SB2026093033 - Ubuntu update for imagemagick
Published: September 30, 2026 Updated: September 30, 2026
Breakdown by Severity
- Low
- Medium
- High
- Critical
Description
This security bulletin contains information about 7 vulnerabilities.
1) Out-of-bounds write (CVE-ID: CVE-2026-33535)
CWE-ID: CWE-787 - Out-of-bounds write
CVSSv4: 6.9 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N]
The vulnerability allows a remote attacker to compromise vulnerable system.
The vulnerability exists due to a boundary error when processing untrusted input in the X11 display interaction path. A remote attacker can trigger an out-of-bounds write and perform a denial of service (DoS) attack the target system.
2) Stack-based buffer overflow (CVE-ID: CVE-2026-33536)
CWE-ID: CWE-121 - Stack-based buffer overflow
CVSSv4: 8.2 [CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N]
The vulnerability allows a remote attacker to perform a denial of service (DoS) attack.
The vulnerability exists due to a boundary error in InterpretImageFilename. A remote unauthenticated attacker can trigger stack-based buffer overflow and cause a denial of service condition on the target system.
3) Integer overflow (CVE-ID: CVE-2026-34238)
CWE-ID: CWE-190 - Integer overflow
CVSSv4: 5.7 [CVSS:4.0/AV:L/AC:L/AT:P/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N]
The vulnerability allows a remote attacker to cause a denial of service.
The vulnerability exists due to integer overflow in the despeckle operation when processing crafted input on 32-bit builds. A remote attacker can trigger an out-of-bounds write to cause a denial of service.
Only 32-bit builds are vulnerable.
4) Heap-based buffer overflow (CVE-ID: CVE-2026-40310)
CWE-ID: CWE-122 - Heap-based Buffer Overflow
CVSSv4: 6.9 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N]
The vulnerability allows a remote attacker to cause a denial of service.
The vulnerability exists due to heap-based buffer overflow in the JP2 encoder when processing input with an invalid sampling index. A remote attacker can trick the victim into processing a crafted file to cause a denial of service.
User interaction is required to process the crafted input.
5) Use-after-free (CVE-ID: CVE-2026-40311)
CWE-ID: CWE-416 - Use After Free
CVSSv4: 6.9 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N]
The vulnerability allows a remote attacker to cause a denial of service.
The vulnerability exists due to use-after-free in XMP profile processing when parsing an invalid XMP profile. A remote attacker can trick the victim into opening a crafted file to cause a denial of service.
User interaction is required to process the crafted input.
6) Off-by-one (CVE-ID: CVE-2026-40312)
CWE-ID: CWE-193 - Off-by-one Error
CVSSv4: 6.8 [CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N]
The vulnerability allows a remote attacker to cause a denial of service.
The vulnerability exists due to an off-by-one error in the MSL decoder when parsing a malicious MSL file. A remote attacker can supply a specially crafted MSL file to cause a denial of service.
7) Out-of-bounds read (CVE-ID: CVE-2026-56361)
CWE-ID: CWE-125 - Out-of-bounds read
CVSSv4: 5.1 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N]
The vulnerability allows a remote attacker to cause a denial of service.
The vulnerability exists due to an off-by-one error resulting in an out-of-bounds read in morphology processing when processing an incorrect morphology. A remote attacker can supply a crafted morphology input to cause a denial of service.
User interaction is required to process the crafted input.
Remediation
Install update from vendor's website.