fbdev: modedb: fix a possible UAF in fb_find_mode()
Summary
| CVE | CVE-2026-64245 |
|---|
| State | PUBLISHED |
|---|
| Assigner | Linux |
|---|
| Source Priority | CVE Program / NVD first with legacy fallback |
|---|
| Published | 2026-07-24 16:16:53 UTC |
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| Updated | 2026-07-24 16:16:53 UTC |
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| Description | In the Linux kernel, the following vulnerability has been resolved:
fbdev: modedb: fix a possible UAF in fb_find_mode()
If mode_option is NULL, it is assigned from mode_option_buf:
if (!mode_option) {
fb_get_options(NULL, &mode_option_buf);
mode_option = mode_option_buf;
}
Later, name is assigned from mode_option:
const char *name = mode_option;
However, mode_option_buf is freed before name is no longer used:
kfree(mode_option_buf);
while name is still accessed by:
if ((name_matches(db[i], name, namelen) ||
Since name aliases mode_option_buf, this may result in a
use-after-free.
Fix this by extending the lifetime of mode_option_buf until the end of the
function by using scope-based resource management for cleanup. |
|---|
Vendor Declared Affected Products
| Source | Vendor | Product | Version | Platforms |
|---|
| CNA |
Linux |
Linux |
affected 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 c7dc382439f7b019e207055b52e9cec051d42fa9 git |
Not specified |
| CNA |
Linux |
Linux |
affected 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 f906347d75c7fc377041c6d3c535d0f08846aada git |
Not specified |
| CNA |
Linux |
Linux |
affected 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 4d418cf8daf57e454b4d855bf9b2419fd8e6a540 git |
Not specified |
| CNA |
Linux |
Linux |
affected 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 13b6f0cdd5cd5e60f682ec43134ab0e2024bd356 git |
Not specified |
| CNA |
Linux |
Linux |
affected 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 85b6256469cebdac395e7447147e06b2e151014f git |
Not specified |
| CNA |
Linux |
Linux |
affected 6.6.144 semver |
Not specified |
| CNA |
Linux |
Linux |
affected 6.12.95 semver |
Not specified |
| CNA |
Linux |
Linux |
affected 6.18.38 semver |
Not specified |
| CNA |
Linux |
Linux |
affected 7.1.3 semver |
Not specified |
| CNA |
Linux |
Linux |
unaffected 6.6.144 6.6.* semver |
Not specified |
| CNA |
Linux |
Linux |
unaffected 6.12.95 6.12.* semver |
Not specified |
| CNA |
Linux |
Linux |
unaffected 6.18.38 6.18.* semver |
Not specified |
| CNA |
Linux |
Linux |
unaffected 7.1.3 7.1.* semver |
Not specified |
| CNA |
Linux |
Linux |
unaffected 7.2-rc1 * original_commit_for_fix |
Not specified |
References
| Reference | Source | Link | Tags |
|---|
| git.kernel.org/stable/c/4d418cf8daf57e454b4d855bf9b2419fd8e6a540 |
416baaa9-dc9f-4396-8d5f-8c081fb06d67 |
git.kernel.org |
|
| git.kernel.org/stable/c/f906347d75c7fc377041c6d3c535d0f08846aada |
416baaa9-dc9f-4396-8d5f-8c081fb06d67 |
git.kernel.org |
|
| git.kernel.org/stable/c/13b6f0cdd5cd5e60f682ec43134ab0e2024bd356 |
416baaa9-dc9f-4396-8d5f-8c081fb06d67 |
git.kernel.org |
|
| git.kernel.org/stable/c/85b6256469cebdac395e7447147e06b2e151014f |
416baaa9-dc9f-4396-8d5f-8c081fb06d67 |
git.kernel.org |
|
| git.kernel.org/stable/c/c7dc382439f7b019e207055b52e9cec051d42fa9 |
416baaa9-dc9f-4396-8d5f-8c081fb06d67 |
git.kernel.org |
|
| CVE Program record |
CVE.ORG |
www.cve.org |
canonical |
| NVD vulnerability detail |
NVD |
nvd.nist.gov |
canonical, analysis |
No vendor comments have been submitted for this CVE.
There are currently no legacy QID mappings associated with this CVE.