Description
radare2 6.1.5 contains a use-after-free vulnerability in the gdbr_threads_list() function that allows remote attackers to trigger memory corruption by sending a valid qfThreadInfo response followed by a malformed qsThreadInfo response. Attackers can exploit this vulnerability through GDB remote debugging to cause a denial of service or potentially achieve code execution by manipulating thread list processing.
Affected products
| Vendor | Product | Affected | Fixed |
|---|---|---|---|
| radare2 | radare2 | 6.1.5 | — |
Fixed in Linux distributions
Distributions backport fixes, so the version that fixes this vulnerability differs per release — upgrade to at least the version shown. From the distributions' security trackers and advisories.
Ubuntu
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu 26.10 | radare2 | No fix yet | — |
| Ubuntu 26.04 LTS | radare2 | No fix yet | — |
| Ubuntu 25.10 | radare2 | No fix yet | — |
| Ubuntu 16.04 LTS | radare2 | No fix yet | — |
Show 3 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu Pro 24.04 LTS | radare2 | No fix yet | — |
| Ubuntu Pro 20.04 LTS | radare2 | No fix yet | — |
| Ubuntu Pro 18.04 LTS | radare2 | No fix yet | — |
openSUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| openSUSE Tumbleweed | radare2 | 6.1.4-2.1 | openSUSE-SU-2026:10815-1 |
| openSUSE Leap 16.0 | radare2 | 6.2.2-bp160.1.1 | openSUSE-SU-2026:21988-1 |
Advisories 2
- openSUSE-SU-2026:21988-1 Security update for radare2 SUSE / openSUSE Security Updates · Oct 1, 2026
- openSUSE-SU-2026:10815-1 libsdb2_4_2-6.1.4-2.1 on GA media SUSE / openSUSE Security Updates · May 20, 2026
References
- https://github.com/radareorg/radare2/issues/25835 issue-tracking
- https://github.com/radareorg/radare2/commit/c213ad6894a1eb9086ac8bf5fae35757e9e1683c patch
- https://www.vulncheck.com/advisories/radare2-use-after-free-via-gdbr-threads-list third-party-advisory
- https://github.com/radareorg/radare2/issues/25836 issue-tracking