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CVE-2026-53393: Linux

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CVSS

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Вероятност да бъде експлоатирана в следващите 30 дни (EPSS)

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    Описание

    Оригинално описание

    In the Linux kernel, the following vulnerability has been resolved: nfsd: reset write verifier on deferred writeback errors nfsd_vfs_write() and nfsd_commit() both call filemap_check_wb_err() to detect deferred writeback errors, but neither rotates the server's write verifier (nn->writeverf) when this check fails. Every other durable-storage-failure path in these functions calls commit_reset_write_verifier() before returning an error. The missing rotation means clients holding UNSTABLE write data under the current verifier will COMMIT, receive the unchanged verifier back, and conclude their data is durable — silently dropping data that failed writeback. This violates the UNSTABLE+COMMIT durability contract (RFC 1813 §3.3.7, RFC 8881 §18.32). Add commit_reset_write_verifier() calls at both filemap_check_wb_err() error sites, matching the pattern used by adjacent error paths in the same functions. The helper already filters -EAGAIN and -ESTALE internally, so the calls are unconditionally safe.

    Засегнати продукти

    • Linux Linux: f14816f2f928c560d28ba344af689f56efcd6f55 преди b8e5894e56cff70fa245628fe16f0ad6367f8090; 3145fe0ebb16e1715ad541a301bc6675c8375fcd преди bc2baca02ec56da7707a74ed5d340b0a1dff1841; 555dbf1a9aac6d3150c8b52fa35f768a692f4eeb преди 43b65d2997963e80e8d8d86520bcb1e0751227de; 555dbf1a9aac6d3150c8b52fa35f768a692f4eeb преди 666e837b247fcadf2d8d508b9b0e49d720393eb4; 555dbf1a9aac6d3150c8b52fa35f768a692f4eeb преди 1dd664b39774a9c89b72de8e59bf9ef4b3aaff2e; 555dbf1a9aac6d3150c8b52fa35f768a692f4eeb преди 4367afc119c51e17a616f6908772b7e2c2c4013f; 555dbf1a9aac6d3150c8b52fa35f768a692f4eeb преди b027cca33c97354149fcc0ddeede4525c41093cd; 555dbf1a9aac6d3150c8b52fa35f768a692f4eeb преди 2090b05803faab8a9fa62fbff871007862cac1b7; 5.10.124 преди 5.10.261; 5.15.49 преди 5.15.212
    • Linux Linux: 5.17; преди 5.17; 5.10.261 до 5.10.*; 5.15.212 до 5.15.*; 6.1.178 до 6.1.*; 6.6.145 до 6.6.*; 6.12.95 до 6.12.*; 6.18.38 до 6.18.*; 7.1.3 до 7.1.*; от 7.2 нататък

    История

    • 19 юли 2026 Публикувано

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