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Vulnerability · Published Apr 2, 2025 · Assigned by Linux

CVE-2025-21988fs/netfs/read_collect: add to next->prev_donated

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 0.4% (higher than 34% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.

Severity (CVSS 3.1)9.8Critical
Exploit odds (30 days)0.4%top 66.1% 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: fs/netfs/read_collect: add to next->prev_donated If multiple subrequests donate data to the same "next" request (depending on the subrequest completion order), each of them would overwrite the `prev_donated` field, causing data corruption and a BUG() crash ("Can't donate prior to front").

Affected packages & fixed versions

EcosystemPackageFixed inAdvisory
Debian:13linux6.12.20-1DEBIAN-CVE-2025-21988
Debian:14linux6.12.20-1DEBIAN-CVE-2025-21988
Ubuntu:25.10linuxno fix listedUBUNTU-CVE-2025-21988
Ubuntu:22.04:LTSlinux-allwinner-5.19no fix listedUBUNTU-CVE-2025-21988
Ubuntu:25.10linux-awsno fix listedUBUNTU-CVE-2025-21988
Ubuntu:22.04:LTSlinux-aws-5.19no fix listedUBUNTU-CVE-2025-21988
Ubuntu:24.04:LTSlinux-aws-6.14no fix listedUBUNTU-CVE-2025-21988
Ubuntu:24.04:LTSlinux-aws-6.17no fix listedUBUNTU-CVE-2025-21988
Ubuntu:22.04:LTSlinux-aws-6.2no fix listedUBUNTU-CVE-2025-21988
Ubuntu:22.04:LTSlinux-aws-6.5no fix listedUBUNTU-CVE-2025-21988
Ubuntu:25.10linux-azureno fix listedUBUNTU-CVE-2025-21988
Ubuntu:22.04:LTSlinux-azure-5.19no fix listedUBUNTU-CVE-2025-21988
Ubuntu:24.04:LTSlinux-azure-6.14no fix listedUBUNTU-CVE-2025-21988
Ubuntu:24.04:LTSlinux-azure-6.17no fix listedUBUNTU-CVE-2025-21988
Ubuntu:22.04:LTSlinux-azure-6.2no fix listedUBUNTU-CVE-2025-21988
Ubuntu:22.04:LTSlinux-azure-6.5no fix listedUBUNTU-CVE-2025-21988
Ubuntu:25.10linux-azure-fdeno fix listedUBUNTU-CVE-2025-21988
Ubuntu:22.04:LTSlinux-azure-fde-5.19no fix listedUBUNTU-CVE-2025-21988
Ubuntu:24.04:LTSlinux-azure-fde-6.14no fix listedUBUNTU-CVE-2025-21988
Ubuntu:22.04:LTSlinux-azure-fde-6.2no fix listedUBUNTU-CVE-2025-21988
Ubuntu:24.04:LTSlinux-azure-nvidia-6.14no fix listedUBUNTU-CVE-2025-21988
Ubuntu:25.10linux-gcpno fix listedUBUNTU-CVE-2025-21988
Ubuntu:22.04:LTSlinux-gcp-5.19no fix listedUBUNTU-CVE-2025-21988
Ubuntu:24.04:LTSlinux-gcp-6.14no fix listedUBUNTU-CVE-2025-21988
Ubuntu:24.04:LTSlinux-gcp-6.17no fix listedUBUNTU-CVE-2025-21988
Ubuntu:22.04:LTSlinux-gcp-6.2no fix listedUBUNTU-CVE-2025-21988
Ubuntu:22.04:LTSlinux-gcp-6.5no fix listedUBUNTU-CVE-2025-21988
Ubuntu:22.04:LTSlinux-hwe-5.19no fix listedUBUNTU-CVE-2025-21988
