CVE-2026-63993
🟠 Łataj w tym tygodniu
Użycie przestarzałego nagłówka IP w jądrze Linux po sprawdzeniu PMTU może prowadzić do użycia po zwolnieniu.
CVSS
9.8
EPSS
0.5%
Exploit
none
Vendor
linux
Opis źródłowy (NVD)
In the Linux kernel, the following vulnerability has been resolved: vxlan: do not reuse cached ip_hdr() value after skb_tunnel_check_pmtu() skb_tunnel_check_pmtu() can change skb->head. Reusing old_iph afer skb_tunnel_check_pmtu() can cause an UAF. Use instead ip_hdr(skb) as done in drivers/net/bareudp.c and drivers/net/geneve.c. Found by Sashiko.
brak
Brak patcha
Źródła i daty
| Źródło | Wartość |
|---|---|
| NVD – CVSS | 9.8 |
| CISA KEV (aktywnie wykorzystywane) | Nie |
| FIRST EPSS (prawdopodobieństwo exploita) | 0.5% |
| Opublikowano (NVD) | 2026-07-19 16:17:38 UTC |
| Ostatnia modyfikacja (NVD) | 2026-10-02 19:57:14 UTC |
Referencje
- https://git.kernel.org/stable/c/5303925e360527243b46a440a04667826bbc72b7 (416baaa9-dc9f-4396-8d5f-8c081fb06d67) [Patch]
- https://git.kernel.org/stable/c/609e63312c29aad18026a1d3222e123d4b6b0feb (416baaa9-dc9f-4396-8d5f-8c081fb06d67) [Patch]
- https://git.kernel.org/stable/c/6b8bfce9d2f774d2c2243e0248e03efb99bba6c0 (416baaa9-dc9f-4396-8d5f-8c081fb06d67) [Patch]
- https://git.kernel.org/stable/c/7d9ef0cb271555d8cf39fefe6c981e1493b25ecf (416baaa9-dc9f-4396-8d5f-8c081fb06d67) [Patch]
- https://git.kernel.org/stable/c/8d435d68d71fb875876b722f4136caf74f2f48bd (416baaa9-dc9f-4396-8d5f-8c081fb06d67) [Patch]
- https://git.kernel.org/stable/c/9257f56ac47ef1976bcd056cf986a9988eeec67a (416baaa9-dc9f-4396-8d5f-8c081fb06d67) [Patch]
- https://git.kernel.org/stable/c/a493efd4336cf19122ae0e4cbb3d31b32d70deea (416baaa9-dc9f-4396-8d5f-8c081fb06d67) [Patch]
- https://git.kernel.org/stable/c/dc3bfa050f873371e745bdf478b1f5b738e5733d (416baaa9-dc9f-4396-8d5f-8c081fb06d67) [Patch]