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Review reviewHigh

CVE-2026-53185

Linux Linux, Red Hat Enterprise Linux 10, Red Hat Enterprise Linux 6

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 i...

CVSS
7.8
EPSS
0.10%
0.80% percentile
CISA KEV
Not listed
Published
2026.06.25
PRIORITY ASSESSMENT

Review review

The CVSS severity warrants an early asset and exposure review.

Known exploitationNot established by KEV
Exploit probability0.10%
Technical severityCVSS 7.8

Vulnerability overview

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 i...

Affected product and versions

Product
Linux Linux, Red Hat Enterprise Linux 10, Red Hat Enterprise Linux 6
Affected versions
>= 8e654f8fbff52ac483fb69957222853d7e2fc588 < 0c2821665ff71be3f4b07ecece384669f2877f6a, >= 8e654f8fbff52ac483fb69957222853d7e2fc588 < 77a602b505ce4802915853cfc435a4722fab3e64, >= 8e654f8fbff52ac483fb69957222853d7e2fc588 < c96786d6ff1acc1d54d9241e97767554c1dfdd5b, >= 8e654f8fbff52ac483fb69957222853d7e2fc588 < 198b5a14cca27263b9c14b20114c8092de15dfcb, >= 8e654f8fbff52ac483fb69957222853d7e2fc588 < 732fd9f0b9c1cdc6dfd77162ded60df005182cc0, >= 4.14, >= 4.14 < 6.6.143, >= 6.7 < 6.12.94, >= 6.13 < 6.18.36, >= 6.19 < 7.0.13, 7.1
Fixed versions
6.6.143, 6.12.94, 6.18.36, 7.0.13

Recommended response sequence

Confirm exposure before applying a vendor-supported change.

Full remediation guide
  1. 1
    Identify

    Confirm that Linux Linux, Red Hat Enterprise Linux 10, Red Hat Enterprise Linux 6 and an affected version are present.

  2. 2
    Prioritize

    Combine exploitation signals with asset exposure and business criticality.

  3. 3
    Remediate

    Follow the vendor advisory or supported update path and preserve rollback options.

  4. 4
    Verify

    Recheck the version, service health, access paths, and relevant logs.

Technical data

CVSS vector
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
CWE
CWE-364, CWE-416
CVE-2026-53185 — Linux Linux, Red Hat Enterprise Linux 10, Red Hat Enterprise Linux 6 | SECUFOCUS NOW