CVE-2026-70456
published 2026-08-13CVE-2026-70456: rsync 3.0.1 before 3.5.0 contains an out-of-bounds write vulnerability in the read_args() function that allows a malicious sender to corrupt adjacent heap…
PriorityP345high8.2CVSS 3.1
AVNACLPRNUINSUCNILAH
EPSS
0.40%
32.8th percentile
rsync 3.0.1 before 3.5.0 contains an out-of-bounds write vulnerability in the read_args() function that allows a malicious sender to corrupt adjacent heap memory by sending a crafted argument list. When the argument count causes the argv allocation to be exactly full, the trailing NULL terminator is written one slot beyond the allocation boundary, corrupting adjacent heap memory.
Affected
2 ranges
| Vendor | Product | Version range | Fixed in |
|---|---|---|---|
| rsyncproject | rsync | 3.0.1 – 3.4.4 | — |
| samba | rsync | — | — |
CVSS provenance
nvdv3.18.2HIGHCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:H
nvdv4.08.8HIGHCVSS:4.0/AV:N/AC:L/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
vendor_redhat8.2HIGH
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Bugzilla
CVE-2026-70456 rsync-bpc: rsync: Heap Out-of-Bounds Write via crafted argument list [fedora-all]
bugzilla·2026-08-20·CVSS 8.2
CVE-2026-70456 [HIGH] CVE-2026-70456 rsync-bpc: rsync: Heap Out-of-Bounds Write via crafted argument list [fedora-all]
CVE-2026-70456 rsync-bpc: rsync: Heap Out-of-Bounds Write via crafted argument list [fedora-all]
Disclaimer: Community trackers are created by Red Hat Product Security team on a best effort basis. Package maintainers are required to ascertain if the flaw indeed affects their package, before starting the update process.
rsync 3.0.1 before 3.5.0 contains an out-of-bounds write vulnerability in the read_args() function that allows a malicious sender to corrupt adjacent heap memory by sending a crafted argument list. When the argument count causes the argv allocation to be exactly full, the trailing NULL terminator is written one slot beyond the allocation boundary, corrupting adjacent heap memory.
Bugzilla
CVE-2026-70456 rsync: rsync: Heap Out-of-Bounds Write via crafted argument list [fedora-all]
bugzilla·2026-08-20·CVSS 8.2
CVE-2026-70456 [HIGH] CVE-2026-70456 rsync: rsync: Heap Out-of-Bounds Write via crafted argument list [fedora-all]
CVE-2026-70456 rsync: rsync: Heap Out-of-Bounds Write via crafted argument list [fedora-all]
Disclaimer: Community trackers are created by Red Hat Product Security team on a best effort basis. Package maintainers are required to ascertain if the flaw indeed affects their package, before starting the update process.
rsync 3.0.1 before 3.5.0 contains an out-of-bounds write vulnerability in the read_args() function that allows a malicious sender to corrupt adjacent heap memory by sending a crafted argument list. When the argument count causes the argv allocation to be exactly full, the trailing NULL terminator is written one slot beyond the allocation boundary, corrupting adjacent heap memory.
Discussion:
FEDORA-2026-bfae8723e2 (rsync-3.5.0-1.fc44) has been submitted as an update to Fedor
Bugzilla
CVE-2026-70456 rsync-bpc: rsync: Heap Out-of-Bounds Write via crafted argument list [epel-all]
bugzilla·2026-08-20·CVSS 8.2
CVE-2026-70456 [HIGH] CVE-2026-70456 rsync-bpc: rsync: Heap Out-of-Bounds Write via crafted argument list [epel-all]
CVE-2026-70456 rsync-bpc: rsync: Heap Out-of-Bounds Write via crafted argument list [epel-all]
Disclaimer: Community trackers are created by Red Hat Product Security team on a best effort basis. Package maintainers are required to ascertain if the flaw indeed affects their package, before starting the update process.
rsync 3.0.1 before 3.5.0 contains an out-of-bounds write vulnerability in the read_args() function that allows a malicious sender to corrupt adjacent heap memory by sending a crafted argument list. When the argument count causes the argv allocation to be exactly full, the trailing NULL terminator is written one slot beyond the allocation boundary, corrupting adjacent heap memory.
Bugzilla
CVE-2026-70456 rsync: rsync: Heap Out-of-Bounds Write via crafted argument list
bugzilla·2026-08-13·CVSS 8.2
CVE-2026-70456 [HIGH] CVE-2026-70456 rsync: rsync: Heap Out-of-Bounds Write via crafted argument list
CVE-2026-70456 rsync: rsync: Heap Out-of-Bounds Write via crafted argument list
rsync 3.0.1 before 3.5.0 contains an out-of-bounds write vulnerability in the read_args() function that allows a malicious sender to corrupt adjacent heap memory by sending a crafted argument list. When the argument count causes the argv allocation to be exactly full, the trailing NULL terminator is written one slot beyond the allocation boundary, corrupting adjacent heap memory.
2026-08-13
Published