CVE-2026-46300
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.
- CVSS v3.1
- 7.8 HIGH
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H - CVSS v3.1
- 7.8 HIGH
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H - CVSS v3.1
- 7.8 HIGH
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H - EPSS
- 9.48% chance of exploitation in the next 30 days, 95th percentile
- Published
- 2026-05-23
- Updated
- 2026-08-24
Proof-of-concept exploits (11)
- HORKimhab/CVE-2026-463002★ · 2026-05-14
- Sentebale/CVE-2026-463001★ · 2026-05-14
- 0xBlackash/CVE-2026-4630016★ · 2026-05-16
- ExploitEoom/CVE-2026-463000★ · 2026-05-17
- MadExploits/CVE-2026-463002★ · 2026-06-30
- Maxime288/Fragnesia-CVE-2026-463000★ · 2026-05-20
- AzDevops143/FRAGNESIA-Charan-cve-2026-463000★ · 2026-06-05
- nonameuserosint-hue/Fragnesia-go0★ · 2026-05-21
- 1neptune/Fragnesia1★ · 2026-06-03
- 0xdeadroot/fragnesia-python-exploit1★ · 2026-06-21
- enesbatursunger/exps0★ · 2026-08-26