Adding some incidents (#276)

* adding some incidents * fixed typos * Update docs/wiki/testing/incidents.md Co-authored-by: Mário Havel <[email protected]> --------- Co-authored-by: Mário Havel <[email protected]>
eth-protocol-fellows · May 20, 2024 · 9a9d6f2 · 9a9d6f2
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-# Notable mainnet incidents 
+# Notable mainnet incidents
 
 > :warning: This article is a [stub](https://en.wikipedia.org/wiki/Wikipedia:Stub), help the wiki by [contributing](/contributing.md) and expanding it.
+> Incidents are the disruptions, vulnerabilities and attacks faced by the network which has questioned it's stability and security. Below are some incidents that affected the network and their sources.
 
-- [Post-Mortem Report: Ethereum Mainnet Finality (05/11/2023)](https://medium.com/offchainlabs/post-mortem-report-ethereum-mainnet-finality-05-11-2023-95e271dfd8b2)
-- [Minority split 2021-08-27 post mortem](https://github.com/ethereum/go-ethereum/blob/master/docs/postmortems/2021-08-22-split-postmortem.md)
+- [Post-Mortem, Blob Propagation Issues (27/03/2024)](https://gist.github.com/benhenryhunter/687299bcfe064674537dc9348d771e83) In March 2024, after Dencun upgrade, blobs attached to blocks from certain builders propagated too slowly over p2p which caused a client implementation to miss few slots. 
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+- [Post-Mortem Report: Ethereum Mainnet DOS Incident (07/02/2024)](https://blog.ethereum.org/2024/03/21/sepolia-incident) It was discovered that there was a possibility for a Denial-of-service attack dating from when the merge happened to the dencun hard fork. An attacker could create a block exceeding the specified limit of 5mb and adding multiple transactions into the block each not up to 128kb while also making sure that the transactions within the block have a collective gas which is below 30 million. With this action most nodes will reject the blocks which will lead to minority nodes acceptance creating forked blocks and missed proposer rewards.
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+- [Post-Mortem Report: Ethereum Mainnet Finality (05/11/2023)](https://medium.com/offchainlabs/post-mortem-report-ethereum-mainnet-finality-05-11-2023-95e271dfd8b2) The Mainnet had some disruptions, which led to blocks not getting produced leading to a significant delay in transactions reaching finality, this continued for two days and resulted in an inactivity consequence, the network fully recovered without intervention.
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+- [Post-Mortem Report: Minority Split (2021-08-27)](https://github.com/ethereum/go-ethereum/blob/master/docs/postmortems/2021-08-22-split-postmortem.md) This happened when Geth tried to assign data back into memory after the `datacopy` operation. Instead of saving the data in a new location, it accidentally overwrote the original data, causing it to become corrupted.