Vulnerability details
CVE-2026-46331
Linux LinuxRed Hat OpenShift Container Platform 4Siemens SIMATIC S7-1500 TM MFP - GNU/Linux subsystem
net/sched: fix pedit partial COW leading to page cache corruption
CVSS 3.1
7.8High
Official description
In the Linux kernel, the following vulnerability has been resolved: net/sched: fix pedit partial COW leading to page cache corruption tcf_pedit_act() computes the COW range for skb_ensure_writable() once before the key loop using tcfp_off_max_hint, but the hint does not account for the runtime header offset added by typed keys. This can leave part of the write region un-COW'd. Fix by moving skb_ensure_writable() inside the per-key loop where the actual write offset is known, and add overflow checking on the offset arithmetic. For negative offsets (e.g. Ethernet header edits at ingress), use skb_cow() to COW the headroom instead. Guard offset_valid() against INT_MIN, where negation is undefined.
CVSS scores
| Score | Version | Source | Vector |
|---|---|---|---|
| 7.8High | 3.1 | CVEProject cvelistV5 (CNA) (Linux) | CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H |
| 6.7Medium | 3.1 | CVEProject cvelistV5 (CNA) (redhat-SADP) | CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H |
Affected products
| Vendor | Product | Versions | Source |
|---|---|---|---|
| Linux | Linux | 2ec2dd7d51a9320151f275ddbb2b53260fb32ca1 | CVEProject cvelistV5 (CNA) |
| Linux | Linux | 5.18 | CVEProject cvelistV5 (CNA) |
| Linux | Linux | c19cc520b3d69904e9518d401ad0df7f4702aca0 | CVEProject cvelistV5 (CNA) |
| Linux | Linux | d0c38a914b0c4c21d553da801003d36979016726 | CVEProject cvelistV5 (CNA) |
| Linux | Linux | 4.19.244 ≤ v < 4.20 | CVEProject cvelistV5 (CNA) |
| Linux | Linux | 5.10.117 ≤ v < 5.10.260 | CVEProject cvelistV5 (CNA) |
| Linux | Linux | 5.15.41 ≤ v < 5.15.211 | CVEProject cvelistV5 (CNA) |
| Linux | Linux | 5.17.9 ≤ v < 5.18 | CVEProject cvelistV5 (CNA) |
| Linux | Linux | 5.4.195 ≤ v < 5.5 | CVEProject cvelistV5 (CNA) |
| Linux | Linux | 8b796475fd7882663a870456466a4fb315cc1bd6 ≤ v < 899ee91156e57784090c5565e4f31bd7dbffbc5a | CVEProject cvelistV5 (CNA) |
| Linux | Linux | 8b796475fd7882663a870456466a4fb315cc1bd6 ≤ v < 3dee9d0c198faeb95d052c1b94c2958751a28512 | CVEProject cvelistV5 (CNA) |
| Linux | Linux | 8b796475fd7882663a870456466a4fb315cc1bd6 ≤ v < b198ed4e52580a7238c7c7082f03906f8b310313 | CVEProject cvelistV5 (CNA) |
| Linux | Linux | 8b796475fd7882663a870456466a4fb315cc1bd6 ≤ v < 2bec122b9fb91507a758ab5e3e5c4fbe7cb3f61b | CVEProject cvelistV5 (CNA) |
| Linux | Linux | 8b796475fd7882663a870456466a4fb315cc1bd6 ≤ v < b685d6ef6f07a3b5ce814565a25f39f2157538a5 | CVEProject cvelistV5 (CNA) |
| Linux | Linux | 8b796475fd7882663a870456466a4fb315cc1bd6 ≤ v < a071e057518decc5e3bec89855758f5f8786f2c5 | CVEProject cvelistV5 (CNA) |
| Linux | Linux | abe35bf3be51482593076d516a680d79e5fbc8e1 ≤ v < 544d857b42a1734b923040e13aa61a6fd4746cf2 | CVEProject cvelistV5 (CNA) |
| Linux | Linux | b773640d5bb9e2acfd91e2695717af04d47aa116 ≤ v < d5d01d35a5a7d36f7cb679b67d9cbdd5205672dc | CVEProject cvelistV5 (CNA) |
| Red Hat | Red Hat OpenShift Container Platform 4 | All | CVEProject cvelistV5 (CNA) |
| Siemens | SIMATIC S7-1500 TM MFP - GNU/Linux subsystem | All | CVEProject cvelistV5 (CNA) |
References and advisories
45- https://git.kernel.org/stable/c/544d857b42a1734b923040e13aa61a6fd4746cf2
- https://git.kernel.org/stable/c/d5d01d35a5a7d36f7cb679b67d9cbdd5205672dc
- https://git.kernel.org/stable/c/a071e057518decc5e3bec89855758f5f8786f2c5
- https://git.kernel.org/stable/c/b685d6ef6f07a3b5ce814565a25f39f2157538a5
- https://git.kernel.org/stable/c/2bec122b9fb91507a758ab5e3e5c4fbe7cb3f61b
- https://git.kernel.org/stable/c/b198ed4e52580a7238c7c7082f03906f8b310313
