In the Linux kernel, the following vulnerability has been resolved: net: skbuff: preserve shared-frag marker during coalescing skb_try_coalesce() can attach paged frags from @from to @to. If @from has SKBFL_SHARED_FRAG set, the resulting @to skb can contain the same externally-owned or page-cache-backed frags, but the shared-frag marker is currently lost. That breaks the invariant relied on by later in-place writers. In particular, ESP input checks skb_has_shared_frag() before deciding whether an uncloned nonlinear skb can skip skb_cow_data(). If TCP receive coalescing has moved shared frags into an unmarked skb, ESP can see skb_has_shared_frag() as false and decrypt in place over page-cache backed frags. Propagate SKBFL_SHARED_FRAG when skb_try_coalesce() transfers paged frags. The tailroom copy path does not need the marker because it copies bytes into @to's linear data rather than transferring frag descriptors.
| Vendor | Product | Versions |
|---|---|---|
| linux | linux_kernel | cef401de7be8c4e155c6746bfccf721a4fa5fab9, cef401de7be8c4e155c6746bfccf721a4fa5fab9, cef401de7be8c4e155c6746bfccf721a4fa5fab9, cef401de7be8c4e155c6746bfccf721a4fa5fab9, cef401de7be8c4e155c6746bfccf721a4fa5fab9, cef401de7be8c4e155c6746bfccf721a4fa5fab9, cef401de7be8c4e155c6746bfccf721a4fa5fab9, cef401de7be8c4e155c6746bfccf721a4fa5fab9, 3.9 |
Downstream vendors/products affected by this vulnerability
| Vendor | Product | Source | Confidence |
|---|---|---|---|
| fedora | fedora linux | cert_advisory | 90% |
| linux | linux | mitre_affected | 90% |
| open source | open source linux kernel | cert_advisory | 90% |
Updated description with detailed exploit information, changed vendor to 'Linux Kernel', added affected versions, updated severity to 'HIGH', and included new CWE IDs and tags.
Updated affected versions to include specific kernel versions and added fixed version numbers.
Updated patch information with a specific fix for CVE-2026-46300.
Updated description with technical details, changed vendor to Zellic, updated severity to HIGH, and added CVSS estimate of 7.8.
Updated description with detailed technical information and noted that patches are now available.
Updated description with technical details about the exploitation method and added new tags related to the vulnerability.
Updated description with new details, added CVSS score of 7.8, and included new CVE ID.
Updated description with new technical details, added affected versions, changed severity to HIGH, and included new relevant tags.
Updated severity from HIGH to CRITICAL.
Initial creation
