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() 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_
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.
- 🔗 git.kernel.org/stable/c/0c2821665ff71be3f4b07ecece384669…
- 🔗 git.kernel.org/stable/c/77a602b505ce4802915853cfc435a472…
- 🔗 git.kernel.org/stable/c/c96786d6ff1acc1d54d9241e97767554…
- 🔗 git.kernel.org/stable/c/198b5a14cca27263b9c14b20114c8092…
- 🔗 git.kernel.org/stable/c/732fd9f0b9c1cdc6dfd77162ded60df0…
- 🔗 access.redhat.com/errata/RHSA-2026:59723
- 🔗 access.redhat.com/errata/RHSA-2026:61887
- 🔗 access.redhat.com/errata/RHSA-2026:63013
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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() 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_
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_bve