CVE-2026-89726
CVE CVE-2026-89726EUVD EUVD-2026-76638Published 2026-09-11T19:46:37.000ZLast changed 2026-09-14T12:02:17.000Z
What the advisory describes
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.
Source: EUVD (ENISA), in the words of the advisory.
Products the advisory names
These come from the advisory itself, not from any check we performed.
- Linux — Linux 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <3ada20e110bf3245edb0a3bcddadc33d0f142f8d; patch: 0; patch: 6.6.157; patch: 7.3-rc1; 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <7d658da725ea81c91f73087547b97e7ced82d62b; 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <04ae68af4107600120c3c41c94268f43bc350d48; patch: 7.2.4; patch: 5.15.221; patch: 6.1.188; patch: 5.10.270; 2.6.12; 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <1b0dc3cbb8630f0b5cb34d848628225920a904be; patch: 6.12.109; 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <cec0d03fe785380540dc1b4d07c80f67ae2ffc78; patch: 6.18.50; 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <709eb41adaf78d59d4579a13a898125919b69bcc; 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <2e5a70a175f0c74e7238b013a96c4eabc3002934; 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <60c74f42f5abddb85dd919b4448d5474e65dbe76
The versions shown are the advisory's own. Patchlage compares no version numbers and derives no judgement from them — which version is installed is something a person has to look up.
Carried in the product catalogue
An estate covering these products can be recorded in Patchlage. An advisory about them appears in the next morning's situation report.
- Linux — Linux
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