CVE-2021-47202
See a problem?- Source
- https://nvd.nist.gov/vuln/detail/CVE-2021-47202
- Import Source
- https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2021-47202.json
- JSON Data
- https://api.osv.dev/v1/vulns/CVE-2021-47202
- Related
- Published
- 2024-04-10T19:15:48Z
- Modified
- 2024-09-18T03:17:22.389466Z
- Summary
- [none]
- Details
-
In the Linux kernel, the following vulnerability has been resolved:
thermal: Fix NULL pointer dereferences in ofthermal functions
ofparsethermalzones() parses the thermal-zones node and registers a thermalzone device for each subnode. However, if a thermal zone is consuming a thermal sensor and that thermal sensor device hasn't probed yet, an attempt to set trippoint*_temp for that thermal zone device can cause a NULL pointer dereference. Fix it.
console:/sys/class/thermal/thermalzone87 # echo 120000 > trippoint0temp ... Unable to handle kernel NULL pointer dereference at virtual address 0000000000000020 ... Call trace: ofthermalsettriptemp+0x40/0xc4 trippointtempstore+0xc0/0x1dc devattrstore+0x38/0x88 sysfskfwrite+0x64/0xc0 kernfsfopwriteiter+0x108/0x1d0 vfswrite+0x2f4/0x368 ksyswrite+0x7c/0xec _arm64syswrite+0x20/0x30 el0svccommon.llvm.7279915941325364641+0xbc/0x1bc doel0svc+0x28/0xa0 el0svc+0x14/0x24 el0synchandler+0x88/0xec el0_sync+0x1c0/0x200
While at it, fix the possible NULL pointer dereference in other functions as well: ofthermalgettemp(), ofthermalsetemultemp(), ofthermalgettrend().
- References
-
- https://git.kernel.org/stable/c/0750f769b95841b34a9fe8c418dd792ff526bf86
- https://git.kernel.org/stable/c/6a315471cb6a07f651e1d3adc8962730f4fcccac
- https://git.kernel.org/stable/c/828f4c31684da94ecf0b44a2cbd35bbede04f0bd
- https://git.kernel.org/stable/c/96cfe05051fd8543cdedd6807ec59a0e6c409195
- https://git.kernel.org/stable/c/ef2590a5305e0b8e9342f84c2214aa478ee7f28e
- https://security-tracker.debian.org/tracker/CVE-2021-47202
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