CVE-2026-89577

Summary

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

dm-io: report non-retryable errors separatedly

The error codes BLK_STS_NOTSUPP and BLK_STS_INVAL should not cause leg failure on dm-raid1. This patch changes the interface to dm-io, so that it reports two error bitmaps - error_bits and unsup_bits. The unsup_bit bitmap tracks BLK_STS_NOTSUPP or BLK_STS_INVAL errors, the error_bits bitmap tracks all the other errors.

dm-raid1 is changed so that it won't fail a leg if it receives an error in the unsup_bits bitmap.

This patch (with 62dc37a819a5) fixes misbehavior if the user uses unaligned bio vectors on dm-raid1.

Affected Software

VendorProductVersion RangeStatus
LinuxLinux5ff3f74e145adc79b49668adb8de276446acf6be < 49694a363f7ecd5a52d1ea1a13c287ad6d196c35affected
LinuxLinux5ff3f74e145adc79b49668adb8de276446acf6be < 15fc1ec72e1f8089063d298550ada727e18f114aaffected
LinuxLinux5ff3f74e145adc79b49668adb8de276446acf6be < 47a5e62f39875f371bded6e34ffb9cf15ccd813daffected
LinuxLinux6.18affected
LinuxLinux0 < 6.18unaffected
LinuxLinux6.18.50 <= 6.18.*unaffected
LinuxLinux7.2.4 <= 7.2.*unaffected
LinuxLinux7.3-rc1 <= *unaffected

Weaknesses

References