Description
In the Linux kernel, the following vulnerability has been resolved: netfilter: nfnetlink_log: fix uninitialized padding leak in NFULA_PAYLOAD __build_packet_message() manually constructs the NFULA_PAYLOAD netlink attribute using skb_put() and skb_copy_bits(), bypassing the standard nla_reserve()/nla_put() helpers. While nla_total_size(data_len) bytes are allocated (including NLA alignment padding), only data_len bytes of actual packet data are copied. The trailing nla_padlen(data_len) bytes (1-3 when data_len is not 4-byte aligned) are never initialized, leaking stale heap contents to userspace via the NFLOG netlink socket. Replace the manual attribute construction with nla_reserve(), which handles the tailroom check, header setup, and padding zeroing via __nla_reserve(). The subsequent skb_copy_bits() fills in the payload data on top of the properly initialized attribute.
Affected products
Version statuses are supplied by the assigning organization. Consult the original record for detailed ranges and platform conditions.
Linux Linux
Default version status: unaffected
df6fb868d6118686805c2fa566e213a8f31c8e4f to < 7f3e5d72455936f42709116fabeca3bb216cda62affecteddf6fb868d6118686805c2fa566e213a8f31c8e4f to < 21d8efda029948d3666b0db5afcc0d36c0984aaeaffecteddf6fb868d6118686805c2fa566e213a8f31c8e4f to < fc961dd7272b5e4a462999635e44a4770d7f2482affecteddf6fb868d6118686805c2fa566e213a8f31c8e4f to < a8365d1064ded323797c5e28e91070c52f44b76caffecteddf6fb868d6118686805c2fa566e213a8f31c8e4f to < a2f6ff3444b663d6cfa63eadd61327a18592885aaffecteddf6fb868d6118686805c2fa566e213a8f31c8e4f to < c9f6c51d36482805ac3ffadb9663fe775a13e926affecteddf6fb868d6118686805c2fa566e213a8f31c8e4f to < 7eff72968161fb8ddb26113344de3b92fb7d7ef5affecteddf6fb868d6118686805c2fa566e213a8f31c8e4f to < 52025ebaa29f4eb4ed8bf92ce83a68f24ab7fdf7affected
Linux Linux
Default version status: affected
2.6.24affected0 to < 2.6.24unaffected5.10.253 to ≤ 5.10.*unaffected5.15.203 to ≤ 5.15.*unaffected6.1.168 to ≤ 6.1.*unaffected6.6.131 to ≤ 6.6.*unaffected6.12.80 to ≤ 6.12.*unaffected6.18.21 to ≤ 6.18.*unaffected6.19.11 to ≤ 6.19.*unaffected7.0 to ≤ *unaffected
References
- https://git.kernel.org/stable/c/7f3e5d72455936f42709116fabeca3bb216cda62 ↗
- https://git.kernel.org/stable/c/21d8efda029948d3666b0db5afcc0d36c0984aae ↗
- https://git.kernel.org/stable/c/fc961dd7272b5e4a462999635e44a4770d7f2482 ↗
- https://git.kernel.org/stable/c/a8365d1064ded323797c5e28e91070c52f44b76c ↗
- https://git.kernel.org/stable/c/a2f6ff3444b663d6cfa63eadd61327a18592885a ↗
- https://git.kernel.org/stable/c/c9f6c51d36482805ac3ffadb9663fe775a13e926 ↗
- https://git.kernel.org/stable/c/7eff72968161fb8ddb26113344de3b92fb7d7ef5 ↗
- https://git.kernel.org/stable/c/52025ebaa29f4eb4ed8bf92ce83a68f24ab7fdf7 ↗
- https://cert-portal.siemens.com/productcert/html/ssa-082556.html ↗
- https://cert-portal.siemens.com/productcert/html/ssa-019113.html ↗
- https://cert-portal.siemens.com/productcert/html/ssa-457936.html ↗