CVE-2025-38639

MEDIUMNVD 5.55.5—
EchelonGraph scoreMEDIUM confidence

Score 5.5 from GitHub Security Advisory published 2025-08-22. NVD baseline CVSS 5.5; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, nvd
Trending — 4 sources updated this week
5.5EG
EchelonGraph verdictMonitorLow exploitation likelihood right now — keep watching.
  • Lower severity and no public exploit yet
CISA-KEV: Not listedEPSS PROB: 0%CVSS: 5.5Exploit: None knownExposed: 0

A fix is available — apply it.

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

netfilter: xt_nfacct: don't assume acct name is null-terminated

BUG: KASAN: slab-out-of-bounds in .. lib/vsprintf.c:721 Read of size 1 at addr ffff88801eac95c8 by task syz-executor183/5851 [..] string+0x231/0x2b0 lib/vsprintf.c:721 vsnprintf+0x739/0xf00 lib/vsprintf.c:2874 [..] nfacct_mt_checkentry+0xd2/0xe0 net/netfilter/xt_nfacct.c:41 xt_check_match+0x3d1/0xab0 net/netfilter/x_tables.c:523

nfnl_acct_find_get() handles non-null input, but the error printk relied on its presence.

CVSS v3
5.5
EG Score
5.5(medium)
EG Risk
29(Track)
EG Risk 29/100SSVC: Track

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
Severity55% × 45%
Exploitation0% × 40%
Automatability30% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
0%
EPSS %ILE
7%
KEV
Not listed

Published

August 22, 2025

Last Modified

August 5, 2026

Advisory Details (9)

Auto-updated Aug 5, 2026
No patch confirmed yet.
generic

netfilter: xt_nfacct: don't assume acct name is null-terminated - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/bf58e667af7d96c8eb9411f926a0a0955f41ce21
generic

netfilter: xt_nfacct: don't assume acct name is null-terminated - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/df13c9c6ce1d55c31d1bd49db65a7fbbd86aab13
generic

netfilter: xt_nfacct: don't assume acct name is null-terminated - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/58007fc7b94fb2702000045ff401eb7f5bde7828
generic

netfilter: xt_nfacct: don't assume acct name is null-terminated - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/7c1ae471da69c09242834e956218ea6a42dd405a
generic

netfilter: xt_nfacct: don't assume acct name is null-terminated - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/58004aa21e79addaf41667bfe65e93ec51653f18
generic

netfilter: xt_nfacct: don't assume acct name is null-terminated - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/e18939176e657a3a20bfbed357b8c55a9f82aba3
generic

netfilter: xt_nfacct: don't assume acct name is null-terminated - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/b10cfa2de13d28ddd03210eb234422b7ec92725a
generic

netfilter: xt_nfacct: don't assume acct name is null-terminated - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/e021a1eee196887536a6630c5492c23a4c78d452
generic

netfilter: xt_nfacct: don't assume acct name is null-terminated - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/66d41268ede1e1b6e71ba28be923397ff0b2b9c3

Patch Availability(31)

