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Vulnerability · Published May 9, 2025 · Assigned by Linux

CVE-2025-378799p/net: fix improper handling of bogus negative read/write replies

Critical 9.8

In plain English

A critical-severity security flaw 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 0.7% (higher than 54% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.

Severity (CVSS 3.1)9.8Critical
Exploit odds (30 days)0.7%top 46.0% of all CVEs
Exploited in the wildNo reportsnot in CISA KEV
Attack toolingNoneno public tooling known

Official description

In the Linux kernel, the following vulnerability has been resolved: 9p/net: fix improper handling of bogus negative read/write replies In p9_client_write() and p9_client_read_once(), if the server incorrectly replies with success but a negative write/read count then we would consider written (negative) <= rsize (positive) because both variables were signed. Make variables unsigned to avoid this problem. The reproducer linked below now fails with the following error instead of a null pointer deref: 9pnet: bogus RWRITE count (4294967295 > 3)

Affected packages & fixed versions

EcosystemPackageFixed inAdvisory
Debian:12linux6.1.137-1DEBIAN-CVE-2025-37879
Debian:13linux6.12.27-1DEBIAN-CVE-2025-37879
Debian:14linux6.12.27-1DEBIAN-CVE-2025-37879
Ubuntu:22.04:LTSlinuxno fix listedUBUNTU-CVE-2025-37879
Ubuntu:24.04:LTSlinux6.8.0-100.100UBUNTU-CVE-2025-37879
Ubuntu:22.04:LTSlinux-allwinner-5.19no fix listedUBUNTU-CVE-2025-37879
Ubuntu:22.04:LTSlinux-awsno fix listedUBUNTU-CVE-2025-37879
Ubuntu:24.04:LTSlinux-aws6.8.0-1046.49UBUNTU-CVE-2025-37879
Ubuntu:22.04:LTSlinux-aws-5.19no fix listedUBUNTU-CVE-2025-37879
Ubuntu:22.04:LTSlinux-aws-6.2no fix listedUBUNTU-CVE-2025-37879
Ubuntu:22.04:LTSlinux-aws-6.5no fix listedUBUNTU-CVE-2025-37879
Ubuntu:22.04:LTSlinux-aws-6.86.8.0-1046.49~22.04.1UBUNTU-CVE-2025-37879
Ubuntu:22.04:LTSlinux-azureno fix listedUBUNTU-CVE-2025-37879
Ubuntu:24.04:LTSlinux-azure6.8.0-1046.52UBUNTU-CVE-2025-37879
Ubuntu:22.04:LTSlinux-azure-5.19no fix listedUBUNTU-CVE-2025-37879
Ubuntu:24.04:LTSlinux-azure-6.11no fix listedUBUNTU-CVE-2025-37879
Ubuntu:22.04:LTSlinux-azure-6.2no fix listedUBUNTU-CVE-2025-37879
Ubuntu:22.04:LTSlinux-azure-6.5no fix listedUBUNTU-CVE-2025-37879
Ubuntu:22.04:LTSlinux-azure-6.86.8.0-1051.57~22.04.1UBUNTU-CVE-2025-37879
Ubuntu:22.04:LTSlinux-azure-fdeno fix listedUBUNTU-CVE-2025-37879
Ubuntu:24.04:LTSlinux-azure-fde6.8.0-1046.53UBUNTU-CVE-2025-37879
Ubuntu:25.10linux-azure-fdeno fix listedUBUNTU-CVE-2025-37879
Ubuntu:22.04:LTSlinux-azure-fde-5.19no fix listedUBUNTU-CVE-2025-37879
