Answer in brief
CVE-2026-31419 records a High severity (CVSS 7.8) vulnerability in net: bonding: fix use-after-free in bond_xmit_broadcast(). The current sources do not mark it as known exploited. The current feed maps Red Hat/kernel-rt (generic), Linux/Linux (generic), Linux/Linux (generic), Linux/Linux (generic) and additional mapped packages. Check affected ranges and fixed versions before updating.
Analysis pending evidence review
HOL Guard separates source facts from reviewed analysis. See the methodology.
CVSS is 7.8. The current sources do not mark it as known exploited. Treat this as a source-backed prioritization signal, not a statement about your environment.
Analysis status
Analysis pending evidence review
Factual feed record only; HOL analysis is not approved for indexing. Read the methodology.
The current feed maps Red Hat/kernel-rt (generic), Linux/Linux (generic), Linux/Linux (generic), Linux/Linux (generic) and additional mapped packages. Check affected ranges and fixed versions before updating.
| Product | Affected versions | Fixed versions |
|---|---|---|
| cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* | Not reported | Not reported |
| cpe:2.3:o:linux:linux_kernel:7.0:rc1:*:*:*:*:*:* | Not reported | Not reported |
| cpe:2.3:o:linux:linux_kernel:7.0:rc2:*:*:*:*:*:* | Not reported | Not reported |
| cpe:2.3:o:linux:linux_kernel:7.0:rc3:*:*:*:*:*:* | Not reported | Not reported |
| cpe:2.3:o:linux:linux_kernel:7.0:rc4:*:*:*:*:*:* | Not reported | Not reported |
| cpe:2.3:o:linux:linux_kernel:7.0:rc5:*:*:*:*:*:* | Not reported | Not reported |
| cpe:2.3:o:linux:linux_kernel:7.0:rc6:*:*:*:*:*:* | Not reported | Not reported |
| Package | Affected range | Fixed version |
|---|---|---|
| Red Hat/kernel-rtgeneric | * | Not reported |
| Linux/Linuxgeneric | >=4e5bd03ae34652cd932ab4c91c71c511793df75c <2de5c8eea0a9db99dae7c36f4b541b74b41d3a04 || >=4e5bd03ae34652cd932ab4c91c71c511793df75c <a0f661918edc79d7a75e468128af8d41e2a1a83a || >=4e5bd03ae34652cd932ab4c91c71c511793df75c <d4cc7e4c80b1634c7b1497574a2fdb18df6c026c || >=4e5bd03ae34652cd932ab4c91c71c511793df75c <f5b94654a4a19891a8108d66ef166de6c028c6cd || >=4e5bd03ae34652cd932ab4c91c71c511793df75c <2884bf72fb8f03409e423397319205de48adca16 || 20949c3816463e97c6f8fe84c0280c7e5ae83a8d || f1d206181f19b00b275b258fea1418718a2f4173 || c1f1691ef84fa6d38fa5e5148eca073145e97ffa || >=5.10.94 <5.11 || >=5.15.17 <5.16 || >=5.16.3 <5.17 | 2de5c8eea0a9db99dae7c36f4b541b74b41d3a04, a0f661918edc79d7a75e468128af8d41e2a1a83a, d4cc7e4c80b1634c7b1497574a2fdb18df6c026c, f5b94654a4a19891a8108d66ef166de6c028c6cd, 2884bf72fb8f03409e423397319205de48adca16, 5.11, 5.16, 5.17 |
| Linux/Linuxgeneric | 5.17 | Not reported |
| Linux/Linuxgeneric | >=4e5bd03ae34652cd932ab4c91c71c511793df75c <00752893f96b344f258c9c6de18b33171ac4872c || >=4e5bd03ae34652cd932ab4c91c71c511793df75c <2de5c8eea0a9db99dae7c36f4b541b74b41d3a04 || >=4e5bd03ae34652cd932ab4c91c71c511793df75c <a0f661918edc79d7a75e468128af8d41e2a1a83a || >=4e5bd03ae34652cd932ab4c91c71c511793df75c <d4cc7e4c80b1634c7b1497574a2fdb18df6c026c || >=4e5bd03ae34652cd932ab4c91c71c511793df75c <f5b94654a4a19891a8108d66ef166de6c028c6cd || >=4e5bd03ae34652cd932ab4c91c71c511793df75c <2884bf72fb8f03409e423397319205de48adca16 || 20949c3816463e97c6f8fe84c0280c7e5ae83a8d || f1d206181f19b00b275b258fea1418718a2f4173 || c1f1691ef84fa6d38fa5e5148eca073145e97ffa || >=5.10.94 <5.11 || >=5.15.17 <5.16 || >=5.16.3 <5.17 | 00752893f96b344f258c9c6de18b33171ac4872c, 2de5c8eea0a9db99dae7c36f4b541b74b41d3a04, a0f661918edc79d7a75e468128af8d41e2a1a83a, d4cc7e4c80b1634c7b1497574a2fdb18df6c026c, f5b94654a4a19891a8108d66ef166de6c028c6cd, 2884bf72fb8f03409e423397319205de48adca16, 5.11, 5.16, 5.17 |
