# CVE-2025-39822: linux: In the Linux kernel, the following vulnerability has been resolved: io_uring/kbuf: fix signedness in this_len calcul... CVE-2025-39822 is fixed in 18 products on 1 platform, first by DEBIAN-CVE-2025-39822, released September 16, 2025. It is not reported as exploited. Patch Radar priority: Routine. - Web page: https://patchblox.com/security/cve/CVE-2025-39822 - Priority: Routine - CVSS: 5.5 (medium) - EPSS: 0.0013 - CISA KEV: not listed - Exploited (vendor report): no - Publicly disclosed: no - Published: Sep 16, 2025 ## Description In the Linux kernel, the following vulnerability has been resolved: io_uring/kbuf: fix signedness in this_len calculation When importing and using buffers, buf->len is considered unsigned. However, buf->len is converted to signed int when committing. This can lead to unexpected behavior if the buffer is large enough to be interpreted as a negative value. Make min_t calculation unsigned. ## Where it's fixed | Platform | Product | Fixed in | Fix | Released | |---|---|---|---|---| | Linux | dtb-aarch64 opensuse-leap 16.0 | 6.12.0-160000.8.1 | [OPENSUSE-SU-2025:20172-1](https://patchblox.com/security/data/fix/linux/opensuse-su-2025-20172-1.md) | Dec 19, 2025 | | Linux | kernel-64kb opensuse-leap 16.0 | 6.12.0-160000.8.1 | [OPENSUSE-SU-2025:20172-1](https://patchblox.com/security/data/fix/linux/opensuse-su-2025-20172-1.md) | Dec 19, 2025 | | Linux | kernel-64kb sles 15.7 | 6.4.0-150700.53.25.1 | [SUSE-SU-2025:4393-1](https://patchblox.com/security/data/fix/linux/suse-su-2025-4393-1.md) | Dec 15, 2025 | | Linux | kernel-64kb sles 16.0 | 6.12.0-160000.8.1 | [SUSE-SU-2026:20015-1](https://patchblox.com/security/data/fix/linux/suse-su-2026-20015-1.md) | Dec 19, 2025 | | Linux | kernel-azure sles 15.7 | 6.4.0-150700.20.21.1 | [SUSE-SU-2025:4517-1](https://patchblox.com/security/data/fix/linux/suse-su-2025-4517-1.md) | Dec 23, 2025 | | Linux | kernel-default opensuse-leap 16.0 | 6.12.0-160000.8.1 | [OPENSUSE-SU-2025:20172-1](https://patchblox.com/security/data/fix/linux/opensuse-su-2025-20172-1.md) | Dec 19, 2025 | | Linux | kernel-default sles 15.7 | 6.4.0-150700.53.25.1 | [SUSE-SU-2025:4393-1](https://patchblox.com/security/data/fix/linux/suse-su-2025-4393-1.md) | Dec 15, 2025 | | Linux | kernel-default sles 16.0 | 6.12.0-160000.8.1 | [SUSE-SU-2026:20015-1](https://patchblox.com/security/data/fix/linux/suse-su-2026-20015-1.md) | Dec 19, 2025 | | Linux | kernel-default-base opensuse-leap 16.0 | 6.12.0-160000.8.1.160000.2.5 | [OPENSUSE-SU-2025:20172-1](https://patchblox.com/security/data/fix/linux/opensuse-su-2025-20172-1.md) | Dec 19, 2025 | | Linux | kernel-default-base sles 15.7 | 6.4.0-150700.53.25.1.150700.17.17.1 | [SUSE-SU-2025:4393-1](https://patchblox.com/security/data/fix/linux/suse-su-2025-4393-1.md) | Dec 15, 2025 | | Linux | kernel-default-base sles 16.0 | 6.12.0-160000.8.1.160000.2.5 | [SUSE-SU-2026:20015-1](https://patchblox.com/security/data/fix/linux/suse-su-2026-20015-1.md) | Dec 19, 2025 | | Linux | kernel-docs opensuse-leap 16.0 | 6.12.0-160000.8.1 | [OPENSUSE-SU-2025:20172-1](https://patchblox.com/security/data/fix/linux/opensuse-su-2025-20172-1.md) | Dec 19, 2025 | | Linux | kernel-docs sles 15.7 | 6.4.0-150700.53.25.2 | [SUSE-SU-2025:4393-1](https://patchblox.com/security/data/fix/linux/suse-su-2025-4393-1.md) | Dec 15, 2025 | | Linux | kernel-docs sles 16.0 | 6.12.0-160000.8.1 | [SUSE-SU-2026:20015-1](https://patchblox.com/security/data/fix/linux/suse-su-2026-20015-1.md) | Dec 19, 2025 | | Linux | kernel-kvmsmall opensuse-leap 16.0 | 6.12.0-160000.8.1 | [OPENSUSE-SU-2025:20172-1](https://patchblox.com/security/data/fix/linux/opensuse-su-2025-20172-1.md) | Dec 