CVE-2026-53185

Aliases:UBUNTU-CVE-2026-53185DEBIAN-CVE-2026-53185CGA-36f3-389w-c2xrCGA-69x4-4xh7-4pj8CGA-7485-vmgv-545hCGA-86xf-558w-fjmxCGA-mh28-5w5p-gq9mCGA-pcqx-3v45-3vw2CGA-pf2g-9j42-7f9fCGA-pr4w-xpm9-h43fCGA-qf2p-q67x-9468CGA-v864-f3pp-xfqxCGA-w854-5w6x-jv4vCGA-wjmg-v867-42gp
Advisory lineage Upstream: 0 Downstream: 26
Modified
Published: 25 Jun 2026, 08:38
Last modified:09 Sept 2026, 12:05

Vulnerability Summary

Overall Risk (default)
medium
31/100
CVSS Score
7.8 HIGH
v3.1 (cve.org)
EPSS Score
0.11% LOW
0% probability 0.00%
KEV
Not listed
Ransomware
No reports
Public exploits
None found
Dark Web
Not detected

Timeline

25 Jun 2026, 08:38
Published
Vulnerability first disclosed
09 Sept 2026, 12:05
Last Modified
Vulnerability information updated

Description

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.

CVSS Metrics

  • v4.0•HIGH•Score: 7.3CVSS:4.0/AV:L/AC:L/AT:P/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N
  • v3.1•HIGH•Score: 7.8CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

EPSS Trends

Current EPSS score: 0.11%• Percentile: 1%

Techniques & Countermeasures

  • CWE-416•Use After Free

    The product reuses or references memory after it has been freed. At some point afterward, the memory may be allocated again and saved in another pointer, while the original pointer references a location somewhere within the new allocation. Any operations using the original pointer are no longer valid because the memory "belongs" to the code that operates on the new pointer.

  • CWE-364•Signal Handler Race Condition

    The product uses a signal handler that introduces a race condition.

Affected Systems

  • chainguard•linux-aws-6.12

    < 6.12.95-r0

  • chainguard•linux-aws-6.18

    < 6.18.38-r0

  • chainguard•linux-azure-6.18

    < 6.18.38-r0

  • chainguard•linux-gcp-6.12

    < 6.12.95-r0

  • chainguard•linux-gcp-6.18

    < 6.18.38-r0

  • chainguard•linux-gcp-6.18-bootc-boot-installed

    < 6.18.38-r0

  • chainguard•linux-qemu-6.12

    < 6.12.95-r0

  • chainguard•linux-qemu-6.18

    < 6.18.38-r0

  • chainguard•linux-qemu-6.18-bootc-boot-installed

    < 6.18.38-r0

  • chainguard•linux-qemu-melange

    < 6.18.38-r0

  • chainguard•linux-vmware-6.12

    < 6.12.95-r0

  • chainguard•linux-vmware-6.18

    < 6.18.38-r0

  • debian•linux

    all | all | < 6.12.94-1 | < 7.0.13-1

  • ubuntu•linux

    all | all | all | all | all | < 7.0.0-31.31

  • ubuntu•linux-allwinner-5.19

    all

  • ubuntu•linux-aws

    all | all | all | all | all | < 7.0.0-1012.12

  • ubuntu•linux-aws-5.0

    all

  • ubuntu•linux-aws-5.11

    all

  • ubuntu•linux-aws-5.13

    all

  • ubuntu•linux-aws-5.15

    all

  • ubuntu•linux-aws-5.19

    all

  • ubuntu•linux-aws-5.3

    all

  • ubuntu•linux-aws-5.4

    all

  • ubuntu•linux-aws-5.8

    all

  • ubuntu•linux-aws-6.14

    all

  • ubuntu•linux-aws-6.17

    all

  • ubuntu•linux-aws-6.2

    all

  • ubuntu•linux-aws-6.5

    all

  • ubuntu•linux-aws-6.8

    all

  • ubuntu•linux-aws-7.0

    all | < 7.0.0-1012.12~24.04.1

  • ubuntu•linux-aws-fips

    all

  • ubuntu•linux-aws-hwe

    all

  • ubuntu•linux-azure

    all | all | all | all | all | all

  • ubuntu•linux-azure-4.15

    all

  • ubuntu•linux-azure-5.11

    all

  • ubuntu•linux-azure-5.13

    all

  • ubuntu•linux-azure-5.15

    all

  • ubuntu•linux-azure-5.19

    all

  • ubuntu•linux-azure-5.3

    all

  • ubuntu•linux-azure-5.4

    all

  • ubuntu•linux-azure-5.8

    all

  • ubuntu•linux-azure-6.11

    all

  • ubuntu•linux-azure-6.14

    all

  • ubuntu•linux-azure-6.17

    all

  • ubuntu•linux-azure-6.2

    all

  • ubuntu•linux-azure-6.5

    all

  • ubuntu•linux-azure-6.8

    all

  • ubuntu•linux-azure-7.0

    all

  • ubuntu•linux-azure-edge

    all

  • ubuntu•linux-azure-fde

    all | all | all | all | all

Showing first 50 affected entries in server-rendered view.

References (26)