In the Linux kernel, the following vulnerability has been resolved: dm-verity: fix buffer overflow in FEC calculation There's a buffer overflow in dm-verity-fec: if (neras && *neras <= v->fec->roots) fio->erasures[(*neras)++] = i; This allows *neras to reach roots + 1 (the post-increment pushes it past roots). This value is then passed as no_eras to decode_rs8(). Inside the RS decoder (lib/reed_solomon/decode_rs.c:113-121), the erasure locator polynomial loop writes lambda[j] where j can reach nroots + 1 — one element past the end of lambda[] (which is sized nroots + 1, valid indices 0..nroots). The out-of-bounds write lands on syn[0], corrupting the syndrome buffer.

A flaw was found in the dm-verity component of the Linux kernel. A buffer overflow occurs during Forward Error Correction (FEC) calculation, allowing an attacker to write past the end of an allocated buffer. This out-of-bounds write can corrupt the syndrome buffer, potentially leading to system instability or other undefined behavior.

Mitigation for this issue is either not available or the currently available options do not meet the Red Hat Product Security criteria comprising ease of use and deployment, applicability to widespread installation base, or stability. Red Hat Enterprise Linux 10 2026-09-08T00:00:00Z RHSA-2026:65334 kernel-0:6.12.0-211.53.1.el10_2 Red Hat Enterprise Linux 8 2026-09-15T00:00:00Z RHSA-2026:67469 kernel-rt-0:4.18.0-553.163.1.rt7.504.el8_10 Red Hat Enterprise Linux 8 2026-09-15T00:00:00Z RHSA-2026:67468 kernel-0:4.18.0-553.163.1.el8_10 Red Hat Enterprise Linux 9 2026-09-14T00:00:00Z RHSA-2026:67150 kernel-0:5.14.0-687.47.1.el9_8 Red Hat Enterprise Linux 9 2026-09-14T00:00:00Z RHSA-2026:67150 kernel-0:5.14.0-687.47.1.el9_8 Red Hat Enterprise Linux 6 Not affected kernel Red Hat Enterprise Linux 7 Not affected kernel Red Hat Enterprise Linux 7 Not affected kernel-rt Red Hat Enterprise Linux 9 Affected kernel-rt https://www.cve.org/CVERecord?id=CVE-2026-72098 https://nvd.nist.gov/vuln/detail/CVE-2026-72098 https://lore.kernel.org/linux-cve-announce/2026081524-CVE-2026-72098-cbda@gregkh/T