UBUNTU-CVE-2026-43500
In the Linux kernel, the following vulnerability has been resolved: rxrpc: Also unshare DATA/RESPONSE packets when paged frags are present The DATA-packet handler in rxrpc_input_call_event() and the RESPONSE handler in rxrpc_verify_response() copy the skb to a linear one before calling into the security ops only when skb_cloned() is true. An skb that is not cloned but still carries externally-owned paged fragments (e.g. SKBFL_SHARED_FRAG set by splice() into a UDP socket via __ip_append_data, or a chained skb_has_frag_list()) falls through to the in-place decryption path, which binds the frag pages directly into the AEAD/skcipher SGL via skb_to_sgvec(). Extend the gate to also unshare when skb_has_frag_list() or skb_has_shared_frag() is true. This catches the splice-loopback vector and other externally-shared frag sources while preserving the zero-copy fast path for skbs whose frags are kernel-private (e.g. NIC page_pool RX, GRO). The OOM/trace handling already in place is reused.
02 / AFFECTED SOFTWARE
Affected packages
11 explicit affected versions
6 explicit affected versions
51 explicit affected versions
114 explicit affected versions
85 explicit affected versions
50 explicit affected versions
6 explicit affected versions
12 explicit affected versions
19 explicit affected versions
10 explicit affected versions
6 explicit affected versions
95 explicit affected versions
24 explicit affected versions
1 explicit affected versions
80 explicit affected versions
81 explicit affected versions
89 explicit affected versions
82 explicit affected versions
74 explicit affected versions
10 explicit affected versions
35 explicit affected versions
26 explicit affected versions
87 explicit affected versions
7 explicit affected versions
82 explicit affected versions
38 explicit affected versions
13 explicit affected versions
42 explicit affected versions
35 explicit affected versions
1 explicit affected versions
47 explicit affected versions
45 explicit affected versions
18 explicit affected versions
38 explicit affected versions
64 explicit affected versions
43 explicit affected versions
118 explicit affected versions
13 explicit affected versions
4 explicit affected versions
23 explicit affected versions
50 explicit affected versions
122 explicit affected versions
1 explicit affected versions
21 explicit affected versions
9 explicit affected versions
16 explicit affected versions
10 explicit affected versions
18 explicit affected versions
74 explicit affected versions
5 explicit affected versions
46 explicit affected versions
8 explicit affected versions
7 explicit affected versions
12 explicit affected versions
11 explicit affected versions
7 explicit affected versions
12 explicit affected versions
14 explicit affected versions
10 explicit affected versions
1 explicit affected versions
7 explicit affected versions
15 explicit affected versions
102 explicit affected versions
12 explicit affected versions
6 explicit affected versions
103 explicit affected versions
12 explicit affected versions
39 explicit affected versions
7 explicit affected versions
7 explicit affected versions
41 explicit affected versions
16 explicit affected versions
4 explicit affected versions
15 explicit affected versions
25 explicit affected versions
32 explicit affected versions
10 explicit affected versions
37 explicit affected versions
10 explicit affected versions
7 explicit affected versions
13 explicit affected versions
38 explicit affected versions
3 explicit affected versions
10 explicit affected versions
11 explicit affected versions
63 explicit affected versions
1 explicit affected versions
26 explicit affected versions
8 explicit affected versions
13 explicit affected versions
33 explicit affected versions
29 explicit affected versions
109 explicit affected versions
13 explicit affected versions
12 explicit affected versions
93 explicit affected versions
39 explicit affected versions
38 explicit affected versions
6 explicit affected versions
98 explicit affected versions
87 explicit affected versions
50 explicit affected versions
33 explicit affected versions
23 explicit affected versions
56 explicit affected versions
10 explicit affected versions
18 explicit affected versions
17 explicit affected versions
11 explicit affected versions
5 explicit affected versions
12 explicit affected versions
7 explicit affected versions
7 explicit affected versions
12 explicit affected versions
6 explicit affected versions
13 explicit affected versions
15 explicit affected versions
5 explicit affected versions
72 explicit affected versions
88 explicit affected versions
10 explicit affected versions
26 explicit affected versions
36 explicit affected versions
1 explicit affected versions
64 explicit affected versions
33 explicit affected versions
45 explicit affected versions
11 explicit affected versions
7 explicit affected versions
13 explicit affected versions
44 explicit affected versions
77 explicit affected versions
16 explicit affected versions
86 explicit affected versions
48 explicit affected versions
8 explicit affected versions
3 explicit affected versions
130 explicit affected versions
