Description (CNA)
In the Linux kernel, the following vulnerability has been resolved: platform/x86: hp-bioscfg: fix off-by-one write in hp_get_string_from_buffer() hp_get_string_from_buffer() clamps the converted string length against the destination buffer size with "size > dst_size", so when the converted length is exactly equal to dst_size, conv_dst_size is left at dst_size and the unconditional NUL terminator write dst[conv_dst_size] = 0; lands one byte past the destination buffer. This is the same shape of bug as the previously fixed off-by-one in hp_convert_hexstr_to_str(): the buffer is sized correctly for the content, but the terminator write is never checked against that size. Fix by changing the comparison to ">=" so conv_dst_size is always left with room for the terminator. All fixed-size destinations that reach this function (path[512], current_value[512], current_password/current_value[64], and the per-entry buffers in encodings[][512] and prerequisites[][512]) are affected.
Affected (CNA)
| Vendor / product | Versions |
|---|---|
| Linux / Linux | affected a34fc329b1895fc8a6eb12099adc47009421ba6a before 8f5aa1506cdddea6b33584c2445b9ce99eeddb64; affected a34fc329b1895fc8a6eb12099adc47009421ba6a before 3cc772d0154799961f032e5a992d4a50523e291a; affected a34fc329b1895fc8a6eb12099adc47009421ba6a before b15b334fbc3c0c46440f8a892ebf62164fca23d6; affected a34fc329b1895fc8a6eb12099adc47009421ba6a before ddf98cf33529714b3ba1a158afb1db5b0f759a1a; affected a34fc329b1895fc8a6eb12099adc47009421ba6a before dc03f05e419f3460342fb7564884f244622634b6 |
| Linux / Linux | affected 6.6; unaffected 0 before 6.6; unaffected 6.6.157 through 6.6.*; unaffected 6.12.109 through 6.12.*; unaffected 6.18.50 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/8f5aa1506cdddea6b33584c2445b9ce99eeddb64
- https://git.kernel.org/stable/c/3cc772d0154799961f032e5a992d4a50523e291a
- https://git.kernel.org/stable/c/b15b334fbc3c0c46440f8a892ebf62164fca23d6
- https://git.kernel.org/stable/c/ddf98cf33529714b3ba1a158afb1db5b0f759a1a
- https://git.kernel.org/stable/c/dc03f05e419f3460342fb7564884f244622634b6