
Patch-diffing CVE-2024-23265 in the AppleDiskImages2 KEXT, the entire iOS kernel fix is one added equality check: https://8ksec.io/patch-diffing-ios-kernel/ The methodology covers every function in the KEXT. ipsw pulls kernelcaches from iOS 17.3.1 and 17.4, ipsw's symbolicator names the functions, a Ghidra script dumps every decompiled function, and Meld diffs the pair. One function comes back changed. Before: it returned -1 as if it were a valid pointer. After: one added clause if (lVar4 != 0 && lVar4 != -1). Reachable from userland via IOUserClient::externalMethod. Follow @8kSec for more such iOS kernel research.
Post summary
The text discloses a minimal kernel patch for CVE-2024‑23265 in AppleDiskImages2 KEXT, detailing how a simple equality check mitigates the flaw, and indicates the code change is reachable from userland.

