net/sched: fix pedit partial COW leading to page cache corruption
Priority HIGH 69CWE-190Published · Updated
Key facts
- Attack vector
- Local
- Privileges required
- Low
- User interaction
- None
- Attack complexity
- Low
- Impact type
- Code execution
- Confidentiality · integrity · availability
- High · High · High
- Fix status
- Fixed
Attack profile from CVSS 3.1 · CNA. Fix status from CNA and Red Hat. Impact type from CWE-190 and the CVSS impact.
Summary
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.
Why it matters now
Exploitation Proof of concept CISA SSVC · not in CISA KEV
EPSS 0.00639 50th percentileScored 2026-11-07
Fix Fixed Linux (Linux): 5.10.260, 5.15.211, 4.20 +8Red Hat: 32 advisories
SSVC decision points
CISA ADP · SSVC 2.0.3
- Exploitation
- Poc
- Automatable
- No
- Technical impact
- Total
The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.
Affected products
| Vendor | Product | Affected versions | Fixed in | Status | Source |
|---|---|---|---|---|---|
| Linux | Linux | 5.10.117 to before 5.10.260; 5.15.41 to before 5.15.211; 4.19.244 to before 4.20; 5.4.195 to before 5.5; 5.17.9 to before 5.18 | 5.10.260, 5.15.211, 4.20, 5.5, 5.18 | Patch available | CNA |
| Linux | Linux | 5.18 and later | 5.10.260, 5.15.211, 6.1.177, 6.6.144, 6.12.94, 6.18.36, 7.0.13, 7.1 | Patch available | CNA |
- Linux VendorLinux Affected 5.10.117 to before 5.10.260; 5.15.41 to before 5.15.211; 4.19.244 to before 4.20; 5.4.195 to before 5.5; 5.17.9 to before 5.18 Fixed in 5.10.260, 5.15.211, 4.20, 5.5, 5.18 Patch available CNA
- Linux VendorLinux Affected 5.18 and later Fixed in 5.10.260, 5.15.211, 6.1.177, 6.6.144, 6.12.94, 6.18.36, 7.0.13, 7.1 Patch available CNA
CPE configurations NVD · 9
| CPE | Versions | Role | Vendor |
|---|---|---|---|
| cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* | 4.19.244 to before 4.20; 5.4.195 to before 5.5; 5.10.117 to before 5.11; 5.15.41 to before 5.16; 5.17.9 to before 5.18; 5.18.1 to before 6.12.94; 6.13 to before 6.18.36; 6.19 to before 7.0.13 | Vulnerable | Linux |
| cpe:2.3:o:linux:linux_kernel:5.18:-:*:*:*:*:*:* | 5.18 | Vulnerable | Linux |
| cpe:2.3:o:linux:linux_kernel:5.18:rc7:*:*:*:*:*:* | 5.18 rc7 | Vulnerable | Linux |
| cpe:2.3:o:linux:linux_kernel:7.1:rc1:*:*:*:*:*:* | 7.1 rc1 | Vulnerable | Linux |
| cpe:2.3:o:linux:linux_kernel:7.1:rc2:*:*:*:*:*:* | 7.1 rc2 | Vulnerable | Linux |
| cpe:2.3:o:linux:linux_kernel:7.1:rc3:*:*:*:*:*:* | 7.1 rc3 | Vulnerable | Linux |
| cpe:2.3:o:linux:linux_kernel:7.1:rc4:*:*:*:*:*:* | 7.1 rc4 | Vulnerable | Linux |
| cpe:2.3:o:linux:linux_kernel:7.1:rc5:*:*:*:*:*:* | 7.1 rc5 | Vulnerable | Linux |
| cpe:2.3:o:linux:linux_kernel:7.1:rc6:*:*:*:*:*:* | 7.1 rc6 | Vulnerable | Linux |
- cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* Versions 4.19.244 to before 4.20; 5.4.195 to before 5.5; 5.10.117 to before 5.11; 5.15.41 to before 5.16; 5.17.9 to before 5.18; 5.18.1 to before 6.12.94; 6.13 to before 6.18.36; 6.19 to before 7.0.13 Vulnerable ·Linux
