Description (CNA)
In the Linux kernel, the following vulnerability has been resolved: lib/ucs2_string.c: fix out-of-bounds read in ucs2_strnlen() Patch series "lib/ucs2_string.c: fix out-of-bounds read in ucs2_strnlen()", v2. This series fixes an off-by-one out-of-bounds read in ucs2_strnlen(). The first patch is the real fix, the second patch comes as a bonus and fixes the code indentation. This patch (of 2): ucs2_strnlen() checks the current character before checking whether the caller-provided maximum length has been reached. If the input is not NUL-terminated within that bound, the loop can read one ucs2_char_t past the limit. Test the length before dereferencing to prevent an off-by-one out-of-bounds read.
Affected (CNA)
| Vendor / product | Versions |
|---|---|
| Linux / Linux | affected 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 before 04ae68af4107600120c3c41c94268f43bc350d48; affected 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 before 2e5a70a175f0c74e7238b013a96c4eabc3002934; affected 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 before 3ada20e110bf3245edb0a3bcddadc33d0f142f8d; affected 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 before 60c74f42f5abddb85dd919b4448d5474e65dbe76; affected 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 before 709eb41adaf78d59d4579a13a898125919b69bcc; affected 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 before 7d658da725ea81c91f73087547b97e7ced82d62b; affected 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 before 1b0dc3cbb8630f0b5cb34d848628225920a904be; affected 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 before cec0d03fe785380540dc1b4d07c80f67ae2ffc78 |
| Linux / Linux | affected 2.6.12; unaffected 0 before 2.6.12; unaffected 5.10.270 through 5.10.*; unaffected 5.15.221 through 5.15.*; unaffected 6.1.188 through 6.1.*; 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/04ae68af4107600120c3c41c94268f43bc350d48
- https://git.kernel.org/stable/c/2e5a70a175f0c74e7238b013a96c4eabc3002934
- https://git.kernel.org/stable/c/3ada20e110bf3245edb0a3bcddadc33d0f142f8d
- https://git.kernel.org/stable/c/60c74f42f5abddb85dd919b4448d5474e65dbe76
- https://git.kernel.org/stable/c/709eb41adaf78d59d4579a13a898125919b69bcc
- https://git.kernel.org/stable/c/7d658da725ea81c91f73087547b97e7ced82d62b
- https://git.kernel.org/stable/c/1b0dc3cbb8630f0b5cb34d848628225920a904be
- https://git.kernel.org/stable/c/cec0d03fe785380540dc1b4d07c80f67ae2ffc78