CVE-2026-31623
net: usb: cdc-phonet: fix skb frags[] overflow in rx_complete()
CVE-2026-31623 is fixed in 35 products on 1 platform, first by DEBIAN-CVE-2026-31623, released May 15, 2026. It is not reported as exploited. Patch Radar priority: High.
High
CVSS
7.1
Moderate
Exploitation
None reported
No vendor assessment
CISA KEV
Not listed
Not in the Known Exploited Vulnerabilities catalog
EPSS
0.0013
2nd percentile
In the Linux kernel, the following vulnerability has been resolved: net: usb: cdc-phonet: fix skb frags[] overflow in rx_complete() A malicious USB device claiming to be a CDC Phonet modem can overflow the skb_shared_info->frags[] array by sending an unbounded sequence of full-page bulk transfers. Drop the skb and increment the length error when the frag limit is reached. This matches the same fix that commit f0813bcd2d9d ("net: wwan: t7xx: fix potential skb->frags overflow in RX path") did for the t7xx driver.
Where it's fixed
| Product | Fixed in | Fix | Released |
|---|---|---|---|
| Linux | |||
| bpftool · ol 8 | 0:5.15.0-323.211.3.3.el9uek | bpftool 0:5.15.0-323.211.3.3.el9uek | Aug 11, 2026 |
| bpftool · ol 9 | 0:5.15.0-323.211.3.3.el9uek | bpftool 0:5.15.0-323.211.3.3.el9uek | Aug 11, 2026 |
| dtb-aarch64 · opensuse-leap 16.0 | 6.12.0-160000.37.1 | OPENSUSE-SU-2026:21555-1 | Aug 12, 2026 |
| kernel-64kb · opensuse-leap 16.0 | 6.12.0-160000.37.1 | OPENSUSE-SU-2026:21555-1 | Aug 12, 2026 |
| kernel-64kb · sles 15.7 | 6.4.0-150700.53.73.2 | SUSE-SU-2026:3166-1 | Jul 21, 2026 |
| kernel-64kb · sles 16.0 | 6.12.0-160000.37.1 | SUSE-SU-2026:23231-1 | Aug 11, 2026 |
| kernel-azure · opensuse-leap 16.0 | 6.12.0-160000.37.1 | OPENSUSE-SU-2026:21555-1 | Aug 12, 2026 |
| kernel-azure · sles 15.7 | 6.4.0-150700.53.73.2 | SUSE-SU-2026:3166-1 | Jul 21, 2026 |
| kernel-azure · sles 16.0 | 6.12.0-160000.37.1 | SUSE-SU-2026:23231-1 | Aug 11, 2026 |
| kernel-default · opensuse-leap 16.0 | 6.12.0-160000.37.1 | OPENSUSE-SU-2026:21555-1 | Aug 12, 2026 |
| kernel-default · sles 15.7 | 6.4.0-150700.53.73.2 | SUSE-SU-2026:3166-1 | Jul 21, 2026 |
| kernel-default · sles 16.0 | 6.12.0-160000.37.1 | SUSE-SU-2026:23237-1 | Aug 11, 2026 |
| kernel-default-base · opensuse-leap 16.0 | 6.12.0-160000.37.1.160000.2.19 | OPENSUSE-SU-2026:21555-1 | Aug 12, 2026 |
| kernel-default-base · sles 15.7 | 6.4.0-150700.53.73.2.150700.17.41.4 | SUSE-SU-2026:3166-1 | Jul 21, 2026 |
| kernel-default-base · sles 16.0 | 6.12.0-160000.37.1.160000.2.19 | SUSE-SU-2026:23231-1 | Aug 11, 2026 |
| kernel-docs · opensuse-leap 16.0 | 6.12.0-160000.37.1 | OPENSUSE-SU-2026:21555-1 | Aug 12, 2026 |
| kernel-docs · sles 15.7 | 6.4.0-150700.53.73.1 | SUSE-SU-2026:3166-1 | Jul 21, 2026 |
| kernel-docs · sles 16.0 | 6.12.0-160000.37.1 | SUSE-SU-2026:23231-1 | Aug 11, 2026 |
| kernel-kvmsmall · opensuse-leap 16.0 | 6.12.0-160000.37.1 | OPENSUSE-SU-2026:21555-1 | Aug 12, 2026 |
| kernel-kvmsmall · sles 16.0 | 6.12.0-160000.37.1 | SUSE-SU-2026:23231-1 | Aug 11, 2026 |
| kernel-livepatch-SLE15-SP7-RT_Update_18 · sles 15.7 | 1-150700.1.5.1 | SUSE-SU-2026:3130-1 | Jul 20, 2026 |
