CVE-2022-48757

Summary

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

net: fix information leakage in /proc/net/ptype

In one net namespace, after creating a packet socket without binding it to a device, users in other net namespaces can observe the new packet_type added by this packet socket by reading /proc/net/ptype file. This is minor information leakage as packet socket is namespace aware.

Add a net pointer in packet_type to keep the net namespace of of corresponding packet socket. In ptype_seq_show, this net pointer must be checked when it is not NULL.

Affected Software

VendorProductVersion RangeStatus
LinuxLinux2feb27dbe00cbb4f7d31f90acf6bd0d751dd0a50 < 8f88c78d24f6f346919007cd459fd7e51a8c7779affected
LinuxLinux2feb27dbe00cbb4f7d31f90acf6bd0d751dd0a50 < be1ca30331c7923c6f376610c1bd6059be9b1908affected
LinuxLinux2feb27dbe00cbb4f7d31f90acf6bd0d751dd0a50 < c38023032a598ec6263e008d62c7f02def72d5c7affected
LinuxLinux2feb27dbe00cbb4f7d31f90acf6bd0d751dd0a50 < b67ad6170c0ea87391bb253f35d1f78857736e54affected
LinuxLinux2feb27dbe00cbb4f7d31f90acf6bd0d751dd0a50 < e372ecd455b6ebc7720f52bf4b5f5d44d02f2092affected
LinuxLinux2feb27dbe00cbb4f7d31f90acf6bd0d751dd0a50 < db044d97460ea792110eb8b971e82569ded536c6affected
LinuxLinux2feb27dbe00cbb4f7d31f90acf6bd0d751dd0a50 < e43669c77cb3a742b7d84ecdc7c68c4167a7709baffected
LinuxLinux2feb27dbe00cbb4f7d31f90acf6bd0d751dd0a50 < 839ec7039513a4f84bfbaff953a9393471176beeaffected
LinuxLinux2feb27dbe00cbb4f7d31f90acf6bd0d751dd0a50 < 47934e06b65637c88a762d9c98329ae6e3238888affected
LinuxLinux2.6.26affected
LinuxLinux0 < 2.6.26unaffected
LinuxLinux4.4.302 <= 4.4.*unaffected
LinuxLinux4.9.300 <= 4.9.*unaffected
LinuxLinux4.14.265 <= 4.14.*unaffected
LinuxLinux4.19.228 <= 4.19.*unaffected
LinuxLinux5.4.176 <= 5.4.*unaffected
LinuxLinux5.10.96 <= 5.10.*unaffected
LinuxLinux5.15.19 <= 5.15.*unaffected
LinuxLinux5.16.5 <= 5.16.*unaffected
LinuxLinux5.17 <= *unaffected

Weaknesses

ADP Enrichment

CVE Program Container

Additional References

CISA ADP Vulnrichment

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

References