CVE-2026-74362

Summary

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

ext2: fix ignored return value of generic_write_sync()

Fix ext2_dio_write_iter() to propagate the error returned by generic_write_sync() instead of silently discarding it, which could cause write(2) to return success to userspace on O_SYNC/O_DSYNC files even when the sync failed.

The correct pattern, already used in ext2_dax_write_iter() in the same file and in ext4, xfs, f2fs among others, is: if (ret > 0) ret = generic_write_sync(iocb, ret);

Found by Linux Verification Center (linuxtesting.org) with SVACE.

[JK: Reflect also filemap_write_and_wait() return value]

Affected Software

VendorProductVersion RangeStatus
LinuxLinuxfb5de4358e1aa4753dce73c4dc1aca73ff39cedd < 8990dbb7065b0b002b1e58b9091a5b61f5e94dbeaffected
LinuxLinuxfb5de4358e1aa4753dce73c4dc1aca73ff39cedd < 8d70b3973020e59845c0bdad90e0b9c2295fd493affected
LinuxLinuxfb5de4358e1aa4753dce73c4dc1aca73ff39cedd < ffa974b2f50ad8b911b9066d7aed84ad0afabcdbaffected
LinuxLinuxfb5de4358e1aa4753dce73c4dc1aca73ff39cedd < b6bc07e49a5fbb335f56eb90cd63dec6584c77d3affected
LinuxLinuxfb5de4358e1aa4753dce73c4dc1aca73ff39cedd < a4659be0bc7cb1856ffb15b67f903229ae8891ecaffected
LinuxLinux6.5affected
LinuxLinux0 < 6.5unaffected
LinuxLinux6.6.145 <= 6.6.*unaffected
LinuxLinux6.12.97 <= 6.12.*unaffected
LinuxLinux6.18.40 <= 6.18.*unaffected
LinuxLinux7.1.5 <= 7.1.*unaffected
LinuxLinux7.2 <= *unaffected

Weaknesses

References