1 explicit affected versions
7 explicit affected versions
2 explicit affected versions
13 explicit affected versions
51 explicit affected versions
14 explicit affected versions
18 explicit affected versions
40 explicit affected versions
12 explicit affected versions
68 explicit affected versions
75 explicit affected versions
4 explicit affected versions
27 explicit affected versions
61 explicit affected versions
119 explicit affected versions
6 explicit affected versions
1 explicit affected versions
41 explicit affected versions
8 explicit affected versions
52 explicit affected versions
5 explicit affected versions
8 explicit affected versions
4 explicit affected versions
1 explicit affected versions
10 explicit affected versions
7 explicit affected versions
44 explicit affected versions
13 explicit affected versions
108 explicit affected versions
13 explicit affected versions
70 explicit affected versions
7 explicit affected versions
8 explicit affected versions
10 explicit affected versions
12 explicit affected versions
9 explicit affected versions
34 explicit affected versions
106 explicit affected versions
78 explicit affected versions
54 explicit affected versions
44 explicit affected versions
16 explicit affected versions
3 explicit affected versions
13 explicit affected versions
26 explicit affected versions
45 explicit affected versions
37 explicit affected versions
49 explicit affected versions
14 explicit affected versions
38 explicit affected versions
9 explicit affected versions
15 explicit affected versions
11 explicit affected versions
37 explicit affected versions
17 explicit affected versions
12 explicit affected versions
88 explicit affected versions
8 explicit affected versions
7 explicit affected versions
4 explicit affected versions
77 explicit affected versions
5 explicit affected versions
1 explicit affected versions
1 explicit affected versions
1 explicit affected versions
86 explicit affected versions
76 explicit affected versions
76 explicit affected versions
5 explicit affected versions
13 explicit affected versions
43 explicit affected versions
75 explicit affected versions
11 explicit affected versions
117 explicit affected versions
10 explicit affected versions
8 explicit affected versions
43 explicit affected versions
87 explicit affected versions
14 explicit affected versions
4 explicit affected versions
78 explicit affected versions
12 explicit affected versions
11 explicit affected versions
1 explicit affected versions
121 explicit affected versions
17 explicit affected versions
2 explicit affected versions
37 explicit affected versions
75 explicit affected versions
03 / CONNECTIONS
Connected vulnerabilities
04 / EVIDENCE
Source records
In the Linux kernel, the following vulnerability has been resolved: rxrpc: Also unshare DATA/RESPONSE packets when paged frags are present The DATA-packet handler in rxrpc_input_call_event() and the RESPONSE handler in rxrpc_verify_response() copy the skb to a linear one before calling into the security ops only when skb_cloned() is true. An skb that is not cloned but still carries externally-owned paged fragments (e.g. SKBFL_SHARED_FRAG set by splice() into a UDP socket via __ip_append_data, or a chained skb_has_frag_list()) falls through to the in-place decryption path, which binds the frag pages directly into the AEAD/skcipher SGL via skb_to_sgvec(). Extend the gate to also unshare when skb_has_frag_list() or skb_has_shared_frag() is true. This catches the splice-loopback vector and other externally-shared frag sources while preserving the zero-copy fast path for skbs whose frags are kernel-private (e.g. NIC page_pool RX, GRO). The OOM/trace handling already in place is reused.
05 / REFERENCES
Further evidence
- https://github.com/V4bel/dirtyfrag
- https://lore.kernel.org/all/afKV2zGR6rrelPC7@v4bel/
- https://ubuntu.com/blog/dirty-frag-linux-vulnerability-fixes-available
- https://ubuntu.com/security/CVE-2026-43500
- https://ubuntu.com/security/notices/USN-8370-1
- https://ubuntu.com/security/notices/USN-8371-1
- https://ubuntu.com/security/notices/USN-8373-1
- https://ubuntu.com/security/notices/USN-8374-1
- https://ubuntu.com/security/notices/USN-8388-1
- https://ubuntu.com/security/notices/USN-8388-2
- https://ubuntu.com/security/notices/USN-8389-1
- https://ubuntu.com/security/notices/USN-8391-1
- https://ubuntu.com/security/notices/USN-8392-1
- https://ubuntu.com/security/notices/USN-8393-1
- https://ubuntu.com/security/notices/USN-8426-1
- https://ubuntu.com/security/notices/USN-8426-2
- https://ubuntu.com/security/notices/USN-8440-1
- https://ubuntu.com/security/notices/USN-8461-1
- https://ubuntu.com/security/notices/USN-8462-1
- https://ubuntu.com/security/notices/USN-8489-1
- https://ubuntu.com/security/notices/USN-8497-1
- https://ubuntu.com/security/notices/USN-8499-1
- https://ubuntu.com/security/notices/USN-8528-1
- https://ubuntu.com/security/notices/USN-8569-1
- https://ubuntu.com/security/notices/USN-8616-1
- https://www.cve.org/CVERecord?id=CVE-2026-43500
- https://www.openwall.com/lists/oss-security/2026/05/07/8
- https://www.openwall.com/lists/oss-security/2026/05/08/8