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Vulnerability · Published Aug 10, 2026 · Assigned by Linux

CVE-2026-68144phonet: pep: fix use-after-free in pep_get_sb()

Critical 9.8

In plain English

A critical-severity use-after-free in Linux from Linux. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.5% (higher than 45% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.

Severity (CVSS 3.1)9.8Critical
Exploit odds (30 days)0.5%top 54.6% of all CVEs
Exploited in the wildNo reportsCISA SSVC: none
Attack toolingNoneno public tooling known

Official description

In the Linux kernel, the following vulnerability has been resolved: phonet: pep: fix use-after-free in pep_get_sb() pep_get_sb() doesn't consider that pskb_may_pull() might have relocated the skb data, and continue to access the older pointer, causing UAF. Reproduced under KASAN: BUG: KASAN: slab-use-after-free in pep_get_sb+0x234/0x3b0 Read of size 1 at addr ff11000105510f50 by task repro/157 pep_get_sb+0x234/0x3b0 pipe_handler_do_rcv+0x5f7/0xa10 pep_do_rcv+0x203/0x410 __sk_receive_skb+0x471/0x4a0 phonet_rcv+0x5b3/0x6c0 __netif_receive_skb+0xcc/0x1d0 Refetch the header with skb_header_pointer() after pskb_may_pull(), so the possibly stale pointer is no longer dereferenced. There are better ways to solve this, but, this is the less instrusive one.

