CVE-2025-21961

MEDIUMNVD 5.55.5
EchelonGraph scoreMEDIUM confidence

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

Score 5.5 from GitHub Security Advisory published 2025-04-01. NVD baseline CVSS 5.5; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: EPSS, GitHub Security Advisory, NVD CVSS v3
5.5EG
EchelonGraph verdictMonitorRemediate within your standard update timelines (the SSVC decision on this page).
  • Lower severity and no public exploit yet
CISA-KEV: Not listedEPSS PROB: 0.5%CVSS: 5.5Exploit: None knownExposed services: Not assessed

A fix is available — apply it.

In the Linux kernel, the following vulnerability has been resolved:

eth: bnxt: fix truesize for mb-xdp-pass case

When mb-xdp is set and return is XDP_PASS, packet is converted from xdp_buff to sk_buff with xdp_update_skb_shared_info() in bnxt_xdp_build_skb(). bnxt_xdp_build_skb() passes incorrect truesize argument to xdp_update_skb_shared_info(). The truesize is calculated as BNXT_RX_PAGE_SIZE * sinfo->nr_frags but the skb_shared_info was wiped by napi_build_skb() before. So it stores sinfo->nr_frags before bnxt_xdp_build_skb() and use it instead of getting skb_shared_info from xdp_get_shared_info_from_buff().

Splat looks like: ------------[ cut here ]------------ WARNING: CPU: 2 PID: 0 at net/core/skbuff.c:6072 skb_try_coalesce+0x504/0x590 Modules linked in: xt_nat xt_tcpudp veth af_packet xt_conntrack nft_chain_nat xt_MASQUERADE nf_conntrack_netlink xfrm_user xt_addrtype nft_coms CPU: 2 UID: 0 PID: 0 Comm: swapper/2 Not tainted 6.14.0-rc2+ #3 RIP: 0010:skb_try_coalesce+0x504/0x590 Code: 4b fd ff ff 49 8b 34 24 40 80 e6 40 0f 84 3d fd ff ff 49 8b 74 24 48 40 f6 c6 01 0f 84 2e fd ff ff 48 8d 4e ff e9 25 fd ff ff <0f> 0b e99 RSP: 0018:ffffb62c4120caa8 EFLAGS: 00010287 RAX: 0000000000000003 RBX: ffffb62c4120cb14 RCX: 0000000000000ec0 RDX: 0000000000001000 RSI: ffffa06e5d7dc000 RDI: 0000000000000003 RBP: ffffa06e5d7ddec0 R08: ffffa06e6120a800 R09: ffffa06e7a119900 R10: 0000000000002310 R11: ffffa06e5d7dcec0 R12: ffffe4360575f740 R13: ffffe43600000000 R14: 0000000000000002 R15: 0000000000000002 FS: 0000000000000000(0000) GS:ffffa0755f700000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f147b76b0f8 CR3: 00000001615d4000 CR4: 00000000007506f0 PKRU: 55555554 Call Trace: ? __warn+0x84/0x130 ? skb_try_coalesce+0x504/0x590 ? report_bug+0x18a/0x1a0 ? handle_bug+0x53/0x90 ? exc_invalid_op+0x14/0x70 ? asm_exc_invalid_op+0x16/0x20 ? skb_try_coalesce+0x504/0x590 inet_frag_reasm_finish+0x11f/0x2e0 ip_defrag+0x37a/0x900 ip_local_deliver+0x51/0x120 ip_sublist_rcv_finish+0x64/0x70 ip_sublist_rcv+0x179/0x210 ip_list_rcv+0xf9/0x130

How to reproduce:

ip link set $interface1 xdp obj xdp_pass.o ip link set $interface1 mtu 9000 up ip a a 10.0.0.1/24 dev $interface1

ip link set $interfac2 mtu 9000 up ip a a 10.0.0.2/24 dev $interface2 ping 10.0.0.1 -s 65000

Following ping.py patch adds xdp-mb-pass case. so ping.py is going to be able to reproduce this issue.

