CVE-2026-53185 (GCVE-0-2026-53185)
Vulnerability from cvelistv5
Published
2026-06-25 08:38
Modified
2026-08-26 12:04
Severity ?
7.8 (High) - CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Summary
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.
References
Impacted products
Vendor Product Version
Linux Linux Version: 8e654f8fbff52ac483fb69957222853d7e2fc588
Version: 8e654f8fbff52ac483fb69957222853d7e2fc588
Version: 8e654f8fbff52ac483fb69957222853d7e2fc588
Version: 8e654f8fbff52ac483fb69957222853d7e2fc588
Version: 8e654f8fbff52ac483fb69957222853d7e2fc588
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