- https://git.kernel.org/stable/c/3dee9d0c198faeb95d052c1b94c2958751a28512
- https://git.kernel.org/stable/c/899ee91156e57784090c5565e4f31bd7dbffbc5a
- https://github.com/sgkdev/packet_edit_meme/tree/main exploit
- https://access.redhat.com/security/cve/CVE-2026-46331 vdb-entryx_refsource_REDHAT
- https://bugzilla.redhat.com/show_bug.cgi?id=2479492 issue-trackingx_refsource_REDHAT
- https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-46331.json x_sadp-csaf-vex
- https://access.redhat.com/errata/RHSA-2026:27709 vendor-advisoryx_refsource_REDHAT
- https://access.redhat.com/errata/RHSA-2026:33666 vendor-advisoryx_refsource_REDHAT
- https://access.redhat.com/errata/RHSA-2026:34048 vendor-advisoryx_refsource_REDHAT
- https://access.redhat.com/errata/RHSA-2026:40021 vendor-advisoryx_refsource_REDHAT
- https://access.redhat.com/errata/RHSA-2026:28887 vendor-advisoryx_refsource_REDHAT
- https://access.redhat.com/errata/RHSA-2026:28962 vendor-advisoryx_refsource_REDHAT
- https://access.redhat.com/errata/RHSA-2026:29080 vendor-advisoryx_refsource_REDHAT
- https://access.redhat.com/errata/RHSA-2026:34098 vendor-advisoryx_refsource_REDHAT
- https://access.redhat.com/errata/RHSA-2026:29856 vendor-advisoryx_refsource_REDHAT
- https://access.redhat.com/errata/RHSA-2026:29863 vendor-advisoryx_refsource_REDHAT
- https://access.redhat.com/errata/RHSA-2026:29799 vendor-advisoryx_refsource_REDHAT
- https://access.redhat.com/errata/RHSA-2026:29833 vendor-advisoryx_refsource_REDHAT
- https://access.redhat.com/errata/RHSA-2026:29794 vendor-advisoryx_refsource_REDHAT
- https://access.redhat.com/errata/RHSA-2026:27731 vendor-advisoryx_refsource_REDHAT
- https://access.redhat.com/errata/RHSA-2026:27288 vendor-advisoryx_refsource_REDHAT
- https://access.redhat.com/errata/RHSA-2026:27705 vendor-advisoryx_refsource_REDHAT
- https://access.redhat.com/errata/RHSA-2026:27713 vendor-advisoryx_refsource_REDHAT
- https://access.redhat.com/errata/RHSA-2026:27708 vendor-advisoryx_refsource_REDHAT
- https://access.redhat.com/errata/RHSA-2026:27789 vendor-advisoryx_refsource_REDHAT
- https://access.redhat.com/errata/RHSA-2026:33225 vendor-advisoryx_refsource_REDHAT
- https://access.redhat.com/errata/RHSA-2026:27353 vendor-advisoryx_refsource_REDHAT
- https://access.redhat.com/errata/RHSA-2026:33220 vendor-advisoryx_refsource_REDHAT
- https://access.redhat.com/errata/RHSA-2026:27707 vendor-advisoryx_refsource_REDHAT
- https://access.redhat.com/errata/RHSA-2026:27704 vendor-advisoryx_refsource_REDHAT
- https://access.redhat.com/errata/RHSA-2026:27355 vendor-advisoryx_refsource_REDHAT
- https://access.redhat.com/errata/RHSA-2026:33219 vendor-advisoryx_refsource_REDHAT
- https://access.redhat.com/errata/RHSA-2026:33221 vendor-advisoryx_refsource_REDHAT
- https://access.redhat.com/errata/RHSA-2026:33222 vendor-advisoryx_refsource_REDHAT
- https://access.redhat.com/errata/RHSA-2026:33223 vendor-advisoryx_refsource_REDHAT
- https://access.redhat.com/errata/RHSA-2026:33224 vendor-advisoryx_refsource_REDHAT
- https://access.redhat.com/errata/RHSA-2026:27354 vendor-advisoryx_refsource_REDHAT
- https://access.redhat.com/errata/RHSA-2026:27706 vendor-advisoryx_refsource_REDHAT
- https://cert-portal.siemens.com/productcert/html/ssa-784472.html
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Details
- Published
- 2026-06-16
- Last updated
- 2026-10-15
- State
- Published
- Assigner (CNA)
- Linux
Exploit prediction (EPSS)
0.63%
Probability of exploitation in 30 days
50.7%
Percentile (among all CVEs)
SSVC assessment (CISA)
- Automatable
- No
- Exploitation
- Proof of concept
- Technical impact
- Total
Weaknesses (CWE)
- CWE-190Integer Overflow or Wraparound
- CWE-787Out-of-bounds Write