CVE-2026-31428
CVE.org · Published
- Record status
- Published
- Identifier year (not publication year)
- 2026
- Source publication
- Source updated
- Imported by cveboard
- Source snapshot
- cve_2026-10-24_midnight_baseline ·
CNA source text (English)
netfilter: nfnetlink_log: fix uninitialized padding leak in NFULA_PAYLOAD
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.
Scoped product and version facts
Fix information unknown; no fixed version is derived here. Missing information does not prove that no fix exists.
Exploitation unknown; this catalogue does not assess exploitation.
Linux
- Vendor
- Linux
- Product
- Linux
- Platforms
- Unknown
- Default status
unaffected
| Version (version) | Status (status) | Version scheme (versionType) | Exclusive end (lessThan) | Inclusive end (lessThanOrEqual) | Status changes (at → status) |
|---|---|---|---|---|---|
| df6fb868d6118686805c2fa566e213a8f31c8e4f | affected | git | 7f3e5d72455936f42709116fabeca3bb216cda62 | Unavailable | None listed |
| df6fb868d6118686805c2fa566e213a8f31c8e4f | affected | git | 21d8efda029948d3666b0db5afcc0d36c0984aae | Unavailable | None listed |
| df6fb868d6118686805c2fa566e213a8f31c8e4f | affected | git | fc961dd7272b5e4a462999635e44a4770d7f2482 | Unavailable | None listed |
| df6fb868d6118686805c2fa566e213a8f31c8e4f | affected | git | a8365d1064ded323797c5e28e91070c52f44b76c | Unavailable | None listed |
| df6fb868d6118686805c2fa566e213a8f31c8e4f | affected | git | a2f6ff3444b663d6cfa63eadd61327a18592885a | Unavailable | None listed |
| df6fb868d6118686805c2fa566e213a8f31c8e4f | affected | git | c9f6c51d36482805ac3ffadb9663fe775a13e926 | Unavailable | None listed |
| df6fb868d6118686805c2fa566e213a8f31c8e4f | affected | git | 7eff72968161fb8ddb26113344de3b92fb7d7ef5 | Unavailable | None listed |
| df6fb868d6118686805c2fa566e213a8f31c8e4f | affected | git | 52025ebaa29f4eb4ed8bf92ce83a68f24ab7fdf7 | Unavailable | None listed |
Linux
- Vendor
- Linux
- Product
- Linux
- Platforms
- Unknown
- Default status
affected
| Version (version) | Status (status) | Version scheme (versionType) | Exclusive end (lessThan) | Inclusive end (lessThanOrEqual) | Status changes (at → status) |
|---|---|---|---|---|---|
| 2.6.24 | affected | Unavailable | Unavailable | Unavailable | None listed |
| 0 | unaffected | semver | 2.6.24 | Unavailable | None listed |
| 5.10.253 | unaffected | semver | Unavailable | 5.10.* | None listed |
| 5.15.203 | unaffected | semver | Unavailable | 5.15.* | None listed |
| 6.1.168 | unaffected | semver | Unavailable | 6.1.* | None listed |
| 6.6.131 | unaffected | semver | Unavailable | 6.6.* | None listed |
| 6.12.80 | unaffected | semver | Unavailable | 6.12.* | None listed |
| 6.18.21 | unaffected | semver | Unavailable | 6.18.* | None listed |
| 6.19.11 | unaffected | semver | Unavailable | 6.19.* | None listed |
| 7.0 | unaffected | original_commit_for_fix | Unavailable | * | None listed |