Affected packages & fixed versions

EcosystemPackageFixed inAdvisory
Debian:12linux6.1.187-1DEBIAN-CVE-2026-68144
Debian:13linux6.12.101-1DEBIAN-CVE-2026-68144
Debian:14linux7.1.6-1DEBIAN-CVE-2026-68144
Debian:12linux-6.126.12.101-1~deb12u1DEBIAN-CVE-2026-68144
Ubuntu:22.04:LTSlinux5.15.0-198.208UBUNTU-CVE-2026-68144
Ubuntu:24.04:LTSlinux6.8.0-147.147UBUNTU-CVE-2026-68144
Ubuntu:26.04:LTSlinux7.0.0-38.38UBUNTU-CVE-2026-68144
Ubuntu:22.04:LTSlinux-allwinner-5.19no fix listedUBUNTU-CVE-2026-68144
Ubuntu:22.04:LTSlinux-aws5.15.0-1117.124UBUNTU-CVE-2026-68144
Ubuntu:24.04:LTSlinux-aws6.8.0-1067.70UBUNTU-CVE-2026-68144
Ubuntu:26.04:LTSlinux-aws7.0.0-1014.14UBUNTU-CVE-2026-68144
Ubuntu:22.04:LTSlinux-aws-5.19no fix listedUBUNTU-CVE-2026-68144
Ubuntu:24.04:LTSlinux-aws-6.14no fix listedUBUNTU-CVE-2026-68144
Ubuntu:24.04:LTSlinux-aws-6.17no fix listedUBUNTU-CVE-2026-68144
Ubuntu:22.04:LTSlinux-aws-6.2no fix listedUBUNTU-CVE-2026-68144
Ubuntu:22.04:LTSlinux-aws-6.5no fix listedUBUNTU-CVE-2026-68144
Ubuntu:22.04:LTSlinux-aws-6.8no fix listedUBUNTU-CVE-2026-68144
Ubuntu:24.04:LTSlinux-aws-7.07.0.0-1014.14~24.04.1UBUNTU-CVE-2026-68144
Ubuntu:22.04:LTSlinux-azure5.15.0-1123.132UBUNTU-CVE-2026-68144
Ubuntu:24.04:LTSlinux-azure6.8.0-1071.79UBUNTU-CVE-2026-68144
Ubuntu:26.04:LTSlinux-azure7.0.0-1017.17UBUNTU-CVE-2026-68144
Ubuntu:22.04:LTSlinux-azure-5.19no fix listedUBUNTU-CVE-2026-68144
Ubuntu:24.04:LTSlinux-azure-6.11no fix listedUBUNTU-CVE-2026-68144
Ubuntu:24.04:LTSlinux-azure-6.14no fix listedUBUNTU-CVE-2026-68144
Ubuntu:24.04:LTSlinux-azure-6.17no fix listedUBUNTU-CVE-2026-68144
Ubuntu:22.04:LTSlinux-azure-6.2no fix listedUBUNTU-CVE-2026-68144
Ubuntu:22.04:LTSlinux-azure-6.5no fix listedUBUNTU-CVE-2026-68144
Ubuntu:22.04:LTSlinux-azure-6.8no fix listedUBUNTU-CVE-2026-68144
Ubuntu:24.04:LTSlinux-azure-7.07.0.0-1017.17~24.04.1UBUNTU-CVE-2026-68144
Ubuntu:22.04:LTSlinux-azure-fde5.15.0-1122.131UBUNTU-CVE-2026-68144
Ubuntu:24.04:LTSlinux-azure-fde6.8.0-1069.76UBUNTU-CVE-2026-68144
Ubuntu:26.04:LTSlinux-azure-fde7.0.0-1016.16UBUNTU-CVE-2026-68144
Ubuntu:22.04:LTSlinux-azure-fde-5.19no fix listedUBUNTU-CVE-2026-68144
Ubuntu:24.04:LTSlinux-azure-fde-6.14no fix listedUBUNTU-CVE-2026-68144
Ubuntu:24.04:LTSlinux-azure-fde-6.17no fix listedUBUNTU-CVE-2026-68144
Ubuntu:22.04:LTSlinux-azure-fde-6.2no fix listedUBUNTU-CVE-2026-68144
Ubuntu:22.04:LTSlinux-azure-fde-6.8no fix listedUBUNTU-CVE-2026-68144
Ubuntu:24.04:LTSlinux-azure-fde-7.07.0.0-1016.16~24.04.1UBUNTU-CVE-2026-68144
Ubuntu:24.04:LTSlinux-azure-nvidiano fix listedUBUNTU-CVE-2026-68144
Ubuntu:24.04:LTSlinux-azure-nvidia-6.14no fix listedUBUNTU-CVE-2026-68144
Ubuntu:22.04:LTSlinux-gcp5.15.0-1118.128UBUNTU-CVE-2026-68144
Ubuntu:24.04:LTSlinux-gcp6.8.0-1071.79UBUNTU-CVE-2026-68144
Ubuntu:26.04:LTSlinux-gcp7.0.0-1014.14UBUNTU-CVE-2026-68144
Ubuntu:22.04:LTSlinux-gcp-5.19no fix listedUBUNTU-CVE-2026-68144
Ubuntu:24.04:LTSlinux-gcp-6.11no fix listedUBUNTU-CVE-2026-68144
Ubuntu:24.04:LTSlinux-gcp-6.14no fix listedUBUNTU-CVE-2026-68144
Ubuntu:24.04:LTSlinux-gcp-6.17no fix listedUBUNTU-CVE-2026-68144
Ubuntu:22.04:LTSlinux-gcp-6.2no fix listedUBUNTU-CVE-2026-68144
Ubuntu:22.04:LTSlinux-gcp-6.5no fix listedUBUNTU-CVE-2026-68144
