CVE-2026-31422
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: cls_flow: fix NULL pointer dereference on shared blocks
In the Linux kernel, the following vulnerability has been resolved: net/sched: cls_flow: fix NULL pointer dereference on shared blocks flow_change() calls tcf_block_q() and dereferences q->handle to derive a default baseclass. Shared blocks leave block->q NULL, causing a NULL deref when a flow filter without a fully qualified baseclass is created on a shared block. Check tcf_block_shared() before accessing block->q and return -EINVAL for shared blocks. This avoids the null-deref shown below: ======================================================================= KASAN: null-ptr-deref in range [0x0000000000000038-0x000000000000003f] RIP: 0010:flow_change (net/sched/cls_flow.c:508) Call Trace: tc_new_tfilter (net/sched/cls_api.c:2432) rtnetlink_rcv_msg (net/core/rtnetlink.c:6980) [...] =======================================================================
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) |
|---|---|---|---|---|---|
| 1abf272022cf1d18469405f47b4ec49c6a3125db | affected | git | 57f94ac7e953eece5ed4819605a18f3cdfc63dcc | Unavailable | None listed |
| 1abf272022cf1d18469405f47b4ec49c6a3125db | affected | git | 942813276edeb1741fa5b0a73471beb4e495fa08 | Unavailable | None listed |
| 1abf272022cf1d18469405f47b4ec49c6a3125db | affected | git | cc707a4fd4c3b6ab2722e06bc359aa010e13d408 | Unavailable | None listed |
| 1abf272022cf1d18469405f47b4ec49c6a3125db | affected | git | 4a09f72007201c9f667dc47f64517ec23eea65e5 | Unavailable | None listed |
| 1abf272022cf1d18469405f47b4ec49c6a3125db | affected | git | 9bf5fc36a43f7b8b5507c96e74fb81f1e8b4957e | Unavailable | None listed |
| 1abf272022cf1d18469405f47b4ec49c6a3125db | affected | git | a208c3e1232997e9317887294c20008dfcb75449 | Unavailable | None listed |
| 1abf272022cf1d18469405f47b4ec49c6a3125db | affected | git | 415ea0c973c754b9f375225807810eb9045f4293 | Unavailable | None listed |
| 1abf272022cf1d18469405f47b4ec49c6a3125db | affected | git | 1a280dd4bd1d616a01d6ffe0de284c907b555504 | 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) |
|---|---|---|---|---|---|
| 4.15 | affected | Unavailable | Unavailable | Unavailable | None listed |
| 0 | unaffected | semver | 4.15 | 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 |
| 6.6.134 | unaffected | semver | Unavailable | 6.6.* | None listed |
| 6.12.81 | unaffected | semver | Unavailable | 6.12.* | None listed |
| 6.18.22 | unaffected | semver | Unavailable | 6.18.* | None listed |
| 6.19.12 | unaffected | semver | Unavailable | 6.19.* | None listed |
| 7.0 | unaffected | original_commit_for_fix | Unavailable | * | None listed |