CVE-2026-72098dm-verity: fix buffer overflow in FEC calculation
- 9.8CriticalCVSS base score
- 0.79%Exploitation in 30 daysEPSS · top 43% of all CVEs
- NoKnown exploitednot in CISA's KEV catalog
- NonePublic exploitsnone known yet
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.
Timeline
ID reserved
By Linux
- 6 days later
· 6 days later
Published
- 3 months later
· 3 months later
Record updated
Changes after publication (a new score, a public exploit, EPSS crossing 1, 10 or 50 %, leaving KEV) are kept since November 2026; earlier ones are not known.
Scores
| Scored by | CVSS | Score | Vector |
|---|---|---|---|
| LinuxCNA (assigner) | 3.1 | Critical9.8 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H |
| NVDNVD · Received | 3.1 | Critical9.8 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H |
- EPSS (exploitation in 30 days)
- 0.79% · top 43% of all CVEs (12 Nov 2026)
- CISA SSVC
- Exploitation: none · Automatable: yes · Technical impact: total
The list uses the assigner's score when there is one, then CISA's, then NVD's: Critical 9.8.
Affected products
- affected a739ff3f543afbb4a041c16cd0182c8e8d366e70 – < 84d4d2a6988c9a733f7821452cefb5b0d93de2d1
- affected a739ff3f543afbb4a041c16cd0182c8e8d366e70 – < 374775626c327aec2425c16b4d36706e5f8718b8
- affected a739ff3f543afbb4a041c16cd0182c8e8d366e70 – < dc662eed1c432cc2fd4e9314f58d30b3a8cca7cc
- affected a739ff3f543afbb4a041c16cd0182c8e8d366e70 – < 5488d3a69d205e28f74f18857b853aa12e778e66
- affected a739ff3f543afbb4a041c16cd0182c8e8d366e70 – < f7990c2b0f08b8841fcd2652d1d7002f5994a7a7
- affected a739ff3f543afbb4a041c16cd0182c8e8d366e70 – < 31d6e6c0ba8d5a7bd59660035a089307100c5e8e
- affected 4.5
- unaffected < 4.5
- unaffected 6.1.191 – ≤ 6.1.*
- unaffected 6.6.160 – ≤ 6.6.*
- unaffected 6.12.114 – ≤ 6.12.*
- unaffected 6.18.42 – ≤ 6.18.*
- unaffected 7.1.5 – ≤ 7.1.*
- unaffected 7.2 – ≤ *
References
References6
- https://git.kernel.org/stable/c/84d4d2a6988c9a733f7821452cefb5b0d93de2d1 (opens in a new tab)
- https://git.kernel.org/stable/c/374775626c327aec2425c16b4d36706e5f8718b8 (opens in a new tab)
- https://git.kernel.org/stable/c/dc662eed1c432cc2fd4e9314f58d30b3a8cca7cc (opens in a new tab)
- https://git.kernel.org/stable/c/5488d3a69d205e28f74f18857b853aa12e778e66 (opens in a new tab)
- https://git.kernel.org/stable/c/f7990c2b0f08b8841fcd2652d1d7002f5994a7a7 (opens in a new tab)
- https://git.kernel.org/stable/c/31d6e6c0ba8d5a7bd59660035a089307100c5e8e (opens in a new tab)
Sources
The same CVE in the primary databases and aggregators, to check against.
- CVE.org record (opens in a new tab)
- CVE List JSON (GitHub) (opens in a new tab)
- NVD (opens in a new tab)
- FIRST EPSS (opens in a new tab)
- EUVD EUVD-2026-59056 (opens in a new tab)
- OSV.dev (opens in a new tab)
- GitHub Advisories (opens in a new tab)
- CIRCL Vulnerability-Lookup (opens in a new tab)
Badge for a README or a ticket
[](https://cveledger.app/cve/CVE-2026-72098)Record last updated .