CVE-2024-38574

Summary

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

libbpf: Prevent null-pointer dereference when prog to load has no BTF

In bpf_objec_load_prog(), there's no guarantee that obj->btf is non-NULL when passing it to btf__fd(), and this function does not perform any check before dereferencing its argument (as bpf_object__btf_fd() used to do). As a consequence, we get segmentation fault errors in bpftool (for example) when trying to load programs that come without BTF information.

v2: Keep btf__fd() in the fix instead of reverting to bpf_object__btf_fd().

Affected Software

VendorProductVersion RangeStatus
LinuxLinuxdf7c3f7d3a3ddab31ca8cfa9b86a8729ec43fd2e < ef80b59acfa4dee4b5eaccb15572b69248831104affected
LinuxLinuxdf7c3f7d3a3ddab31ca8cfa9b86a8729ec43fd2e < 1fd91360a75833b7110af9834ae26c977e1273e0affected
LinuxLinuxdf7c3f7d3a3ddab31ca8cfa9b86a8729ec43fd2e < 9bf48fa19a4b1d186e08b20bf7e5de26a15644fbaffected
LinuxLinux6.8affected
LinuxLinux0 < 6.8unaffected
LinuxLinux6.8.12 <= 6.8.*unaffected
LinuxLinux6.9.3 <= 6.9.*unaffected
LinuxLinux6.10 <= *unaffected

Weaknesses

ADP Enrichment

CVE Program Container

Additional References

CISA ADP Vulnrichment

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

References