Critical
radare2 — security advisory
radare2 6.1.5 contains a use-after-free vulnerability in the gdbr_pids_list() function within the GDB client core that allows remote attackers to cause a denial of service or potentially execute arbitrary code by sending malformed thread information responses. Attackers can trigger the vulnerability by causing qsThreadInfo to fail after qfThreadInfo successfully allocates RDebugPid structures, resulting in double-free memory corruption when the error path attempts to clean up the list.
- Products
- radare2
- Affected versions
- 0.9.6-3.1ubuntu1, 1.6.0+dfsg-1, 2.0.0+dfsg-1, 2.1.0+dfsg-1, 2.3.0+dfsg-1, 2.3.0+dfsg-2, 2.3.0+dfsg-2ubuntu0.1~esm1, 3.2.1+dfsg-5build1, 4.0.0+dfsg-1, 4.2.1+dfsg-1, 4.2.1+dfsg-2, 4.2.1+dfsg-2ubuntu0.1~esm1, 5.5.0+dfsg-1.1ubuntu2, 5.5.0+dfsg-1.1ubuntu3, 5.5.0+dfsg-1.1ubuntu3+esm1, 5.5.0+dfsg-1ubuntu1, 5.9.8+dfsg-2, 5.9.8+dfsg-2ubuntu0.25.10.1, 5.9.8+dfsg-2ubuntu0.25.10.2, 6.0.4+dfsg-1, 6.0.7+ds-1, 6.1.6+ds-2, 6.1.6+ds-3, 6.1.8+ds-1
- Fixed versions
- Not specified
- CVEs
- CVE-2026-8696
- Confirmed fixed CVEs
- Not specified
- Updated in this feed
- 31 Oct 2026, 03:24 UTC · Revision 1
Source evidence
radare2 6.1.5 contains a use-after-free vulnerability in the gdbr_pids_list() function within the GDB client core that allows remote attackers to cause a denial of service or potentially execute arbitrary code by sending malformed thread information responses. Attackers can trigger the vulnerability by causing qsThreadInfo to fail after qfThreadInfo successfully allocates RDebugPid structures, resulting in double-free memory corruption when the error path attempts to clean up the list.
osv:UBUNTU-CVE-2026-8696
radare2
Fixed versions: Not specified
radare2
Fixed versions: Not specified
radare2
Fixed versions: Not specified
radare2
Fixed versions: Not specified
radare2
Fixed versions: Not specified
radare2
Fixed versions: Not specified
radare2
Fixed versions: Not specified
Complete source record
{
"id": "884855698a1bd56b65cef113330b8a9a0a6baebdfb213c7acf5ebe28e6532e91",
"url": "https://osv.dev/vulnerability/UBUNTU-CVE-2026-8696",
"method": "structured",
"payload": {
"kind": "advisory",
"title": "UBUNTU-CVE-2026-8696",
"summary": "radare2 6.1.5 contains a use-after-free vulnerability in the gdbr_pids_list() function within the GDB client core that allows remote attackers to cause a denial of service or potentially execute arbitrary code by sending malformed thread information responses. Attackers can trigger the vulnerability by causing qsThreadInfo to fail after qfThreadInfo successfully allocates RDebugPid structures, resulting in double-free memory corruption when the error path attempts to clean up the list.",
"evidence": "osv:UBUNTU-CVE-2026-8696",
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{
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"ecosystem_specific": {
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],
"modified": "2026-10-17T13:01:14.176843429Z",
"provider": "osv",
"upstream": [
"CVE-2026-8696"
],
"references": [
"https://ubuntu.com/security/CVE-2026-8696",
"https://www.cve.org/CVERecord?id=CVE-2026-8696",
"https://github.com/radareorg/radare2/issues/25836",
"https://github.com/radareorg/radare2/commit/c213ad6894a1eb9086ac8bf5fae35757e9e1683c",
"https://www.vulncheck.com/advisories/radare2-use-after-free-via-gdbr-pids-list"
]
},
"related_cves": [
{
"value": "CVE-2026-8696",
"evidence": "/upstream"
}
],
"security_relevant": true,
"severity_evidence": "/severity/1/score"
},
"source_id": "core-osv",
"document_id": 361332,
"published_at": "2026-05-15T21:16:00+00:00"
}