Ubuntu:22.04:LTSlinux-gcp-6.8no fix listedUBUNTU-CVE-2026-68144
Ubuntu:24.04:LTSlinux-gcp-7.07.0.0-1014.14~24.04.1UBUNTU-CVE-2026-68144
Ubuntu:22.04:LTSlinux-gke5.15.0-1113.119UBUNTU-CVE-2026-68144
Ubuntu:24.04:LTSlinux-gke6.8.0-1066.74UBUNTU-CVE-2026-68144
Ubuntu:26.04:LTSlinux-gke7.0.0-1008.9UBUNTU-CVE-2026-68144
Ubuntu:22.04:LTSlinux-gkeop5.15.0-1100.108UBUNTU-CVE-2026-68144
Ubuntu:24.04:LTSlinux-gkeop6.8.0-1052.56UBUNTU-CVE-2026-68144
Ubuntu:22.04:LTSlinux-hwe-5.19no fix listedUBUNTU-CVE-2026-68144
Ubuntu:24.04:LTSlinux-hwe-6.11no fix listedUBUNTU-CVE-2026-68144
Ubuntu:24.04:LTSlinux-hwe-6.14no fix listedUBUNTU-CVE-2026-68144
Ubuntu:24.04:LTSlinux-hwe-6.17no fix listedUBUNTU-CVE-2026-68144
Ubuntu:22.04:LTSlinux-hwe-6.2no fix listedUBUNTU-CVE-2026-68144
Ubuntu:22.04:LTSlinux-hwe-6.5no fix listedUBUNTU-CVE-2026-68144
Ubuntu:22.04:LTSlinux-hwe-6.8no fix listedUBUNTU-CVE-2026-68144
Ubuntu:24.04:LTSlinux-hwe-7.07.0.0-38.38~24.04.4UBUNTU-CVE-2026-68144
Ubuntu:22.04:LTSlinux-ibm5.15.0-1111.115UBUNTU-CVE-2026-68144
Ubuntu:24.04:LTSlinux-ibm6.8.0-1067.68UBUNTU-CVE-2026-68144
Ubuntu:26.04:LTSlinux-ibm7.0.0-1015.15UBUNTU-CVE-2026-68144
Ubuntu:22.04:LTSlinux-ibm-6.8no fix listedUBUNTU-CVE-2026-68144
Ubuntu:22.04:LTSlinux-intel-iot-realtimeno fix listedUBUNTU-CVE-2026-68144
Ubuntu:22.04:LTSlinux-intel-iotg5.15.0-1112.118UBUNTU-CVE-2026-68144
Ubuntu:22.04:LTSlinux-kvm5.15.0-1109.114UBUNTU-CVE-2026-68144
Ubuntu:22.04:LTSlinux-lowlatency5.15.0-195.205UBUNTU-CVE-2026-68144
Ubuntu:24.04:LTSlinux-lowlatency6.8.0-147.147.1UBUNTU-CVE-2026-68144
Ubuntu:22.04:LTSlinux-lowlatency-hwe-5.19no fix listedUBUNTU-CVE-2026-68144
Ubuntu:24.04:LTSlinux-lowlatency-hwe-6.11no fix listedUBUNTU-CVE-2026-68144
Ubuntu:22.04:LTSlinux-lowlatency-hwe-6.2no fix listedUBUNTU-CVE-2026-68144
Ubuntu:22.04:LTSlinux-lowlatency-hwe-6.5no fix listedUBUNTU-CVE-2026-68144
Ubuntu:22.04:LTSlinux-lowlatency-hwe-6.8no fix listedUBUNTU-CVE-2026-68144
Ubuntu:22.04:LTSlinux-nvidia5.15.0-1112.113UBUNTU-CVE-2026-68144
Ubuntu:24.04:LTSlinux-nvidiano fix listedUBUNTU-CVE-2026-68144
Ubuntu:26.04:LTSlinux-nvidiano fix listedUBUNTU-CVE-2026-68144
Ubuntu:24.04:LTSlinux-nvidia-6.11no fix listedUBUNTU-CVE-2026-68144
Ubuntu:24.04:LTSlinux-nvidia-6.17no fix listedUBUNTU-CVE-2026-68144
Ubuntu:22.04:LTSlinux-nvidia-6.2no fix listedUBUNTU-CVE-2026-68144
Ubuntu:22.04:LTSlinux-nvidia-6.5no fix listedUBUNTU-CVE-2026-68144
Ubuntu:22.04:LTSlinux-nvidia-6.8no fix listedUBUNTU-CVE-2026-68144
Ubuntu:24.04:LTSlinux-nvidia-7.07.0.0-1024.25~24.04.1UBUNTU-CVE-2026-68144
Ubuntu:26.04:LTSlinux-nvidia-bos7.0.0-2022.23UBUNTU-CVE-2026-68144
Ubuntu:24.04:LTSlinux-nvidia-lowlatencyno fix listedUBUNTU-CVE-2026-68144
Ubuntu:22.04:LTSlinux-nvidia-tegra5.15.0-1070.72UBUNTU-CVE-2026-68144
Ubuntu:24.04:LTSlinux-nvidia-tegra6.8.0-1035.38UBUNTU-CVE-2026-68144
Ubuntu:22.04:LTSlinux-nvidia-tegra-igx5.15.0-1059.59UBUNTU-CVE-2026-68144
Ubuntu:22.04:LTSlinux-oem-5.17no fix listedUBUNTU-CVE-2026-68144
Ubuntu:22.04:LTSlinux-oem-6.0no fix listedUBUNTU-CVE-2026-68144
Ubuntu:22.04:LTSlinux-oem-6.1no fix listedUBUNTU-CVE-2026-68144
Ubuntu:24.04:LTSlinux-oem-6.11no fix listedUBUNTU-CVE-2026-68144
