CVE-2026-46300
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: skbuff: preserve shared-frag marker during coalescing
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.
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) |
|---|---|---|---|---|---|
| cef401de7be8c4e155c6746bfccf721a4fa5fab9 | affected | git | 3599e6b3cc1ada96883d496a50a210d3afbb6987 | Unavailable | None listed |
| cef401de7be8c4e155c6746bfccf721a4fa5fab9 | affected | git | 2f2b16022a2e10ca7bccfb98db5ed2ec0f72641c | Unavailable | None listed |
| cef401de7be8c4e155c6746bfccf721a4fa5fab9 | affected | git | 9d3e5fd19fe1063bf607219e8562fbd567b8e8d5 | Unavailable | None listed |
| cef401de7be8c4e155c6746bfccf721a4fa5fab9 | affected | git | 78bf6b6bb19541d19fbda6242e7cfe2c682763c0 | Unavailable | None listed |
| cef401de7be8c4e155c6746bfccf721a4fa5fab9 | affected | git | 760e1addc27ba1a7beb4a0a7e8b3e9ec49e7a34e | Unavailable | None listed |
| cef401de7be8c4e155c6746bfccf721a4fa5fab9 | affected | git | 3bd9e113d50034db99d7ef69fd8e5242d15e414a | Unavailable | None listed |
| cef401de7be8c4e155c6746bfccf721a4fa5fab9 | affected | git | 3884358a9286b17f389a72b1426fc4547c23c111 | Unavailable | None listed |
| cef401de7be8c4e155c6746bfccf721a4fa5fab9 | affected | git | f84eca5817390257cef78013d0112481c503b4a3 | 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) |
|---|---|---|---|---|---|
| 3.9 | affected | Unavailable | Unavailable | Unavailable | None listed |
| 0 | unaffected | semver | 3.9 | Unavailable | None listed |
| 5.10.257 | unaffected | semver | Unavailable | 5.10.* | None listed |
| 5.15.208 | unaffected | semver | Unavailable | 5.15.* | None listed |
| 6.1.174 | unaffected | semver | Unavailable | 6.1.* | None listed |
| 6.6.141 | unaffected | semver | Unavailable | 6.6.* | None listed |
| 6.12.91 | unaffected | semver | Unavailable | 6.12.* | None listed |
| 6.18.33 | unaffected | semver | Unavailable | 6.18.* | None listed |
| 7.0.10 | unaffected | semver | Unavailable | 7.0.* | None listed |
| 7.1 | unaffected | original_commit_for_fix | Unavailable | * | None listed |