| kernel-livepatch-SLE15-SP7_Update_19 · sles 15.7 | 1-150700.15.3.4 | SUSE-SU-2026:3166-1 | Jul 21, 2026 |
| kernel-obs-build · opensuse-leap 16.0 | 6.12.0-160000.37.1 | OPENSUSE-SU-2026:21555-1 | Aug 12, 2026 |
| kernel-obs-build · sles 15.7 | 6.4.0-150700.53.73.2 | SUSE-SU-2026:3166-1 | Jul 21, 2026 |
| kernel-obs-qa · opensuse-leap 16.0 | 6.12.0-160000.37.1 | OPENSUSE-SU-2026:21555-1 | Aug 12, 2026 |
| kernel-obs-qa · sles 16.0 | 6.12.0-160000.37.1 | SUSE-SU-2026:23231-1 | Aug 11, 2026 |
| kernel-rt · opensuse-leap 16.0 | 6.12.0-160000.37.1 | OPENSUSE-SU-2026:21555-1 | Aug 12, 2026 |
| kernel-source · opensuse-leap 16.0 | 6.12.0-160000.37.1 | OPENSUSE-SU-2026:21555-1 | Aug 12, 2026 |
| kernel-source · sles 15.7 | 6.4.0-150700.53.73.1 | SUSE-SU-2026:3166-1 | Jul 21, 2026 |
| kernel-source · sles 16.0 | 6.12.0-160000.37.1 | SUSE-SU-2026:23231-1 | Aug 11, 2026 |
| kernel-syms · opensuse-leap 16.0 | 6.12.0-160000.37.1 | OPENSUSE-SU-2026:21555-1 | Aug 12, 2026 |
| kernel-syms · sles 15.7 | 6.4.0-150700.53.73.1 | SUSE-SU-2026:3166-1 | Jul 21, 2026 |
| kernel-syms · sles 16.0 | 6.12.0-160000.37.1 | SUSE-SU-2026:23231-1 | Aug 11, 2026 |
| kernel-uek · ol 8 | 0:5.15.0-323.211.3.3.el9uek | kernel-uek 0:5.15.0-323.211.3.3.el9uek | Aug 11, 2026 |
| kernel-uek · ol 9 | 0:5.15.0-323.211.3.3.el9uek | kernel-uek 0:5.15.0-323.211.3.3.el9uek | Aug 11, 2026 |
| kernel-uek-container · ol 8 | 0:5.15.0-323.211.3.3.el9uek | kernel-uek-container 0:5.15.0-323.211.3.3.el9uek | Aug 11, 2026 |
| kernel-uek-container · ol 9 | 0:5.15.0-323.211.3.3.el9uek | kernel-uek-container 0:5.15.0-323.211.3.3.el9uek | Aug 11, 2026 |
| kernel-uek-container-debug · ol 8 | 0:5.15.0-323.211.3.3.el9uek | kernel-uek-container-debug 0:5.15.0-323.211.3.3.el9uek | Aug 11, 2026 |
| kernel-uek-container-debug · ol 9 | 0:5.15.0-323.211.3.3.el9uek | kernel-uek-container-debug 0:5.15.0-323.211.3.3.el9uek | Aug 11, 2026 |
| kernel-uek-core · ol 8 | 0:5.15.0-323.211.3.3.el9uek | kernel-uek-core 0:5.15.0-323.211.3.3.el9uek | Aug 11, 2026 |
| kernel-uek-core · ol 9 | 0:5.15.0-323.211.3.3.el9uek | kernel-uek-core 0:5.15.0-323.211.3.3.el9uek | Aug 11, 2026 |
| kernel-uek-debug · ol 8 | 0:5.15.0-323.211.3.3.el9uek | kernel-uek-debug 0:5.15.0-323.211.3.3.el9uek | Aug 11, 2026 |
| kernel-uek-debug · ol 9 | 0:5.15.0-323.211.3.3.el9uek | kernel-uek-debug 0:5.15.0-323.211.3.3.el9uek | Aug 11, 2026 |
| kernel-uek-debug-core · ol 8 | 0:5.15.0-323.211.3.3.el9uek | kernel-uek-debug-core 0:5.15.0-323.211.3.3.el9uek | Aug 11, 2026 |
| kernel-uek-debug-core · ol 9 | 0:5.15.0-323.211.3.3.el9uek | kernel-uek-debug-core 0:5.15.0-323.211.3.3.el9uek | Aug 11, 2026 |
| kernel-uek-debug-devel · ol 8 | 0:5.15.0-323.211.3.3.el9uek | kernel-uek-debug-devel 0:5.15.0-323.211.3.3.el9uek | Aug 11, 2026 |
| kernel-uek-debug-devel · ol 9 | 0:5.15.0-323.211.3.3.el9uek | kernel-uek-debug-devel 0:5.15.0-323.211.3.3.el9uek | Aug 11, 2026 |
| kernel-uek-debug-modules · ol 8 | 0:5.15.0-323.211.3.3.el9uek | kernel-uek-debug-modules 0:5.15.0-323.211.3.3.el9uek | Aug 11, 2026 |
| kernel-uek-debug-modules · ol 9 | 0:5.15.0-323.211.3.3.el9uek | kernel-uek-debug-modules 0:5.15.0-323.211.3.3.el9uek | Aug 11, 2026 |
