x86/CPU: Fix FPDSS on Zen1
Summary
| CVE | CVE-2026-31628 |
|---|
| State | PUBLISHED |
|---|
| Assigner | Linux |
|---|
| Source Priority | CVE Program / NVD first with legacy fallback |
|---|
| Published | 2026-04-24 15:16:42 UTC |
|---|
| Updated | 2026-04-24 17:51:40 UTC |
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| Description | In the Linux kernel, the following vulnerability has been resolved:
x86/CPU: Fix FPDSS on Zen1
Zen1's hardware divider can leave, under certain circumstances, partial
results from previous operations. Those results can be leaked by
another, attacker thread.
Fix that with a chicken bit. |
|---|
Vendor Declared Affected Products
| Source | Vendor | Product | Version | Platforms |
|---|
| CNA |
Linux |
Linux |
affected 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 ed7a3a246309ccc807238f1b4f159ee6d37ff9c4 git |
Not specified |
| CNA |
Linux |
Linux |
affected 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 0548529af20e68c6552817834b766646dd3bd7a7 git |
Not specified |
| CNA |
Linux |
Linux |
affected 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 1272cfedf4cd1019ddf583917a99b62f2d3645bb git |
Not specified |
| CNA |
Linux |
Linux |
affected 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 91f02726b2203b71545713ecb7fb006e60a2d66f git |
Not specified |
| CNA |
Linux |
Linux |
affected 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 b731aca06387b195058a9f6449a03b62efa1bd10 git |
Not specified |
| CNA |
Linux |
Linux |
affected 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 ad17f07e95e6e8505e2153e5b391f0d27eacce25 git |
Not specified |
| CNA |
Linux |
Linux |
affected 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 e6af5286efe5a56128b34032572c9ce9ebeccda3 git |
Not specified |
| CNA |
Linux |
Linux |
affected 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 546785c719418c6166834a47e372a88f5f7ae893 git |
Not specified |
| CNA |
Linux |
Linux |
unaffected 5.10.253 5.10.* semver |
Not specified |
| CNA |
Linux |
Linux |
unaffected 5.15.203 5.15.* semver |
Not specified |
| CNA |
Linux |
Linux |
unaffected 6.1.169 6.1.* semver |
Not specified |
| CNA |
Linux |
Linux |
unaffected 6.6.135 6.6.* semver |
Not specified |
| CNA |
Linux |
Linux |
unaffected 6.12.82 6.12.* semver |
Not specified |
| CNA |
Linux |
Linux |
unaffected 6.18.23 6.18.* semver |
Not specified |
| CNA |
Linux |
Linux |
unaffected 6.19.13 6.19.* semver |
Not specified |
| CNA |
Linux |
Linux |
unaffected 7.0.1 7.0.* semver |
Not specified |
References
| Reference | Source | Link | Tags |
|---|
| git.kernel.org/stable/c/ad17f07e95e6e8505e2153e5b391f0d27eacce25 |
416baaa9-dc9f-4396-8d5f-8c081fb06d67 |
git.kernel.org |
|
| git.kernel.org/stable/c/0548529af20e68c6552817834b766646dd3bd7a7 |
416baaa9-dc9f-4396-8d5f-8c081fb06d67 |
git.kernel.org |
|
| git.kernel.org/stable/c/1272cfedf4cd1019ddf583917a99b62f2d3645bb |
416baaa9-dc9f-4396-8d5f-8c081fb06d67 |
git.kernel.org |
|
| git.kernel.org/stable/c/546785c719418c6166834a47e372a88f5f7ae893 |
416baaa9-dc9f-4396-8d5f-8c081fb06d67 |
git.kernel.org |
|
| git.kernel.org/stable/c/ed7a3a246309ccc807238f1b4f159ee6d37ff9c4 |
416baaa9-dc9f-4396-8d5f-8c081fb06d67 |
git.kernel.org |
|
| git.kernel.org/stable/c/91f02726b2203b71545713ecb7fb006e60a2d66f |
416baaa9-dc9f-4396-8d5f-8c081fb06d67 |
git.kernel.org |
|
| git.kernel.org/stable/c/e6af5286efe5a56128b34032572c9ce9ebeccda3 |
416baaa9-dc9f-4396-8d5f-8c081fb06d67 |
git.kernel.org |
|
| git.kernel.org/stable/c/b731aca06387b195058a9f6449a03b62efa1bd10 |
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.