- cpe:2.3:o:linux:linux_kernel:5.18:-:*:*:*:*:*:* Versions 5.18 Vulnerable ·Linux
- cpe:2.3:o:linux:linux_kernel:5.18:rc7:*:*:*:*:*:* Versions 5.18 rc7 Vulnerable ·Linux
- cpe:2.3:o:linux:linux_kernel:7.1:rc1:*:*:*:*:*:* Versions 7.1 rc1 Vulnerable ·Linux
- cpe:2.3:o:linux:linux_kernel:7.1:rc2:*:*:*:*:*:* Versions 7.1 rc2 Vulnerable ·Linux
- cpe:2.3:o:linux:linux_kernel:7.1:rc3:*:*:*:*:*:* Versions 7.1 rc3 Vulnerable ·Linux
- cpe:2.3:o:linux:linux_kernel:7.1:rc4:*:*:*:*:*:* Versions 7.1 rc4 Vulnerable ·Linux
- cpe:2.3:o:linux:linux_kernel:7.1:rc5:*:*:*:*:*:* Versions 7.1 rc5 Vulnerable ·Linux
- cpe:2.3:o:linux:linux_kernel:7.1:rc6:*:*:*:*:*:* Versions 7.1 rc6 Vulnerable ·Linux
Remediation
- Fix · CNA Linux (Linux) Fixed in 5.10.260, 5.15.211, 4.20, 5.5, 5.18
- Fix · CNA Linux (Linux) Fixed in 5.10.260, 5.15.211, 6.1.177, 6.6.144, 6.12.94, 6.18.36, 7.0.13, 7.1
Red Hat 32 advisories
- RHSA-2026:40021 Released 2026-07-23 · Red Hat rating ImportantOpenShift Container Platform 4.13.69 bug fix and security update
- Red Hat OpenShift Container Platform 4.13 rhcos-x86_64-413.92.202607141229-0
- RHSA-2026:34048 Released 2026-07-09 · Red Hat rating ImportantOpenShift Container Platform 4.12.93 bug fix and security update
- Red Hat OpenShift Container Platform 4.12 rhcos-x86_64-412.86.202606251120-0
- RHSA-2026:34098 Released 2026-07-09 · Red Hat rating CriticalOpenShift Container Platform 4.17.55 bug fix and security update
- Red Hat OpenShift Container Platform 4.17 rhcos-aarch64-417.94.202606250942-0, rhcos-ppc64le-417.94.202606250942-0, rhcos-s390x-417.94.202606250942-0 +1
Show 29 more Red Hat advisories
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- Red Hat OpenShift Container Platform 4.15 rhcos-aarch64-415.92.202606200237-0, rhcos-ppc64le-415.92.202606200237-0, rhcos-s390x-415.92.202606200237-0 +1
- RHSA-2026:29863 Released 2026-07-02 · Red Hat rating ImportantOpenShift Container Platform 4.19.36 bug fix and security update
- Red Hat OpenShift Container Platform 4.19 rhcos-aarch64-4.19.9.6.202606241344-0, rhcos-ppc64le-4.19.9.6.202606241344-0, rhcos-s390x-4.19.9.6.202606241344-0 +1
- RHSA-2026:29856 Released 2026-07-01 · Red Hat rating ImportantOpenShift Container Platform 4.18.46 bug fix and security update
- Red Hat OpenShift Container Platform 4.18 rhcos-aarch64-418.94.202606221349-0, rhcos-ppc64le-418.94.202606221349-0, rhcos-s390x-418.94.202606221349-0 +1
- RHSA-2026:28887 Released 2026-07-01 · Red Hat rating CriticalOpenShift Container Platform 4.14.68 bug fix and security update
- Red Hat OpenShift Container Platform 4.14 rhcos-aarch64-414.92.202606231112-0, rhcos-ppc64le-414.92.202606231112-0, rhcos-s390x-414.92.202606231112-0 +1
- RHSA-2026:29080 Released 2026-07-01 · Red Hat rating ImportantOpenShift Container Platform 4.16.65 bug fix and security update
