CVE-2021-47297
- Source
- https://nvd.nist.gov/vuln/detail/CVE-2021-47297
- Import Source
- https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2021-47297.json
- JSON Data
- https://api.osv.dev/v1/vulns/CVE-2021-47297
- Related
- Published
- 2024-05-21T15:15:17Z
- Modified
- 2024-11-06T22:46:54.626151Z
- Summary
- [none]
- Details
-
In the Linux kernel, the following vulnerability has been resolved:
net: fix uninit-value in caifseqpktsendmsg
When nrsegs equal to zero in iovecfromuser, the object msg->msgiter.iov is uninit stack memory in caifseqpktsendmsg which is defined in _syssendmsg. So we cann't just judge msg->msgiter.iov->base directlly. We can use nrsegs to judge msg in caifseqpkt_sendmsg whether has data buffers.
===================================================== BUG: KMSAN: uninit-value in caifseqpktsendmsg+0x693/0xf60 net/caif/caifsocket.c:542 Call Trace: dumpstack lib/dumpstack.c:77 [inline] dumpstack+0x1c9/0x220 lib/dumpstack.c:118 kmsanreport+0xf7/0x1e0 mm/kmsan/kmsanreport.c:118 _msanwarning+0x58/0xa0 mm/kmsan/kmsaninstr.c:215 caifseqpktsendmsg+0x693/0xf60 net/caif/caifsocket.c:542 socksendmsgnosec net/socket.c:652 [inline] socksendmsg net/socket.c:672 [inline] syssendmsg+0x12b6/0x1350 net/socket.c:2343 _syssendmsg net/socket.c:2397 [inline] _syssendmmsg+0x808/0xc90 net/socket.c:2480 _compatsys_sendmmsg net/compat.c:656 [inline]
- References
-
- https://git.kernel.org/stable/c/1582a02fecffcee306663035a295e28e1c4aaaff
- https://git.kernel.org/stable/c/452c3ed7bf63721b07bc2238ed1261bb26027e85
- https://git.kernel.org/stable/c/5c6d8e2f7187b8e45a18c27acb7a3885f03ee3db
- https://git.kernel.org/stable/c/9413c0abb57f70a953b1116318d6aa478013c35d
- https://git.kernel.org/stable/c/991e634360f2622a683b48dfe44fe6d9cb765a09
- https://git.kernel.org/stable/c/d4c7797ab1517515f0d08b3bc1c6b48883889c54
- https://git.kernel.org/stable/c/d9d646acad2c3590e189bb5d5c86ab8bd8a2dfc3
- https://git.kernel.org/stable/c/ffe31dd70b70a40cd6b21b78c1713a23e021843a
- https://security-tracker.debian.org/tracker/CVE-2021-47297
Affected packages
Debian:11 / linux
Package
- Name
- linux
- Purl
- pkg:deb/debian/linux?arch=source
Debian:12 / linux
Package
- Name
- linux
- Purl
- pkg:deb/debian/linux?arch=source
Debian:13 / linux
Package
- Name
- linux
- Purl
- pkg:deb/debian/linux?arch=source