CVE-2026-64074

CVE CVE-2026-64074EUVD EUVD-2026-45647Published 2026-07-19T15:39:49.000ZLast changed 2026-08-05T12:38:55.000ZCVSS 7.8

What the advisory describes

In the Linux kernel, the following vulnerability has been resolved: fs/statmount: fix slab out-of-bounds write in statmount_mnt_idmap statmount_mnt_idmap() writes one mapping with seq_printf() and then manually advances seq->count to include the NUL separator. If seq_printf() overflows, seq_set_overflow() sets seq->count to seq->size. The manual seq->count++ changes this to seq->size + 1. seq_has_overflowed() then no longer detects the overflow. The corrupted count returns to statmount_string(), which later executes: seq->buf[seq->count++] = '\0'; This causes a 1-byte NULL out-of-bounds write on the dynamically allocated seq buffer. Fix this by checking for overflow immediately after seq_printf().

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 patch: 6.18.34; patch: 0; 37c4a9590e1efcae7749682239fc22a330d2d325 <a3bf0f28d4ba16e1f35f8c983bb04426b87e2a78; patch: 7.1; 6.15; 37c4a9590e1efcae7749682239fc22a330d2d325 <e37ea2c6f17f273813ea4e8e94c102591d598ce1; 37c4a9590e1efcae7749682239fc22a330d2d325 <93614949dc86f068e3c32c32cf1ee2a2323177a7; patch: 7.0.11

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

Patchlage reports hits and suspected hits. About everything else this system says nothing — neither this page nor the situation report ever claims that an estate is safe.