- Red Hat OpenShift Container Platform 4.16 rhcos-aarch64-416.94.202606230218-0, rhcos-ppc64le-416.94.202606230218-0, rhcos-s390x-416.94.202606230218-0 +1
- RHSA-2026:33666 Released 2026-06-30 · Red Hat rating Importantkernel security, bug fix, and enhancement update
- NVIDIA for RHEL 10 kernel-6.12.0-231.13.el10nv, kernel-64k-6.12.0-231.13.el10nv, kernel-64k-core-6.12.0-231.13.el10nv +32
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- RHSA-2026:29833 Released 2026-06-30 · Red Hat rating ImportantOpenShift Container Platform 4.21.22 bug fix and security update
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- Red Hat Enterprise Linux BaseOS (v. 10) kpatch-patch-6_12_0-211_16_1-1-2.el10_2
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- Red Hat Enterprise Linux BaseOS (v. 9) kpatch-patch-5_14_0-687_10_1-1-2.el9_8
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- RHSA-2026:33222 Released 2026-06-29 · Red Hat rating Importantkpatch-patch-5_14_0-427_100_1, kpatch-patch-5_14_0-427_113_1, kpatch-patch-5_14_0-427_126_1, kpatch-patch-5_14_0-427_68_2, and kpatch-patch-5_14_0-427_84_1 security update
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- RHSA-2026:33219 Released 2026-06-29 · Red Hat rating Importantkpatch-patch-4_18_0-477_107_1, kpatch-patch-4_18_0-477_120_1, kpatch-patch-4_18_0-477_130_1, kpatch-patch-4_18_0-477_143_1, and kpatch-patch-4_18_0-477_97_1 security update
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- RHSA-2026:27708 Released 2026-06-22 · Red Hat rating Importantkernel security, bug fix, and enhancement update
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- RHSA-2026:27731 Released 2026-06-22 · Red Hat rating Importantkernel security, bug fix, and enhancement update
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- RHSA-2026:27713 Released 2026-06-22 · Red Hat rating Importantkernel security, bug fix, and enhancement update
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- RHSA-2026:27705 Released 2026-06-22 · Red Hat rating Importantkernel security update
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- Red Hat Enterprise Linux BaseOS EUS EXTENSION (v.8.6) bpftool-4.18.0-372.197.1.el8_6, kernel-4.18.0-372.197.1.el8_6, kernel-abi-stablelists-4.18.0-372.197.1.el8_6 +14
- RHSA-2026:27707 Released 2026-06-22 · Red Hat rating Importantkernel security update
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- Red Hat Enterprise Linux BaseOS EUS EXTENSION (v.8.4) bpftool-4.18.0-305.195.1.el8_4, kernel-4.18.0-305.195.1.el8_4, kernel-abi-stablelists-4.18.0-305.195.1.el8_4 +14
- RHSA-2026:27706 Released 2026-06-22 · Red Hat rating Importantkernel-rt security update
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- RHSA-2026:27709 Released 2026-06-22 · Red Hat rating Importantkernel security update
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- RHSA-2026:27288 Released 2026-06-20 · Red Hat rating Importantkernel security, bug fix, and enhancement update
