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CVE-2026-89726

UnknownEPSS 0.17%

Last modified

CVE-2026-89726 is a vulnerability of currently unknown severity. 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.. EPSS estimates a 0.17% chance of exploitation in the next 30 days.

Description

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.

Metrics

EPSS Probability
0.17%

6.4th percentile

Probability of exploitation in the next 30 days. Learn more

Affected Software

Source: CNA advisory (CVE.org). NVD analysis pending.

VendorProductVersions
LinuxLinux>= 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2, < 04ae68af4107600120c3c41c94268f43bc350d48; >= 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2, < 2e5a70a175f0c74e7238b013a96c4eabc3002934; >= 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2, < 3ada20e110bf3245edb0a3bcddadc33d0f142f8d; >= 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2, < 60c74f42f5abddb85dd919b4448d5474e65dbe76; >= 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2, < 709eb41adaf78d59d4579a13a898125919b69bcc; >= 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2, < 7d658da725ea81c91f73087547b97e7ced82d62b; >= 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2, < 1b0dc3cbb8630f0b5cb34d848628225920a904be; >= 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2, < cec0d03fe785380540dc1b4d07c80f67ae2ffc78
LinuxLinux2.6.12

References

Timeline

Published
Last Modified
Status
Received

Frequently Asked Questions

What is 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: 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.
How severe is CVE-2026-89726?
Severity scoring for CVE-2026-89726 is pending analysis. The EPSS model estimates a 0.17% probability of exploitation in the next 30 days.
How do I fix CVE-2026-89726?
Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

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Source: NVD / NIST