CVSS v3
5.5
EG Score
5.5MEDIUMmedium confidence
EG Risk
25
EG Risk 25/100

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)
Severity55% × 45%
The EG Score, 5.5 of 10.
Exploitation0.5% × 40%
FIRST EPSS: the 30-day exploitation probability when EchelonGraph scored this CVE.
Automatability0% × 15%
CISA's SSVC Automatable value: no (Vulnrichment).
SSVC (CISA's decision table, applied by EchelonGraph): Track at every mission impact level.
Exploitation none (CISA Vulnrichment) · Automatable no (CISA Vulnrichment) · Technical impact partial (CISA Vulnrichment). All three are CISA's SSVC values (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
0.5%
EPSS %ILE
39th
KEV
Not listed

SSVC (CISA's decision table, applied by EchelonGraph)Track at every mission impact level.

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

Exploitation none (CISA Vulnrichment) · Automatable no (CISA Vulnrichment) · Technical impact partial (CISA Vulnrichment). All three are CISA's SSVC values (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)60 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 Vulnrichment) · Technical impact partial (CISA Vulnrichment). 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 1, 2025

Last Modified

August 5, 2026

Advisory Details (3)

Auto-updated Aug 2, 2026
Patch available.
Web page

eth: bnxt: fix truesize for mb-xdp-pass case - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/b4679807c6083ade4d47f03f80da891afcb6ef62
Web page

eth: bnxt: fix truesize for mb-xdp-pass case - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/9f7b2aa5034e24d3c49db73d5f760c0435fe31c2
Web page

eth: bnxt: fix truesize for mb-xdp-pass case - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/19107e71be330dbccb9f8f9f4cf0a9abeadad802

Vendor Advisories for CVE-2025-21961(3)

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

Patch Availability(21)

Vendor / EcosystemFix (by version range) / PatchReleasedSource
ubuntulinux-virtual-hwe-24.04-edge (6.11.0-28.28) @ oracular2026-05-30ubuntu
ubuntulinux-tools-gcp-edge (6.8.0-1040.42~22.04.1) @ jammy2026-05-30ubuntu
ubuntulinux-tools-realtime-hwe-22.04 (6.8.1-1034.35~22.04.1) @ jammy2026-05-30ubuntu
ubuntulinux-tools-raspi-6.8 (6.8.0-1039.43) @ noble2026-05-30ubuntu
ubuntulinux-tools-azure-6.11 (6.11.0-1018.18) @ oracular2026-05-30ubuntu
ubuntulinux-tools-oem-24.04b (6.11.0-1024.24) @ noble2026-05-30ubuntu
ubuntulinux-tools-lowlatency-64k (6.11.0-1015.16) @ oracular2026-05-30ubuntu
ubuntulinux-tools-nvidia-lowlatency-64k-6.8 (6.8.0-1039.42.1) @ noble2026-05-30ubuntu
ubuntulinux-virtual-hwe-22.04-edge (6.8.0-84.84~22.04.1) @ jammy2026-05-30ubuntu
ubuntulinux-tools-ibm-lts-24.04 (6.8.0-1037.37) @ noble2026-05-30ubuntu
ubuntulinux-virtual-6.8 (6.8.0-84.84) @ noble2026-05-30ubuntu
ubuntulinux-tools-realtime-6.8.1 (6.8.1-1034.35) @ noble2026-05-30ubuntu
ubuntulinux-tools-azure-lts-24.04 (6.8.0-1038.44) @ noble2026-05-30ubuntu
ubuntulinux-tools-oracle-lts-24.04 (6.8.0-1037.38) @ noble2026-05-30ubuntu
ubuntulinux-tools-oracle-edge (6.8.0-1037.38~22.04.1) @ jammy2026-05-30ubuntu
ubuntulinux-tools-raspi-realtime-6.8 (6.8.0-2031.32) @ noble2026-05-30ubuntu
ubuntulinux-tools-azure-nvidia-lts-24.04 (6.8.0-1025.27) @ noble2026-05-30ubuntu
ubuntulinux-virtual-hwe-22.04-edge (6.8.0-85.85~22.04.1) @ jammy2026-05-30ubuntu
redhatkernel-0:6.12.0-55.19.1.el10_02025-06-30redhat
redhatkernel-0:5.14.0-570.22.1.el9_62025-06-16redhat
linuxKernel @ 6.12.20 (fixes >=5.19.0)—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

