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CVE-2026-70456

CVE-2026-70456 · rsync 3.0.1 < 3.5.0 Heap Out-of-Bounds Write via read_args()

This page contains facts from public vulnerability sources. Check the original advisory before updating.

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.

CVSS 8.8 · High · EPSS 0.4% · Fix available

Published
Updated

Stack: system

Affected products and versions

  • rsync

    Versions
    • ≥ 3.0.1, ≤ 3.4.4: Affected (semver)
    • 3.5.0: Not affected (semver)

    No fix published

  • rsync Debian:12

    Versions
    • 3.2.7-1
    • 3.2.7-1+deb12u1
    • 3.2.7-1+deb12u2
    • 3.2.7-1+deb12u3
    • 3.2.7-1+deb12u4
    • 3.2.7-1+deb12u5
    • 3.2.7-1+deb12u6
    • 3.3.0+ds1-1
    • 3.3.0+ds1-2
    • 3.3.0+ds1-3
    • 3.3.0+ds1-4
    • 3.3.0-1
    • 3.4.1+ds1-1
    • 3.4.1+ds1-2
    • 3.4.1+ds1-3
    • 3.4.1+ds1-4
    • 3.4.1+ds1-4~exp1
    • 3.4.1+ds1-4~exp2
    • 3.4.1+ds1-5
    • 3.4.1+ds1-5~exp1
    • 3.4.1+ds1-6
    • 3.4.1+ds1-7
    • 3.4.1+ds1-8~exp1
    • 3.4.2+ds1-1
    • 3.4.2+ds1-2
    • 3.4.3+ds1-1
    • 3.4.3+ds1-2
    • 3.4.4+ds1-1
    • 3.5.0+ds1-1
    • 3.5.0+ds1-2
    • 3.5.0+ds1-3
    • 3.5.1+ds1-1
    • 3.5.1+ds1-2
    Affected ranges
    • ECOSYSTEM: (−∞, +∞)

    No fix published

  • rsync Debian:13

    Versions
    • 3.4.1+ds1-5
    • 3.4.1+ds1-5+deb13u1
    • 3.4.1+ds1-5+deb13u2
    • 3.4.1+ds1-5+deb13u3
    • 3.4.1+ds1-5+deb13u4
    • 3.4.1+ds1-6
    • 3.4.1+ds1-7
    • 3.4.1+ds1-8~exp1
    • 3.4.2+ds1-1
    • 3.4.2+ds1-2
    • 3.4.3+ds1-1
    • 3.4.3+ds1-2
    • 3.4.4+ds1-1
    Affected ranges
    • ECOSYSTEM: < 3.5.0+ds1-0+deb13u1

    Update to 3.5.0+ds1-0+deb13u1

  • rsync Debian:14

    Versions
    • 3.4.1+ds1-5
    • 3.4.1+ds1-6
    • 3.4.1+ds1-7
    • 3.4.1+ds1-8~exp1
    • 3.4.2+ds1-1
    • 3.4.2+ds1-2
    • 3.4.3+ds1-1
    • 3.4.3+ds1-2
    • 3.4.4+ds1-1
    Affected ranges
    • ECOSYSTEM: < 3.5.0+ds1-1

    Update to 3.5.0+ds1-1

  • rsync Ubuntu:Pro:14.04:LTS

    Versions
    • 3.0.9-4ubuntu1
    • 3.1.0-2
    • 3.1.0-2ubuntu0.1
    • 3.1.0-2ubuntu0.2
    • 3.1.0-2ubuntu0.3
    • 3.1.0-2ubuntu0.4
    • 3.1.0-2ubuntu0.4+esm1
    • 3.1.0-2ubuntu0.4+esm2
    • 3.1.0-2ubuntu0.4+esm3
    • 3.1.0-2ubuntu0.4+esm4
    Affected ranges
    • ECOSYSTEM: (−∞, +∞)

