CVE-2026-88373
libde265 commit 4d45a6b contains a NULL pointer dereference vulnerability in the NAL parsing path...
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.
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
What each source reports
CVE List Score used
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.
- Record
CVE-2026-88373- CVSS 3.1
- 7.5 High
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H - Weakness
- CWE-476
- Updated
- 2026-11-02
EUVDEUVD-2026-86314
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.
- Record
EUVD-2026-86314- CVSS 3.1
- 7.5 High
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H - Updated
- 2026-11-02
GitHub AdvisoriesGHSA-24mr-r2pj-2fq7
libde265 commit 4d45a6b contains a NULL pointer dereference vulnerability in the NAL parsing path...
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.
- Record
GHSA-24mr-r2pj-2fq7- CVSS 3.1
- 7.5 High
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H - Weakness
- CWE-476
- Updated
- 2026-11-02
NVD
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.
- Record
CVE-2026-88373- CVSS 3.1
- 7.5 High
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H - Weakness
- CWE-476
- Updated
- 2026-11-02
OSV
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.
- Record
CVE-2026-88373- CVSS 3.1
- 7.5 High
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H - Updated
- 2026-11-02
OSVDEBIAN-CVE-2026-88373
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.
- Record
DEBIAN-CVE-2026-88373- CVSS 3.1
- 7.5 High
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H - Updated
- 2026-11-02
Show 5 moreShow less
OSVUBUNTU-CVE-2026-88373
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.
- Record
UBUNTU-CVE-2026-88373- CVSS 3.1
- 7.5 High
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H - Updated
- 2026-11-02
OSVMGASA-2026-0552 No score
Updated libde265 packages fixes a security vulnerability
Zero-length NAL passed to de265_push_NAL makes memcpy run with a NULL destination. (CVE-2026-88373)
- Record
MGASA-2026-0552- Updated
- 2026-11-02
OSVROOT-OS-DEBIAN-12-CVE-2026-88373 No score
CVE-2026-88373 in libde265 - Patched by Root
Root has patched CVE-2026-88373 in the libde265 package for Root:Debian:12. Multiple fixed versions available.
- Record
ROOT-OS-DEBIAN-12-CVE-2026-88373- Updated
- 2026-11-02
OSVROOT-OS-DEBIAN-13-CVE-2026-88373 No score
CVE-2026-88373 in libde265 - Patched by Root
Root has patched CVE-2026-88373 in the libde265 package for Root:Debian:13. Multiple fixed versions available.
- Record
ROOT-OS-DEBIAN-13-CVE-2026-88373- Updated
- 2026-11-02
OSVUSN-8909-1 No score
libde265 vulnerability
It was discovered that libde265 did not properly validate certain crafted H.265 bitstreams, leading to a NULL pointer dereference. An attacker could possibly use this issue to cause libde265 to crash, resulting in a denial of service.