(3 across 3 ecosystems)
Debian:12(1)
PackageVulnerable rangeFix by version rangeDependents
linux6.1.106-1 ... 7.2~rc7-1~exp1 (350 versions)
  • every version on: no fix on record
—
Debian:13(1)
PackageVulnerable rangeFix by version rangeDependents
linux—
  • every version up to 6.12.20-1: fixed in 6.12.20-1
—
Debian:14(1)
PackageVulnerable rangeFix by version rangeDependents
linux—
  • every version up to 6.12.20-1: fixed in 6.12.20-1
—

Additional Vendor Advisories

(18)

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 11× in last 7d / 30× 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 93 of 173 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. 7 repeat rows among the latest 100 are merged into the row they repeat. The 80 oldest rows on record are not shown and were not checked, so the counts can still include repeats.

  1. 2026-10-14 16:31 UTCEPSS rescoreEPSS 0.5% · 39th percentile
  2. 2026-10-13 16:32 UTCEPSS rescoreEPSS 0.5% · 38th percentile
  3. 2026-10-12 17:19 UTCEG score recompute
  4. 2026-10-12 16:32 UTCEPSS rescoreEPSS 0.5% · 38th percentile
  5. 2026-10-11 20:51 UTCEG score recompute
  6. 2026-10-11 19:01 UTCEG score recompute
  7. 2026-10-11 15:41 UTCEG score recompute
  8. 2026-10-11 13:47 UTCEPSS rescoreEPSS 0.5% · 38th percentile
  9. 2026-10-10 19:59 UTCEPSS rescoreEPSS 0.5% · 38th percentile
  10. 2026-10-09 20:06 UTCEPSS rescoreEPSS 0.5% · 38th percentile
  11. 2026-10-08 17:09 UTCEPSS rescoreEPSS 0.5% · 38th percentile
  12. 2026-10-07 23:46 UTCEPSS rescoreEPSS 0.5% · 38th percentile
  13. 2026-10-06 15:16 UTCEPSS rescoreEPSS 0.5% · 38th percentile
  14. 2026-10-05 17:42 UTCEPSS rescoreEPSS 0.5% · 38th percentile
  15. 2026-10-04 23:21 UTCEPSS rescoreEPSS 0.5% · 38th percentile
  16. 2026-10-03 14:24 UTCEPSS rescoreEPSS 0.5% · 38th percentile
  17. 2026-10-02 16:26 UTCEPSS rescoreEPSS 0.5% · 38th percentile
  18. 2026-10-01 19:48 UTCEPSS rescoreEPSS 0.5% · 37th percentile
  19. 2026-09-30 15:02 UTCEPSS rescoreEPSS 0.5% · 37th percentile
  20. 2026-09-28 13:50 UTCEPSS rescoreEPSS 0.5% · 37th percentile
  21. 2026-09-27 03:45 UTCOSV refresh
  22. 2026-09-26 15:58 UTCEPSS rescoreEPSS 0.5% · 37th percentile
  23. 2026-09-26 00:24 UTCEPSS rescoreEPSS 0.5% · 37th percentile
  24. 2026-09-24 14:02 UTCEPSS rescoreEPSS 0.5% · 37th percentile
  25. 2026-09-23 13:46 UTCEPSS rescoreEPSS 0.5% · 39th percentile
Show 68 more
  1. 2026-09-22 14:47 UTCEPSS rescoreEPSS 0.5% · 39th percentile
  2. 2026-09-20 20:15 UTCEPSS rescoreEPSS 0.5% · 39th percentile
  3. 2026-09-18 19:27 UTCEPSS rescoreEPSS 0.5% · 39th percentile
  4. 2026-09-16 14:06 UTCEPSS rescoreEPSS 0.5% · 39th percentile
