CVE-2026-89726Medium· 5.5▾ SunlitIn 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-b…
▾ Sunlit zone — Low / medium · no exploitation signal
impact 30.3 · likelihood 0 · exploitation 0
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Exploit-prediction probability, daily snapshots since Sep 12.
Disclosure to exploitation, from the record and what we observed since indexing it.
Disclosed via CVEORG
0.2%
— → 5.3
none → medium
— → 5.3
none → medium
0.2% → 0.2%
— → 5.3
none → medium
5.3 → 5.5
Last analysed / modified upstream
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.
Linux >= 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 < 04ae68af4107600120c3c41c94268f43bc350d48Linux >= 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 < 2e5a70a175f0c74e7238b013a96c4eabc3002934Linux >= 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 < 3ada20e110bf3245edb0a3bcddadc33d0f142f8dLinux >= 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 < 60c74f42f5abddb85dd919b4448d5474e65dbe76Linux >= 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 < 709eb41adaf78d59d4579a13a898125919b69bccLinux >= 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 < 7d658da725ea81c91f73087547b97e7ced82d62bLinux >= 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 < 1b0dc3cbb8630f0b5cb34d848628225920a904beLinux >= 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 < cec0d03fe785380540dc1b4d07c80f67ae2ffc78Linux 2.6.12Refer to the linked advisories for vendor-supplied fixes and affected version ranges.
Field changes observed since this record was first indexed.
Connected by shared product, vendor, weakness, or advisory.
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