CVE-2026-72098
dm-verity: fix buffer overflow in FEC calculation
CRITICAL 9.8
At a glance
- Source
- NVD
- EPSS
- EPSS 0.69 % · percentile 53 ()
- State
- PUBLISHED
- Published
- Updated
- Assigner
- Linux
- NVD status
- Received
Description
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.
Weaknesses (CWE)
- CWE-787 — Out-of-bounds Write
References
- https://git.kernel.org/stable/c/374775626c327aec2425c16b4d36706e5f8718b8
- https://git.kernel.org/stable/c/dc662eed1c432cc2fd4e9314f58d30b3a8cca7cc
- https://git.kernel.org/stable/c/5488d3a69d205e28f74f18857b853aa12e778e66
- https://git.kernel.org/stable/c/f7990c2b0f08b8841fcd2652d1d7002f5994a7a7
- https://git.kernel.org/stable/c/31d6e6c0ba8d5a7bd59660035a089307100c5e8e
Scores
| Version | Score | Vector | Scored by |
|---|---|---|---|
| CVSS 3.1 | CRITICAL 9.8 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H | Linux |
| CVSS 3.1 | CRITICAL 9.8 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H | NVD · 416baaa9-dc9f-4396-8d5f-8c081fb06d67 (Secondary) |
European references
- ENISA EUVD · EUVD-2026-59056
- GCVE · GCVE-0-2026-72098
CERT-FR advisories
- CERTFR-2026-AVI-1372 — Multiples vulnérabilités dans les produits SUSE · cert.ssi.gouv.fr
- CERTFR-2026-AVI-1336 — Multiples vulnérabilités dans les produits IBM · cert.ssi.gouv.fr
- CERTFR-2026-AVI-1335 — Multiples vulnérabilités dans le noyau Linux de SUSE · cert.ssi.gouv.fr
- CERTFR-2026-AVI-1287 — Multiples vulnérabilités dans le noyau Linux de Red Hat · cert.ssi.gouv.fr
- CERTFR-2026-AVI-1286 — Multiples vulnérabilités dans le noyau Linux d'Ubuntu · cert.ssi.gouv.fr
- CERTFR-2026-AVI-1254 — Multiples vulnérabilités dans le noyau Linux de Red Hat · cert.ssi.gouv.fr
- CERTFR-2026-AVI-1252 — Multiples vulnérabilités dans le noyau Linux d'Ubuntu · cert.ssi.gouv.fr
- CERTFR-2026-AVI-1229 — Multiples vulnérabilités dans le noyau Linux d'Ubuntu · cert.ssi.gouv.fr
- CERTFR-2026-AVI-1204 — Multiples vulnérabilités dans le noyau Linux de Red Hat · cert.ssi.gouv.fr
- CERTFR-2026-AVI-1203 — Multiples vulnérabilités dans le noyau Linux d'Ubuntu · cert.ssi.gouv.fr
Affected products
| Product | Versions |
|---|---|
| Linux · Linux | affected a739ff3f543afbb4a041c16cd0182c8e8d366e70 < 374775626c327aec2425c16b4d36706e5f8718b8 ; affected a739ff3f543afbb4a041c16cd0182c8e8d366e70 < dc662eed1c432cc2fd4e9314f58d30b3a8cca7cc ; affected a739ff3f543afbb4a041c16cd0182c8e8d366e70 < 5488d3a69d205e28f74f18857b853aa12e778e66 ; affected a739ff3f543afbb4a041c16cd0182c8e8d366e70 < f7990c2b0f08b8841fcd2652d1d7002f5994a7a7 ; affected a739ff3f543afbb4a041c16cd0182c8e8d366e70 < 31d6e6c0ba8d5a7bd59660035a089307100c5e8e |
| Linux · Linux | affected 4.5 ; unaffected 0 < 4.5 ; unaffected 6.6.160 ≤ 6.6.* ; unaffected 6.12.114 ≤ 6.12.* ; unaffected 6.18.42 ≤ 6.18.* ; unaffected 7.1.5 ≤ 7.1.* |
Sources
| Source | Licence |
|---|---|
| CVE List (CVEProject cvelistV5) | CVE Program Terms of Use |
| EPSS (FIRST.org) | FIRST — attribution requested |
| ENISA EUVD | ENISA — reproduction authorised, source acknowledged |
| CERT-FR (ANSSI) | Licence Ouverte / Etalab 2.0 |
| NVD (NIST) via fkie-cad/nvd-json-data-feeds | Public domain — this product uses data from the NVD API but is not endorsed or certified by the NVD |