CVE-2026-31419

HIGHPre-NVD 7.87.8—
EchelonGraph scoreMEDIUM confidence

Score 7.8 from GitHub Security Advisory (severity: HIGH) published 2026-04-13. NVD baseline CVSS 7.8; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, nvd
7.8
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS: 0%CVSS: 7.8Exploit: NoneExposed: 0

A fix is available — apply it.

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: 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)

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 ==================================================================

CVSS v3
7.8
EG Score
7.8(medium)
EPSS
2.6%
KEV
Not listed

Published

April 13, 2026

Last Modified

July 15, 2026

Advisory Details (4)

Auto-updated May 7, 2026
No patch confirmed yet.
generic

net: bonding: fix use-after-free in bond_xmit_broadcast() - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/f5b94654a4a19891a8108d66ef166de6c028c6cd
generic

net: bonding: fix use-after-free in bond_xmit_broadcast() - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/d4cc7e4c80b1634c7b1497574a2fdb18df6c026c
generic

net: bonding: fix use-after-free in bond_xmit_broadcast() - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/3453882f36c40d2339267093676585a89808a73d
generic

net: bonding: fix use-after-free in bond_xmit_broadcast() - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/2884bf72fb8f03409e423397319205de48adca16

Vendor Advisories for CVE-2026-31419(18)

These vendors published their own advisory mentioning this CVE — often with vendor-specific remediation steps + affected product lists not in NVD.

Patch Availability(26)

Vendor / EcosystemFixed in / PatchReleasedSource
ubuntulinux-tools-oracle-edge (6.17.0-1014.14~24.04.1) @ noble2026-06-14ubuntu
ubuntulinux-tools-lowlatency-hwe-20.04-edge (5.15.0.179.151) @ jammy2026-06-14ubuntu
ubuntulinux-tools-nvidia-tegra-rt-6.8 (6.8.0-1025.25) @ noble2026-06-14ubuntu
ubuntulinux-tools-gcp-64k-6.17 (6.17.0-1018.19) @ questing2026-06-14ubuntu
ubuntulinux-tools-azure-6.17 (6.17.0-1015.15) @ questing2026-06-14ubuntu
ubuntulinux-tools-intel-iot-realtime-5.15 (5.15.0.1100.104) @ jammy2026-06-14ubuntu
ubuntulinux-tools-azure-lts-24.04 (6.8.0-1056.62) @ noble2026-06-14ubuntu
ubuntulinux-tools-nvidia-hwe-22.04-edge (6.8.0-1054.57~22.04.1) @ jammy2026-06-14ubuntu
ubuntulinux-virtual-hwe-20.04-edge (5.15.0.179.163) @ jammy2026-06-14ubuntu
ubuntulinux-tools-nvidia-lowlatency-64k-6.8 (6.8.0-1054.57.1) @ noble2026-06-14ubuntu
ubuntulinux-tools-azure-fips-5.15 (5.15.0.1114.99) @ jammy2026-06-14ubuntu
ubuntulinux-tools-nvidia-tegra-igx-rt-5.15 (5.15.0.1049.51) @ jammy2026-06-14ubuntu
ubuntulinux-tools-gcp-edge (5.15.0.1108.117~20.04.1) @ focal2026-06-14ubuntu
ubuntulinux-virtual-hwe-24.04-edge (6.17.0-29.29) @ questing2026-06-14ubuntu
ubuntulinux-tools-lowlatency-hwe-20.04-edge (5.15.0.179.189~20.04.1) @ focal2026-06-14ubuntu
ubuntulinux-tools-azure-fips-6.8 (6.8.0-1059.65+fips1) @ noble2026-06-14ubuntu
ubuntulinux-virtual-6.8 (6.8.0-117.117) @ noble2026-06-14ubuntu
redhatkernel-0:5.14.0-687.15.1.el9_82026-06-11redhat
redhatkernel-0:6.12.0-211.22.1.el10_22026-06-11redhat
redhatkernel-0:5.14.0-570.119.1.el9_62026-06-04redhat
redhatkernel-rt-0:5.14.0-284.174.1.rt14.459.el9_22026-06-03redhat
redhatkernel-0:5.14.0-284.174.1.el9_22026-06-03redhat
redhatkernel-0:6.12.0-55.76.1.el10_02026-06-01redhat
redhatkernel-0:5.14.0-427.127.1.el9_42026-05-27redhat
redhatkernel-0:4.18.0-477.143.1.el8_82026-05-20redhat
redhatkernel-0:6.12.0-124.55.1.el10_12026-05-04redhat

Patches are aggregated from vendor advisories (Red Hat, Microsoft, Cisco, GitHub) and package ecosystems (OSV, GHSA). Multiple rows for the same upstream release have been deduplicated.

Weakness Classification(1)

MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.

Additional Vendor Advisories

(16)

Vendors that published advisories for this CVE beyond the curated set above. Broader coverage but minimal per-row detail — click through for the original advisory.