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- Red Hat Enterprise Linux BaseOS (v. 10) kernel-6.12.0-211.26.1.el10_2, kernel-64k-6.12.0-211.26.1.el10_2, kernel-64k-core-6.12.0-211.26.1.el10_2 +29
- Red Hat Enterprise Linux CodeReady Linux Builder (v. 10) kernel-tools-libs-devel-6.12.0-211.26.1.el10_2, libperf-6.12.0-211.26.1.el10_2
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- Red Hat Enterprise Linux Real Time for NFV (v. 10) kernel-rt-6.12.0-211.26.1.el10_2, kernel-rt-core-6.12.0-211.26.1.el10_2, kernel-rt-debug-6.12.0-211.26.1.el10_2 +9
- RHSA-2026:27353 Released 2026-06-19 · Red Hat rating Importantkernel security, bug fix, and enhancement update
- Red Hat Enterprise Linux BaseOS (v. 8) bpftool-4.18.0-553.136.1.el8_10, kernel-4.18.0-553.136.1.el8_10, kernel-abi-stablelists-4.18.0-553.136.1.el8_10 +19
- Red Hat Enterprise Linux CRB (v. 8) kernel-tools-libs-devel-4.18.0-553.136.1.el8_10
- RHSA-2026:27355 Released 2026-06-19 · Red Hat rating Importantkernel security update
- Red Hat Enterprise Linux BaseOS E4S (v.8.8) bpftool-4.18.0-477.148.1.el8_8, kernel-4.18.0-477.148.1.el8_8, kernel-abi-stablelists-4.18.0-477.148.1.el8_8 +14
- Red Hat Enterprise Linux BaseOS TUS (v.8.8) bpftool-4.18.0-477.148.1.el8_8, kernel-4.18.0-477.148.1.el8_8, kernel-abi-stablelists-4.18.0-477.148.1.el8_8 +14
- RHSA-2026:27354 Released 2026-06-19 · Red Hat rating Importantkernel-rt security, bug fix, and enhancement update
- Red Hat Enterprise Linux NFV (v. 8) kernel-rt-4.18.0-553.136.1.rt7.477.el8_10, kernel-rt-core-4.18.0-553.136.1.rt7.477.el8_10, kernel-rt-debug-4.18.0-553.136.1.rt7.477.el8_10 +9
- Red Hat Enterprise Linux RT (v. 8) kernel-rt-4.18.0-553.136.1.rt7.477.el8_10, kernel-rt-core-4.18.0-553.136.1.rt7.477.el8_10, kernel-rt-debug-4.18.0-553.136.1.rt7.477.el8_10 +7
Vendor assessments
Red Hat
Red Hat rating: Important. Red Hat's page for this CVE →
| Product | Status | Plan or fix |
|---|---|---|
| NVIDIA for RHEL 10 | Fixed | RHSA-2026:27709, RHSA-2026:33666 |
| Red Hat CodeReady Linux Builder EUS (v.9.6) | Fixed | RHSA-2026:27708 |
| Red Hat Enterprise Linux AppStream (v. 10) | Fixed | RHSA-2026:27288 |
| Red Hat Enterprise Linux AppStream (v. 9) | Fixed | RHSA-2026:27789 |
| Red Hat Enterprise Linux AppStream E4S (v.9.2) | Fixed | RHSA-2026:27705 |
| Red Hat Enterprise Linux AppStream E4S (v.9.4) | Fixed | RHSA-2026:27713 |
| Red Hat Enterprise Linux AppStream EUS (v. 10.0) | Fixed | RHSA-2026:27731 |
| Red Hat Enterprise Linux AppStream EUS (v.9.6) | Fixed | RHSA-2026:27708 |
| Red Hat Enterprise Linux BaseOS (v. 10) | Fixed | RHSA-2026:27288, RHSA-2026:33225 |
| Red Hat Enterprise Linux BaseOS (v. 8) | Fixed | RHSA-2026:27353, RHSA-2026:33220 |
| Red Hat Enterprise Linux BaseOS (v. 9) | Fixed | RHSA-2026:27789, RHSA-2026:33224 |
| Red Hat Enterprise Linux BaseOS AUS (v.8.4) | Fixed | RHSA-2026:27707 |
| Red Hat Enterprise Linux BaseOS AUS (v.8.6) | Fixed | RHSA-2026:27704 |
