CVE-2018-15501
In ng_pkt in transports/smart_pkt.c in libgit2 before 0.26.6 and 0.27.x before 0.27.4, a remote attacker can send a crafted smart-protocol "ng" packet that lacks a '\0' byte to trigger an out-of-bounds read that leads to DoS.
Does this matter?
High impact if exploited, but EPSS currently rates exploitation as unlikely (4.37%). Schedule it in the normal patch cycle and watch for a rise in EPSS or a public exploit.
Description
In ng_pkt in transports/smart_pkt.c in libgit2 before 0.26.6 and 0.27.x before 0.27.4, a remote attacker can send a crafted smart-protocol "ng" packet that lacks a '\0' byte to trigger an out-of-bounds read that leads to DoS.
- CVSS 3.1
- 7.5 HIGHCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
- EPSS
- 4.37% probability · 91th percentile
- Public exploits
- None in Exploit-DB
- CISA KEV
- Not listed
- Weakness
- CWE-125
- Affected
- debian/debian linux · libgit2/libgit2
- Source
- cve@mitre.org
EPSS 4.4% since 27 October 2026; no change recorded yet. Points are recorded when the score first appears and whenever it moves by a percentage point or more.
References
- https://bugs.chromium.org/p/oss-fuzz/issues/detail?id=9406Exploit, Issue Tracking, Patch, Third Party Advisory
- https://bugzilla.suse.com/show_bug.cgi?id=1104641Issue Tracking, Patch, Third Party Advisory
- https://github.com/libgit2/libgit2/commit/1f9a8510e1d2f20ed7334eeeddb92c4dd8e7c649Patch, Third Party Advisory
- https://github.com/libgit2/libgit2/releases/tag/v0.26.6Release Notes, Third Party Advisory
- https://github.com/libgit2/libgit2/releases/tag/v0.27.4Release Notes, Third Party Advisory
- https://lists.debian.org/debian-lts-announce/2018/08/msg00024.htmlMailing List, Third Party Advisory
- https://lists.debian.org/debian-lts-announce/2022/03/msg00031.htmlMailing List, Third Party Advisory
- https://www.pro-linux.de/sicherheit/2/44650/denial-of-service-in-libgit2.htmlThird Party Advisory
- https://bugs.chromium.org/p/oss-fuzz/issues/detail?id=9406Exploit, Issue Tracking, Patch, Third Party Advisory
- https://bugzilla.suse.com/show_bug.cgi?id=1104641Issue Tracking, Patch, Third Party Advisory
- https://github.com/libgit2/libgit2/commit/1f9a8510e1d2f20ed7334eeeddb92c4dd8e7c649Patch, Third Party Advisory
- https://github.com/libgit2/libgit2/releases/tag/v0.26.6Release Notes, Third Party Advisory
- https://github.com/libgit2/libgit2/releases/tag/v0.27.4Release Notes, Third Party Advisory
- https://lists.debian.org/debian-lts-announce/2018/08/msg00024.htmlMailing List, Third Party Advisory
- https://lists.debian.org/debian-lts-announce/2022/03/msg00031.htmlMailing List, Third Party Advisory
- https://www.pro-linux.de/sicherheit/2/44650/denial-of-service-in-libgit2.htmlThird Party Advisory
Source: NVD record, EPSS from FIRST.org, KEV from CISA, exploits from Exploit-DB. Refreshed daily. Download this record as JSON.