CVE-2022-49875

Summary

In the Linux kernel, the following vulnerability has been resolved:

bpftool: Fix NULL pointer dereference when pin {PROG, MAP, LINK} without FILE

When using bpftool to pin {PROG, MAP, LINK} without FILE, segmentation fault will occur. The reson is that the lack of FILE will cause strlen to trigger NULL pointer dereference. The corresponding stacktrace is shown below:

do_pin do_pin_any do_pin_fd mount_bpffs_for_pin strlen(name) <- NULL pointer dereference

Fix it by adding validation to the common process.

Affected Software

VendorProductVersion RangeStatus
LinuxLinux75a1e792c335b5c6d7fdb1014da47aeb64c5944f < 8c80b2fca4112d724dde477aed13f7b0510a2792affected
LinuxLinux75a1e792c335b5c6d7fdb1014da47aeb64c5944f < 6dcdd1b68b7f9333d48d48fc77b75e7f235f6a4aaffected
LinuxLinux75a1e792c335b5c6d7fdb1014da47aeb64c5944f < da5161ba94c5e9182c301dd4f09c94f715c068bdaffected
LinuxLinux75a1e792c335b5c6d7fdb1014da47aeb64c5944f < 34de8e6e0e1f66e431abf4123934a2581cb5f133affected
LinuxLinux5.7affected
LinuxLinux0 < 5.7unaffected
LinuxLinux5.10.155 <= 5.10.*unaffected
LinuxLinux5.15.79 <= 5.15.*unaffected
LinuxLinux6.0.9 <= 6.0.*unaffected
LinuxLinux6.1 <= *unaffected

Weaknesses

ADP Enrichment

CISA ADP Vulnrichment

  • SSVC:
  • Exploitation: none
    • Automatable: no
    • Technical Impact: partial

References