CVE-2026-31681
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: xt_multiport: validate range encoding in checkentry
In the Linux kernel, the following vulnerability has been resolved: netfilter: xt_multiport: validate range encoding in checkentry ports_match_v1() treats any non-zero pflags entry as the start of a port range and unconditionally consumes the next ports[] element as the range end. The checkentry path currently validates protocol, flags and count, but it does not validate the range encoding itself. As a result, malformed rules can mark the last slot as a range start or place two range starts back to back, leaving ports_match_v1() to step past the last valid ports[] element while interpreting the rule. Reject malformed multiport v1 rules in checkentry by validating that each range start has a following element and that the following element is not itself marked as another range start.
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) |
|---|---|---|---|---|---|
| a89ecb6a2ef732d04058d87801e2b6bd7e5c7089 | affected | git | 8c5bf8f5b478f569191c4a7982de7cd5f5f73c1a | Unavailable | None listed |
| a89ecb6a2ef732d04058d87801e2b6bd7e5c7089 | affected | git | c9749f6232c845e31c21d4cc72200211df15d8a2 | Unavailable | None listed |
| a89ecb6a2ef732d04058d87801e2b6bd7e5c7089 | affected | git | b67d638cbee9975c765feb45c126e96ed11ec802 | Unavailable | None listed |
| a89ecb6a2ef732d04058d87801e2b6bd7e5c7089 | affected | git | 36bf0d98e180a7c384c8d8a59b0d2d4b80e5eb16 | Unavailable | None listed |
| a89ecb6a2ef732d04058d87801e2b6bd7e5c7089 | affected | git | aec14808271f2bf2b656de6ff12dfe73c5fd3b67 | Unavailable | None listed |
| a89ecb6a2ef732d04058d87801e2b6bd7e5c7089 | affected | git | 8368ce8eb01f0b91111d814703696e780d0ef12f | Unavailable | None listed |
| a89ecb6a2ef732d04058d87801e2b6bd7e5c7089 | affected | git | 1e4baa853f1cc4227e04f52d6860524707cfb294 | Unavailable | None listed |
| a89ecb6a2ef732d04058d87801e2b6bd7e5c7089 | affected | git | ff64c5bfef12461df8450e0f50bb693b5269c720 | 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) |
|---|---|---|---|---|---|
| 2.6.17 | affected | Unavailable | Unavailable | Unavailable | None listed |
| 0 | unaffected | semver | 2.6.17 | Unavailable | None listed |
| 5.10.258 | unaffected | semver | Unavailable | 5.10.* | None listed |
| 5.15.209 | unaffected | semver | Unavailable | 5.15.* | None listed |
| 6.1.175 | unaffected | semver | Unavailable | 6.1.* | None listed |
| 6.6.136 | unaffected | semver | Unavailable | 6.6.* | None listed |
| 6.12.83 | unaffected | semver | Unavailable | 6.12.* | None listed |
| 6.18.24 | unaffected | semver | Unavailable | 6.18.* | None listed |
| 6.19.14 | unaffected | semver | Unavailable | 6.19.* | None listed |
| 7.0 | unaffected | original_commit_for_fix | Unavailable | * | None listed |