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().
Product status
1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 (git) before ac6985903db047eaff54db929e4bf6b06782788e
1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 (git) before c221ed63a2769a0af8bd849dfe25740048f34ef4
1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 (git) before eda30846ea54f8ed218468e5480c8305ca645e37
1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 (git) before b1dfd6b27df35ef4f87825aa5f607378d23ff0f2
1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 (git) before e1af65c669ebb1666c54576614c01a7f9ffcfff6
1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 (git) before 71a98248c63c535eaa4d4c22f099b68d902006d0
2.6.12
Any version before 2.6.12
6.1.169 (semver)
6.6.135 (semver)
6.12.82 (semver)
6.18.23 (semver)
6.19.13 (semver)
7.0 (original_commit_for_fix)
References
git.kernel.org/...c/ac6985903db047eaff54db929e4bf6b06782788e
git.kernel.org/...c/c221ed63a2769a0af8bd849dfe25740048f34ef4
git.kernel.org/...c/eda30846ea54f8ed218468e5480c8305ca645e37
git.kernel.org/...c/b1dfd6b27df35ef4f87825aa5f607378d23ff0f2
git.kernel.org/...c/e1af65c669ebb1666c54576614c01a7f9ffcfff6
git.kernel.org/...c/71a98248c63c535eaa4d4c22f099b68d902006d0