evm: terminate and bound the evm_xattrs read buffer
Summary
| CVE | CVE-2026-74399 |
|---|
| State | PUBLISHED |
|---|
| Assigner | Linux |
|---|
| Source Priority | CVE Program / NVD first with legacy fallback |
|---|
| Published | 2026-08-15 06:22:41 UTC |
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| Updated | 2026-08-15 06:22:41 UTC |
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| Description | In the Linux kernel, the following vulnerability has been resolved:
evm: terminate and bound the evm_xattrs read buffer
evm_read_xattrs() allocates size + 1 bytes, fills them from the list of
enabled xattrs, and then passes strlen(temp) to
simple_read_from_buffer(). When no configured xattrs are enabled, the
fill loop stores nothing and temp[0] remains uninitialized, so strlen()
reads beyond initialized memory.
Explicitly terminate the buffer after allocation, use snprintf() for
each formatted line, and pass the accumulated length, without risk of
truncation, to simple_read_from_buffer(). |
|---|
Vendor Declared Affected Products
| Source | Vendor | Product | Version | Platforms |
|---|
| CNA |
Linux |
Linux |
affected fa516b66a1bfce1d72f1620c54bdfebc493000d1 8df81954d22a653a8b01d46692cd56f71137269b git |
Not specified |
| CNA |
Linux |
Linux |
affected fa516b66a1bfce1d72f1620c54bdfebc493000d1 0b9f8282b40af4a99d6243d2cb939d14ff36b049 git |
Not specified |
| CNA |
Linux |
Linux |
affected fa516b66a1bfce1d72f1620c54bdfebc493000d1 a36cbfb85f26e6c6fb6529b1a364331b94dc88f3 git |
Not specified |
| CNA |
Linux |
Linux |
affected fa516b66a1bfce1d72f1620c54bdfebc493000d1 12ad52dc45a0c8c9d25e85b4a84201de4c5420ed git |
Not specified |
| CNA |
Linux |
Linux |
affected fa516b66a1bfce1d72f1620c54bdfebc493000d1 a0f64cf8bfcb39e533d9e27aeb763a8d81b7f39d git |
Not specified |
| CNA |
Linux |
Linux |
affected fa516b66a1bfce1d72f1620c54bdfebc493000d1 38b7d63b23aa9d2ddde7688040e9426d32be4065 git |
Not specified |
| CNA |
Linux |
Linux |
affected fa516b66a1bfce1d72f1620c54bdfebc493000d1 11143a19f5b8dc8f414deab87571134f9f447313 git |
Not specified |
| CNA |
Linux |
Linux |
affected 4.18 |
Not specified |
| CNA |
Linux |
Linux |
unaffected 4.18 semver |
Not specified |
| CNA |
Linux |
Linux |
unaffected 5.15.212 5.15.* semver |
Not specified |
| CNA |
Linux |
Linux |
unaffected 6.1.178 6.1.* semver |
Not specified |
| CNA |
Linux |
Linux |
unaffected 6.6.145 6.6.* semver |
Not specified |
| CNA |
Linux |
Linux |
unaffected 6.12.97 6.12.* semver |
Not specified |
| CNA |
Linux |
Linux |
unaffected 6.18.40 6.18.* semver |
Not specified |
| CNA |
Linux |
Linux |
unaffected 7.1.5 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/11143a19f5b8dc8f414deab87571134f9f447313 |
416baaa9-dc9f-4396-8d5f-8c081fb06d67 |
git.kernel.org |
|
| git.kernel.org/stable/c/0b9f8282b40af4a99d6243d2cb939d14ff36b049 |
416baaa9-dc9f-4396-8d5f-8c081fb06d67 |
git.kernel.org |
|
| git.kernel.org/stable/c/8df81954d22a653a8b01d46692cd56f71137269b |
416baaa9-dc9f-4396-8d5f-8c081fb06d67 |
git.kernel.org |
|
| git.kernel.org/stable/c/a36cbfb85f26e6c6fb6529b1a364331b94dc88f3 |
416baaa9-dc9f-4396-8d5f-8c081fb06d67 |
git.kernel.org |
|
| git.kernel.org/stable/c/12ad52dc45a0c8c9d25e85b4a84201de4c5420ed |
416baaa9-dc9f-4396-8d5f-8c081fb06d67 |
git.kernel.org |
|
| git.kernel.org/stable/c/38b7d63b23aa9d2ddde7688040e9426d32be4065 |
416baaa9-dc9f-4396-8d5f-8c081fb06d67 |
git.kernel.org |
|
| git.kernel.org/stable/c/a0f64cf8bfcb39e533d9e27aeb763a8d81b7f39d |
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.