Description (CNA)
In the Linux kernel, the following vulnerability has been resolved: nvme-multipath: fix underflow in ANA log bounds checks The number of ANA groups advertised through Identify Controller sizes the ANA log buffer. The ANA log header and group descriptors independently supply the number of groups and namespace IDs to parse. Both bounds checks subtract an untrusted object size from ana_log_size before comparing the current offset. If the object is larger than the buffer, the size_t subtraction underflows and lets the parser read beyond ana_log_buf. Check the current offset before the first subtraction and compare each object size with the remaining buffer instead. This rejects inconsistent ANA data before dereferencing a truncated group descriptor or walking an oversized namespace ID array.
Affected (CNA)
| Vendor / product | Versions |
|---|---|
| Linux / Linux | affected 0d0b660f214dc4905db7b6bc998bad0c16dfb1ba before 3045128294d347fd38542ad6e174b1b34d9c0751; affected 0d0b660f214dc4905db7b6bc998bad0c16dfb1ba before 03a0c21f0fd7a872953aae5714303d8f38d1e567; affected 0d0b660f214dc4905db7b6bc998bad0c16dfb1ba before 49e8a3224c91fd5fbf22f4adcca6c8209cfdd6fe; affected 0d0b660f214dc4905db7b6bc998bad0c16dfb1ba before e5cdb0c0a51e8ff49914ae16ef5360010c40cc85; affected 0d0b660f214dc4905db7b6bc998bad0c16dfb1ba before 63fa2d9c9c37020bd2703fe2a6a38027b5abeb15 |
| Linux / Linux | affected 4.19; unaffected 0 before 4.19; unaffected 6.6.160 through 6.6.*; unaffected 6.12.113 through 6.12.*; unaffected 6.18.56 through 6.18.*; unaffected 7.2.10 through 7.2.*; unaffected 7.3 through * |
CWE
No CWE identifiers supplied.
References
- https://git.kernel.org/stable/c/3045128294d347fd38542ad6e174b1b34d9c0751
- https://git.kernel.org/stable/c/03a0c21f0fd7a872953aae5714303d8f38d1e567
- https://git.kernel.org/stable/c/49e8a3224c91fd5fbf22f4adcca6c8209cfdd6fe
- https://git.kernel.org/stable/c/e5cdb0c0a51e8ff49914ae16ef5360010c40cc85
- https://git.kernel.org/stable/c/63fa2d9c9c37020bd2703fe2a6a38027b5abeb15