Description (CNA)
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.
Affected (CNA)
| Vendor / product | Versions |
|---|---|
| Linux / Linux | affected c0265342bff4fcaa2cdf13f4596244c18d4a7ae5 before f5e9f3a75efc774f17ab3f33826630d7fe30c7ea; affected c0265342bff4fcaa2cdf13f4596244c18d4a7ae5 before 6d52c1f43ff39ea1ebf8f016e847677f0b60cf2b; affected c0265342bff4fcaa2cdf13f4596244c18d4a7ae5 before e7dbcb7a561a21e9a8f5b5fa90bb95aefbd0739d; affected c0265342bff4fcaa2cdf13f4596244c18d4a7ae5 before 5e458fa714a55b6b64a9fe0c6d4fa609609f9ec3; affected c0265342bff4fcaa2cdf13f4596244c18d4a7ae5 before 391f057f44a51cc9418da5cba78b014324174264 |
| Linux / Linux | affected 4.18; unaffected 0 before 4.18; unaffected 6.6.160 through 6.6.*; unaffected 6.12.111 through 6.12.*; unaffected 6.18.51 through 6.18.*; unaffected 7.2.4 through 7.2.*; unaffected 7.3 through * |
CWE
No CWE identifiers supplied.
References
- 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