Data Freshness Timeline

(refreshed 10× in last 7d / 39× in last 30d)

Each row is a source pipeline that fetched or updated this CVE on that date, with what changed. For example, "NVD update" means NVD published or revised its analysis for this CVE; "MITRE cvelistV5" means we ingested or refreshed it from the CNA feed. Most recent first.

Showing the most recent 100 of 129 total refreshes for this CVE.

  1. 2026-07-15 16:57 UTCEPSS rescore
  2. 2026-07-15 16:57 UTCEPSS rescore
  3. 2026-07-15 02:00 UTCEPSS rescore
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  1. 2026-06-27 03:08 UTCEPSS rescore
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  6. 2026-06-21 14:56 UTCEPSS rescore
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  16. 2026-06-14 23:18 UTCEPSS rescore
  17. 2026-06-14 21:55 UTCEG score recompute
  18. 2026-06-14 21:55 UTCVendor advisory
  19. 2026-06-14 21:54 UTCGHSA enrichment
  20. 2026-06-13 23:00 UTCEPSS rescore
  21. 2026-06-12 23:12 UTCEPSS rescore
  22. 2026-06-12 23:12 UTCEPSS rescore
  23. 2026-06-12 06:47 UTCEG score recompute
  24. 2026-06-12 06:47 UTCVendor advisory
  25. 2026-06-12 06:46 UTCGHSA enrichment
  26. 2026-06-11 19:39 UTCEG score recompute
  27. 2026-06-11 19:39 UTCVendor advisory
  28. 2026-06-11 19:38 UTCGHSA enrichment
  29. 2026-06-11 14:00 UTCEPSS rescore
  30. 2026-06-10 22:58 UTCEG score recompute
  31. 2026-06-10 22:58 UTCVendor advisory
  32. 2026-06-10 22:58 UTCGHSA enrichment
  33. 2026-06-10 22:18 UTCEPSS rescore
  34. 2026-06-10 11:52 UTCEG score recompute
  35. 2026-06-10 11:52 UTCVendor advisory
  36. 2026-06-10 11:52 UTCGHSA enrichment
  37. 2026-06-10 00:46 UTCEG score recompute
  38. 2026-06-10 00:46 UTCVendor advisory
  39. 2026-06-10 00:46 UTCGHSA enrichment
  40. 2026-06-09 11:17 UTCEG score recompute
  41. 2026-06-09 11:17 UTCVendor advisory
  42. 2026-06-09 11:17 UTCGHSA enrichment
  43. 2026-06-08 14:17 UTCEPSS rescore
  44. 2026-06-08 14:17 UTCEPSS rescore
  45. 2026-06-08 05:49 UTCEG score recompute
  46. 2026-06-08 05:49 UTCVendor advisory
  47. 2026-06-08 05:49 UTCGHSA enrichment
  48. 2026-06-07 18:44 UTCEG score recompute
  49. 2026-06-07 18:44 UTCVendor advisory
  50. 2026-06-07 18:44 UTCGHSA enrichment
  51. 2026-06-07 15:25 UTCEPSS rescore
  52. 2026-06-07 15:25 UTCEPSS rescore
  53. 2026-06-07 15:25 UTCEPSS rescore
  54. 2026-06-07 07:25 UTCEG score recompute
  55. 2026-06-07 07:25 UTCVendor advisory
  56. 2026-06-07 07:24 UTCGHSA enrichment
  57. 2026-06-06 13:47 UTCEPSS rescore
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  67. 2026-06-02 19:25 UTCEG score recompute
  68. 2026-06-02 19:25 UTCVendor advisory
  69. 2026-06-02 19:24 UTCGHSA enrichment
  70. 2026-06-01 22:14 UTCEG score recompute
  71. 2026-06-01 22:14 UTCVendor advisory
  72. 2026-06-01 22:14 UTCGHSA enrichment
  73. 2026-06-01 13:51 UTCEPSS rescore
  74. 2026-06-01 13:51 UTCEPSS rescore
  75. 2026-05-31 22:30 UTCEPSS rescore

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Frequently asked(5)

What is CVE-2026-31419?
CVE-2026-31419 is a high vulnerability published on April 13, 2026. In the Linux kernel, the following vulnerability has been resolved: net: bonding: fix use-after-free in bondxmitbroadcast() bondxmitbroadcast() reuses the original skb for the last slave (determined by bondislast_slave()) and clones it for others. Concurrent slave enslave/release can mutate the…
When was CVE-2026-31419 disclosed?
CVE-2026-31419 was first published in the National Vulnerability Database on April 13, 2026, with the most recent update on July 15, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-31419 actively exploited?
CVE-2026-31419 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 2.6% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.
What is the CVSS score of CVE-2026-31419?
CVE-2026-31419 has a CVSS v3 base score of 7.8 (NVD).
How do I remediate CVE-2026-31419?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-31419, EchelonGraph cross-links them in the Vendor Advisories panel below — those typically contain the canonical remediation steps, fixed version numbers, and any vendor-specific mitigations.

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