- Record
USN-8909-1- Updated
- 2026-11-02
Affected packages
| Package | Affected | Fixed |
|---|---|---|
libde265Debian:12 |
All versions, plus listed versions 1.0.11-11.0.11-1+deb12u11.0.11-1+deb12u21.0.11-1+deb12u31.0.12-1 Show 8 moreShow less1.0.12-21.0.13-11.0.15-11.0.16-11.0.18-11.1.1-11.1.2-11.1.3-1 |
None known |
libde265Debian:13 |
All versions, plus listed versions 1.0.15-11.0.15-1+deb13u11.0.15-1+deb13u21.0.16-11.0.18-11.1.1-11.1.2-11.1.3-1 |
None known |
libde265Debian:14 |
before 1.1.2-1, plus listed versions 1.0.15-11.0.16-11.0.18-11.1.1-1 |
1.1.2-1 |
libde265Mageia:10 |
before 1.0.16-4.2.mga10 | 1.0.16-4.2.mga10 |
libde265Mageia:10 |
before 1.0.16-4.2.mga10.tainted | 1.0.16-4.2.mga10.tainted |
libde265Root:Debian:12 |
before 1.0.11-1+deb12u3.aikido.14 | 1.0.11-1+deb12u3.aikido.14 |
rootio-libde265Root:Debian:12 |
before 1.0.11-1+deb12u3.aikido.14 | 1.0.11-1+deb12u3.aikido.14 |
libde265Root:Debian:13 |
before 1.0.15-1+deb13u2.aikido.9 | 1.0.15-1+deb13u2.aikido.9 |
rootio-libde265Root:Debian:13 |
before 1.0.15-1+deb13u2.aikido.9 | 1.0.15-1+deb13u2.aikido.9 |
libde265Ubuntu:Pro:16.04:LTS |
before 1.0.2-2ubuntu0.16.04.1~esm7, plus listed versions 1.0.2-1build11.0.2-21.0.2-2ubuntu0.16.04.1~esm11.0.2-2ubuntu0.16.04.1~esm21.0.2-2ubuntu0.16.04.1~esm31.0.2-2ubuntu0.16.04.1~esm41.0.2-2ubuntu0.16.04.1~esm51.0.2-2ubuntu0.16.04.1~esm6 |
1.0.2-2ubuntu0.16.04.1~esm7 |
Show 5 moreShow less
| Package | Affected | Fixed |
|---|---|---|
libde265Ubuntu:Pro:18.04:LTS |
before 1.0.2-2ubuntu0.18.04.1~esm7, plus listed versions 1.0.2-2build11.0.2-2ubuntu0.18.04.1~esm11.0.2-2ubuntu0.18.04.1~esm21.0.2-2ubuntu0.18.04.1~esm31.0.2-2ubuntu0.18.04.1~esm41.0.2-2ubuntu0.18.04.1~esm51.0.2-2ubuntu0.18.04.1~esm6 |
1.0.2-2ubuntu0.18.04.1~esm7 |
libde265Ubuntu:Pro:20.04:LTS |
before 1.0.4-1ubuntu0.4+esm3, plus listed versions 1.0.3-1build11.0.4-11.0.4-1build11.0.4-1ubuntu0.11.0.4-1ubuntu0.2 Show 4 moreShow less1.0.4-1ubuntu0.31.0.4-1ubuntu0.41.0.4-1ubuntu0.4+esm11.0.4-1ubuntu0.4+esm2 |
1.0.4-1ubuntu0.4+esm3 |
libde265Ubuntu:Pro:22.04:LTS |
before 1.0.8-1ubuntu0.3+esm3, plus listed versions 1.0.8-11.0.8-1ubuntu0.11.0.8-1ubuntu0.21.0.8-1ubuntu0.31.0.8-1ubuntu0.3+esm11.0.8-1ubuntu0.3+esm2 |
1.0.8-1ubuntu0.3+esm3 |
libde265Ubuntu:24.04:LTS |
before 1.0.15-1ubuntu0.2, plus listed versions 1.0.12-21.0.13-11.0.15-11.0.15-1build11.0.15-1build21.0.15-1build31.0.15-1ubuntu0.1 |
1.0.15-1ubuntu0.2 |
libde265Ubuntu:Pro:26.04:LTS |
before 1.0.16-1ubuntu0.1~esm2, plus listed versions 1.0.16-11.0.16-1build11.0.16-1ubuntu0.1~esm1 |
1.0.16-1ubuntu0.1~esm2 |
History
| Recorded | Changed | Sources |
|---|---|---|
| first indexed | CVE List, EUVD, GitHub Advisories, NVD, OSV |
Dates are when Every CVE recorded each change. Upstream dates may differ.
In short
CVE-2026-88373 is a high vulnerability (CVSS 7.5) in libde265, published September 24, 2026. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 0.42%, the 36th percentile. Fixed in libde265 1.1.2-1.
References
github.com/strukturag/libde265/issues/534
nvd.nist.gov/vuln/detail/CVE-2026-88373
security-tracker.debian.org/tracker/CVE-2026-88373