unaffected",
"versionType": "semver"
},
{
"version": "6.1",
"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": "2.6.17",
"versionEndExcluding": "4.9.334"
},
{
"vulnerable": true,
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"versionStartIncluding": "2.6.17",
"versionEndExcluding": "4.14.300"
},
{
"vulnerable": true,
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"versionStartIncluding": "2.6.17",
"versionEndExcluding": "4.19.267"
},
{
"vulnerable": true,
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"versionStartIncluding": "2.6.17",
"versionEndExcluding": "5.4.225"
},
{
"vulnerable": true,
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"versionStartIncluding": "2.6.17",
"versionEndExcluding": "5.10.156"
},
{
"vulnerable": true,
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"versionStartIncluding": "2.6.17",
"versionEndExcluding": "5.15.80"
},
{
"vulnerable": true,
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"versionStartIncluding": "2.6.17",
"versionEndExcluding": "6.0.10"
},
{
"vulnerable": true,
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"versionStartIncluding": "2.6.17",
"versionEndExcluding": "6.1"
}
]
}
]
}
],
"references": [
{
"url": "https://git.kernel.org/stable/c/0b5e6bd72b8171364616841603a70e4ba9837063"
},
{
"url": "https://git.kernel.org/stable/c/9f8554615df668e4bf83294633ee9d232b28ce45"
},
{
"url": "https://git.kernel.org/stable/c/7abf40f06a76c0dff42eada10597917e9776fbd4"
},
{
"url": "https://git.kernel.org/stable/c/b1ad04da7fe4515e2ce2d5f2dcab3b5b6d45614b"
},
{
"url": "https://git.kernel.org/stable/c/a8e2fc8f7b41fa9d9ca5f624f4e4d34fce5b40a9"
},
{
"url": "https://git.kernel.org/stable/c/0e07032b4b4724b8ad1003698cb81083c1818999"
},
{
"url": "https://git.kernel.org/stable/c/5af16182c5639349415118e9e9aecd8355f7a08b"
},
{
"url": "https://git.kernel.org/stable/c/ef575281b21e9a34dfae544a187c6aac2ae424a9"
}
],
"title": "9p/trans_fd: always use O_NONBLOCK read/write",
"x_generator": {
"engine": "bippy-1.2.0"
}
}
}
}
View Git Blame Copy Permalink