CVE-2026-72098
dm-verity: fix buffer overflow in FEC calculation
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.
INFO
Published Date :
Aug. 15, 2026, 6:21 a.m.
Last Modified :
Aug. 17, 2026, 6:18 a.m.
Remotely Exploit :
Yes !
Source :
416baaa9-dc9f-4396-8d5f-8c081fb06d67
CVSS Scores
| Score | Version | Severity | Vector | Exploitability Score | Impact Score | Source |
|---|---|---|---|---|---|---|
| CVSS 3.1 | CRITICAL | 416baaa9-dc9f-4396-8d5f-8c081fb06d67 |
Solution
- Update the Linux kernel to a version that includes the fix.
- Apply vendor-supplied patches for dm-verity.
- Recompile the kernel if necessary.
References to Advisories, Solutions, and Tools
Here, you will find a curated list of external links that provide in-depth
information, practical solutions, and valuable tools related to
CVE-2026-72098.
CWE - Common Weakness Enumeration
While CVE identifies
specific instances of vulnerabilities, CWE categorizes the common flaws or
weaknesses that can lead to vulnerabilities. CVE-2026-72098 is
associated with the following CWEs:
Common Attack Pattern Enumeration and Classification (CAPEC)
Common Attack Pattern Enumeration and Classification
(CAPEC)
stores attack patterns, which are descriptions of the common attributes and
approaches employed by adversaries to exploit the CVE-2026-72098
weaknesses.
We scan GitHub repositories to detect new proof-of-concept exploits. Following list is a collection of public exploits and proof-of-concepts, which have been published on GitHub (sorted by the most recently updated).
Results are limited to the first 15 repositories due to potential performance issues.
The following list is the news that have been mention
CVE-2026-72098 vulnerability anywhere in the article.
The following table lists the changes that have been made to the
CVE-2026-72098 vulnerability over time.
Vulnerability history details can be useful for understanding the evolution of a vulnerability, and for identifying the most recent changes that may impact the vulnerability's severity, exploitability, or other characteristics.
-
CVE Modified by 416baaa9-dc9f-4396-8d5f-8c081fb06d67
Aug. 17, 2026
Action Type Old Value New Value Added CVSS V3.1 AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H Changed Affected [{'repo': 'https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git', 'vendor': 'Linux', 'product': 'Linux', 'versions': [{'status': 'affected', 'version': 'a739ff3f543afbb4a041c16cd0182c8e8d366e70', 'lessThan': '5488d3a69d205e28f74f18857b853aa12e778e66', 'versionType': 'git'}, {'status': 'affected', 'version': 'a739ff3f543afbb4a041c16cd0182c8e8d366e70', 'lessThan': 'f7990c2b0f08b8841fcd2652d1d7002f5994a7a7', 'versionType': 'git'}, {'status': 'affected', 'version': 'a739ff3f543afbb4a041c16cd0182c8e8d366e70', 'lessThan': '31d6e6c0ba8d5a7bd59660035a089307100c5e8e', 'versionType': 'git'}], 'programFiles': ['drivers/md/dm-verity-fec.c', 'drivers/md/dm-verity-fec.h'], 'defaultStatus': 'unaffected'}, {'repo': 'https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git', 'vendor': 'Linux', 'product': 'Linux', 'versions': [{'status': 'affected', 'version': '4.5'}, {'status': 'unaffected', 'version': '0', 'lessThan': '4.5', 'versionType': 'semver'}, {'status': 'unaffected', 'version': '6.18.42', 'versionType': 'semver', 'lessThanOrEqual': '6.18.*'}, {'status': 'unaffected', 'version': '7.1.5', 'versionType': 'semver', 'lessThanOrEqual': '7.1.