Veille CVE
CVE-2026-53185
7.8 ÉlevéeDescription
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.
Produits concernés
Scores CVSS
| Version | Score | Source | Vecteur |
|---|---|---|---|
| 3.1 | 7.8 Élevée | 416baaa9-dc9f-4396-8d5f-8c081fb06d67 | CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H |
| 3.1 | 7.0 Élevée | 0b0ca135-0b70-47e7-9f44-1890c2a1c46c | CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H |
Faiblesses (CWE)
Références
- https://git.kernel.org/stable/c/0c2821665ff71be3f4b07ecece384669f2877f6a Patch
- https://git.kernel.org/stable/c/198b5a14cca27263b9c14b20114c8092de15dfcb Patch
- https://git.kernel.org/stable/c/732fd9f0b9c1cdc6dfd77162ded60df005182cc0 Patch
- https://git.kernel.org/stable/c/77a602b505ce4802915853cfc435a4722fab3e64 Patch
- https://git.kernel.org/stable/c/c96786d6ff1acc1d54d9241e97767554c1dfdd5b Patch
- 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-2026-53185 Third Party Advisory
- https://bugzilla.redhat.com/show_bug.cgi?id=2492735 Issue TrackingThird Party Advisory
- https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-53185.json Third Party Advisory