https://cve.radiocsirt.org/rss/recent/all/10 Most recent entries from all 2026-10-15T17:38:13.819561+00:00 Vulnerability-Lookup csirt@opendfir.org python-feedgen Contains only the most 10 recent entries. https://cve.radiocsirt.org/vuln/cve-2025-38242 CVE-2025-38242 — mm: userfaultfd: fix race of userfaultfd_move and swap cache 2026-10-15T17:38:13.863160+00:00

Affected: Linux

In the Linux kernel, the following vulnerability has been resolved:

mm: userfaultfd: fix race of userfaultfd_move and swap cache

This commit fixes two kinds of races, they may have different results:

Barry reported a BUG_ON in commit c50f8e6053b0, we may see the same BUG_ON if the filemap lookup returned NULL and folio is added to swap cache after that.

If another kind of race is triggered (folio changed after lookup) we may see RSS counter is corrupted:

[ 406.893936] BUG: Bad rss-counter state mm:ffff0000c5a9ddc0 type:MM_ANONPAGES val:-1 [ 406.894071] BUG: Bad rss-counter state mm:ffff0000c5a9ddc0 type:MM_SHMEMPAGES val:1

Because the folio is being accounted to the wrong VMA.

I'm not sure if there will be any data corruption though, seems no. The issues above are critical already.

On seeing a swap entry PTE, userfaultfd_move does a lockless swap cache lookup, and tries to move the found folio to the faulting vma. Currently, it relies on checking the PTE value to ensure that the moved folio still belongs to the src swap entry and that no new folio has been added to the swap cache, which turns out to be unreliable.

While working and reviewing the swap table series with Barry, following existing races are observed and reproduced [1]:

In the example below, move_pages_pte is moving src_pte to dst_pte, where src_pte is a swap entry PTE holding swap entry S1, and S1 is not in the swap cache:

CPU1 CPU2 userfaultfd_move move_pages_pte(…

 https://cve.radiocsirt.org/vuln/usn-7833-1 USN-7833-1 — linux, linux-aws, linux-gcp, linux-oem-6.14, linux-oracle, linux-oracle-6.14, linux-raspi, linux-realtime vulnerabiliti… 2026-10-15T17:38:13.863315+00:00

Affected: Ubuntu:24.04:LTS: linux-oem-6.14, Ubuntu:24.04:LTS: linux-oracle-6.14

Oleksii Oleksenko, Cedric Fournet, Jana Hofmann, Boris Köpf, Stavros Volos, and Flavien Solt discovered that some AMD processors may allow an attacker to infer data from previous stores, potentially resulting in the leakage of privileged information. A local attacker could possibly use this to expose sensitive information. (CVE-2024-36350, CVE-2024-36357)

Several security issues were discovered in the Linux kernel. An attacker could possibly use these to compromise the system. This update corrects flaws in the following subsystems: - ARM64 architecture; - PowerPC architecture; - RISC-V architecture; - S390 architecture; - x86 architecture; - ACPI drivers; - Serial ATA and Parallel ATA drivers; - Drivers core; - ATA over ethernet (AOE) driver; - Ublk userspace block driver; - Bus devices; - DMA engine subsystem; - Arm Firmware Framework for ARMv8-A(FFA); - Cirrus firmware drivers; - GPU drivers; - HID subsystem; - Hardware monitoring drivers; - I2C subsystem; - InfiniBand drivers; - Input Device (Miscellaneous) drivers; - Multiple devices driver; - Media drivers; - TI TPS6594 PFSM driver; - MMC subsystem; - MTD block device drivers; - Network drivers; - NVME drivers; - x86 platform drivers; - RapidIO drivers; - Voltage and Current Regulator drivers; - Remote Processor subsystem; - S/390 drivers; - SCSI subsystem; - TCM subsystem; - Trusted Execution Environment drivers; - TTY drivers; - ChipIdea USB dr…