CVE-2026-31419

HIGHPre-NVD 7.87.8
EchelonGraph scoreMEDIUM confidence

“—” beside the score: it is equal to the CVSS score beside it.

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

Triggered by: GitHub Security Advisory CVSS
Sources: EPSS, GitHub Security Advisory, a secondary CVSS source
7.8EG
EchelonGraph verdictPlan a fixRemediate within your standard update timelines (the SSVC decision on this page).
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 0.2%CVSS: 7.8Exploit: None knownExposed services: Not assessed

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
7.8HIGHmedium confidence
EG Risk
35
EG Risk 35/100

EG Risk is EchelonGraph's 0–100 priority score: it fuses intrinsic severity with real-world exploitation and automatability so you can rank equal-severity CVEs and fix the most dangerous first. Higher = act sooner. Distinct from the 0–10 EG Score (severity).

How it’s computed (value × EchelonGraph’s weight)
Severity78% × 45%
The EG Score, 7.8 of 10.
Exploitation0.2% × 40%
FIRST EPSS: the 30-day exploitation probability when EchelonGraph scored this CVE.
Automatability0% × 15%
CISA's BOD 26-04 default: no one has published Automatable for this CVE, and CISA treats it as “no” for a CVE not in KEV.
SSVC (CISA's decision table, applied by EchelonGraph): Track at low or medium mission impact; Track* at high (mission-essential systems).
Exploitation none (no CISA value, KEV listing or exploit code on record) · Automatable no (CISA's BOD 26-04 default) · Technical impact total (CISA's BOD 26-04 default). EchelonGraph holds no SSVC assessment of this CVE from CISA: none of these inputs is from Vulnrichment. EchelonGraph applied CISA's decision table to them; CISA publishes SSVC inputs and the table, not a decision for each CVE.
Action: A fix is available. Apply it within your standard update timelines.
EPSS PROB
0.2%
EPSS %ILE
7th
KEV
Not listed

SSVC (CISA's decision table, applied by EchelonGraph)Track at low or medium mission impact; Track* at high (mission-essential systems).

A fix is available. Apply it within your standard update timelines.

Exploitation none (no CISA value, KEV listing or exploit code on record) · Automatable no (CISA's BOD 26-04 default) · Technical impact total (CISA's BOD 26-04 default). EchelonGraph holds no SSVC assessment of this CVE from CISA: none of these inputs is from Vulnrichment. EchelonGraph applied CISA's decision table to them; CISA publishes SSVC inputs and the table, not a decision for each CVE. Mission impact is CISA's Mission & Well-being decision point, and only you can judge it. CISA's table makes it high when Mission Prevalence is Essential — the vulnerable component "directly provides capabilities that constitute at least one MEF for at least one entity" (MEF: mission essential function) — or when Public Well-Being Impact is Irreversible: "multiple fatalities are likely", the cyber-physical system "is likely lost or destroyed", "extreme or serious externalities" are imposed on other parties, or social systems such as elections or the financial grid "are destabilized and potentially collapse". CISA's decision table

BOD 26-04 (CISA's remediation timeline, Table 1)14 days if the affected system is publicly exposed; Fix on system upgrade if it is not.

In CISA KEV no (CISA's KEV catalog) · Automatable no (CISA's BOD 26-04 default) · Technical impact total (CISA's BOD 26-04 default). Where an input reads “CISA's BOD 26-04 default”, no one has published it for this CVE, and CISA's implementation guidance says: “If “Automatable” and “Technical Impact” information items about a CVE ID are not available and the CVE ID is not in the KEV Catalog, CISA will treat its values as “no” and “total,” respectively, until CISA or a third party provides metadata about the CVE ID. CISA will always provide the Vulnrichment data for a CVE ID listed in the KEV Catalog.” Whether your system is publicly exposed is yours to answer. BOD 26-04 binds US Federal Civilian Executive Branch agencies; for anyone else it is CISA's published timeline, a reference rather than an obligation. The directive · how EchelonGraph applies it

