CVE-2026-89726
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…
Impact
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 packages
This record carries no package version data, so it cannot be matched against a dependency list automatically. Read the advisory and compare your version by hand.
References
- NVD record
- CVE.org record
- https://git.kernel.org/stable/c/04ae68af4107600120c3c41c94268f43bc350d48
- https://git.kernel.org/stable/c/1b0dc3cbb8630f0b5cb34d848628225920a904be
- 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/cec0d03fe785380540dc1b4d07c80f67ae2ffc78