GHSA-H9H9-2RMF-RVHP Junrar: RarVM VM_JMP maxOpCount bypass causes infinite CPU loop during RAR4 extraction

Summary Junrar's RAR virtual machine can be forced into a deterministic infinite loop while extracting a crafted RAR4 archive. The RarVM.ExecuteCode loop is intended to be bounded by maxOpCount, but jump instructions can bypass this limit when setIP is called with a target instruction pointer...

Junrar: RarVM VM_JMP maxOpCount bypass causes infinite CPU loop during RAR4 extraction

Summary Junrar's RAR virtual machine can be forced into a deterministic infinite loop while extracting a crafted RAR4 archive. The RarVM.ExecuteCode loop is intended to be bounded by maxOpCount, but jump instructions can bypass this limit when setIP is called with a target instruction pointer...

Infinite loop

Overview com.github.junrar:junrar is a rar decompression library in plain java. Affected versions of this package are vulnerable to Infinite loop through the RarVM.ExecuteCode process. An attacker can cause the extraction thread to enter an infinite loop and exhaust CPU resources by providing a...

CVE-2026-97370 Junrar: RarVM VM_JMP maxOpCount bypass causes infinite CPU loop during RAR4 extraction

Junrar is an open source Java RAR archive library. Prior to 7.6.1, RarVM.ExecuteCode in src/main/java/com/github/junrar/unpack/vm/RarVM.java can repeatedly execute a VMJMP instruction whose target is greater than or equal to the prepared program's codeSize. The setIP function returns success...

CVE-2026-97370

The Junrar open-source Java RAR archive library is vulnerable to a CPU exhaustion flaw in versions prior to 7.6.1 . The root cause is located in RarVM.ExecuteCode within src/main/java/com/github/junrar/unpack/vm/RarVM.java, where a VM_JMP instruction can repeatedly execute if its target is greate...

EUVD-2026-102251

Junrar is an open source Java RAR archive library. Prior to 7.6.1, RarVM.ExecuteCode in src/main/java/com/github/junrar/unpack/vm/RarVM.java can repeatedly execute a VMJMP instruction whose target is greater than or equal to the prepared program's codeSize. The setIP function returns success...

CVE-2026-97370

Junrar is an open source Java RAR archive library. Prior to 7.6.1, RarVM.ExecuteCode in src/main/java/com/github/junrar/unpack/vm/RarVM.java can repeatedly execute a VMJMP instruction whose target is greater than or equal to the prepared program's codeSize. The setIP function returns success...

CVE-2026-97370 Junrar: RarVM VM_JMP maxOpCount bypass causes infinite CPU loop during RAR4 extraction

Junrar is an open source Java RAR archive library. Prior to 7.6.1, RarVM.ExecuteCode in src/main/java/com/github/junrar/unpack/vm/RarVM.java can repeatedly execute a VMJMP instruction whose target is greater than or equal to the prepared program's codeSize. The setIP function returns success...

CVE-2026-97370 Junrar: RarVM VM_JMP maxOpCount bypass causes infinite CPU loop during RAR4 extraction

Junrar is an open source Java RAR archive library. Prior to 7.6.1, RarVM.ExecuteCode in src/main/java/com/github/junrar/unpack/vm/RarVM.java can repeatedly execute a VMJMP instruction whose target is greater than or equal to the prepared program's codeSize. The setIP function returns success...

PT-2026-115111

Name of the Vulnerable Software and Affected Versions Junrar versions prior to 7.6.1 Description An issue exists in the RAR virtual machine where a crafted RAR4 archive can force the extraction thread into a deterministic infinite CPU loop. This occurs because the RarVM.ExecuteCode function in...

CVE-2026-97370: Loop with Unreachable Exit Condition

Junrar is an open source Java RAR archive library. Prior to 7.6.1, RarVM.ExecuteCode in src/main/java/com/github/junrar/unpack/vm/RarVM.java can repeatedly execute a VMJMP instruction whose target is greater than or equal to the prepared program's codeSize. The setIP function returns success...

Denial-Of-Service (DoS)

Junrar is vulnerable to denial of service DoS. The vulnerability is due to improper handling of invalid VMJMP instruction targets, which allows an attacker to craft a malicious RAR4 archive that causes infinite CPU consumption and exhausts archive-processing worker capacity during extraction...

CLSA-2026-1787908647 Fix of 8 CVEs

SECURITY UPDATE: ACLs applied to a symbolic link modified the link target instead - debian/patches/CVE-2021-23177.patch: ACLs applied to a symbolic link modified the link target instead - CVE-2021-23177 SECURITY UPDATE: symbolic links followed when changing modes, times, ACLs and flags while...