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CVE-2026-8695

radare2 6.1.5 Use-After-Free via gdbr_threads_list()

8.7 HighFix available

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.

Attack profile

How easy it is to exploit

Attack vector
Network
Complexity
Low
Privileges needed
None
User interaction
None

What an attacker can affect

Confidentiality
None
Integrity
None
Availability
High

Exploit likelihood

0.63%Up 0.4 points since May 16, 2026
90%50%10%1%

What each source reports

CVE List Score used 8.7

radare2 6.1.5 Use-After-Free via gdbr_threads_list()

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.

Record
CVE-2026-8695
CVSS 4.0
8.7 HighCVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N
CVSS 3.1
7.5 HighCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Weakness
CWE-416
Updated
2026-11-02
EUVDEUVD-2026-30573 8.7

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.

Record
EUVD-2026-30573
CVSS 4.0
8.7 HighCVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N
Updated
2026-11-02
GitHub AdvisoriesGHSA-jrmh-3vm7-w5m4 8.7

radare2 6.1.5 contains a use-after-free vulnerability in the gdbr_threads_list() function that...

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.

Record
GHSA-jrmh-3vm7-w5m4
CVSS 4.0
8.7 HighCVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/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
CVSS 3.1
7.5 HighCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Weakness
CWE-416
Updated
2026-11-02
NVD 8.7

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.

Record
CVE-2026-8695
CVSS 4.0
8.7 HighCVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/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
CVSS 3.1
7.5 HighCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
CVSS 3.1
9.8 CriticalCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Weakness
CWE-416
Updated
2026-11-02
OSV 8.7

radare2 6.1.5 Use-After-Free via gdbr_threads_list()

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.

Record
CVE-2026-8695
CVSS 4.0
8.7 HighCVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N
Weakness
CWE-416
Updated
2026-11-02
OSVUBUNTU-CVE-2026-8695 8.7

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.

Record
UBUNTU-CVE-2026-8695
CVSS 4.0
8.7 HighCVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N
CVSS 3.1
9.8 CriticalCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
CVSS 3.1
7.5 HighCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Updated
2026-11-02
OSVopenSUSE-SU-2026:10815-1 No score

libsdb2_4_2-6.1.4-2.1 on GA media

These are all security issues fixed in the libsdb2_4_2-6.1.4-2.1 package on the GA media of openSUSE Tumbleweed.

Record
openSUSE-SU-2026:10815-1
Updated
2026-11-02
OSVopenSUSE-SU-2026:21988-1 No score

Security update for radare2

This update for radare2 fixes the following issues:

Changes in radare2:

  • Update to version 6.2.2:

    • Analysis: new JNI plugin with typed interface tables, arm64 Swift float calling conventions, DWARF prototype linking, jump-table and switch-case fixes
    • Core: fix RAnalOp leaks in disasm/diff/debug loops, aoj memory use, partial-read handling, fp variable recovery
    • Bundle sdb 2.5.2 (upstream pin): rename shlib to libsdb2_5_2
    • Details can be found here: https://github.com/radareorg/radare2/releases/tag/6.2.2

  • Security issues fixed:

    • CVE-2026-81886: Validate dmp64 page counts against dump size (boo#1282346).
    • CVE-2026-81885: Fix infinite loop in the NE fixup parser (boo#1282345).
    • CVE-2026-81884: Validate Mach-O LC_DATA_IN_CODE ranges (boo#1282344).
    • CVE-2026-81883: Fix Lua function parser OOB reads (boo#1282343).
    • CVE-2026-81882: Fix bplist Unicode string conversion (boo#1282342).
    • CVE-2026-81881: Fix Swift Mach-O field metadata bounds check (boo#1282341).
    • CVE-2026-81880: Decode PEF relocs lazily, add more bounds and overflow checks (boo#1282340).
    • CVE-2026-81879: Fix oobread in ELF PN_XNUM phdr count handling (boo#1282339).
    • CVE-2026-81878: Fix heap write overflow in Python loader (boo#1282338).
    • CVE-2026-14788: Denial of Service via use-after-free in r_core_bin_load function (boo#1270453).
    • CVE-2026-14761: Denial of service via integer overflow in string manipulation functions (boo#1270452).
    • CVE-2026-14760: Denial of Service via local use-after-free vulnerability (boo#1270450).
    • CVE-2026-14759: Denial of Service via heap-based buffer overflow (boo#1270449).
    • CVE-2026-14758: Denial of Service via integer overflow in hexpairs parser (boo#1270447).
    • CVE-2026-14757: Integer overflow allows local impact (boo#1270445).
    • CVE-2026-40527: Command injection vulnerability in the afsv/afsvj (boo#1262336).
    • CVE-2026-4174: Missing validation against an upper limit when allocating memory in the Mach-O file parser can lead to excessive resource consumption (boo#1259722).

  • Security issue fixed with the previous release:

    • CVE-2026-41015: Configured on UNIX without SSL, allows command injection via a PDB name to rabin2 (boo#1262190).
    • CVE-2026-40517: Crafted PDB file with newline characters in symbol names can allow to inject arbitrary commands (boo#1262680).
    • CVE-2026-8695: UAFs in the gdb remote protocol ##crash (boo#1265403).
Record
openSUSE-SU-2026:21988-1
Updated
2026-11-02

Affected products

Affected packages

Affected packages
PackageAffectedFixed
radare2
Ubuntu:16.04:LTS
 All versions, plus listed versions
0.9.6-3.1ubuntu1
 None known
radare2
Ubuntu:Pro:18.04:LTS
 All versions, plus listed versions
1.6.0+dfsg-12.0.0+dfsg-12.1.0+dfsg-12.3.0+dfsg-12.3.0+dfsg-22.3.0+dfsg-2ubuntu0.1~esm1
 None known
radare2
Ubuntu:Pro:20.04:LTS
 All versions, plus listed versions
3.2.1+dfsg-5build14.0.0+dfsg-14.2.1+dfsg-14.2.1+dfsg-24.2.1+dfsg-2ubuntu0.1~esm1
 None known
radare2
Ubuntu:Pro:24.04:LTS
 All versions, plus listed versions
5.5.0+dfsg-1ubuntu15.5.0+dfsg-1.1ubuntu25.5.0+dfsg-1.1ubuntu35.5.0+dfsg-1.1ubuntu3+esm1
 None known
radare2
Ubuntu:25.10
 All versions, plus listed versions
5.9.8+dfsg-25.9.8+dfsg-2ubuntu0.25.10.15.9.8+dfsg-2ubuntu0.25.10.2
 None known
radare2
Ubuntu:26.10
 All versions, plus listed versions
6.0.7+ds-16.1.6+ds-26.1.6+ds-36.1.8+ds-1
 None known
radare2
Ubuntu:26.04:LTS
 All versions, plus listed versions
5.9.8+dfsg-26.0.4+dfsg-16.0.7+ds-1
 None known
radare2
openSUSE:Tumbleweed
 before 6.1.4-2.1
6.1.4-2.1
radare2
openSUSE:Leap 16.0
From an advisory covering 20 CVEs
 before 6.2.2-bp160.1.1
6.2.2-bp160.1.1

History

History
RecordedChangedSources
affected, facts
first indexedCVE List, EUVD, GitHub Advisories, NVD, OSV

Dates are when Every CVE recorded each change. Upstream dates may differ.

In short

CVE-2026-8695 is a high vulnerability (CVSS 8.7) in Radare Radare2, published May 15, 2026. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 0.63%, the 50th percentile. Fixed in radare2 6.1.4-2.1.

References

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