In the Linux kernel, the following vulnerability has been resolved:
batman-adv: tt: avoid request storms during pending request
batadv_send_tt_request() allocates a tt_req_node when none exists for the
destination originator node. This should prevent that a multiple TT
requests are send at the same time to an originator. But if allocation of the send buffer failed, this request must be cleaned
up again.
But indicator for such a failure is "ret == false". But the actual implementation is checking for "ret == true". The check must be inverted to not loose the information about the TT request directly after it was attempted to be sent out.
This should avoid potential request storms.
Attack Parameters
Attack Vector
Network
Can be exploited remotely
Attack Complexity
Low
Easy to exploit
Privileges Required
None
No privileges needed
User Interaction
None
No user interaction needed
Impact Assessment
Confidentiality
None
No data leak
Integrity
None
No data modification
Availability
High
Complete denial of service
CVSS Vector v3.1
References 8
https://git.kernel.org/stable/c/067e413eec2e63c2996909ef55214b3a0eda0be7
416baaa9-dc9f-4396-8d5f-8c081fb06d67
https://git.kernel.org/stable/c/21c44a6895f41df811d1c91d10eea194dda2b345
416baaa9-dc9f-4396-8d5f-8c081fb06d67
https://git.kernel.org/stable/c/27c7d40008231ae4140d35501b60087a9de2d2c3
416baaa9-dc9f-4396-8d5f-8c081fb06d67
https://git.kernel.org/stable/c/5e46c76d9a5062212c4c5f642a5549fd9c057f8a
416baaa9-dc9f-4396-8d5f-8c081fb06d67
https://git.kernel.org/stable/c/6055695ea40c64a47e00742c12c99b1a33b4daed
416baaa9-dc9f-4396-8d5f-8c081fb06d67
https://git.kernel.org/stable/c/6a65ac8a81e903bb4b555c1d13532f5cb0167a4a
416baaa9-dc9f-4396-8d5f-8c081fb06d67
https://git.kernel.org/stable/c/716f434eb35869e130424331584a91fbb729b9bd
416baaa9-dc9f-4396-8d5f-8c081fb06d67
https://git.kernel.org/stable/c/aba1cf21954e64c36afb966b754adad2b0b8aa48
416baaa9-dc9f-4396-8d5f-8c081fb06d67