Vulnerability · Published Sep 24, 2026 · Assigned by mitre
CVE-2026-88373
High 7.5
In plain English
A high-severity null pointer dereference in the libde265 package (Debian). Proof-of-concept exploit code is public. The chance it is exploited in the next 30 days is estimated at 0.4% (higher than 36% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.
Official description
libde265 commit 4d45a6b contains a NULL pointer dereference vulnerability in the NAL parsing path. When de265_push_NAL() is called with a zero-length NAL unit, the resulting NAL_unit may retain a NULL backing buffer, which is subsequently passed as the destination argument to memcpy() in NAL_unit::set_data(). Although the copy length is zero, this violates the nonnull requirement of memcpy() and results in undefined behavior, causing process termination in UBSan-instrumented builds and denial of service.
Affected packages & fixed versions
| Ecosystem | Package | Fixed in | Advisory |
|---|---|---|---|
| Debian:12 | libde265 | no fix listed | DEBIAN-CVE-2026-88373 |
| Debian:13 | libde265 | no fix listed | DEBIAN-CVE-2026-88373 |
| Debian:14 | libde265 | 1.1.2-1 | DEBIAN-CVE-2026-88373 |
| Ubuntu:24.04:LTS | libde265 | 1.0.15-1ubuntu0.2 | UBUNTU-CVE-2026-88373 |
| Ubuntu:24.04:LTS | libde265 | 1.0.15-1ubuntu0.2 | USN-8909-1 |
Affected products (as reported)
Weakness: CWE-476 · Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H