CVE-2026-70457
rsync 3.2.3 before 3.5.0 contains an out-of-bounds write in parse_size_arg() where the return value of snprintf() is used directly as an index into a .bss-segment array without bounds checking. When snprintf truncates the formatted size string, the return value equals the number of characters that would have been written including the truncated portion, and this value may exceed the array length. The subsequent indexed write targets memory outside the intended array bounds, corrupting .bss memory.
Scoring
- Severity
- HIGH
- CVSS base score
- 8.3
- CVSS vector
- CVSS:4.0/AV:N/AC:H/AT:N/PR:N/UI:N/VC:N/VI:L/VA:H/SC:N/SI:N/SA:N
- EPSS probability
- 0.38%
- CWE
- CWE-131, CWE-787
- Published
- 2026-08-13
- Last modified
- 2026-08-14
Affected products
- RsyncProject rsync
- RsyncProject rsync
Weakness type
Related vulnerabilities
- CVE-2026-22590 — Fast-DDS Discovery Server: Out-of-Bounds Read & Heap Memory Disclosure via DATA_FRAG sampleSize / fragmentsInSubmessage
- CVE-2026-69598 — Windows iSCSI Remote Code Execution Vulnerability
- CVE-2026-78221 — An incorrect buffer size calculation in the Windows Interactive Service in OpenVPN 2.7_alpha1...
- CVE-2026-18743 — Popt-devel: popt-static: short realloc in poptconfigfiletostring
- CVE-2026-78002 — Rsyslog: rsyslog: denial of service via heap buffer overflow in rainerscript replace() function
- CVE-2026-44254 — Wazuh: Stack Out-of-Bounds Write in remoted Decompression Path
- CVE-2026-52834 — jxl-oxide: Out-of-bounds writes due to integer overflow in jxl-grid on 32-bit platforms
- CVE-2026-75093 — sonos tract ONNX Initializer Loader tensor.rs from_raw_dt_align buffer size