CVE-2021-47295

Summary

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

net: sched: fix memory leak in tcindex_partial_destroy_work

Syzbot reported memory leak in tcindex_set_parms(). The problem was in non-freed perfect hash in tcindex_partial_destroy_work().

In tcindex_set_parms() new tcindex_data is allocated and some fields from old one are copied to new one, but not the perfect hash. Since tcindex_partial_destroy_work() is the destroy function for old tcindex_data, we need to free perfect hash to avoid memory leak.

Affected Software

VendorProductVersion RangeStatus
LinuxLinux331b72922c5f58d48fd5500acadc91777cc31970 < 53af9c793f644d5841d84d8e0ad83bd7ab47f3e0affected
LinuxLinux331b72922c5f58d48fd5500acadc91777cc31970 < 01d0d2b8b4e3cf2110baba9371c0c3d04ad5c77baffected
LinuxLinux331b72922c5f58d48fd5500acadc91777cc31970 < 8d7924ce85bae64e7a67c366c7c50840f49f3a62affected
LinuxLinux331b72922c5f58d48fd5500acadc91777cc31970 < 7a6fb69bbcb21e9ce13bdf18c008c268874f0480affected
LinuxLinux331b72922c5f58d48fd5500acadc91777cc31970 < 8e9662fde6d63c78eb1350f6167f64c9d71a865baffected
LinuxLinux331b72922c5f58d48fd5500acadc91777cc31970 < 18c3fa7a7fdbb4d21dafc8a7710ae2c1680930f6affected
LinuxLinux331b72922c5f58d48fd5500acadc91777cc31970 < cac71d27745f92ee13f0ecc668ffe151a4a9c9b1affected
LinuxLinux331b72922c5f58d48fd5500acadc91777cc31970 < f5051bcece50140abd1a11a2d36dc3ec5484fc32affected
LinuxLinux331b72922c5f58d48fd5500acadc91777cc31970 < 7c183dc0af472dec33d2c0786a5e356baa8cad19affected
LinuxLinux331b72922c5f58d48fd5500acadc91777cc31970 < 3abebc503a5148072052c229c6b04b329a420ecdaffected
LinuxLinux331b72922c5f58d48fd5500acadc91777cc31970 < 372ae77cf11d11fb118cbe2d37def9dd5f826abdaffected
LinuxLinux3.18affected
LinuxLinux0 < 3.18unaffected
LinuxLinux4.14.308 <= 4.14.*unaffected
LinuxLinux4.19.276 <= 4.19.*unaffected
LinuxLinux5.4.136 <= 5.4.*unaffected
LinuxLinux5.4.235 <= 5.4.*unaffected
LinuxLinux5.10.54 <= 5.10.*unaffected
LinuxLinux5.10.173 <= 5.10.*unaffected
LinuxLinux5.13.6 <= 5.13.*unaffected
LinuxLinux5.15.100 <= 5.15.*unaffected
LinuxLinux6.1.18 <= 6.1.*unaffected
LinuxLinux6.2.5 <= 6.2.*unaffected
LinuxLinux5.14 <= *unaffected

Weaknesses

ADP Enrichment

CISA ADP Vulnrichment

  • SSVC:
  • Exploitation: none
    • Automatable: yes
    • Technical Impact: partial

CVE Program Container

Additional References

References