CVE-2026-89719
zram: fix out-of-bounds access in read_block_state()
CVSS Score
0.0
EPSS Score
0.0%
EPSS Percentile
0th
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.
| Vendor | linux |
| Product | linux |
| Ecosystems | |
| Industries | Technology |
| Published | Sep 11, 2026 |
| Last Updated | Oct 30, 2026 |
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Affected Versions
Linux / Linux
c0265342bff4fcaa2cdf13f4596244c18d4a7ae5 < fee53224c8261541cf310b57ac7c77a80e144483 c0265342bff4fcaa2cdf13f4596244c18d4a7ae5 < 26a55336be91004dbd438f3b89b0c31617459976 c0265342bff4fcaa2cdf13f4596244c18d4a7ae5 < a189cae92e97d90a9553740f5558d6f74446d3d1 c0265342bff4fcaa2cdf13f4596244c18d4a7ae5 < f5e9f3a75efc774f17ab3f33826630d7fe30c7ea c0265342bff4fcaa2cdf13f4596244c18d4a7ae5 < 6d52c1f43ff39ea1ebf8f016e847677f0b60cf2b c0265342bff4fcaa2cdf13f4596244c18d4a7ae5 < e7dbcb7a561a21e9a8f5b5fa90bb95aefbd0739d c0265342bff4fcaa2cdf13f4596244c18d4a7ae5 < 5e458fa714a55b6b64a9fe0c6d4fa609609f9ec3 c0265342bff4fcaa2cdf13f4596244c18d4a7ae5 < 391f057f44a51cc9418da5cba78b014324174264
Linux / Linux
4.18
References
git.kernel.org: https://git.kernel.org/stable/c/fee53224c8261541cf310b57ac7c77a80e144483 git.kernel.org: https://git.kernel.org/stable/c/26a55336be91004dbd438f3b89b0c31617459976 git.kernel.org: https://git.kernel.org/stable/c/a189cae92e97d90a9553740f5558d6f74446d3d1 git.kernel.org: https://git.kernel.org/stable/c/f5e9f3a75efc774f17ab3f33826630d7fe30c7ea git.kernel.org: https://git.kernel.org/stable/c/6d52c1f43ff39ea1ebf8f016e847677f0b60cf2b git.kernel.org: https://git.kernel.org/stable/c/e7dbcb7a561a21e9a8f5b5fa90bb95aefbd0739d git.kernel.org: https://git.kernel.org/stable/c/5e458fa714a55b6b64a9fe0c6d4fa609609f9ec3 git.kernel.org: https://git.kernel.org/stable/c/391f057f44a51cc9418da5cba78b014324174264