CVE-2026-23270
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)
net/sched: Only allow act_ct to bind to clsact/ingress qdiscs and shared blocks
In the Linux kernel, the following vulnerability has been resolved: net/sched: Only allow act_ct to bind to clsact/ingress qdiscs and shared blocks As Paolo said earlier [1]: "Since the blamed commit below, classify can return TC_ACT_CONSUMED while the current skb being held by the defragmentation engine. As reported by GangMin Kim, if such packet is that may cause a UaF when the defrag engine later on tries to tuch again such packet." act_ct was never meant to be used in the egress path, however some users are attaching it to egress today [2]. Attempting to reach a middle ground, we noticed that, while most qdiscs are not handling TC_ACT_CONSUMED, clsact/ingress qdiscs are. With that in mind, we address the issue by only allowing act_ct to bind to clsact/ingress qdiscs and shared blocks. That way it's still possible to attach act_ct to egress (albeit only with clsact). [1] https://lore.kernel.org/netdev/674b8cbfc385c6f37fb29a1de08d8fe5c2b0fbee.1771321118.git.pabeni@redhat.com/ [2] https://lore.kernel.org/netdev/cc6bfb4a-4a2b-42d8-b9ce-7ef6644fb22b@ovn.org/
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) |
|---|---|---|---|---|---|
| 172ba7d46c202e679f3ccb10264c67416aaeb1c4 | affected | git | bc4e5bb529823a09f02dbe96169de679a9db26e0 | Unavailable | None listed |
| 0b5b831122fc3789fff75be433ba3e4dd7b779d4 | affected | git | fb3c380a54e33d1fd272cc342faa906d787d7ef1 | Unavailable | None listed |
| 73f7da5fd124f2cda9161e2e46114915e6e82e97 | affected | git | 5a110ddcc99bda77a28598b3555fe009eaab3828 | Unavailable | None listed |
| 3f14b377d01d8357eba032b4cabc8c1149b458b6 | affected | git | 524ce8b4ea8f64900b6c52b6a28df74f6bc0801e | Unavailable | None listed |
| 3f14b377d01d8357eba032b4cabc8c1149b458b6 | affected | git | 380ad8b7c65ea7aa10ef2258297079ed5ac1f5b6 | Unavailable | None listed |
| 3f14b377d01d8357eba032b4cabc8c1149b458b6 | affected | git | 9deda0fcda5c1f388c5e279541850b71a2ccfcf4 | Unavailable | None listed |
| 3f14b377d01d8357eba032b4cabc8c1149b458b6 | affected | git | 11cb63b0d1a0685e0831ae3c77223e002ef18189 | Unavailable | None listed |
| f5346df0591d10bc948761ca854b1fae6d2ef441 | affected | git | Unavailable | Unavailable | None listed |
| 5.15.148 | affected | semver | 5.15.203 | Unavailable | None listed |
| 6.1.75 | affected | semver | 6.1.167 | Unavailable | None listed |
| 6.6.14 | affected | semver | 6.6.130 | Unavailable | None listed |
| 6.7.2 | affected | semver | 6.8 | 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) |
|---|---|---|---|---|---|
| 6.8 | affected | Unavailable | Unavailable | Unavailable | None listed |
| 0 | unaffected | semver | 6.8 | Unavailable | None listed |
| 5.15.203 | unaffected | semver | Unavailable | 5.15.* | None listed |
| 6.1.167 | unaffected | semver | Unavailable | 6.1.* | None listed |
| 6.6.130 | unaffected | semver | Unavailable | 6.6.* | None listed |
| 6.12.77 | unaffected | semver | Unavailable | 6.12.* | None listed |
| 6.18.18 | unaffected | semver | Unavailable | 6.18.* | None listed |
| 6.19.8 | unaffected | semver | Unavailable | 6.19.* | None listed |
| 7.0 | unaffected | original_commit_for_fix | Unavailable | * | None listed |