*'}, {'status': 'unaffected', 'version': '7.2-rc3', 'versionType': 'original_commit_for_fix', 'lessThanOrEqual': '*'}], 'programFiles': ['drivers/md/dm-verity-fec.c', 'drivers/md/dm-verity-fec.h'], 'defaultStatus': 'affected'}] [{'repo': 'https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git', 'vendor': 'Linux', 'product': 'Linux', 'versions': [{'status': 'affected', 'version': 'a739ff3f543afbb4a041c16cd0182c8e8d366e70', 'lessThan': '5488d3a69d205e28f74f18857b853aa12e778e66', 'versionType': 'git'}, {'status': 'affected', 'version': 'a739ff3f543afbb4a041c16cd0182c8e8d366e70', 'lessThan': 'f7990c2b0f08b8841fcd2652d1d7002f5994a7a7', 'versionType': 'git'}, {'status': 'affected', 'version': 'a739ff3f543afbb4a041c16cd0182c8e8d366e70', 'lessThan': '31d6e6c0ba8d5a7bd59660035a089307100c5e8e', 'versionType': 'git'}], 'programFiles': ['drivers/md/dm-verity-fec.c', 'drivers/md/dm-verity-fec.h'], 'defaultStatus': 'unaffected'}, {'repo': 'https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git', 'vendor': 'Linux', 'product': 'Linux', 'versions': [{'status': 'affected', 'version': '4.5'}, {'status': 'unaffected', 'version': '0', 'lessThan': '4.5', 'versionType': 'semver'}, {'status': 'unaffected', 'version': '6.18.42', 'versionType': 'semver', 'lessThanOrEqual': '6.18.*'}, {'status': 'unaffected', 'version': '7.1.5', 'versionType': 'semver', 'lessThanOrEqual': '7.1.*'}, {'status': 'unaffected', 'version': '7.2', 'versionType': 'original_commit_for_fix', 'lessThanOrEqual': '*'}], 'programFiles': ['drivers/md/dm-verity-fec.c', 'drivers/md/dm-verity-fec.h'], 'defaultStatus': 'affected'}] -
New CVE Received by 416baaa9-dc9f-4396-8d5f-8c081fb06d67
Aug. 15, 2026
Action Type Old Value New Value Added Affected [{'repo': 'https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git', 'vendor': 'Linux', 'product': 'Linux', 'versions': [{'status': 'affected', 'version': 'a739ff3f543afbb4a041c16cd0182c8e8d366e70', 'lessThan': '5488d3a69d205e28f74f18857b853aa12e778e66', 'versionType': 'git'}, {'status': 'affected', 'version': 'a739ff3f543afbb4a041c16cd0182c8e8d366e70', 'lessThan': 'f7990c2b0f08b8841fcd2652d1d7002f5994a7a7', 'versionType': 'git'}, {'status': 'affected', 'version': 'a739ff3f543afbb4a041c16cd0182c8e8d366e70', 'lessThan': '31d6e6c0ba8d5a7bd59660035a089307100c5e8e', 'versionType': 'git'}], 'programFiles': ['drivers/md/dm-verity-fec.c', 'drivers/md/dm-verity-fec.h'], 'defaultStatus': 'unaffected'}, {'repo': 'https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git', 'vendor': 'Linux', 'product': 'Linux', 'versions': [{'status': 'affected', 'version': '4.5'}, {'status': 'unaffected', 'version': '0', 'lessThan': '4.5', 'versionType': 'semver'}, {'status': 'unaffected', 'version': '6.18.42', 'versionType': 'semver', 'lessThanOrEqual': '6.18.*'}, {'status': 'unaffected', 'version': '7.1.5', 'versionType': 'semver', 'lessThanOrEqual': '7.1.*'}, {'status': 'unaffected', 'version': '7.2-rc3', 'versionType': 'original_commit_for_fix', 'lessThanOrEqual': '*'}], 'programFiles': ['drivers/md/dm-verity-fec.c', 'drivers/md/dm-verity-fec.h'], 'defaultStatus': 'affected'}] Added 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. Added Reference https://git.kernel.org/stable/c/31d6e6c0ba8d5a7bd59660035a089307100c5e8e Added Reference https://git.kernel.org/stable/c/5488d3a69d205e28f74f18857b853aa12e778e66 Added Reference https://git.kernel.org/stable/c/f7990c2b0f08b8841fcd2652d1d7002f5994a7a7