    No fix published

  • rsync Ubuntu:Pro:16.04:LTS

    Versions
    • 3.1.1-3
    • 3.1.1-3ubuntu1
    • 3.1.1-3ubuntu1.1
    • 3.1.1-3ubuntu1.2
    • 3.1.1-3ubuntu1.3
    • 3.1.1-3ubuntu1.3+esm1
    • 3.1.1-3ubuntu1.3+esm2
    • 3.1.1-3ubuntu1.3+esm3
    • 3.1.1-3ubuntu1.3+esm4
    • 3.1.1-3ubuntu1.3+esm5
    • 3.1.1-3ubuntu1.3+esm6
    Affected ranges
    • ECOSYSTEM: (−∞, +∞)

    No fix published

  • rsync Ubuntu:Pro:18.04:LTS

    Versions
    • 3.1.2-2
    • 3.1.2-2.1
    • 3.1.2-2.1ubuntu1
    • 3.1.2-2.1ubuntu1.1
    • 3.1.2-2.1ubuntu1.2
    • 3.1.2-2.1ubuntu1.3
    • 3.1.2-2.1ubuntu1.4
    • 3.1.2-2.1ubuntu1.5
    • 3.1.2-2.1ubuntu1.6
    • 3.1.2-2.1ubuntu1.6+esm1
    • 3.1.2-2.1ubuntu1.6+esm2
    • 3.1.2-2.1ubuntu1.6+esm3
    • 3.1.2-2.1ubuntu1.6+esm4
    Affected ranges
    • ECOSYSTEM: (−∞, +∞)

    No fix published

  • rsync Ubuntu:Pro:20.04:LTS

    Versions
    • 3.1.3-6
    • 3.1.3-8
    • 3.1.3-8ubuntu0.1
    • 3.1.3-8ubuntu0.2
    • 3.1.3-8ubuntu0.3
    • 3.1.3-8ubuntu0.4
    • 3.1.3-8ubuntu0.5
    • 3.1.3-8ubuntu0.7
    • 3.1.3-8ubuntu0.8
    • 3.1.3-8ubuntu0.9
    • 3.1.3-8ubuntu0.9+esm1
    • 3.1.3-8ubuntu0.9+esm2
    Affected ranges
    • ECOSYSTEM: (−∞, +∞)

    No fix published

  • rsync Ubuntu:22.04:LTS

    Versions
    • 3.2.3-4ubuntu1
    • 3.2.3-4ubuntu2
    • 3.2.3-8ubuntu1
    • 3.2.3-8ubuntu2
    • 3.2.3-8ubuntu3
    • 3.2.3-8ubuntu3.1
    • 3.2.7-0ubuntu0.22.04.2
    • 3.2.7-0ubuntu0.22.04.3
    • 3.2.7-0ubuntu0.22.04.4
    • 3.2.7-0ubuntu0.22.04.6
    • 3.2.7-0ubuntu0.22.04.7
    Affected ranges
    • ECOSYSTEM: (−∞, +∞)

    No fix published

  • rsync Ubuntu:24.04:LTS

    Versions
    • 3.2.7-1
    • 3.2.7-1build1
    • 3.2.7-1build2
    • 3.2.7-1ubuntu1
    • 3.2.7-1ubuntu1.1
    • 3.2.7-1ubuntu1.2
    • 3.2.7-1ubuntu1.4
    • 3.2.7-1ubuntu1.5
    Affected ranges
    • ECOSYSTEM: (−∞, +∞)

    No fix published

  • rsync Ubuntu:26.10

    Versions
    • 3.4.1+ds1-7
    • 3.4.4+ds1-1
    • 3.4.4+ds1-1build1
    • 3.5.0+ds1-2
    Affected ranges
    • ECOSYSTEM: (−∞, +∞)

    No fix published

  • rsync Ubuntu:26.04:LTS

    Versions
    • 3.4.1+ds1-5ubuntu1
    • 3.4.1+ds1-6
    • 3.4.1+ds1-7
    • 3.4.1+ds1-7ubuntu0.2
    • 3.4.1+ds1-7ubuntu0.3
    Affected ranges
    • ECOSYSTEM: (−∞, +∞)

    No fix published

Original sources

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