kernel: iomap: fix out-of-bounds bitmap_set() with zero-length range

A flaw was found in the Linux kernel's iomap subsystem. An unsigned subtraction underflow occurs when ifssetrangedirty or ifssetrangeuptodate are called with a zero-length range. This can lead to an out-of-bounds write via bitmapset, potentially allowing a local attacker to cause memory corruptio...

UBUNTU-CVE-2026-80720

In the Linux kernel, the following vulnerability has been resolved: iomap: add a separate bioset for iomapsplitioend iomapsplitioend can split bios that already come from iomapioendbioset and thus deadlock when the bioset is exhausted. Add a separate bioset to avoid this deadlock. Christian Braun...

CVE-2026-72367

A flaw was found in the Linux kernel's iomap subsystem. This vulnerability occurs due to an integer underflow when calculating iosize during concurrent file truncation operations. If a file is truncated while writeback is in progress, the iosize can wrap to a large value, leading to incorrect...

CVE-2026-68145

A flaw was found in the Linux kernel's iomap subsystem. An unsigned subtraction underflow occurs when ifssetrangedirty or ifssetrangeuptodate are called with a zero-length range. This can lead to an out-of-bounds write via bitmapset, potentially allowing a local attacker to cause memory corruptio...

PT-2026-69545

Name of the Vulnerable Software and Affected Versions Linux kernel affected versions not specified Description An out-of-bounds write occurs in the iomap subsystem when handling zero-length ranges. The functions ifs set range dirty and ifs set range uptodate calculate the last blk value using a...

CVE-2026-53165

A flaw was found in the Linux kernel's iomap subsystem. A race condition can occur during buffered read error reporting, specifically in the iomapfinishfolioread function. This allows a separate process to clear a folio's mapping while an error is being reported, leading to a null pointer...

PT-2025-38423

Name of the Vulnerable Software and Affected Versions Linux kernel versions prior to 6.0.0-rc5-djwa rc5 3004c9f1de887ebae86015f2677638ce51ee7 Description The Linux kernel contained a vulnerability in the iomap subsystem that could lead to memory corruption when recording errors during writeback...