CVE-2026-53185zram: fix use-after-free in zram_bvec_write_partial()
Updated under an hour ago ()
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No exploitation reported and no EPSS estimate yet.
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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
- 7.8 HIGH (v3.1, CNA)CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
- Weakness (CWE)
- CWE-364
- Known exploited
- Not in CISA's KEV catalog
- EPSS (exploitation in the next 30 days)
- Not loaded for this CVE
- Assigned by
- Linux
- NVD analysis
- Modified
- Record last updated
- Oct 16, 2026
- First seen by InfoSec Signals
- Oct 9, 2026
Affected products
Linux Linux linux:linux (from the name) | 8e654f8fbff52ac483fb69957222853d7e2fc588 builds before 0c2821665ff71be3f4b07ecece384669f2877f6a; from 8e654f8fbff52ac483fb69957222853d7e2fc588 before 77a602b505ce4802915853cfc435a4722fab3e64; from 8e654f8fbff52ac483fb69957222853d7e2fc588 before c96786d6ff1acc1d54d9241e97767554c1dfdd5b; from 8e654f8fbff52ac483fb69957222853d7e2fc588 before 198b5a14cca27263b9c14b20114c8092de15dfcb; from 8e654f8fbff52ac483fb69957222853d7e2fc588 before 732fd9f0b9c1cdc6dfd77162ded60df005182cc0 | CNA record |
Red Hat Red Hat Enterprise Linux 10 redhat:enterprise_linux | from 0:6.12.0-211.50.1.el10_2 not affected | CISA ADP |
linux linux_kernel linux:linux_kernel | from 4.14 before 6.6.143; from 6.7 before 6.12.94; from 6.13 before 6.18.36; from 6.19 before 7.0.13; 7.1; 7.1; 7.1; 7.1; and 3 more ranges | NVD |
References
- https://git.kernel.org/stable/c/0c2821665ff71be3f4b07ecece384669f2877f6apatch
- https://git.kernel.org/stable/c/77a602b505ce4802915853cfc435a4722fab3e64patch
- https://git.kernel.org/stable/c/c96786d6ff1acc1d54d9241e97767554c1dfdd5bpatch
- https://git.kernel.org/stable/c/198b5a14cca27263b9c14b20114c8092de15dfcbpatch
- https://git.kernel.org/stable/c/732fd9f0b9c1cdc6dfd77162ded60df005182cc0patch
- https://access.redhat.com/errata/RHSA-2026:59723
- https://access.redhat.com/errata/RHSA-2026:61887
- https://access.redhat.com/errata/RHSA-2026:63013
- https://access.redhat.com/errata/RHSA-2026:63014
- https://access.redhat.com/errata/RHSA-2026:65708
- https://access.redhat.com/security/cve/CVE-2026-53185third-party-advisory
- https://bugzilla.redhat.com/show_bug.cgi?id=2492735issue-tracking, third-party-advisory
- https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-53185.jsonthird-party-advisory
The CVE record on cve.org NVD's entry
The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.