  5. 2026-09-16 05:13 UTCEPSS rescoreEPSS 0.5% · 38th percentile
  6. 2026-09-15 03:09 UTCEPSS rescoreEPSS 0.5% · 38th percentile
  7. 2026-09-13 16:46 UTCEPSS rescoreEPSS 0.5% · 38th percentile
  8. 2026-09-12 15:00 UTCEPSS rescoreEPSS 0.5% · 38th percentile
  9. 2026-09-11 14:51 UTCEPSS rescoreEPSS 0.5% · 38th percentile
  10. 2026-09-11 09:35 UTCEPSS rescoreEPSS 0.5% · 38th percentile
  11. 2026-09-10 09:33 UTCEPSS rescoreEPSS 0.5% · 38th percentile
  12. 2026-09-08 21:59 UTCEPSS rescoreEPSS 0.5% · 38th percentile
  13. 2026-09-07 16:00 UTCEPSS rescoreEPSS 0.5% · 38th percentile
  14. 2026-09-07 12:48 UTCOSV refresh
  15. 2026-09-06 13:46 UTCEPSS rescoreEPSS 0.5% · 38th percentile
  16. 2026-09-05 15:28 UTCEPSS rescoreEPSS 0.5% · 38th percentile
  17. 2026-09-04 05:05 UTCEPSS rescoreEPSS 0.5% · 38th percentile
  18. 2026-09-02 14:11 UTCEPSS rescoreEPSS 0.5% · 38th percentile
  19. 2026-09-01 13:52 UTCEPSS rescoreEPSS 0.5% · 38th percentile
  20. 2026-09-01 04:38 UTCEPSS rescoreEPSS 0.5% · 38th percentile
  21. 2026-08-30 19:16 UTCEPSS rescoreEPSS 0.5% · 38th percentile
  22. 2026-08-30 01:21 UTCEPSS rescoreEPSS 0.5% · 38th percentile
  23. 2026-08-28 21:40 UTCEPSS rescoreEPSS 0.5% · 38th percentile
  24. 2026-08-27 14:24 UTCEPSS rescoreEPSS 0.4% · 36th percentile
  25. 2026-08-25 13:47 UTCEPSS rescoreEPSS 0.4% · 36th percentile
  26. 2026-08-23 00:18 UTCEPSS rescoreEPSS 0.4% · 37th percentile
  27. 2026-08-21 23:48 UTCEPSS rescoreEPSS 0.4% · 37th percentile
  28. 2026-08-20 22:54 UTCEPSS rescoreEPSS 0.4% · 37th percentile
  29. 2026-08-20 22:31 UTCOSV refresh
  30. 2026-08-19 17:03 UTCEPSS rescoreEPSS 0.4% · 36th percentile
  31. 2026-08-18 13:47 UTCEPSS rescoreEPSS 0.4% · 36th percentile
  32. 2026-08-17 13:46 UTCEPSS rescoreEPSS 0.4% · 36th percentile
  33. 2026-08-16 14:55 UTCEPSS rescoreEPSS 0.4% · 36th percentile
  34. 2026-08-16 02:13 UTCEPSS rescoreEPSS 0.4% · 36th percentile
  35. 2026-08-15 01:29 UTCEPSS rescoreEPSS 0.4% · 36th percentile
  36. 2026-08-13 21:59 UTCEPSS rescoreEPSS 0.4% · 36th percentile
  37. 2026-08-12 13:50 UTCEPSS rescoreEPSS 0.4% · 36th percentile
  38. 2026-08-10 23:59 UTCEPSS rescoreEPSS 0.4% · 36th percentile
  39. 2026-08-09 13:45 UTCEPSS rescoreEPSS 0.4% · 36th percentile
  40. 2026-08-07 16:26 UTCEPSS rescoreEPSS 0.4% · 36th percentile
  41. 2026-08-06 13:46 UTCEPSS rescoreEPSS 0.4% · 36th percentile
  42. 2026-08-05 19:16 UTCEPSS rescoreEPSS 0.4% · 36th percentile
  43. 2026-08-05 14:00 UTCEG score recompute
  44. 2026-08-05 14:00 UTCVendor advisory
  45. 2026-08-05 14:00 UTCGHSA enrichmentGHSA-v974-f78x-v6pq · GitHub CVSS 5.5
  46. 2026-08-04 15:09 UTCEPSS rescoreEPSS 0.4% · 35th percentile
