Vulnerability 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 Score
HIGH
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Linux | Linux Kernel | >= 4.14, < 6.6.143 |
Related Weaknesses (CWE)
References
- https://git.kernel.org/stable/c/0c2821665ff71be3f4b07ecece384669f2877f6aPatch
- https://git.kernel.org/stable/c/198b5a14cca27263b9c14b20114c8092de15dfcbPatch
- https://git.kernel.org/stable/c/732fd9f0b9c1cdc6dfd77162ded60df005182cc0Patch
- https://git.kernel.org/stable/c/77a602b505ce4802915853cfc435a4722fab3e64Patch
- https://git.kernel.org/stable/c/c96786d6ff1acc1d54d9241e97767554c1dfdd5bPatch
- https://access.redhat.com/security/cve/CVE-2026-53185Third Party Advisory
- https://bugzilla.redhat.com/show_bug.cgi?id=2492735Issue TrackingThird Party Advisory
- https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-53185.jsonThird Party Advisory
FAQ
What is CVE-2026-53185?
CVE-2026-53185 is a vulnerability with a CVSS score of 7.8 (HIGH). 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 w...
How severe is CVE-2026-53185?
CVE-2026-53185 has been rated HIGH with a CVSS base score of 7.8/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2026-53185?
Check the references section above for vendor advisories and patch information. Affected products include: Linux Linux Kernel.