CVE-2026-89719zram: fix out-of-bounds access in read_block_state()
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 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.
- CVSS
- Not yet scored
- Weakness (CWE)
- Not given
- 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
- Received
- Record last updated
- Sep 21, 2026
- First seen by InfoSec Signals
- Oct 9, 2026
Affected products
Linux Linux linux:linux (from the name) | from c0265342bff4fcaa2cdf13f4596244c18d4a7ae5 before 6d52c1f43ff39ea1ebf8f016e847677f0b60cf2b; from c0265342bff4fcaa2cdf13f4596244c18d4a7ae5 before e7dbcb7a561a21e9a8f5b5fa90bb95aefbd0739d; from c0265342bff4fcaa2cdf13f4596244c18d4a7ae5 before 5e458fa714a55b6b64a9fe0c6d4fa609609f9ec3; from c0265342bff4fcaa2cdf13f4596244c18d4a7ae5 before 391f057f44a51cc9418da5cba78b014324174264 | CNA record |
References
- 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
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.