Published

April 13, 2026

Last Modified

August 23, 2026

Advisory Details (4)

Auto-updated May 7, 2026
Patch available.
Web page

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
Web page

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
Web page

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
Web page

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

Patch Availability(26)

Vendor / EcosystemFix (by version range) / PatchReleasedSource
ubuntulinux-tools-lowlatency-hwe-20.04-edge (5.15.0.179.189~20.04.1) @ focal2026-08-23ubuntu
ubuntulinux-tools-nvidia-tegra-igx-rt-5.15 (5.15.0.1049.51) @ jammy2026-08-23ubuntu
ubuntulinux-tools-nvidia-hwe-22.04-edge (6.8.0-1054.57~22.04.1) @ jammy2026-08-23ubuntu
ubuntulinux-tools-azure-lts-24.04 (6.8.0-1056.62) @ noble2026-08-23ubuntu
ubuntulinux-tools-azure-6.17 (6.17.0-1015.15) @ questing2026-08-23ubuntu
ubuntulinux-tools-nvidia-tegra-rt-6.8 (6.8.0-1025.25) @ noble2026-08-23ubuntu
ubuntulinux-tools-lowlatency-hwe-20.04-edge (5.15.0.179.151) @ jammy2026-08-23ubuntu
ubuntulinux-tools-gcp-64k-6.17 (6.17.0-1018.19) @ questing2026-08-23ubuntu
ubuntulinux-tools-azure-fips-6.8 (6.8.0-1059.65+fips1) @ noble2026-08-23ubuntu
ubuntulinux-tools-azure-fips-5.15 (5.15.0.1114.99) @ jammy2026-08-23ubuntu
ubuntulinux-tools-azure-lts-22.04 (5.15.0.1114.112) @ jammy2026-08-23ubuntu
ubuntulinux-tools-azure-edge (6.8.0-1059.65~22.04.1) @ jammy2026-08-23ubuntu
redhatkpatch-patch2026-07-08redhat
redhatkernel-0:4.18.0-553.136.1.el8_102026-06-19redhat
redhatkernel-rt-0:4.18.0-553.136.1.rt7.477.el8_102026-06-19redhat
redhatkernel-0:6.12.0-211.22.1.el10_22026-06-11redhat
redhatkernel-0:5.14.0-687.15.1.el9_82026-06-11redhat
redhatkernel-0:5.14.0-570.119.1.el9_62026-06-04redhat
redhatkernel-0:5.14.0-284.174.1.el9_22026-06-03redhat
redhatkernel-rt-0:5.14.0-284.174.1.rt14.459.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
linuxKernel @ 6.1.184 (fixes >=5.17.0)—osv
linuxKernel @ 6.6.143 (fixes >=5.17.0)—osv

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.

Affected Packages

(4 across 4 ecosystems)
Debian:11(1)
PackageVulnerable rangeFix by version rangeDependents
linux5.10.103-1 ... 7.2~rc5-1~exp1 (496 versions)
  • every version on: no fix on record
—
Debian:12(1)
PackageVulnerable rangeFix by version rangeDependents
linux6.1.106-1 ... 6.1.99-1 (56 versions)
  • every version up to 6.1.187-1: fixed in 6.1.187-1
—
Debian:13(1)
PackageVulnerable rangeFix by version rangeDependents
linux6.12.38-1 ... 6.12.95-1~bpo12+1 (29 versions)
  • every version up to 6.12.95-1: fixed in 6.12.95-1
—
Debian:14(1)
PackageVulnerable rangeFix by version rangeDependents
linux6.12.100-1 ... 6.19~rc8-1~exp1 (126 versions)
  • every version up to 6.19.12-1: fixed in 6.19.12-1
—

Weakness Classification(1)

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

Additional Vendor Advisories

(9)

Data Freshness Timeline

(refreshed 11× in last 7d / 27× in last 30d)

Each row is a time one of our pipelines fetched, updated or re-scored this CVE. 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. An arrow marks a change the record states ("CVSS v3 → 9.1"); EPSS and GHSA rows show the values recorded at that time, not what changed (EPSS values are rounded; hover one for the exact figures). Most recent first.

