# CVE-2026-63209: Integer Overflow or Wraparound and Out-of-bounds Write in compress CVE-2026-63209 is fixed in 11 products on 1 platform, first by DEBIAN-CVE-2026-63209, released October 1, 2026. It is not reported as exploited. Patch Radar priority: High. - Web page: https://patchblox.com/security/cve/CVE-2026-63209 - Priority: High - CVSS: 7.5 (Important) - EPSS: 0.0057 - CISA KEV: not listed - Exploited (vendor report): no - Publicly disclosed: no - Published: Sep 29, 2026 - Weakness: Integer Overflow or Wraparound - Vendor advisory: https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-63209 ## Description compress provides various compression algorithms. Prior to version 1.18.7, a signed integer overflow vulnerability in s2.NewDict() allows an attacker to bypass repeat index validation by supplying a dictionary with a uvarint-encoded repeat value exceeding MaxInt64. When Dict.Encode() is subsequently called, the overflowed negative repeat value causes an out-of-bounds memory access via unsafe.Pointer arithmetic, crashing the process with SIGSEGV. This issue has been patched in version 1.18.7. ## Where it's fixed | Platform | Product | Fixed in | Fix | Released | |---|---|---|---|---| | Linux | aliyun-cli opensuse-leap 16.0 | 3.5.1-160000.1.1 | [OPENSUSE-SU-2026:22140-1](https://patchblox.com/security/data/fix/linux/opensuse-su-2026-22140-1.md) | Nov 7, 2026 | | Linux | aliyun-cli sles 16.0 | 3.5.1-160000.1.1 | [SUSE-SU-2026:24261-1](https://patchblox.com/security/data/fix/linux/suse-su-2026-24261-1.md) | Nov 7, 2026 | | Linux | amazon-cloudwatch-agent sles 15.6 | 1.300073.0-150400.9.18.1 | [SUSE-SU-2026:4662-1](https://patchblox.com/security/data/fix/linux/suse-su-2026-4662-1.md) | Nov 7, 2026 | | Linux | amazon-cloudwatch-agent sles 15.7 | 1.300073.0-150400.9.18.1 | [SUSE-SU-2026:4662-1](https://patchblox.com/security/data/fix/linux/suse-su-2026-4662-1.md) | Nov 7, 2026 | | Linux | cadvisor opensuse-leap 16.0 | 0.60.6-bp160.1.1 | [OPENSUSE-SU-2026:22117-1](https://patchblox.com/security/data/fix/linux/opensuse-su-2026-22117-1.md) | Nov 7, 2026 | | Linux | distribution opensuse-leap 16.0 | 3.1.1-160000.5.1 | [OPENSUSE-SU-2026:22039-1](https://patchblox.com/security/data/fix/linux/opensuse-su-2026-22039-1.md) | Oct 6, 2026 | | Linux | distribution sles 16.0 | 3.1.1-160000.5.1 | [SUSE-SU-2026:24153-1](https://patchblox.com/security/data/fix/linux/suse-su-2026-24153-1.md) | Oct 6, 2026 | | Linux | gh opensuse-leap 16.0 | 2.102.0-bp160.1.1 | [OPENSUSE-SU-2026:22134-1](https://patchblox.com/security/data/fix/linux/opensuse-su-2026-22134-1.md) | Nov 7, 2026 | | Linux | go-containerregistry opensuse-leap 16.0 | 0.22.1-bp160.1.1 | [OPENSUSE-SU-2026:22227-1](https://patchblox.com/security/data/fix/linux/opensuse-su-2026-22227-1.md) | Nov 7, 2026 | | Linux | golang-github-klauspost-compress Debian 14 | 1.19.0+ds1-1 | [DEBIAN-CVE-2026-63209](https://patchblox.com/security/data/fix/linux/debian-cve-2026-63209.md) | Oct 1, 2026 | | Linux | google-osconfig-agent opensuse-leap 16.0 | 20260928.01-160000.1.1 | [OPENSUSE-SU-2026:22078-1](https://patchblox.com/security/data/fix/linux/opensuse-su-2026-22078-1.md) | Nov 7, 2026 | | Linux | google-osconfig-agent sles 15.6 | 20260928.01-150000.1.70.1 | [SUSE-SU-2026:4661-1](https://patchblox.com/security/data/fix/linux/suse-su-2026-4661-1.md) | Nov 7, 2026 | | Linux | google-osconfig-agent sles 15.7 | 20260928.01-150000.1.70.1 | [SUSE-SU-2026:4661-1](https://patchblox.com/security/data/fix/linux/suse-su-2026-4661-1.md) | Nov 7, 2026 | | Linux | google-osconfig-agent sles 16.0 | 20260928.01-160000.1.1 | [SUSE-SU-2026:24222-1](https://patchblox.com/security/data/fix/linux/suse-su-2026-24222-1.md) | Nov 7, 2026 | | Linux | hauler opensuse-leap 16.0 | 2.1.1-bp160.1.1 | [OPENSUSE-SU-2026:22116-1](https://patchblox.com/security/data/fix/linux/opensuse-su-2026-22116-1.md) | Nov 7, 2026 | | Linux | helm opensuse-leap 16.0 | 4.3.0-160000.2.1 | [OPENSUSE-SU-2026:22057-1](https://patchblox.com/security/data/fix/linux/opensuse-su-2026-22057-1.md) | Nov 7, 2026 | | Linux | helm sles 15.6 | 3.22.1-150000.1.104.1 | [SUSE-SU-2026:5119-1](https://patchblox.com/security/data/fix/linux/suse-su-2026-5119-1.md) | Nov 7, 2026 | | Linux | helm sles 15.7 | 3.22.1-150000.1.104.1 | [SUSE-SU-2026:5119-1](https://patchblox.com/security/data/fix/linux/suse-su-2026-5119-1.md) | Nov 7, 2026 | | Linux | helm sles 16.0 | 4.3.0-160000.2.1 | [SUSE-SU-2026:24247-1](https://patchblox.com/security/data/fix/linux/suse-su-2026-24247-1.md) | Nov 7, 2026 | | Linux | rqlite opensuse-leap 16.0 | 10.6.6-bp160.1.1 | [OPENSUSE-SU-2026:22224-1](https://patchblox.com/security/data/fix/linux/opensuse-su-2026-22224-1.md) | Nov 7, 2026 | --- Data as of 2026-11-08T06:59:42Z UTC. 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