What’s Vulnerable › Vulnerabilities

CVE-2026-74362: ext2: fix ignored return value of generic_write_sync()

• Severity: unknown
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.2% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2026-08-15 · updated 2026-08-17

Description

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 products

• Linux kernel: 6.5 — fixed in 7.2

How to fix

Upgrade to a fixed version: Linux kernel 7.2. Check the vendor advisory for mitigations.

References

• https://git.kernel.org/stable/c/8990dbb7065b0b002b1e58b9091a5b61f5e94dbe
• https://git.kernel.org/stable/c/8d70b3973020e59845c0bdad90e0b9c2295fd493
• https://git.kernel.org/stable/c/a4659be0bc7cb1856ffb15b67f903229ae8891ec
• https://git.kernel.org/stable/c/b6bc07e49a5fbb335f56eb90cd63dec6584c77d3
• https://git.kernel.org/stable/c/ffa974b2f50ad8b911b9066d7aed84ad0afabcdb

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