Showing the most recent 95 of 257 refreshes on record for this CVE.

A repeat, a row identical to one the same pipeline wrote less than 10 seconds earlier, is not a separate refresh and is not counted. 5 repeat rows among the latest 100 are merged into the row they repeat. The 162 oldest rows on record are not shown and were not checked, so the counts can still include repeats.

  1. 2026-10-14 16:32 UTCEPSS rescoreEPSS 0.2% · 7th percentile
  2. 2026-10-13 16:34 UTCEPSS rescoreEPSS 0.2% · 7th percentile
  3. 2026-10-12 16:34 UTCEPSS rescoreEPSS 0.2% · 7th percentile
  4. 2026-10-12 16:15 UTCEG score recompute
  5. 2026-10-11 19:57 UTCEG score recompute
  6. 2026-10-11 17:11 UTCEG score recompute
  7. 2026-10-11 14:39 UTCEG score recompute
  8. 2026-10-11 13:48 UTCEPSS rescoreEPSS 0.2% · 7th percentile
  9. 2026-10-10 20:00 UTCEPSS rescoreEPSS 0.2% · 7th percentile
  10. 2026-10-09 20:07 UTCEPSS rescoreEPSS 0.2% · 7th percentile
  11. 2026-10-08 17:12 UTCEPSS rescoreEPSS 0.2% · 7th percentile
  12. 2026-10-07 23:47 UTCEPSS rescoreEPSS 0.2% · 7th percentile
  13. 2026-10-06 15:17 UTCEPSS rescoreEPSS 0.2% · 7th percentile
  14. 2026-10-05 17:42 UTCEPSS rescoreEPSS 0.2% · 7th percentile
  15. 2026-10-04 23:22 UTCEPSS rescoreEPSS 0.2% · 6th percentile
  16. 2026-10-03 14:25 UTCEPSS rescoreEPSS 0.2% · 6th percentile
  17. 2026-10-01 19:49 UTCEPSS rescoreEPSS 0.2% · 6th percentile
  18. 2026-09-30 15:03 UTCEPSS rescoreEPSS 0.2% · 6th percentile
  19. 2026-09-29 23:11 UTCOSV refresh
  20. 2026-09-28 13:51 UTCEPSS rescoreEPSS 0.2% · 6th percentile
  21. 2026-09-26 15:58 UTCEPSS rescoreEPSS 0.2% · 6th percentile
  22. 2026-09-26 00:26 UTCEPSS rescoreEPSS 0.2% · 6th percentile
  23. 2026-09-20 20:15 UTCEPSS rescoreEPSS 0.1% · 2nd percentile
  24. 2026-09-18 19:27 UTCEPSS rescoreEPSS 0.1% · 2nd percentile
  25. 2026-09-17 19:30 UTCEPSS rescoreEPSS 0.1% · 2nd percentile
Show 70 more
  1. 2026-09-16 14:08 UTCEPSS rescoreEPSS 0.1% · 2nd percentile
  2. 2026-09-16 05:15 UTCEPSS rescoreEPSS 0.1% · 2nd percentile
  3. 2026-09-13 16:47 UTCEPSS rescoreEPSS 0.1% · 2nd percentile
  4. 2026-09-12 15:01 UTCEPSS rescoreEPSS 0.1% · 2nd percentile
  5. 2026-09-11 14:52 UTCEPSS rescoreEPSS 0.1% · 2nd percentile
  6. 2026-09-10 20:23 UTCOSV refresh
  7. 2026-09-10 09:34 UTCEPSS rescoreEPSS 0.1% · 2nd percentile
  8. 2026-09-08 22:00 UTCEPSS rescoreEPSS 0.1% · 2nd percentile
  9. 2026-09-07 16:01 UTCEPSS rescoreEPSS 0.1% · 2nd percentile
  10. 2026-09-06 13:47 UTCEPSS rescoreEPSS 0.1% · 2nd percentile
  11. 2026-09-04 05:06 UTCEPSS rescoreEPSS 0.1% · 2nd percentile
  12. 2026-09-01 13:53 UTCEPSS rescoreEPSS 0.1% · 2nd percentile
  13. 2026-09-01 04:39 UTCEPSS rescoreEPSS 0.1% · 2nd percentile
  14. 2026-08-30 19:17 UTCEPSS rescoreEPSS 0.1% · 2nd percentile
  15. 2026-08-30 01:22 UTCEPSS rescoreEPSS 0.1% · 2nd percentile
  16. 2026-08-28 21:41 UTCEPSS rescoreEPSS 0.1% · 2nd percentile
  17. 2026-08-27 14:25 UTCEPSS rescoreEPSS 0.1% · 2nd percentile
  18. 2026-08-25 13:49 UTCEPSS rescoreEPSS 0.1% · 2nd percentile
  19. 2026-08-24 14:17 UTCEPSS rescoreEPSS 0.1% · 2nd percentile
  20. 2026-08-23 13:21 UTCEG score recompute
  21. 2026-08-23 13:21 UTCVendor advisory
