Vulnerability-Lookup

FKIE_CVE-2026-31428

Vulnerability from fkie_nvd - Published: 2026-04-13 14:16 - Updated: 2026-05-20 19:24

Severity

5.5 (Medium) - CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

Summary

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.

References

URL	Tags
416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/21d8efda029948d3666b0db5afcc0d36c0984aae	Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/52025ebaa29f4eb4ed8bf92ce83a68f24ab7fdf7	Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/7eff72968161fb8ddb26113344de3b92fb7d7ef5	Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/7f3e5d72455936f42709116fabeca3bb216cda62	Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/a2f6ff3444b663d6cfa63eadd61327a18592885a	Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/a8365d1064ded323797c5e28e91070c52f44b76c	Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/c9f6c51d36482805ac3ffadb9663fe775a13e926	Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/fc961dd7272b5e4a462999635e44a4770d7f2482	Patch

Impacted products

Vendor	Product	Version
linux	linux_kernel	*
linux	linux_kernel	*
linux	linux_kernel	*
linux	linux_kernel	*
linux	linux_kernel	*
linux	linux_kernel	*
linux	linux_kernel	*
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

JSON

To clipboard

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CVE-2026-31428 (GCVE-0-2026-31428)

Vulnerability from cvelistv5 – Published: 2026-04-13 13:40 – Updated: 2026-05-11 22:08

Title

netfilter: nfnetlink_log: fix uninitialized padding leak in NFULA_PAYLOAD

Summary

Severity

No CVSS data available.

Assigner

Linux

References

8 references

URL	Tags
https://git.kernel.org/stable/c/7f3e5d72455936f42…
https://git.kernel.org/stable/c/21d8efda029948d36…
https://git.kernel.org/stable/c/fc961dd7272b5e4a4…
https://git.kernel.org/stable/c/a8365d1064ded3237…
https://git.kernel.org/stable/c/a2f6ff3444b663d6c…
https://git.kernel.org/stable/c/c9f6c51d36482805a…
https://git.kernel.org/stable/c/7eff72968161fb8dd…
https://git.kernel.org/stable/c/52025ebaa29f4eb4e…

Impacted products

2 products

Vendor	Product	Version
Linux	Linux	Affected: df6fb868d6118686805c2fa566e213a8f31c8e4f , < 7f3e5d72455936f42709116fabeca3bb216cda62 (git) Affected: df6fb868d6118686805c2fa566e213a8f31c8e4f , < 21d8efda029948d3666b0db5afcc0d36c0984aae (git) Affected: df6fb868d6118686805c2fa566e213a8f31c8e4f , < fc961dd7272b5e4a462999635e44a4770d7f2482 (git) Affected: df6fb868d6118686805c2fa566e213a8f31c8e4f , < a8365d1064ded323797c5e28e91070c52f44b76c (git) Affected: df6fb868d6118686805c2fa566e213a8f31c8e4f , < a2f6ff3444b663d6cfa63eadd61327a18592885a (git) Affected: df6fb868d6118686805c2fa566e213a8f31c8e4f , < c9f6c51d36482805ac3ffadb9663fe775a13e926 (git) Affected: df6fb868d6118686805c2fa566e213a8f31c8e4f , < 7eff72968161fb8ddb26113344de3b92fb7d7ef5 (git) Affected: df6fb868d6118686805c2fa566e213a8f31c8e4f , < 52025ebaa29f4eb4ed8bf92ce83a68f24ab7fdf7 (git)
Linux	Linux	Affected: 2.6.24 Unaffected: 0 , < 2.6.24 (semver) Unaffected: 5.10.253 , ≤ 5.10.* (semver) Unaffected: 5.15.203 , ≤ 5.15.* (semver) Unaffected: 6.1.168 , ≤ 6.1.* (semver) Unaffected: 6.6.131 , ≤ 6.6.* (semver) Unaffected: 6.12.80 , ≤ 6.12.* (semver) Unaffected: 6.18.21 , ≤ 6.18.* (semver) Unaffected: 6.19.11 , ≤ 6.19.* (semver) Unaffected: 7.0 , ≤ * (original_commit_for_fix)

Show details on NVD website

JSON

To clipboard

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    "dateReserved": "2026-03-09T15:48:24.089Z",
    "dateUpdated": "2026-05-11T22:08:31.017Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}

Sightings

Author	Source	Type	Date	Other

Nomenclature

Seen: The vulnerability was mentioned, discussed, or observed by the user.
Confirmed: The vulnerability has been validated from an analyst's perspective.
Published Proof of Concept: A public proof of concept is available for this vulnerability.
Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
Not confirmed: The user expressed doubt about the validity of the vulnerability.
Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.

Detection rules are retrieved from Rulezet.

Action not permitted

FKIE_CVE-2026-31428

CVE-2026-31428 (GCVE-0-2026-31428)

Tags

Sightings

Nomenclature