zram: fix out-of-bounds access in read_block_state() (Linux Linux)
At a glance
- Source
- NVD
- EPSS
- EPSS 0.18 % · percentile 7 ()
- State
- PUBLISHED
- Published
- Updated
- Assigner
- Linux
- NVD status
- Received
Description
In the Linux kernel, the following vulnerability has been resolved: zram: fix out-of-bounds access in read_block_state() read_block_state() calculates nr_pages before taking dev_lock. If the device is reset and reinitialized with a smaller disksize before lock acquisition, nr_pages still describes the old table. The subsequent loop can then call slot_lock() past the end of the newly allocated table. Read disksize after acquiring dev_lock and checking that the device is initialized. The read lock then keeps the table and its bound stable for the duration of the scan.
References
- https://git.kernel.org/stable/c/fee53224c8261541cf310b57ac7c77a80e144483
- https://git.kernel.org/stable/c/26a55336be91004dbd438f3b89b0c31617459976
- https://git.kernel.org/stable/c/a189cae92e97d90a9553740f5558d6f74446d3d1
- https://git.kernel.org/stable/c/f5e9f3a75efc774f17ab3f33826630d7fe30c7ea
- https://git.kernel.org/stable/c/6d52c1f43ff39ea1ebf8f016e847677f0b60cf2b
- https://git.kernel.org/stable/c/e7dbcb7a561a21e9a8f5b5fa90bb95aefbd0739d
- https://git.kernel.org/stable/c/5e458fa714a55b6b64a9fe0c6d4fa609609f9ec3
- https://git.kernel.org/stable/c/391f057f44a51cc9418da5cba78b014324174264
European references
- ENISA EUVD · EUVD-2026-76631
- GCVE · GCVE-0-2026-89719
CERT-FR advisories
- CERTFR-2026-AVI-1289 — Multiples vulnérabilités dans le noyau Linux de Debian LTS · cert.ssi.gouv.fr
- CERTFR-2026-AVI-1253 — Multiples vulnérabilités dans le noyau Linux de Debian · cert.ssi.gouv.fr
Affected products
| Product | Versions |
|---|---|
| Linux · Linux | affected c0265342bff4fcaa2cdf13f4596244c18d4a7ae5 < fee53224c8261541cf310b57ac7c77a80e144483 ; affected c0265342bff4fcaa2cdf13f4596244c18d4a7ae5 < 26a55336be91004dbd438f3b89b0c31617459976 ; affected c0265342bff4fcaa2cdf13f4596244c18d4a7ae5 < a189cae92e97d90a9553740f5558d6f74446d3d1 ; affected c0265342bff4fcaa2cdf13f4596244c18d4a7ae5 < f5e9f3a75efc774f17ab3f33826630d7fe30c7ea ; affected c0265342bff4fcaa2cdf13f4596244c18d4a7ae5 < 6d52c1f43ff39ea1ebf8f016e847677f0b60cf2b ; affected c0265342bff4fcaa2cdf13f4596244c18d4a7ae5 < e7dbcb7a561a21e9a8f5b5fa90bb95aefbd0739d |
| Linux · Linux | affected 4.18 ; unaffected 0 < 4.18 ; unaffected 5.10.273 ≤ 5.10.* ; unaffected 5.15.224 ≤ 5.15.* ; unaffected 6.1.191 ≤ 6.1.* ; unaffected 6.6.160 ≤ 6.6.* |
Sources
| Source | Licence |
|---|---|
| CVE List (CVEProject cvelistV5) | CVE Program Terms of Use |
| EPSS (FIRST.org) | FIRST — attribution requested |
| ENISA EUVD | ENISA — reproduction authorised, source acknowledged |
| CERT-FR (ANSSI) | Licence Ouverte / Etalab 2.0 |
| NVD (NIST) via fkie-cad/nvd-json-data-feeds | Public domain — this product uses data from the NVD API but is not endorsed or certified by the NVD |