  22. 2026-08-23 13:21 UTCGHSA enrichmentGHSA-47j5-hmhq-4c74 · GitHub severity HIGH · GitHub CVSS 7.8
  23. 2026-08-23 13:09 UTCEG score recompute
  24. 2026-08-23 13:09 UTCVendor advisory
  25. 2026-08-23 13:09 UTCGHSA enrichmentGHSA-47j5-hmhq-4c74 · GitHub severity HIGH · GitHub CVSS 7.8
  26. 2026-08-23 00:19 UTCEPSS rescoreEPSS 0.1% · 2nd percentile
  27. 2026-08-21 23:49 UTCEPSS rescoreEPSS 0.1% · 2nd percentile
  28. 2026-08-20 22:55 UTCEPSS rescoreEPSS 0.1% · 2nd percentile
  29. 2026-08-19 17:03 UTCEPSS rescoreEPSS 0.1% · 2nd percentile
  30. 2026-08-18 13:48 UTCEPSS rescoreEPSS 0.1% · 2nd percentile
  31. 2026-08-17 13:47 UTCEPSS rescoreEPSS 0.1% · 2nd percentile
  32. 2026-08-16 14:56 UTCEPSS rescoreEPSS 0.1% · 2nd percentile
  33. 2026-08-16 06:55 UTCEG score recompute
  34. 2026-08-16 06:55 UTCVendor advisory
  35. 2026-08-16 06:55 UTCGHSA enrichmentGHSA-47j5-hmhq-4c74 · GitHub severity HIGH · GitHub CVSS 7.8
  36. 2026-08-16 02:14 UTCEPSS rescoreEPSS 0.1% · 2nd percentile
  37. 2026-08-15 01:30 UTCEPSS rescoreEPSS 0.1% · 2nd percentile
  38. 2026-08-14 16:02 UTCVendor advisory
  39. 2026-08-14 16:02 UTCGHSA enrichmentGHSA-47j5-hmhq-4c74 · GitHub severity HIGH · GitHub CVSS 7.8
  40. 2026-08-14 04:56 UTCEG score recompute
  41. 2026-08-14 04:56 UTCVendor advisory
  42. 2026-08-14 04:56 UTCGHSA enrichmentGHSA-47j5-hmhq-4c74 · GitHub severity HIGH · GitHub CVSS 7.8
  43. 2026-08-13 22:00 UTCEPSS rescoreEPSS 0.1% · 2nd percentile
  44. 2026-08-13 09:15 UTCVendor advisory
  45. 2026-08-13 09:15 UTCGHSA enrichmentGHSA-47j5-hmhq-4c74 · GitHub severity HIGH · GitHub CVSS 7.8
  46. 2026-08-12 19:10 UTCEG score recompute
  47. 2026-08-12 19:10 UTCVendor advisory
  48. 2026-08-12 19:10 UTCGHSA enrichmentGHSA-47j5-hmhq-4c74 · GitHub severity HIGH · GitHub CVSS 7.8
  49. 2026-08-12 13:50 UTCEPSS rescoreEPSS 0.1% · 2nd percentile
  50. 2026-08-11 19:17 UTCEG score recompute
  51. 2026-08-11 19:17 UTCVendor advisory
  52. 2026-08-11 19:17 UTCGHSA enrichmentGHSA-47j5-hmhq-4c74 · GitHub severity HIGH · GitHub CVSS 7.8
  53. 2026-08-11 02:52 UTCEG score recompute
  54. 2026-08-11 02:52 UTCVendor advisory
  55. 2026-08-11 02:52 UTCGHSA enrichmentGHSA-47j5-hmhq-4c74 · GitHub severity HIGH · GitHub CVSS 7.8
  56. 2026-08-11 00:00 UTCEPSS rescoreEPSS 0.1% · 2nd percentile
  57. 2026-08-10 02:32 UTCVendor advisory
  58. 2026-08-10 02:32 UTCGHSA enrichmentGHSA-47j5-hmhq-4c74 · GitHub severity HIGH · GitHub CVSS 7.8
  59. 2026-08-09 15:26 UTCEG score recompute
  60. 2026-08-09 15:26 UTCVendor advisory
  61. 2026-08-09 15:26 UTCGHSA enrichmentGHSA-47j5-hmhq-4c74 · GitHub severity HIGH · GitHub CVSS 7.8
  62. 2026-08-09 13:46 UTCEPSS rescoreEPSS 0.1% · 2nd percentile
  63. 2026-08-09 04:20 UTCEG score recompute
  64. 2026-08-09 04:20 UTCVendor advisory
  65. 2026-08-09 04:20 UTCGHSA enrichmentGHSA-47j5-hmhq-4c74 · GitHub severity HIGH · GitHub CVSS 7.8
  66. 2026-08-08 16:37 UTCEPSS rescoreEPSS 0.1% · 2nd percentile
  67. 2026-08-08 01:05 UTCVendor advisory
  68. 2026-08-08 01:05 UTCGHSA enrichmentGHSA-47j5-hmhq-4c74 · GitHub severity HIGH · GitHub CVSS 7.8
  69. 2026-08-07 14:00 UTCEG score recompute
  70. 2026-08-07 14:00 UTCVendor advisory

