Description (CNA)
In the Linux kernel, the following vulnerability has been resolved: dm-log: fix a bitset_size overflow on 32bit machines Commit c20e36b7631d ("dm log: fix out-of-bounds write due to region_count overflow") made sure that region_count could fit in an unsigned int. But the bitmap memory isn't allocated based on region_count. It uses bitset_size (a size_t variable). The first step of calculating bitset_size is to set it to region_count, rounded up to a multiple of BITS_PER_LONG. If region_size is less than BITS_PER_LONG smaller than UINT_MAX, it will get rounded up to 2^32. On a 32bit architecture, this will make bitset_size wrap around to 0 and fail, despite region_count being valid. Since bitset_size gets divided by 8, it can hold any valid region_count. It just needs a special case to handle the rollover. If it is 0, the value rolled over, and bitset size should be set to the number of bytes needed to hold 2^32 bits.
Affected (CNA)
| Vendor / product | Versions |
|---|---|
| Linux / Linux | affected 44ab8875ae4a2842bde2d756bed195d375e0debb before cdc4ddf9db2cb79f4ab86b1a509b7ac21b0b6cf5; affected defe483e47173768c227532694dc78cb65db5f09 before 4b0de5a3ac1fd42acb0dc1f80ac5747e3287d723; affected 3ec74da927b4e171a6fc0e77b1188ba4d019af51 before 567602fa72d57169365cbc589e0b8c3be900636d; affected d4ac87567f86a55c3c92e9a5144dcd943a9772a1 before d05e0edfecf5260e6dddd28b2f0cce02bfc6ed7a; affected 12bd5b88e91a02785244ff1d20fb157e96e9cdc8 before 1c3412b584e1fb6c665ff33ba7259253bc0082cb; affected b455903eed4558982be0811f5b7f44f6bbc4ff57 before e0b0163a65758ec3a2361ae1cea407898c27f21e; affected c20e36b7631d83e7535877f08af8b0af72c44b1a before 79feb87ab2396d49b9b65e4bb815d33cc71cba47; affected c20e36b7631d83e7535877f08af8b0af72c44b1a before 9743132a41f4d9d0e54c5f2adcb821b04796bab1; affected 4ec8323b9f0764a14d532b1ae9b87f8a9fecb867; affected 5.10.258 before 5.10.261; affected 5.15.209 before 5.15.212; affected 6.1.175 before 6.1.178; affected 6.6.141 before 6.6.145; affected 6.12.91 before 6.12.97; affected 6.18.33 before 6.18.40; affected 7.0.10 before 7.1 |
| Linux / Linux | affected 7.1; unaffected 0 before 7.1; unaffected 5.10.261 through 5.10.*; unaffected 5.15.212 through 5.15.*; unaffected 6.1.178 through 6.1.*; unaffected 6.6.145 through 6.6.*; unaffected 6.12.97 through 6.12.*; unaffected 6.18.40 through 6.18.*; unaffected 7.1.5 through 7.1.*; unaffected 7.2 through * |
CWE
No CWE identifiers supplied.
References
- https://git.kernel.org/stable/c/cdc4ddf9db2cb79f4ab86b1a509b7ac21b0b6cf5
- https://git.kernel.org/stable/c/4b0de5a3ac1fd42acb0dc1f80ac5747e3287d723
- https://git.kernel.org/stable/c/567602fa72d57169365cbc589e0b8c3be900636d
- https://git.kernel.org/stable/c/d05e0edfecf5260e6dddd28b2f0cce02bfc6ed7a
- https://git.kernel.org/stable/c/1c3412b584e1fb6c665ff33ba7259253bc0082cb
- https://git.kernel.org/stable/c/e0b0163a65758ec3a2361ae1cea407898c27f21e
- https://git.kernel.org/stable/c/79feb87ab2396d49b9b65e4bb815d33cc71cba47
- https://git.kernel.org/stable/c/9743132a41f4d9d0e54c5f2adcb821b04796bab1
ADP enrichment
No English description supplied.
No references supplied.