SB20260407108 - Ubuntu update for libarchive
Published: April 7, 2026
Breakdown by Severity
- Low
- Medium
- High
- Critical
Description
This security bulletin contains information about 9 secuirty vulnerabilities.
1) Out-of-bounds read (CVE-ID: CVE-2019-19221)
The vulnerability allows a remote attacker to gain access to potentially sensitive information.
The vulnerability exists due to a boundary condition in "archive_wstring_append_from_mbs" in "archive_string.c" because of an incorrect "mbrtowc" or "mbtowc" call. A remote attacker can create a specially crafted archive file, trick the victim into opening it, trigger out-of-bounds read error and read contents of memory on the system.
2) Integer overflow (CVE-ID: CVE-2024-20696)
The vulnerability allows a remote attacker to execute arbitrary code on the system.
The vulnerability exists due to integer overflow within the rar4 reader in Libarchive. A remote user can trick a victim to open a specially crafted file and execute arbitrary code on the target system.
3) Double free (CVE-ID: CVE-2025-5914)
The vulnerability allows a remote attacker to execute arbitrary code on the target system.
The vulnerability exists due to a boundary error within the archive_read_format_rar_seek_data() function. A remote attacker can pass specially crafted data to the application, trigger a double free error and execute arbitrary code on the target system.
Successful exploitation of this vulnerability may result in complete compromise of vulnerable system.
4) Integer overflow (CVE-ID: CVE-2025-5916)
The vulnerability allows a remote attacker to execute arbitrary code on the target system.
The vulnerability exists due to integer overflow when processing a Web Archive (WARC) file. A remote attacker can pass specially crafted data to the application, trigger an integer overflow and execute arbitrary code on the target system.
Successful exploitation of this vulnerability may result in complete compromise of vulnerable system.
5) Off-by-one (CVE-ID: CVE-2025-5917)
The vulnerability allows a remote attacker to execute arbitrary code on the target system.
The vulnerability exists due to an off-by-one error when handling prefixes and suffixes for file names. A remote attacker can trigger an off-by-one error and execute arbitrary code on the target system.
Successful exploitation of this vulnerability may result in complete compromise of vulnerable system.
6) Out-of-bounds read (CVE-ID: CVE-2025-5918)
The vulnerability allows a remote attacker to gain access to potentially sensitive information.
The vulnerability exists due to a boundary condition when file streams are piped into bsdtar. A remote attacker can create a specially crafted file, trick the victim into opening it, trigger an out-of-bounds read error and read contents of memory on the system.
7) Buffer overflow (CVE-ID: CVE-2025-25724)
The vulnerability allows a remote attacker to execute arbitrary code on the target system.
The vulnerability exists due to a boundary error when processing .tar files within the list_item_verbose() function in tar/util.c. A remote attacker can create a specially crafted archive, trick the victim into opening it, trigger memory corruption and execute arbitrary code on the target system.
Successful exploitation of this vulnerability may result in complete compromise of vulnerable system.
8) Resource exhaustion (CVE-ID: CVE-2025-60753)
The vulnerability allows a remote attacker to perform a denial of service (DoS) attack.
The vulnerability exists due to application does not properly control consumption of internal resources within bsdtar in the "apply_substitution" function in the "tar/subst.c" file. A remote attacker can trigger resource exhaustion and perform a denial of service (DoS) attack.
9) Infinite loop (CVE-ID: CVE-2026-4111)
The vulnerability allows a remote attacker to perform a denial of service (DoS) attack.
The vulnerability exists due to infinite loop in the RAR5 decompression implementation. A remote attacker can pass specially crafted compressed data to the application, consume all available system resources and cause denial of service conditions.
Remediation
Install update from vendor's website.