Ubuntu:22.04:LTSlinux-azure-fde-6.2no fix listedUBUNTU-CVE-2025-37879
Ubuntu:22.04:LTSlinux-azure-fde-6.86.8.0-1046.53~22.04.1UBUNTU-CVE-2025-37879
Ubuntu:24.04:LTSlinux-azure-nvidiano fix listedUBUNTU-CVE-2025-37879
Ubuntu:22.04:LTSlinux-gcpno fix listedUBUNTU-CVE-2025-37879
Ubuntu:24.04:LTSlinux-gcp6.8.0-1047.50UBUNTU-CVE-2025-37879
Ubuntu:22.04:LTSlinux-gcp-5.19no fix listedUBUNTU-CVE-2025-37879
Ubuntu:24.04:LTSlinux-gcp-6.11no fix listedUBUNTU-CVE-2025-37879
Ubuntu:24.04:LTSlinux-gcp-6.146.14.0-1011.11~24.04.1UBUNTU-CVE-2025-37879
Ubuntu:22.04:LTSlinux-gcp-6.2no fix listedUBUNTU-CVE-2025-37879
Ubuntu:22.04:LTSlinux-gcp-6.5no fix listedUBUNTU-CVE-2025-37879
Ubuntu:22.04:LTSlinux-gcp-6.86.8.0-1047.50~22.04.2UBUNTU-CVE-2025-37879
Ubuntu:22.04:LTSlinux-gkeno fix listedUBUNTU-CVE-2025-37879
Ubuntu:24.04:LTSlinux-gke6.8.0-1043.48UBUNTU-CVE-2025-37879
Ubuntu:22.04:LTSlinux-gkeopno fix listedUBUNTU-CVE-2025-37879
Ubuntu:24.04:LTSlinux-gkeop6.8.0-1030.33UBUNTU-CVE-2025-37879
Ubuntu:22.04:LTSlinux-hwe-5.19no fix listedUBUNTU-CVE-2025-37879
Ubuntu:24.04:LTSlinux-hwe-6.11no fix listedUBUNTU-CVE-2025-37879
Ubuntu:22.04:LTSlinux-hwe-6.2no fix listedUBUNTU-CVE-2025-37879
Ubuntu:22.04:LTSlinux-hwe-6.5no fix listedUBUNTU-CVE-2025-37879
Ubuntu:22.04:LTSlinux-hwe-6.86.8.0-100.100~22.04.1UBUNTU-CVE-2025-37879
Ubuntu:22.04:LTSlinux-ibmno fix listedUBUNTU-CVE-2025-37879
Ubuntu:24.04:LTSlinux-ibm6.8.0-1044.44UBUNTU-CVE-2025-37879
Ubuntu:22.04:LTSlinux-ibm-6.86.8.0-1044.44~22.04.1UBUNTU-CVE-2025-37879
Ubuntu:24.04:LTSlinux-intelno fix listedUBUNTU-CVE-2025-37879
Ubuntu:22.04:LTSlinux-intel-iot-realtimeno fix listedUBUNTU-CVE-2025-37879
Ubuntu:22.04:LTSlinux-intel-iotgno fix listedUBUNTU-CVE-2025-37879
Ubuntu:22.04:LTSlinux-kvmno fix listedUBUNTU-CVE-2025-37879
Ubuntu:22.04:LTSlinux-lowlatencyno fix listedUBUNTU-CVE-2025-37879
Ubuntu:24.04:LTSlinux-lowlatency6.8.0-100.100.1UBUNTU-CVE-2025-37879
Ubuntu:22.04:LTSlinux-lowlatency-hwe-5.19no fix listedUBUNTU-CVE-2025-37879
Ubuntu:24.04:LTSlinux-lowlatency-hwe-6.11no fix listedUBUNTU-CVE-2025-37879
Ubuntu:22.04:LTSlinux-lowlatency-hwe-6.2no fix listedUBUNTU-CVE-2025-37879
Ubuntu:22.04:LTSlinux-lowlatency-hwe-6.5no fix listedUBUNTU-CVE-2025-37879
Ubuntu:22.04:LTSlinux-lowlatency-hwe-6.86.8.0-100.100.1~22.04.1UBUNTU-CVE-2025-37879
Ubuntu:22.04:LTSlinux-nvidiano fix listedUBUNTU-CVE-2025-37879
Ubuntu:24.04:LTSlinux-nvidia6.8.0-1046.49UBUNTU-CVE-2025-37879
Ubuntu:24.04:LTSlinux-nvidia-6.11no fix listedUBUNTU-CVE-2025-37879
Ubuntu:22.04:LTSlinux-nvidia-6.2no fix listedUBUNTU-CVE-2025-37879
