CVE-2026-31664
MEDIUM
MEDIUM
Priority: 0.01
BB Relevance:
36/100
Published: 2026-04-24
Modified: 2026-11-11
First seen: 2026-11-06
Status: active
Attack Surface
Low Complexity
No Interaction
CVSS Vector Breakdown
AV:
Local
AC:
Low
PR:
Low
UI:
None
S:
Unchanged
C:
None
I:
None
A:
High
Description
In the Linux kernel, the following vulnerability has been resolved: xfrm: clear trailing padding in build_polexpire() build_expire() clears the trailing padding bytes of struct xfrm_user_expire after setting the hard field via memset_after(), but the analogous function build_polexpire() does not do this for struct xfrm_user_polexpire. The padding bytes after the __u8 hard field are left uninitialized from the heap allocation, and are then sent to userspace via netlink multicast to XFRMNLGRP_EXPIRE listeners, leaking kernel heap memory contents. Add the missing memset_after() call, matching build_expire().
Affected Software (31)
| Vendor | Product | Version |
|---|---|---|
| Linux | Linux | 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 < a5127501c8d30b5728791b1e340284ca5c9cc4bd |
| Linux | Linux | 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 < e6f4ffe8596947a595c9544e73a73adcb0568b88 |
| Linux | Linux | 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 < ac6985903db047eaff54db929e4bf6b06782788e |
| Linux | Linux | 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 < c221ed63a2769a0af8bd849dfe25740048f34ef4 |
| Linux | Linux | 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 < eda30846ea54f8ed218468e5480c8305ca645e37 |
| Linux | Linux | 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 < b1dfd6b27df35ef4f87825aa5f607378d23ff0f2 |
| Linux | Linux | 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 < e1af65c669ebb1666c54576614c01a7f9ffcfff6 |
| Linux | Linux | 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 < 71a98248c63c535eaa4d4c22f099b68d902006d0 |
| Linux | Linux | 2.6.12 |
| Linux | Linux | 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 < a5127501c8d30b5728791b1e340284ca5c9cc4bd |
| Linux | Linux | 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 < e6f4ffe8596947a595c9544e73a73adcb0568b88 |
| Linux | Linux | 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 < ac6985903db047eaff54db929e4bf6b06782788e |
| Linux | Linux | 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 < c221ed63a2769a0af8bd849dfe25740048f34ef4 |
| Linux | Linux | 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 < eda30846ea54f8ed218468e5480c8305ca645e37 |
| Linux | Linux | 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 < b1dfd6b27df35ef4f87825aa5f607378d23ff0f2 |
| Linux | Linux | 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 < e1af65c669ebb1666c54576614c01a7f9ffcfff6 |
| Linux | Linux | 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 < 71a98248c63c535eaa4d4c22f099b68d902006d0 |
| Linux | Linux | 2.6.12 |
| linux | linux_kernel | 2.6.12.1 – 6.1.169 |
| linux | linux_kernel | 2.6.12 |
| linux | linux_kernel | 2.6.12 |
| linux | linux_kernel | 2.6.12 |
| linux | linux_kernel | 2.6.12 |
| linux | linux_kernel | 2.6.12 |
| linux | linux_kernel | 7.0 |
| linux | linux_kernel | 7.0 |
| linux | linux_kernel | 7.0 |
| linux | linux_kernel | 7.0 |
| linux | linux_kernel | 7.0 |
| linux | linux_kernel | 7.0 |
Showing 30 of 31 entries