Ubuntu:24.04:LTSlinux-hwe-6.14no fix listedUBUNTU-CVE-2025-21988
Ubuntu:22.04:LTSlinux-hwe-6.2no fix listedUBUNTU-CVE-2025-21988
Ubuntu:22.04:LTSlinux-hwe-6.5no fix listedUBUNTU-CVE-2025-21988
Ubuntu:22.04:LTSlinux-intel-iot-realtimeno fix listedUBUNTU-CVE-2025-21988
Ubuntu:22.04:LTSlinux-lowlatency-hwe-5.19no fix listedUBUNTU-CVE-2025-21988
Ubuntu:22.04:LTSlinux-lowlatency-hwe-6.2no fix listedUBUNTU-CVE-2025-21988
Ubuntu:22.04:LTSlinux-lowlatency-hwe-6.5no fix listedUBUNTU-CVE-2025-21988
Ubuntu:24.04:LTSlinux-nvidia-6.17no fix listedUBUNTU-CVE-2025-21988
Ubuntu:22.04:LTSlinux-nvidia-6.2no fix listedUBUNTU-CVE-2025-21988
Ubuntu:22.04:LTSlinux-nvidia-6.5no fix listedUBUNTU-CVE-2025-21988
Ubuntu:22.04:LTSlinux-oem-5.17no fix listedUBUNTU-CVE-2025-21988
Ubuntu:22.04:LTSlinux-oem-6.0no fix listedUBUNTU-CVE-2025-21988
Ubuntu:22.04:LTSlinux-oem-6.1no fix listedUBUNTU-CVE-2025-21988
Ubuntu:24.04:LTSlinux-oem-6.14no fix listedUBUNTU-CVE-2025-21988
Ubuntu:22.04:LTSlinux-oem-6.5no fix listedUBUNTU-CVE-2025-21988
Ubuntu:25.10linux-oracleno fix listedUBUNTU-CVE-2025-21988
Ubuntu:24.04:LTSlinux-oracle-6.14no fix listedUBUNTU-CVE-2025-21988
Ubuntu:24.04:LTSlinux-oracle-6.17no fix listedUBUNTU-CVE-2025-21988
Ubuntu:22.04:LTSlinux-oracle-6.5no fix listedUBUNTU-CVE-2025-21988
Ubuntu:25.10linux-raspino fix listedUBUNTU-CVE-2025-21988
Ubuntu:24.04:LTSlinux-raspi-realtimeno fix listedUBUNTU-CVE-2025-21988
Ubuntu:22.04:LTSlinux-realtimeno fix listedUBUNTU-CVE-2025-21988
Ubuntu:24.04:LTSlinux-realtimeno fix listedUBUNTU-CVE-2025-21988
Ubuntu:25.10linux-realtimeno fix listedUBUNTU-CVE-2025-21988
Ubuntu:22.04:LTSlinux-riscvno fix listedUBUNTU-CVE-2025-21988
Ubuntu:25.10linux-riscvno fix listedUBUNTU-CVE-2025-21988
Ubuntu:22.04:LTSlinux-riscv-5.19no fix listedUBUNTU-CVE-2025-21988
Ubuntu:24.04:LTSlinux-riscv-6.14no fix listedUBUNTU-CVE-2025-21988
Ubuntu:24.04:LTSlinux-riscv-6.17no fix listedUBUNTU-CVE-2025-21988
Ubuntu:22.04:LTSlinux-riscv-6.5no fix listedUBUNTU-CVE-2025-21988
Ubuntu:22.04:LTSlinux-starfive-5.19no fix listedUBUNTU-CVE-2025-21988
Ubuntu:22.04:LTSlinux-starfive-6.2no fix listedUBUNTU-CVE-2025-21988
Ubuntu:22.04:LTSlinux-starfive-6.5no fix listedUBUNTU-CVE-2025-21988

Affected products (as reported)

VendorProductVersions
Linux Linux ee4cdf7ba857a894ad1650d6ab77669cbbfa329e – before 62b9ad7e52d4777f7e775ee1f0ad2452f6041024ee4cdf7ba857a894ad1650d6ab77669cbbfa329e – before e25cec3b76aba47a49138d2162fc809c6cd49c9eee4cdf7ba857a894ad1650d6ab77669cbbfa329e – before e2d46f2ec332533816417b60933954173f602121
Linux Linux 6.12

References