Ubuntu:24.04:LTSlinux-oem-6.14no fix listedUBUNTU-CVE-2026-68144
Ubuntu:24.04:LTSlinux-oem-6.17no fix listedUBUNTU-CVE-2026-68144
Ubuntu:22.04:LTSlinux-oem-6.5no fix listedUBUNTU-CVE-2026-68144
Ubuntu:24.04:LTSlinux-oem-6.8no fix listedUBUNTU-CVE-2026-68144
Ubuntu:26.04:LTSlinux-oem-7.07.0.0-1015.15UBUNTU-CVE-2026-68144
Ubuntu:22.04:LTSlinux-oracle5.15.0-1114.120UBUNTU-CVE-2026-68144
Ubuntu:24.04:LTSlinux-oracle6.8.0-1064.67UBUNTU-CVE-2026-68144
Ubuntu:26.04:LTSlinux-oracle7.0.0-1013.13UBUNTU-CVE-2026-68144
Ubuntu:24.04:LTSlinux-oracle-6.14no fix listedUBUNTU-CVE-2026-68144
Ubuntu:24.04:LTSlinux-oracle-6.17no fix listedUBUNTU-CVE-2026-68144
Ubuntu:22.04:LTSlinux-oracle-6.5no fix listedUBUNTU-CVE-2026-68144
Ubuntu:22.04:LTSlinux-oracle-6.8no fix listedUBUNTU-CVE-2026-68144
Ubuntu:24.04:LTSlinux-oracle-7.07.0.0-1013.13~24.04.1UBUNTU-CVE-2026-68144
Ubuntu:22.04:LTSlinux-raspino fix listedUBUNTU-CVE-2026-68144
Ubuntu:24.04:LTSlinux-raspino fix listedUBUNTU-CVE-2026-68144
Ubuntu:26.04:LTSlinux-raspino fix listedUBUNTU-CVE-2026-68144
Ubuntu:24.04:LTSlinux-raspi-realtimeno fix listedUBUNTU-CVE-2026-68144
Ubuntu:22.04:LTSlinux-realtimeno fix listedUBUNTU-CVE-2026-68144
Ubuntu:24.04:LTSlinux-realtimeno fix listedUBUNTU-CVE-2026-68144
Ubuntu:26.04:LTSlinux-realtime7.0.0-38.38.1UBUNTU-CVE-2026-68144
Ubuntu:22.04:LTSlinux-riscvno fix listedUBUNTU-CVE-2026-68144
Ubuntu:24.04:LTSlinux-riscvno fix listedUBUNTU-CVE-2026-68144
Ubuntu:26.04:LTSlinux-riscv7.0.0-38.38.1UBUNTU-CVE-2026-68144
Ubuntu:22.04:LTSlinux-riscv-5.19no fix listedUBUNTU-CVE-2026-68144
Ubuntu:24.04:LTSlinux-riscv-6.14no fix listedUBUNTU-CVE-2026-68144
Ubuntu:24.04:LTSlinux-riscv-6.17no fix listedUBUNTU-CVE-2026-68144
Ubuntu:22.04:LTSlinux-riscv-6.5no fix listedUBUNTU-CVE-2026-68144
Ubuntu:22.04:LTSlinux-riscv-6.8no fix listedUBUNTU-CVE-2026-68144
Ubuntu:24.04:LTSlinux-riscv-7.07.0.0-38.38.1~24.04.1UBUNTU-CVE-2026-68144
Ubuntu:22.04:LTSlinux-starfive-5.19no fix listedUBUNTU-CVE-2026-68144
Ubuntu:22.04:LTSlinux-starfive-6.2no fix listedUBUNTU-CVE-2026-68144
Ubuntu:22.04:LTSlinux-starfive-6.5no fix listedUBUNTU-CVE-2026-68144
Ubuntu:24.04:LTSlinux-vmware6.8.0-1008.8UBUNTU-CVE-2026-68144
Ubuntu:24.04:LTSlinux-xilinxno fix listedUBUNTU-CVE-2026-68144
Ubuntu:22.04:LTSlinux-xilinx-zynqmp5.15.0-1080.84UBUNTU-CVE-2026-68144

Affected products (as reported)

VendorProductVersions
Linux Linux 9641458d3ec42def729fde64669abf07f3220cd5 – before c4a52cb4da8d57d060b1d52085d25147a238dac29641458d3ec42def729fde64669abf07f3220cd5 – before df198743859fefba2f824115f8151dd62d7ad6d89641458d3ec42def729fde64669abf07f3220cd5 – before 1d81e19fc57a5ee55b4497d01bc0510d76fb95789641458d3ec42def729fde64669abf07f3220cd5 – before 8d931a75a38b9bb584a4071f5ebbd52755fc35ee9641458d3ec42def729fde64669abf07f3220cd5 – before 17f78c0c0d41d738ee236eb6e841e393951880549641458d3ec42def729fde64669abf07f3220cd5 – before a48a889b60f73edb0399a8b08284a2ab0bd0295f9641458d3ec42def729fde64669abf07f3220cd5 – before 25e3641beb51333bfbb155af2fd2573a61113af29641458d3ec42def729fde64669abf07f3220cd5 – before 0f71f852a96af9685858ce59fda34ecbf85c283d
Linux Linux 2.6.28

Weakness: CWE-416 · Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

References