CVE-2023-52462

Summary

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

bpf: fix check for attempt to corrupt spilled pointer

When register is spilled onto a stack as a 1/2/4-byte register, we set slot_type[BPF_REG_SIZE - 1] (plus potentially few more below it, depending on actual spill size). So to check if some stack slot has spilled register we need to consult slot_type[7], not slot_type[0].

To avoid the need to remember and double-check this in the future, just use is_spilled_reg() helper.

Affected Software

VendorProductVersion RangeStatus
LinuxLinuxcdd73a5ed0840da88a3b9ad353f568e6f156d417 < 2757f17972d87773b3677777f5682510f13c66efaffected
LinuxLinux07c286c10a9cedbd71f20269ff3a4e73d9aab2fe < 67e6707f07354ed1acb4e65552e97c60cf9d69cfaffected
LinuxLinux27113c59b6d0a587b29ae72d4ff3f832f58b0651 < fc3e3c50a0a4cac1463967c110686189e4a59104affected
LinuxLinux27113c59b6d0a587b29ae72d4ff3f832f58b0651 < 8dc15b0670594543c356567a1a45b0182ec63174affected
LinuxLinux27113c59b6d0a587b29ae72d4ff3f832f58b0651 < 40617d45ea05535105e202a8a819e388a2b1f036affected
LinuxLinux27113c59b6d0a587b29ae72d4ff3f832f58b0651 < ab125ed3ec1c10ccc36bc98c7a4256ad114a3daeaffected
LinuxLinux5.10.163 < 5.10.209affected
LinuxLinux5.15.86 < 5.15.148affected
LinuxLinux5.16affected
LinuxLinux0 < 5.16unaffected
LinuxLinux5.10.209 <= 5.10.*unaffected
LinuxLinux5.15.148 <= 5.15.*unaffected
LinuxLinux6.1.75 <= 6.1.*unaffected
LinuxLinux6.6.14 <= 6.6.*unaffected
LinuxLinux6.7.2 <= 6.7.*unaffected
LinuxLinux6.8 <= *unaffected

Weaknesses

ADP Enrichment

CISA ADP Vulnrichment

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

CVE Program Container

Additional References

References