CVE Watch15 jul 2026

CVE-2026-53185

In the Linux kernel, the following vulnerability has been resolved: zram: fix use-after-free in zram_bvec_write_partial() zram_read_page()

CVSS

7.8

Alto

EPSS

0.1%

KEV

—

Exploit Today

0-100

Publicado: 25 jun 2026 · Última mod.: 15 jul 2026 · CWE-416 · CWE-364

EPSS · 30d

0.1%EPSS · 30 días0.1%

2026-06-302026-07-16

Descripción técnica

In the Linux kernel, the following vulnerability has been resolved: zram: fix use-after-free in zram_bvec_write_partial() zram_read_page() picks the sync or async backing device read path based on whether the parent bio is NULL. zram_bvec_write_partial() passes its parent bio down, so for ZRAM_WB slots the read is dispatched asynchronously and zram_read_page() returns 0 while the bio is still in flight. The caller then runs memcpy_from_bvec(), zram_write_page() and __free_page() on the buffer, leaving the async read to write into a freed page. zram_bvec_read_partial() was switched to NULL in commit 4e3c87b9421d ("zram: fix synchronous reads") for the same reason; the write_partial counterpart was missed.

Referencias oficiales

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