CVE catalog
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 s
- Severity
- High · CVSS 8.3
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/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X - Published
- Source
- [NVD] · [CVE record]
- EPSS
- 0.38% · Oct 25, 2026
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.
Vulnerable and fixed packages
Distribution-reported package versions and fixes. These do not depend on matching against the OpenFactory package catalog.
| Distribution | Package | Release | Version | Status |
|---|---|---|---|---|
| Debian | rsync | sid | 3.5.1+ds1-2 | fixed |
| Debian | rsync | forky | 3.5.1+ds1-2 | fixed |
| Debian | rsync | trixie | 3.4.1+ds1-5+deb13u4 | vulnerable |
| Debian | rsync | trixie-security | 3.5.0+ds1-0+deb13u1 | fixed |
| Debian | rsync | bookworm | 3.2.7-1+deb12u6 | vulnerable |
| Debian | rsync | bookworm-security | 3.2.7-1+deb12u5 | vulnerable |
| Cpe | rsync | Not reported | 3.5.0 | fixed |
| Alpine | rsync | 3.21 | 3.5.0-r0 | fixed |
| Alpine | rsync | 3.22 | 3.5.0-r0 | fixed |
| Alpine | rsync | 3.23 | 3.5.0-r0 | fixed |
| Alpine | rsync | 3.24 | 3.5.0-r0 | fixed |
Fixed-version evidence
| Distribution | Package | Type | Release | Fixed version | Urgency | Origin | Bugs |
|---|---|---|---|---|---|---|---|
| Debian | rsync | source | sid | 3.5.0+ds1-1 | not yet assigned | Not reported | Not reported |
| Debian | rsync | source | forky | 3.5.0+ds1-1 | not yet assigned | Not reported | Not reported |
| Debian | rsync | source | trixie | 3.5.0+ds1-0+deb13u1 | not yet assigned | Not reported | Not reported |
| Debian | rsync | source | bookworm | (unfixed) | not yet assigned | Not reported | Not reported |
| Cpe | rsync | cpe | Not reported | 3.5.0 | Not reported | NVD-CVE-2026-70457 | Not reported |
| Alpine | rsync | apk | 3.21 | 3.5.0-r0 | Not reported | ALPINE-CVE-2026-70457 | Not reported |
| Alpine | rsync | apk | 3.22 | 3.5.0-r0 | Not reported | ALPINE-CVE-2026-70457 | Not reported |
| Alpine | rsync | apk | 3.23 | 3.5.0-r0 | Not reported | ALPINE-CVE-2026-70457 | Not reported |
| Alpine | rsync | apk | 3.24 | 3.5.0-r0 | Not reported | ALPINE-CVE-2026-70457 | Not reported |
OpenFactory catalog packages
[Debian 12 (Bookworm)]
- [rsync]Affected
Details (4)
3.2.7-1+deb12u6· amd64 · bookwormAffected
nvd · rsync · debian · bookworm; nvd · rsync · debian · 12
3.2.7-1+deb12u6· arm64 · bookwormAffected
nvd · rsync · debian · bookworm; nvd · rsync · debian · 12
3.2.7-1+deb12u5· amd64 · bookworm-securityAffected
nvd · rsync · debian · bookworm; nvd · rsync · debian · 12
3.2.7-1+deb12u5· arm64 · bookworm-securityAffected
nvd · rsync · debian · bookworm; nvd · rsync · debian · 12
[Debian 13 (Trixie)]
- [rsync]Affected
Details (5)
3.4.1+ds1-5+deb13u4· amd64 · trixieAffected · Fixed:
3.5.0+ds1-0+deb13u1nvd · rsync · debian · 13
3.4.1+ds1-5+deb13u4· arm64 · trixieAffected · Fixed:
3.5.0+ds1-0+deb13u1nvd · rsync · debian · 13
3.4.1+ds1-5+deb13u3· amd64 · trixie-security · Historical versionAffected · Fixed:
3.5.0+ds1-0+deb13u1nvd · rsync · debian · 13
3.4.1+ds1-5+deb13u3· arm64 · trixie-securityAffected · Fixed:
3.5.0+ds1-0+deb13u1nvd · rsync · debian · 13
3.5.0+ds1-0+deb13u1· amd64 · trixie-securityFixed · Fixed:
3.5.0+ds1-0+deb13u1nvd · rsync · debian · 13
Observed:
References
- [https://ftp.suse.com/pub/projects/security/csaf/suse-su-2026_3634-1.json]
- [https://github.com/RsyncProject/rsync/releases/tag/v3.5.0]
- [https://github.com/RsyncProject/rsync/security/advisories/GHSA-pg7g-xqmr-xpfh]
- [https://nvd.nist.gov/vuln/detail/CVE-2026-70457]
- [https://osv.dev/vulnerability/ALPINE-CVE-2026-70457]
- [https://osv.dev/vulnerability/DEBIAN-CVE-2026-70457]
- [https://security-tracker.debian.org/tracker/CVE-2026-70457]
- [https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-70457.json]
- [https://wid.cert-bund.de/.well-known/csaf/white/2026/wid-sec-w-2026-2817.json]
- [https://www.vulncheck.com/advisories/rsync-out-of-bounds-write-via-parse-size-arg]
[CERT-Bund public advisories] · [Debian Security Tracker] · [FIRST EPSS] · [National Vulnerability Database (NVD)] · [OSV Package Vulnerability Database] · [Red Hat security advisories and VEX] · [SUSE security advisories and VEX]