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CVE PROGRAM SOURCE RECORD7.8 High

CVE-2022-49085

drbd: Fix five use after free bugs in get_initial_state

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Status
Published
Published
Updated
Assigning organization
Linux

Description

In the Linux kernel, the following vulnerability has been resolved: drbd: Fix five use after free bugs in get_initial_state In get_initial_state, it calls notify_initial_state_done(skb,..) if cb->args[5]==1. If genlmsg_put() failed in notify_initial_state_done(), the skb will be freed by nlmsg_free(skb). Then get_initial_state will goto out and the freed skb will be used by return value skb->len, which is a uaf bug. What's worse, the same problem goes even further: skb can also be freed in the notify_*_state_change -> notify_*_state calls below. Thus 4 additional uaf bugs happened. My patch lets the problem callee functions: notify_initial_state_done and notify_*_state_change return an error code if errors happen. So that the error codes could be propagated and the uaf bugs can be avoid. v2 reports a compilation warning. This v3 fixed this warning and built successfully in my local environment with no additional warnings. v2: https://lore.kernel.org/patchwork/patch/1435218/

Affected products

Version statuses are supplied by the assigning organization. Consult the original record for detailed ranges and platform conditions.

Linux Linux

Default version status: unaffected

  • a29728463b254ce81ecefdf20c1a02e01d9361da to < 0489700bfeb1e53eb2039c2291c67e71b0b40103affected
  • a29728463b254ce81ecefdf20c1a02e01d9361da to < dcf6be17b5c53b741898d2223b23e66d682de300affected
  • a29728463b254ce81ecefdf20c1a02e01d9361da to < 188fe6b26765edbad4055611c0f788b6870f4024affected
  • a29728463b254ce81ecefdf20c1a02e01d9361da to < b6a4055036eed1f5e239ce3d8b0db1ce38bba447affected
  • a29728463b254ce81ecefdf20c1a02e01d9361da to < 594205b4936771a250f9d141e7e0fff21c3dd2d9affected
  • a29728463b254ce81ecefdf20c1a02e01d9361da to < a972c768723359ec995579902473028fe3cd64b1affected
  • a29728463b254ce81ecefdf20c1a02e01d9361da to < de63e74da2333b4068bb79983e632db730fea97eaffected
  • a29728463b254ce81ecefdf20c1a02e01d9361da to < 226e993c39405292781bfcf4b039a8db56aab362affected
  • a29728463b254ce81ecefdf20c1a02e01d9361da to < aadb22ba2f656581b2f733deb3a467c48cc618f6affected

Linux Linux

Default version status: affected

  • 4.5affected
  • 0 to < 4.5unaffected
  • 4.9.311 to ≤ 4.9.*unaffected
  • 4.14.276 to ≤ 4.14.*unaffected
  • 4.19.238 to ≤ 4.19.*unaffected
  • 5.4.189 to ≤ 5.4.*unaffected
  • 5.10.111 to ≤ 5.10.*unaffected
  • 5.15.34 to ≤ 5.15.*unaffected
  • 5.16.20 to ≤ 5.16.*unaffected
  • 5.17.3 to ≤ 5.17.*unaffected
  • 5.18 to ≤ *unaffected

References