Ubuntu:22.04:LTSlinux-nvidia-6.5no fix listedUBUNTU-CVE-2025-37879
Ubuntu:22.04:LTSlinux-nvidia-6.86.8.0-1046.49~22.04.1UBUNTU-CVE-2025-37879
Ubuntu:24.04:LTSlinux-nvidia-lowlatency6.8.0-1046.49.1UBUNTU-CVE-2025-37879
Ubuntu:22.04:LTSlinux-nvidia-tegrano fix listedUBUNTU-CVE-2025-37879
Ubuntu:24.04:LTSlinux-nvidia-tegra6.8.0-1020.20UBUNTU-CVE-2025-37879
Ubuntu:22.04:LTSlinux-nvidia-tegra-igxno fix listedUBUNTU-CVE-2025-37879
Ubuntu:22.04:LTSlinux-oem-5.17no fix listedUBUNTU-CVE-2025-37879
Ubuntu:22.04:LTSlinux-oem-6.0no fix listedUBUNTU-CVE-2025-37879
Ubuntu:22.04:LTSlinux-oem-6.1no fix listedUBUNTU-CVE-2025-37879
Ubuntu:24.04:LTSlinux-oem-6.11no fix listedUBUNTU-CVE-2025-37879
Ubuntu:22.04:LTSlinux-oem-6.5no fix listedUBUNTU-CVE-2025-37879
Ubuntu:24.04:LTSlinux-oem-6.8no fix listedUBUNTU-CVE-2025-37879
Ubuntu:22.04:LTSlinux-oracleno fix listedUBUNTU-CVE-2025-37879
Ubuntu:24.04:LTSlinux-oracle6.8.0-1043.44UBUNTU-CVE-2025-37879
Ubuntu:22.04:LTSlinux-oracle-6.5no fix listedUBUNTU-CVE-2025-37879
Ubuntu:22.04:LTSlinux-oracle-6.86.8.0-1043.44~22.04.1UBUNTU-CVE-2025-37879
Ubuntu:22.04:LTSlinux-raspino fix listedUBUNTU-CVE-2025-37879
Ubuntu:24.04:LTSlinux-raspi6.8.0-1047.51UBUNTU-CVE-2025-37879
Ubuntu:24.04:LTSlinux-raspi-realtimeno fix listedUBUNTU-CVE-2025-37879
Ubuntu:22.04:LTSlinux-realtimeno fix listedUBUNTU-CVE-2025-37879
Ubuntu:24.04:LTSlinux-realtimeno fix listedUBUNTU-CVE-2025-37879
Ubuntu:22.04:LTSlinux-riscvno fix listedUBUNTU-CVE-2025-37879
Ubuntu:24.04:LTSlinux-riscvno fix listedUBUNTU-CVE-2025-37879
Ubuntu:22.04:LTSlinux-riscv-5.19no fix listedUBUNTU-CVE-2025-37879
Ubuntu:22.04:LTSlinux-riscv-6.5no fix listedUBUNTU-CVE-2025-37879
Ubuntu:22.04:LTSlinux-riscv-6.86.8.0-100.100~22.04.1UBUNTU-CVE-2025-37879
Ubuntu:22.04:LTSlinux-starfive-5.19no fix listedUBUNTU-CVE-2025-37879
Ubuntu:22.04:LTSlinux-starfive-6.2no fix listedUBUNTU-CVE-2025-37879
Ubuntu:22.04:LTSlinux-starfive-6.5no fix listedUBUNTU-CVE-2025-37879
Ubuntu:24.04:LTSlinux-xilinx6.8.0-1023.24UBUNTU-CVE-2025-37879
Ubuntu:22.04:LTSlinux-xilinx-zynqmpno fix listedUBUNTU-CVE-2025-37879

Affected products (as reported)

VendorProductVersions
Linux Linux 070b3656cf228eaaef7b28b59264c5c7cdbdd0fb – before 468ff4a7c61fb811c596a7c44b6a5455e40fd12b070b3656cf228eaaef7b28b59264c5c7cdbdd0fb – before a68768e280b7d0c967ea509e791bb9b90adc94a5070b3656cf228eaaef7b28b59264c5c7cdbdd0fb – before c548f95688e2b5ae0e2ae43d53cf717156c7d034070b3656cf228eaaef7b28b59264c5c7cdbdd0fb – before 374e4cd75617c8c2552f562f39dd989583f5c330070b3656cf228eaaef7b28b59264c5c7cdbdd0fb – before d0259a856afca31d699b706ed5e2adf11086c73b
Linux Linux 4.1

References