19, 2025 | | Linux | kernel-kvmsmall sles 16.0 | 6.12.0-160000.8.1 | [SUSE-SU-2026:20015-1](https://patchblox.com/security/data/fix/linux/suse-su-2026-20015-1.md) | Dec 19, 2025 | | Linux | kernel-livepatch-SLE15-SP7-RT_Update_7 sles 15.7 | 1-150700.1.3.1 | [SUSE-SU-2025:4516-1](https://patchblox.com/security/data/fix/linux/suse-su-2025-4516-1.md) | Dec 23, 2025 | | Linux | kernel-livepatch-SLE15-SP7_Update_7 sles 15.7 | 1-150700.15.3.1 | [SUSE-SU-2025:4393-1](https://patchblox.com/security/data/fix/linux/suse-su-2025-4393-1.md) | Dec 15, 2025 | | Linux | kernel-obs-build opensuse-leap 16.0 | 6.12.0-160000.8.1 | [OPENSUSE-SU-2025:20172-1](https://patchblox.com/security/data/fix/linux/opensuse-su-2025-20172-1.md) | Dec 19, 2025 | | Linux | kernel-obs-build sles 15.7 | 6.4.0-150700.53.25.1 | [SUSE-SU-2025:4393-1](https://patchblox.com/security/data/fix/linux/suse-su-2025-4393-1.md) | Dec 15, 2025 | | Linux | kernel-obs-qa opensuse-leap 16.0 | 6.12.0-160000.8.1 | [OPENSUSE-SU-2025:20172-1](https://patchblox.com/security/data/fix/linux/opensuse-su-2025-20172-1.md) | Dec 19, 2025 | | Linux | kernel-obs-qa sles 16.0 | 6.12.0-160000.8.1 | [SUSE-SU-2026:20015-1](https://patchblox.com/security/data/fix/linux/suse-su-2026-20015-1.md) | Dec 19, 2025 | | Linux | kernel-rt opensuse-leap 16.0 | 6.12.0-160000.8.1 | [OPENSUSE-SU-2025:20172-1](https://patchblox.com/security/data/fix/linux/opensuse-su-2025-20172-1.md) | Dec 19, 2025 | | Linux | kernel-source opensuse-leap 16.0 | 6.12.0-160000.8.1 | [OPENSUSE-SU-2025:20172-1](https://patchblox.com/security/data/fix/linux/opensuse-su-2025-20172-1.md) | Dec 19, 2025 | | Linux | kernel-source sles 15.7 | 6.4.0-150700.53.25.1 | [SUSE-SU-2025:4393-1](https://patchblox.com/security/data/fix/linux/suse-su-2025-4393-1.md) | Dec 15, 2025 | | Linux | kernel-source sles 16.0 | 6.12.0-160000.8.1 | [SUSE-SU-2026:20015-1](https://patchblox.com/security/data/fix/linux/suse-su-2026-20015-1.md) | Dec 19, 2025 | | Linux | kernel-source-azure sles 15.7 | 6.4.0-150700.20.21.1 | [SUSE-SU-2025:4517-1](https://patchblox.com/security/data/fix/linux/suse-su-2025-4517-1.md) | Dec 23, 2025 | | Linux | kernel-syms opensuse-leap 16.0 | 6.12.0-160000.8.1 | [OPENSUSE-SU-2025:20172-1](https://patchblox.com/security/data/fix/linux/opensuse-su-2025-20172-1.md) | Dec 19, 2025 | | Linux | kernel-syms sles 15.7 | 6.4.0-150700.53.25.1 | [SUSE-SU-2025:4393-1](https://patchblox.com/security/data/fix/linux/suse-su-2025-4393-1.md) | Dec 15, 2025 | | Linux | kernel-syms sles 16.0 | 6.12.0-160000.8.1 | [SUSE-SU-2026:20015-1](https://patchblox.com/security/data/fix/linux/suse-su-2026-20015-1.md) | Dec 19, 2025 | | Linux | kernel-syms-azure sles 15.7 | 6.4.0-150700.20.21.1 | [SUSE-SU-2025:4517-1](https://patchblox.com/security/data/fix/linux/suse-su-2025-4517-1.md) | Dec 23, 2025 | | Linux | kernel-zfcpdump opensuse-leap 16.0 | 6.12.0-160000.8.1 | [OPENSUSE-SU-2025:20172-1](https://patchblox.com/security/data/fix/linux/opensuse-su-2025-20172-1.md) | Dec 19, 2025 | | Linux | kernel-zfcpdump sles 15.7 | 6.4.0-150700.53.25.1 | [SUSE-SU-2025:4393-1](https://patchblox.com/security/data/fix/linux/suse-su-2025-4393-1.md) | Dec 15, 2025 | | Linux | kernel-zfcpdump sles 16.0 | 6.12.0-160000.8.1 | [SUSE-SU-2026:20015-1](https://patchblox.com/security/data/fix/linux/suse-su-2026-20015-1.md) | Dec 19, 2025 | | Linux | linux Debian 14 | 6.16.5-1 | [DEBIAN-CVE-2025-39822](https://patchblox.com/security/data/fix/linux/debian-cve-2025-39822.md) | Sep 16, 2025 | --- Data as of 2026-11-09T01:18:40Z UTC. 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