| kernel-uek-debug-modules-extra · ol 8 | 0:5.15.0-323.211.3.3.el9uek | kernel-uek-debug-modules-extra 0:5.15.0-323.211.3.3.el9uek | Aug 11, 2026 |
| kernel-uek-debug-modules-extra · ol 9 | 0:5.15.0-323.211.3.3.el9uek | kernel-uek-debug-modules-extra 0:5.15.0-323.211.3.3.el9uek | Aug 11, 2026 |
| kernel-uek-devel · ol 8 | 0:5.15.0-323.211.3.3.el9uek | kernel-uek-devel 0:5.15.0-323.211.3.3.el9uek | Aug 11, 2026 |
| kernel-uek-devel · ol 9 | 0:5.15.0-323.211.3.3.el9uek | kernel-uek-devel 0:5.15.0-323.211.3.3.el9uek | Aug 11, 2026 |
| kernel-uek-doc · ol 8 | 0:5.15.0-323.211.3.3.el9uek | kernel-uek-doc 0:5.15.0-323.211.3.3.el9uek | Aug 11, 2026 |
| kernel-uek-doc · ol 9 | 0:5.15.0-323.211.3.3.el9uek | kernel-uek-doc 0:5.15.0-323.211.3.3.el9uek | Aug 11, 2026 |
| kernel-uek-modules · ol 8 | 0:5.15.0-323.211.3.3.el9uek | kernel-uek-modules 0:5.15.0-323.211.3.3.el9uek | Aug 11, 2026 |
| kernel-uek-modules · ol 9 | 0:5.15.0-323.211.3.3.el9uek | kernel-uek-modules 0:5.15.0-323.211.3.3.el9uek | Aug 11, 2026 |
| kernel-uek-modules-extra · ol 8 | 0:5.15.0-323.211.3.3.el9uek | kernel-uek-modules-extra 0:5.15.0-323.211.3.3.el9uek | Aug 11, 2026 |
| kernel-uek-modules-extra · ol 9 | 0:5.15.0-323.211.3.3.el9uek | kernel-uek-modules-extra 0:5.15.0-323.211.3.3.el9uek | Aug 11, 2026 |
| kernel-uek64k · ol 8 | 0:5.15.0-323.211.3.3.el9uek | kernel-uek64k 0:5.15.0-323.211.3.3.el9uek | Aug 11, 2026 |
| kernel-uek64k · ol 9 | 0:5.15.0-323.211.3.3.el9uek | kernel-uek64k 0:5.15.0-323.211.3.3.el9uek | Aug 11, 2026 |
| kernel-uek64k-core · ol 8 | 0:5.15.0-323.211.3.3.el9uek | kernel-uek64k-core 0:5.15.0-323.211.3.3.el9uek | Aug 11, 2026 |
| kernel-uek64k-core · ol 9 | 0:5.15.0-323.211.3.3.el9uek | kernel-uek64k-core 0:5.15.0-323.211.3.3.el9uek | Aug 11, 2026 |
| kernel-uek64k-devel · ol 8 | 0:5.15.0-323.211.3.3.el9uek | kernel-uek64k-devel 0:5.15.0-323.211.3.3.el9uek | Aug 11, 2026 |
| kernel-uek64k-devel · ol 9 | 0:5.15.0-323.211.3.3.el9uek | kernel-uek64k-devel 0:5.15.0-323.211.3.3.el9uek | Aug 11, 2026 |
| kernel-uek64k-modules · ol 8 | 0:5.15.0-323.211.3.3.el9uek | kernel-uek64k-modules 0:5.15.0-323.211.3.3.el9uek | Aug 11, 2026 |
| kernel-uek64k-modules · ol 9 | 0:5.15.0-323.211.3.3.el9uek | kernel-uek64k-modules 0:5.15.0-323.211.3.3.el9uek | Aug 11, 2026 |
| kernel-uek64k-modules-extra · ol 8 | 0:5.15.0-323.211.3.3.el9uek | kernel-uek64k-modules-extra 0:5.15.0-323.211.3.3.el9uek | Aug 11, 2026 |
| kernel-uek64k-modules-extra · ol 9 | 0:5.15.0-323.211.3.3.el9uek | kernel-uek64k-modules-extra 0:5.15.0-323.211.3.3.el9uek | Aug 11, 2026 |
| kernel-zfcpdump · opensuse-leap 16.0 | 6.12.0-160000.37.1 | OPENSUSE-SU-2026:21555-1 | Aug 12, 2026 |
| kernel-zfcpdump · sles 15.7 | 6.4.0-150700.53.73.2 | SUSE-SU-2026:3166-1 | Jul 21, 2026 |
| kernel-zfcpdump · sles 16.0 | 6.12.0-160000.37.1 | SUSE-SU-2026:23231-1 | Aug 11, 2026 |
| linux · Debian 12.15 (bookworm) | 6.1.176-1 | DEBIAN-CVE-2026-31623 | May 15, 2026 |
| linux · Debian 13.5 (trixie) | 6.12.85-1 | DEBIAN-CVE-2026-31623 | May 15, 2026 |
| linux · Debian 14 | 6.19.14-1 | DEBIAN-CVE-2026-31623 | May 15, 2026 |
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