Input: evdev - fix information leak in evdev_pass_values()
Summary
| CVE | CVE-2026-74673 |
|---|
| State | PUBLISHED |
|---|
| Assigner | Linux |
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| Source Priority | CVE Program / NVD first with legacy fallback |
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| Published | 2026-08-22 16:16:41 UTC |
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| Updated | 2026-08-22 16:16:41 UTC |
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| Description | In the Linux kernel, the following vulnerability has been resolved:
Input: evdev - fix information leak in evdev_pass_values()
In evdev_pass_values(), the input_event structure is allocated on the
kernel stack and populated field-by-field. However, it is never fully
initialized. On architectures where struct input_event contains explicit
or implicit padding (such as the 32-bit __pad field on SPARC64), these
padding bytes are left uninitialized.
When this event structure is subsequently passed to the client buffer
and later copied to userspace, the uninitialized padding bytes leak
kernel stack memory, potentially exposing sensitive information.
Similar issues exist in __evdev_queue_syn_dropped and __pass_event.
Fix this by explicitly zeroing the entire event structure with memset()
before populating its fields. This ensures all padding bytes are cleared
before the data crosses the security boundary. |
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Vendor Declared Affected Products
| Source | Vendor | Product | Version | Platforms |
|---|
| CNA |
Linux |
Linux |
affected 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 d2e3839419ac4047835762c4d7712bda1101b57e git |
Not specified |
| CNA |
Linux |
Linux |
affected 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 c6d5fa46c1ee25d068fc730fd377f0f54188d290 git |
Not specified |
| CNA |
Linux |
Linux |
affected 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 e748811d9b80a3e101110ff4b3c612e5fca54d98 git |
Not specified |
| CNA |
Linux |
Linux |
affected 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 06a286b320236508d02ab2ccc9496352748652a8 git |
Not specified |
| CNA |
Linux |
Linux |
affected 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 7d17e9454a9af3ec7aebb88b41a9deedd5b19a6b git |
Not specified |
| CNA |
Linux |
Linux |
affected 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 bd3c4108a56de34380edab670065e86283cb3029 git |
Not specified |
| CNA |
Linux |
Linux |
affected 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 7e55ca1080f09d9f7112c7f20ac31f682c1f2374 git |
Not specified |
| CNA |
Linux |
Linux |
affected 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 90f305f2c7a30257c683e13f4bf7c798eea992a0 git |
Not specified |
| CNA |
Linux |
Linux |
affected 5.10.265 semver |
Not specified |
| CNA |
Linux |
Linux |
affected 5.15.216 semver |
Not specified |
| CNA |
Linux |
Linux |
affected 6.1.183 semver |
Not specified |
| CNA |
Linux |
Linux |
affected 6.6.152 semver |
Not specified |
| CNA |
Linux |
Linux |
affected 6.12.104 semver |
Not specified |
| CNA |
Linux |
Linux |
affected 6.18.45 semver |
Not specified |
| CNA |
Linux |
Linux |
affected 7.1.9 semver |
Not specified |
| CNA |
Linux |
Linux |
unaffected 5.10.265 5.10.* semver |
Not specified |
| CNA |
Linux |
Linux |
unaffected 5.15.216 5.15.* semver |
Not specified |
| CNA |
Linux |
Linux |
unaffected 6.1.183 6.1.* semver |
Not specified |
| CNA |
Linux |
Linux |
unaffected 6.6.152 6.6.* semver |
Not specified |
| CNA |
Linux |
Linux |
unaffected 6.12.104 6.12.* semver |
Not specified |
| CNA |
Linux |
Linux |
unaffected 6.18.45 6.18.* semver |
Not specified |
| CNA |
Linux |
Linux |
unaffected 7.1.9 7.1.* semver |
Not specified |
| CNA |
Linux |
Linux |
unaffected 7.2 * original_commit_for_fix |
Not specified |
References
| Reference | Source | Link | Tags |
|---|
| git.kernel.org/stable/c/06a286b320236508d02ab2ccc9496352748652a8 |
416baaa9-dc9f-4396-8d5f-8c081fb06d67 |
git.kernel.org |
|
| git.kernel.org/stable/c/d2e3839419ac4047835762c4d7712bda1101b57e |
416baaa9-dc9f-4396-8d5f-8c081fb06d67 |
git.kernel.org |
|
| git.kernel.org/stable/c/7e55ca1080f09d9f7112c7f20ac31f682c1f2374 |
416baaa9-dc9f-4396-8d5f-8c081fb06d67 |
git.kernel.org |
|
| git.kernel.org/stable/c/90f305f2c7a30257c683e13f4bf7c798eea992a0 |
416baaa9-dc9f-4396-8d5f-8c081fb06d67 |
git.kernel.org |
|
| git.kernel.org/stable/c/c6d5fa46c1ee25d068fc730fd377f0f54188d290 |
416baaa9-dc9f-4396-8d5f-8c081fb06d67 |
git.kernel.org |
|
| git.kernel.org/stable/c/7d17e9454a9af3ec7aebb88b41a9deedd5b19a6b |
416baaa9-dc9f-4396-8d5f-8c081fb06d67 |
git.kernel.org |
|
| git.kernel.org/stable/c/e748811d9b80a3e101110ff4b3c612e5fca54d98 |
416baaa9-dc9f-4396-8d5f-8c081fb06d67 |
git.kernel.org |
|
| git.kernel.org/stable/c/bd3c4108a56de34380edab670065e86283cb3029 |
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.