In the Linux kernel, the following vulnerability has been resolved:
ext4: don't BUG if someone dirty pages without asking ext4 first
[un]pin_user_pages_remote is dirtying pages without properly warning the file system in advance. A related race was noted by Jan Kara in 2018[1]; however, more recently instead of it being a very hard-to-hit race, it could be reliably triggered by process_vm_writev(2) which was discovered by Syzbot[2].
This is technically a bug in mm/gup.c, but arguably ext4 is fragile in that if some other kernel subsystem dirty pages without properly notifying the file system using page_mkwrite(), ext4 will BUG, while other file systems will not BUG (although data will still be lost).
So instead of crashing with a BUG, issue a warning (since there may be potential data loss) and just mark the page as clean to avoid unprivileged denial of service attacks until the problem can be properly fixed. More discussion and background can be found in the thread starting at [2].
[1] https://lore.kernel.org/linux-mm/[email protected] [2] https://lore.kernel.org/r/[email protected]
CVSS Details
- CVSS 3.1 Base Score: 5.5
- CVSS 3.1 Vector: (CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H)
Covered by Rapid7
| Product | Vendor Advisory | Solution File | Added | Published |
|---|---|---|---|---|
| Amazon Linux Ami 2 | — | Upgrade kernel-develUpgrade kernel-tools-debuginfoUpgrade kernel-toolsUpgrade kernelUpgrade kernel-debuginfo-common-x86_64Upgrade bpftoolUpgrade bpftool-debuginfoUpgrade kernel-livepatch-5.10.112-108.499Upgrade kernel-debuginfo-common-aarch64Upgrade kernel-livepatch-4.14.276-211.499Upgrade python-perfUpgrade kernel-headersUpgrade python-perf-debuginfoUpgrade kernel-tools-develUpgrade kernel-debuginfoUpgrade perf-debuginfoUpgrade perf | Mar 14, 2025 | Feb 26, 2025 |
| Debian | — | Upgrade linux | Feb 27, 2025 | Feb 27, 2025 |
| Huawei Euleros 2_0_sp12 | — | Upgrade kernel-tools-libsUpgrade kernel-toolsUpgrade bpftoolUpgrade python3-perfUpgrade kernelUpgrade kernel-abi-stablelists | Jun 11, 2025 | Feb 26, 2025 |
| Huawei Euleros 2_0_sp13 | — | Upgrade kernelUpgrade kernel-tools-libsUpgrade bpftoolUpgrade kernel-toolsUpgrade kernel-abi-stablelistsUpgrade python3-perf | Jun 11, 2025 | Feb 26, 2025 |
| Redhat_linux | — | No solution exists | Jul 9, 2025 | Feb 26, 2025 |
| Ubuntu | — | Upgrade linux-ibm-5.4Upgrade linux-awsUpgrade linux-gcp-4.15Upgrade linux-hwe-5.4Upgrade linux-hwe-5.15Upgrade linux-iotUpgrade linux-azure-fipsUpgrade linux-intel-iotg-5.15Upgrade linux-gcp-fipsUpgrade linux-azure-4.15Upgrade linux-azure-5.4Upgrade linux-raspiUpgrade linux-azureUpgrade linux-hweUpgrade linuxUpgrade linux-realtimeUpgrade linux-raspi-5.4Upgrade linux-gcp-5.4Upgrade linux-fipsUpgrade linux-gkeUpgrade linux-aws-5.4Upgrade linux-ibmUpgrade linux-azure-5.15Upgrade linux-oracle-5.4Upgrade linux-lowlatency-hwe-5.15Upgrade linux-kvmUpgrade linux-oracleUpgrade linux-intel-iotgUpgrade linux-lowlatencyUpgrade linux-aws-hweUpgrade linux-aws-fipsUpgrade linux-bluefieldUpgrade linux-gcpUpgrade linux-azure-fde-5.15 | Mar 3, 2025 | Feb 26, 2025 |
| Vmware Photon_os | — | Use 'tdnf update' to upgrade all packages to the latest version. | May 27, 2026 | Feb 26, 2025 |
Prioritise with Active Threat Intelligence
With curated Threat Intelligence, you can see which vulnerabilities truly put you at risk, prioritize what matters most, and act before attackers do.
Explore Intelligence Hub