Frequently asked(5)

What is CVE-2026-31419?
CVE-2026-31419 is a high-severity vulnerability; its CVE record was 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 the CVE record for CVE-2026-31419 published?
The CVE record for CVE-2026-31419 was published on April 13, 2026. That is the record's publication date; the vulnerability itself may have been made public earlier. EchelonGraph's copy of the record carries a last-modified date of August 23, 2026; the record at its source may have been updated since.
Is CVE-2026-31419 actively exploited?
CVE-2026-31419 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0.2% probability of exploitation in the next 30 days (7th percentile of EPSS-scored CVEs).
What is the CVSS score of CVE-2026-31419?
CVE-2026-31419 has a CVSS base score of 7.8 (a secondary CVSS source that NVD displays; NVD's own analysis pending).
How do I remediate CVE-2026-31419?
A fix for CVE-2026-31419 is available: update to the fixed version the vendor names in its advisory. The vendor advisories EchelonGraph has for CVE-2026-31419 are linked in the Vendor Advisories panel on this page.

Dependency Blast Radius

See which npm, PyPI, Go, and Maven packages are affected by CVE-2026-31419

Explore →

Is Your Infrastructure Affected by CVE-2026-31419?

EchelonGraph automatically scans your cloud infrastructure and maps CVE exposure using blast radius analysis.