  47. 2026-08-04 10:37 UTCEPSS rescoreEPSS 0.4% · 35th percentile
  48. 2026-08-03 10:35 UTCEPSS rescoreEPSS 0.4% · 35th percentile
  49. 2026-08-02 02:25 UTCEPSS rescoreEPSS 0.4% · 35th percentile
  50. 2026-08-01 04:15 UTCEPSS rescoreEPSS 0.4% · 35th percentile
  51. 2026-07-30 16:27 UTCEPSS rescoreEPSS 0.4% · 35th percentile
  52. 2026-07-30 07:17 UTCEG score recompute
  53. 2026-07-30 07:17 UTCVendor advisory
  54. 2026-07-30 07:16 UTCGHSA enrichmentGHSA-v974-f78x-v6pq · GitHub CVSS 5.5
  55. 2026-07-30 01:29 UTCEPSS rescoreEPSS 0.2% · 8th percentile
  56. 2026-07-28 15:35 UTCEPSS rescoreEPSS 0.2% · 8th percentile
  57. 2026-07-27 14:12 UTCEPSS rescoreEPSS 0.2% · 8th percentile
  58. 2026-07-26 14:53 UTCEPSS rescoreEPSS 0.2% · 8th percentile
  59. 2026-07-25 14:17 UTCEPSS rescoreEPSS 0.2% · 8th percentile
  60. 2026-07-24 14:17 UTCEPSS rescoreEPSS 0.2% · 8th percentile
  61. 2026-07-24 10:41 UTCOSV refresh
  62. 2026-07-23 14:17 UTCEPSS rescoreEPSS 0.2% · 8th percentile
  63. 2026-07-23 02:50 UTCEG score recompute
  64. 2026-07-22 14:07 UTCEPSS rescoreEPSS 0.2% · 8th percentile
  65. 2026-07-21 15:24 UTCEPSS rescoreEPSS 0.2% · 8th percentile
  66. 2026-07-20 17:07 UTCEPSS rescoreEPSS 0.2% · 8th percentile
  67. 2026-07-19 14:30 UTCEPSS rescoreEPSS 0.2% · 8th percentile
  68. 2026-07-19 02:28 UTCEPSS rescoreEPSS 0.2% · 8th percentile

Related CVEs(same vendor)

Frequently asked(5)

What is CVE-2025-21961?
CVE-2025-21961 is a medium-severity vulnerability; its CVE record was published on April 1, 2025. In the Linux kernel, the following vulnerability has been resolved: eth: bnxt: fix truesize for mb-xdp-pass case When mb-xdp is set and return is XDP_PASS, packet is converted from xdpbuff to skbuff with xdpupdateskbsharedinfo() in bnxtxdpbuild_skb(). bnxtxdpbuild_skb() passes incorrect truesize…
When was the CVE record for CVE-2025-21961 published?
The CVE record for CVE-2025-21961 was published on April 1, 2025. 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 5, 2026; the record at its source may have been updated since.
Is CVE-2025-21961 actively exploited?
CVE-2025-21961 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0.5% probability of exploitation in the next 30 days (39th percentile of EPSS-scored CVEs).
What is the CVSS score of CVE-2025-21961?
CVE-2025-21961 has a CVSS v3 base score of 5.5 (NVD).
How do I remediate CVE-2025-21961?
A fix for CVE-2025-21961 is available: update to the fixed version the vendor names in its advisory. The vendor advisories EchelonGraph has for CVE-2025-21961 are linked in the Vendor Advisories panel on this page.

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