cve-2026-46323
HIGH CVSS 7.8 nvd
Description
In the Linux kernel, the following vulnerability has been resolved: net: gro: don't merge zcopy skbs skb_gro_receive() can currently copy frags between the source and GRO skb, without checking the zerocopy status, and in particular the SKBFL_MANAGED_FRAG_REFS flag. When SKBFL_MANAGED_FRAG_REFS is set, the skb doesn't hold a reference on the pages in shinfo->frags. Appending those frags to another skb's frags without fixing up the page refcount can lead to UAF. When either the last skb in the GRO chain (the one we would append frags to) or the source skb is zerocopy, don't merge the skbs.
Timeline
- Published
- 2026-06-09
- Last Modified
- 2026-09-08
CVSS Details
- Attack Vector
- LOCAL
- Attack Complexity
- LOW
- Privileges Required
- LOW
Affected Products
- linux linux_kernel
CVSS metrics
| Version | Base | Severity | Vector | Exploitability | Impact | Source |
|---|---|---|---|---|---|---|
| 3.1 | 7.8 | HIGH | CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H |
1.8 | 5.9 | 416baaa9-dc9f-4396-8d5f-8c081fb06d67 |
| 3.1 | 7.8 | HIGH | CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H |
1.8 | 5.9 | 0b0ca135-0b70-47e7-9f44-1890c2a1c46c |
CPE configurations
OR
| CPE | Version range | Vulnerable |
|---|---|---|
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* |
>= 6.0, < 6.1.176 | yes |
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* |
>= 6.2, < 6.6.142 | yes |
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* |
>= 6.7, < 6.12.92 | yes |
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* |
>= 6.13, < 6.18.34 | yes |
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* |
>= 6.19, < 7.0.11 | yes |
cpe:2.3:o:linux:linux_kernel:7.1:rc1:*:*:*:*:*:* |
— | yes |
cpe:2.3:o:linux:linux_kernel:7.1:rc2:*:*:*:*:*:* |
— | yes |
cpe:2.3:o:linux:linux_kernel:7.1:rc3:*:*:*:*:*:* |
— | yes |
cpe:2.3:o:linux:linux_kernel:7.1:rc4:*:*:*:*:*:* |
— | yes |
NVD metadata
- NVD status
- Modified
- Source identifier
416baaa9-dc9f-4396-8d5f-8c081fb06d67
References
- https://git.kernel.org/stable/c/1f9c828556416fbe3f49386708ce999fc4d4da06 Patch
- https://git.kernel.org/stable/c/3c6cc9f2ca65b6dd61b1af75452dc0e1cd0aad8d Patch
- https://git.kernel.org/stable/c/44bea2032af0425e4ce6d26a8af0ede79db49ec1 Patch
- https://git.kernel.org/stable/c/479084ae0e1d9cb7929cb4298d35623de189f80a Patch
- https://git.kernel.org/stable/c/4db79a322db8c97f7b73b8a347395ef4d685eb40 Patch
- https://git.kernel.org/stable/c/e334cbf3388fd9334503a778a82d9e9f14dd2f71 Patch
- https://access.redhat.com/errata/RHSA-2026:27708 Third Party Advisory
- https://access.redhat.com/errata/RHSA-2026:27731 Third Party Advisory
- https://access.redhat.com/errata/RHSA-2026:27735 Third Party Advisory
- https://access.redhat.com/errata/RHSA-2026:36018 Third Party Advisory
- https://access.redhat.com/errata/RHSA-2026:44230
- https://access.redhat.com/errata/RHSA-2026:44231
- https://access.redhat.com/errata/RHSA-2026:44259
- https://access.redhat.com/errata/RHSA-2026:44262
- https://access.redhat.com/errata/RHSA-2026:44270
- https://access.redhat.com/errata/RHSA-2026:47727
- https://access.redhat.com/errata/RHSA-2026:62639
- https://access.redhat.com/errata/RHSA-2026:62640
- https://access.redhat.com/errata/RHSA-2026:62641
- https://access.redhat.com/errata/RHSA-2026:62642
- https://access.redhat.com/security/cve/CVE-2026-46323 Third Party Advisory
- https://bugzilla.redhat.com/show_bug.cgi?id=2479832 Third Party Advisory
- https://cert-portal.siemens.com/productcert/html/ssa-019113.html
- https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-46323.json Third Party Advisory
Linked Vulnerabilities
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