| Red Hat Enterprise Linux BaseOS E4S (v.8.8) | Fixed | RHSA-2026:27355, RHSA-2026:33219 |
| Red Hat Enterprise Linux BaseOS E4S (v.9.2) | Fixed | RHSA-2026:27705, RHSA-2026:33221 |
| Red Hat Enterprise Linux BaseOS E4S (v.9.4) | Fixed | RHSA-2026:27713, RHSA-2026:33222 |
| Red Hat Enterprise Linux BaseOS EUS (v. 10.0) | Fixed | RHSA-2026:27731 |
| Red Hat Enterprise Linux BaseOS EUS (v.9.6) | Fixed | RHSA-2026:27708, RHSA-2026:33223 |
| Red Hat Enterprise Linux BaseOS EUS EXTENSION (v.8.4) | Fixed | RHSA-2026:27707 |
| Red Hat Enterprise Linux BaseOS EUS EXTENSION (v.8.6) | Fixed | RHSA-2026:27704 |
| Red Hat Enterprise Linux BaseOS TUS (v.8.8) | Fixed | RHSA-2026:27355 |
| Red Hat Enterprise Linux CRB (v. 8) | Fixed | RHSA-2026:27353 |
| Red Hat Enterprise Linux CodeReady Linux Builder (v. 10) | Fixed | RHSA-2026:27288 |
| Red Hat Enterprise Linux CodeReady Linux Builder (v. 9) | Fixed | RHSA-2026:27789 |
| Red Hat Enterprise Linux CodeReady Linux Builder EUS (v. 10.0) | Fixed | RHSA-2026:27731 |
| Red Hat Enterprise Linux NFV (v. 8) | Fixed | RHSA-2026:27354 |
| Red Hat Enterprise Linux RT (v. 8) | Fixed | RHSA-2026:27354 |
| Red Hat Enterprise Linux Real Time (v. 10) | Fixed | RHSA-2026:27288 |
| Red Hat Enterprise Linux Real Time (v. 9) | Fixed | RHSA-2026:27789 |
| Red Hat Enterprise Linux Real Time E4S (v.9.2) | Fixed | RHSA-2026:27706 |
| Red Hat Enterprise Linux Real Time E4S (v.9.4) | Fixed | RHSA-2026:27713 |
| Red Hat Enterprise Linux Real Time EUS (v. 10.0) | Fixed | RHSA-2026:27731 |
| Red Hat Enterprise Linux Real Time EUS (v.9.6) | Fixed | RHSA-2026:27708 |
| Red Hat Enterprise Linux Real Time for NFV (v. 10) | Fixed | RHSA-2026:27288 |
| Red Hat Enterprise Linux Real Time for NFV (v. 9) | Fixed | RHSA-2026:27789 |
| Red Hat Enterprise Linux Real Time for NFV E4S (v.9.2) | Fixed | RHSA-2026:27706 |
| Red Hat Enterprise Linux Real Time for NFV E4S (v.9.4) | Fixed | RHSA-2026:27713 |
| Red Hat Enterprise Linux Real Time for NFV EUS (v. 10.0) | Fixed | RHSA-2026:27731 |
| Red Hat Enterprise Linux Real Time for NFV EUS (v.9.6) | Fixed | RHSA-2026:27708 |
| Red Hat OpenShift Container Platform 4.12 | Fixed | RHSA-2026:34048 |
| Red Hat OpenShift Container Platform 4.13 | Fixed | RHSA-2026:40021 |
| Red Hat OpenShift Container Platform 4.14 | Fixed | RHSA-2026:28887 |
| Red Hat OpenShift Container Platform 4.15 | Fixed | RHSA-2026:28962 |
| Red Hat OpenShift Container Platform 4.16 | Fixed | RHSA-2026:29080 |
| Red Hat OpenShift Container Platform 4.17 | Fixed | RHSA-2026:34098 |
| Red Hat OpenShift Container Platform 4.18 | Fixed | RHSA-2026:29856 |
| Red Hat OpenShift Container Platform 4.19 | Fixed | RHSA-2026:29863 |
| Red Hat OpenShift Container Platform 4.20 | Fixed | RHSA-2026:29799 |
| Red Hat OpenShift Container Platform 4.21 | Fixed | RHSA-2026:29833 |
| Red Hat OpenShift Container Platform 4.22 | Fixed | RHSA-2026:29794 |
Not affected: 3 products
