Description (CNA)
In the Linux kernel, the following vulnerability has been resolved: dm-verity: fix buffer overflow in FEC calculation There's a buffer overflow in dm-verity-fec: if (neras && *neras <= v->fec->roots) fio->erasures[(*neras)++] = i; This allows *neras to reach roots + 1 (the post-increment pushes it past roots). This value is then passed as no_eras to decode_rs8(). Inside the RS decoder (lib/reed_solomon/decode_rs.c:113-121), the erasure locator polynomial loop writes lambda[j] where j can reach nroots + 1 — one element past the end of lambda[] (which is sized nroots + 1, valid indices 0..nroots). The out-of-bounds write lands on syn[0], corrupting the syndrome buffer.
Affected (CNA)
| Vendor / product | Versions |
|---|---|
| Linux / Linux | affected a739ff3f543afbb4a041c16cd0182c8e8d366e70 before 374775626c327aec2425c16b4d36706e5f8718b8; affected a739ff3f543afbb4a041c16cd0182c8e8d366e70 before dc662eed1c432cc2fd4e9314f58d30b3a8cca7cc; affected a739ff3f543afbb4a041c16cd0182c8e8d366e70 before 5488d3a69d205e28f74f18857b853aa12e778e66; affected a739ff3f543afbb4a041c16cd0182c8e8d366e70 before f7990c2b0f08b8841fcd2652d1d7002f5994a7a7; affected a739ff3f543afbb4a041c16cd0182c8e8d366e70 before 31d6e6c0ba8d5a7bd59660035a089307100c5e8e |
| Linux / Linux | affected 4.5; unaffected 0 before 4.5; unaffected 6.6.160 through 6.6.*; unaffected 6.12.114 through 6.12.*; unaffected 6.18.42 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/374775626c327aec2425c16b4d36706e5f8718b8
- https://git.kernel.org/stable/c/dc662eed1c432cc2fd4e9314f58d30b3a8cca7cc
- https://git.kernel.org/stable/c/5488d3a69d205e28f74f18857b853aa12e778e66
- https://git.kernel.org/stable/c/f7990c2b0f08b8841fcd2652d1d7002f5994a7a7
- https://git.kernel.org/stable/c/31d6e6c0ba8d5a7bd59660035a089307100c5e8e
ADP enrichment
No English description supplied.
No references supplied.