| Linux/Linuxgeneric | >=20949c3816463e97c6f8fe84c0280c7e5ae83a8d <060d83bb6147c36fc21134d5b332d266b8c176bc || >=f1d206181f19b00b275b258fea1418718a2f4173 <df690112b2172e8eb0f4dd8ec1019b65ee979203 || >=4e5bd03ae34652cd932ab4c91c71c511793df75c <00752893f96b344f258c9c6de18b33171ac4872c || >=4e5bd03ae34652cd932ab4c91c71c511793df75c <2de5c8eea0a9db99dae7c36f4b541b74b41d3a04 || >=4e5bd03ae34652cd932ab4c91c71c511793df75c <a0f661918edc79d7a75e468128af8d41e2a1a83a || >=4e5bd03ae34652cd932ab4c91c71c511793df75c <d4cc7e4c80b1634c7b1497574a2fdb18df6c026c || >=4e5bd03ae34652cd932ab4c91c71c511793df75c <f5b94654a4a19891a8108d66ef166de6c028c6cd || >=4e5bd03ae34652cd932ab4c91c71c511793df75c <2884bf72fb8f03409e423397319205de48adca16 || c1f1691ef84fa6d38fa5e5148eca073145e97ffa || >=5.10.94 <5.10.273 || >=5.15.17 <5.15.224 || >=5.16.3 <5.17 | 060d83bb6147c36fc21134d5b332d266b8c176bc, df690112b2172e8eb0f4dd8ec1019b65ee979203, 00752893f96b344f258c9c6de18b33171ac4872c, 2de5c8eea0a9db99dae7c36f4b541b74b41d3a04, a0f661918edc79d7a75e468128af8d41e2a1a83a, d4cc7e4c80b1634c7b1497574a2fdb18df6c026c, f5b94654a4a19891a8108d66ef166de6c028c6cd, 2884bf72fb8f03409e423397319205de48adca16, 5.10.273, 5.15.224, 5.17 |
Published upstream
Apr 13, 2026
Evidence: source:cvelist:source_dates:source-dates:recordSource modified
Oct 30, 2026
Evidence: source:cvelist:source_dates:source-dates:recordFirst seen by HOL
Jun 19, 2026
In the Linux kernel, the following vulnerability has been resolved: net: bonding: fix use-after-free in bond_xmit_broadcast() bond_xmit_broadcast() reuses the original skb for the last slave (determined by bond_is_last_slave()) and clones it for others. Concurrent slave enslave/release can mutate the slave list during RCU-protected iteration, changing which slave is "last" mid-loop. This causes the original skb to be double-consumed (double-freed). Replace the racy bond_is_last_slave() check with a simple index comparison (i + 1 == slaves_count) against the pre-snapshot slave count taken via READ_ONCE() before the loop. This preserves the zero-copy optimization for the last slave while making the "last" determination stable against concurrent list mutations. The UAF can trigger the following crash: ================================================================== BUG: KASAN: slab-use-after-free in skb_clone Read of size 8 at addr ffff888100ef8d40 by task exploit/147 CPU: 1 UID: 0 PID: 147 Comm: exploit Not tainted 7.0.0-rc3+ #4 PREEMPTLAZY Call Trace: <TASK> dump_stack_lvl (lib/dump_stack.c:123) print_report (mm/kasan/report.c:379 mm/kasan/report.c:482) kasan_report (mm/kasan/report.c:597) skb_clone (include/linux/skbuff.h:1724 include/linux/skbuff.h:1792 include/linux/skbuff.h:3396 net/core/skbuff.c:2108) bond_xmit_broadcast (drivers/net/bonding/bond_main.c:5334) bond_start_xmit (drivers/net/bonding/bond_main.c:5567 drivers/net/bonding/bond_main.c:5593) dev_hard_start_xmit (include/linux/netdevice.h:5325 include/linux/netdevice.h:5334 net/core/dev.c:3871 net/core/dev.c:3887) __dev_queue_xmit (include/linux/netdevice.h:3601 net/core/dev.c:4838) ip6_finish_output2 (include/net/neighbour.h:540 include/net/neighbour.h:554 net/ipv6/ip6_output.c:136) ip6_finish_output (net/ipv6/ip6_output.c:208 net/ipv6/ip6_output.c:219) ip6_output (net/ipv6/ip6_output.c:250) ip6_send_skb (net/ipv6/ip6_output.c:1985) udp_v6_send_skb (net/ipv6/udp.c:1442) udpv6_sendmsg (net/ipv6/udp.c:1733) __sys_sendto (net/socket.c:730 net/socket.c:742 net/socket.c:2206) __x64_sys_sendto (net/socket.c:2209) do_syscall_64 (arch/x86/entry/syscall_64.c:63 arch/x86/entry/syscall_64.c:94) entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:130) </TASK> Allocated by task 147: Freed by task 147: The buggy address belongs to the object at ffff888100ef8c80 which belongs to the cache skbuff_head_cache of size 224 The buggy address is located 192 bytes inside of freed 224-byte region [ffff888100ef8c80, ffff888100ef8d60) Memory state around the buggy address: ffff888100ef8c00: fb fb fb fb fc fc fc fc fc fc fc fc fc fc fc fc ffff888100ef8c80: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb >ffff888100ef8d00: fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc ^ ffff888100ef8d80: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb ffff888100ef8e00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ==================================================================
Quoted source text, attributed separately from HOL analysis.