- Red Hat Enterprise Linux 10
- Red Hat Enterprise Linux 6
- Red Hat Enterprise Linux 7
Timeline
- 2026-10-02 Threatist record created from CVE-2026-46331
- 2026-10-03 Alias added: GHSA-cr2w-747q-47qc
- 2026-10-09 Affected versions changed · Red Hat
- 2026-10-25 EPSS moved to the 50th–90th percentile
References
Patch 8
- 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
Advisory 32
- https://access.redhat.com/errata/RHSA-2026:27288
- https://access.redhat.com/errata/RHSA-2026:27353
- https://access.redhat.com/errata/RHSA-2026:27354
- https://access.redhat.com/errata/RHSA-2026:27355
- https://access.redhat.com/errata/RHSA-2026:27704
- https://access.redhat.com/errata/RHSA-2026:27705
- https://access.redhat.com/errata/RHSA-2026:27706
- https://access.redhat.com/errata/RHSA-2026:27707
- https://access.redhat.com/errata/RHSA-2026:27708
- https://access.redhat.com/errata/RHSA-2026:27709
- https://access.redhat.com/errata/RHSA-2026:27713
- https://access.redhat.com/errata/RHSA-2026:27731
- https://access.redhat.com/errata/RHSA-2026:27789
- https://access.redhat.com/errata/RHSA-2026:28887
- https://access.redhat.com/errata/RHSA-2026:29080
- https://access.redhat.com/errata/RHSA-2026:29794
- https://access.redhat.com/errata/RHSA-2026:29799
- https://access.redhat.com/errata/RHSA-2026:29833
- https://access.redhat.com/errata/RHSA-2026:29856
- https://access.redhat.com/errata/RHSA-2026:29863
- https://access.redhat.com/errata/RHSA-2026:33219
- https://access.redhat.com/errata/RHSA-2026:33220
- https://access.redhat.com/errata/RHSA-2026:33221
- https://access.redhat.com/errata/RHSA-2026:33222
- https://access.redhat.com/errata/RHSA-2026:33223
- https://access.redhat.com/errata/RHSA-2026:33224
- https://access.redhat.com/errata/RHSA-2026:33225
- https://access.redhat.com/errata/RHSA-2026:33666
- https://access.redhat.com/security/cve/CVE-2026-46331
- https://bugzilla.redhat.com/show_bug.cgi?id=2479492
- https://github.com/sgkdev/packet_edit_meme/tree/main
- https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-46331.json
More Linux Kernel vulnerabilities
- TI-2025-26358 tls: fix handling of zero-length records on the rx_list KEVCVSS 3.1CRITICAL 9.8
- TI-2026-38352 netfilter: bridge: make ebt_snat ARP rewrite writable KEVCVSS 3.1HIGH 8.8
- TI-2013-05264 The (1) get_user and (2) put_user API functions in the Linux kernel before 3.5.5 on the… KEVCVSS 3.1HIGH 8.8
- TI-2022-00125 Integer overflow in kernel KEVCVSS 3.1HIGH 8.4
- TI-2013-01864 The perf_swevent_init function in kernel/events/core.c in the Linux kernel before 3.8.9… KEVCVSS 3.1HIGH 8.4
- TI-2021-05514 Heap Out-Of-Bounds Write in Netfilter IP6T_SO_SET_REPLACE KEVCVSS 3.1HIGH 8.3
Sources
- CVE-2026-46331 · CVE Program
- CVE-2026-46331 · NVD
- FIRST EPSS
- GHSA-cr2w-747q-47qc · GitHub Advisory Database · CC BY 4.0
- CVE-2026-46331 · Red Hat security data · CC BY 4.0
This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences