CVE catalog
CVE-2026-110259
OW2 ASM 3.0 before 9.11 contains an uncontrolled recursion vulnerability in ClassWriter.replaceAsmInstructions() that allows attackers to cause denial of service through crafted class files. Attackers
- Severity
- Medium · CVSS 6.8
CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:P/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X - Published
- Updated
- Source
- [NVD] · [CVE record]
- EPSS
- 0.17% · Oct 25, 2026
OW2 ASM 3.0 before 9.11 contains an uncontrolled recursion vulnerability in ClassWriter.replaceAsmInstructions() that allows attackers to cause denial of service through crafted class files. Attackers can supply a class with a large method containing many long forward jumps, triggering unbounded toByteArray() recursion and a StackOverflowError during transformation.
Vulnerable and fixed packages
Distribution-reported package versions and fixes. These do not depend on matching against the OpenFactory package catalog.
| Distribution | Package | Release | Version | Status |
|---|---|---|---|---|
| Debian | asm | sid | 9.11.1-1 | fixed |
| Debian | asm | forky | 9.11.1-1 | fixed |
| Debian | asm | trixie | 9.8-1 | vulnerable |
| Debian | asm | bookworm | 9.4-1 | vulnerable |
Fixed-version evidence
| Distribution | Package | Type | Release | Fixed version | Urgency | Origin | Bugs |
|---|---|---|---|---|---|---|---|
| Debian | asm | source | sid | 9.11.1-1 | not yet assigned | Not reported | [1151198] |
| Debian | asm | source | forky | 9.11.1-1 | not yet assigned | Not reported | [1151198] |
| Debian | asm | source | trixie | (unfixed) | not yet assigned | Not reported | [1151198] |
| Debian | asm | source | bookworm | (unfixed) | not yet assigned | Not reported | [1151198] |
Notes
[trixie] asm: Minor issue
OpenFactory catalog packages
[Debian 12 (Bookworm)]
- [libasm-java]Affected
Source package: [asm]
Details (2)
9.4-1· all · bookwormAffected
nvd · asm · debian · bookworm; nvd · asm · debian · 12
9.4-1· all · bookwormAffected
nvd · asm · debian · bookworm; nvd · asm · debian · 12
[Debian 13 (Trixie)]
- [libasm-java]Affected
Source package: [asm]
Details (2)
9.8-1· all · trixieAffected
nvd · asm · debian · 13
9.8-1· all · trixieAffected
nvd · asm · debian · 13
Observed:
References
- [https://asm.ow2.io/versions.html]
- [https://gitlab.ow2.org/asm/asm/-/blob/ASM_9_10_1/asm/src/main/java/org/objectweb/asm/ClassWriter.java#L751]
- [https://gitlab.ow2.org/asm/asm/-/commit/e9aca627c17e1619bcb8059afb43382dac6b275f]
- [https://gitlab.ow2.org/asm/asm/-/merge_requests/459]
- [https://nvd.nist.gov/vuln/detail/CVE-2026-110259]
- [https://osv.dev/vulnerability/DEBIAN-CVE-2026-110259]
- [https://security-tracker.debian.org/tracker/CVE-2026-110259]
- [https://www.vulncheck.com/advisories/ow2-asm-3.0-before-9.11-uncontrolled-recursion-via-classwriter-replaceasminstructions]
[Debian Security Tracker] · [FIRST EPSS] · [National Vulnerability Database (NVD)] · [OSV Package Vulnerability Database]