Vendor / EcosystemFixed in / PatchReleasedSource
ubuntulinux-virtual-hwe-24.04-edge (6.14.0-36.36) @ plucky2026-05-30ubuntu
ubuntulinux-xilinx-zynqmp-tools-5.15.0-1061 (5.15.0-1061.65) @ jammy2026-05-30ubuntu
ubuntulinux-tools-realtime-hwe-24.04-edge (6.14.0-1016.16~24.04.1) @ noble2026-05-30ubuntu
ubuntulinux-tools-oem-6.14 (6.14.0-1016.16) @ noble2026-05-30ubuntu
ubuntulinux-tools-oracle-edge (6.14.0-1017.17~24.04.1) @ noble2026-05-30ubuntu
ubuntulinux-tools-raspi-6.14 (6.14.0-1018.18) @ plucky2026-05-30ubuntu
ubuntulinux-tools-realtime-5.15 (5.15.0.1096.100) @ jammy2026-05-30ubuntu
ubuntulinux-tools-gkeop-5.15 (5.15.0.1080.79) @ jammy2026-05-30ubuntu
ubuntulinux-tools-kvm-5.15 (5.15.0.1089.85) @ jammy2026-05-30ubuntu
ubuntulinux-tools-raspi-nolpae (5.15.0.1091.89) @ jammy2026-05-30ubuntu
ubuntulinux-tools-gcp-fips-5.15 (5.15.0.1097.87) @ jammy2026-05-30ubuntu
ubuntulinux-tools-azure-lts-22.04 (5.15.0.1101.99) @ jammy2026-05-30ubuntu
ubuntulinux-tools-azure-fips-5.15 (5.15.0.1101.86) @ jammy2026-05-30ubuntu
ubuntulinux-tools-azure-6.14 (6.14.0-1017.17) @ plucky2026-05-30ubuntu
ubuntulinux-tools-realtime-hwe-22.04 (6.8.1-1041.42~22.04.1) @ jammy2026-05-30ubuntu
ubuntulinux-tools-gcp-edge (6.8.0-1047.50~22.04.2) @ jammy2026-05-30ubuntu
ubuntulinux-tools-realtime-6.8.1 (6.8.1-1041.42) @ noble2026-05-30ubuntu
ubuntulinux-tools-azure-edge (5.15.0.1102.111~20.04.1) @ focal2026-05-30ubuntu
ubuntulinux-virtual-6.8 (6.8.0-100.100) @ noble2026-05-30ubuntu
ubuntulinux-tools-fips-6.8 (6.8.0-100.100+fips1) @ noble2026-05-30ubuntu
ubuntulinux-tools-oracle-lts-24.04 (6.8.0-1043.44) @ noble2026-05-30ubuntu
ubuntulinux-tools-lowlatency-hwe-20.04-edge (6.8.0-100.100.1) @ noble2026-05-30ubuntu
ubuntulinux-tools-gke-64k-6.8 (6.8.0-1043.48) @ noble2026-05-30ubuntu
ubuntulinux-tools-gcp-fips-6.8 (6.8.0-1047.50+fips1) @ noble2026-05-30ubuntu
ubuntulinux-tools-nvidia-lowlatency-64k-6.8 (6.8.0-1046.49.1) @ noble2026-05-30ubuntu
ubuntulinux-virtual-hwe-22.04-edge (6.8.0-100.100~22.04.1) @ jammy2026-05-30ubuntu
ubuntulinux-tools-ibm-lts-24.04 (6.8.0-1044.44) @ noble2026-05-30ubuntu
ubuntulinux-xilinx-zynqmp (6.8.0.1023.24) @ noble2026-05-30ubuntu
ubuntulinux-tools-azure-lts-24.04 (6.8.0-1046.52) @ noble2026-05-30ubuntu
ubuntulinux-tools-azure-fips-6.8 (6.8.0-1046.52+fips1) @ noble2026-05-30ubuntu
linuxKernel @ 5.4.297—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.

All Vendor Advisories

(25)

Every vendor that published an advisory referencing this CVE — pulled from our cve_vendor_advisories aggregation. Click any row for the vendor's original advisory page.

Data Freshness Timeline

(refreshed 8× in last 7d / 42× 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 103 total refreshes for this CVE.

  1. 2026-08-07 16:26 UTCEPSS rescore
  2. 2026-08-06 13:46 UTCEPSS rescore
  3. 2026-08-05 12:59 UTCEG score recompute
  4. 2026-08-05 12:59 UTCVendor advisory
  5. 2026-08-05 12:59 UTCGHSA enrichment
  6. 2026-08-04 15:09 UTCEPSS rescore
  7. 2026-08-03 10:35 UTCEPSS rescore
  8. 2026-08-02 02:26 UTCEPSS rescore
  9. 2026-08-01 04:15 UTCEPSS rescore
  10. 2026-07-30 16:27 UTCEPSS rescore
  11. 2026-07-30 06:59 UTCEG score recompute
  12. 2026-07-30 06:59 UTCVendor advisory
  13. 2026-07-30 06:59 UTCGHSA enrichment
  14. 2026-07-30 01:29 UTCEPSS rescore
  15. 2026-07-28 15:35 UTCEPSS rescore
  16. 2026-07-26 14:54 UTCEPSS rescore
  17. 2026-07-25 14:17 UTCEPSS rescore
  18. 2026-07-25 14:17 UTCEPSS rescore
  19. 2026-07-24 14:17 UTCEPSS rescore
  20. 2026-07-23 22:11 UTCOSV refresh
  21. 2026-07-23 02:54 UTCEG score recompute
  22. 2026-07-22 14:07 UTCEPSS rescore
  23. 2026-07-22 14:07 UTCEPSS rescore
  24. 2026-07-21 15:24 UTCEPSS rescore
  25. 2026-07-20 17:07 UTCEPSS rescore
Show 75 more
  1. 2026-07-19 14:30 UTCEPSS rescore
  2. 2026-07-19 14:30 UTCEPSS rescore
  3. 2026-07-19 02:28 UTCEPSS rescore
  4. 2026-07-19 02:28 UTCEPSS rescore
  5. 2026-07-16 17:02 UTCEPSS rescore
  6. 2026-07-15 16:57 UTCEPSS rescore
  7. 2026-07-15 16:57 UTCEPSS rescore
  8. 2026-07-15 01:59 UTCEPSS rescore
  9. 2026-07-15 01:59 UTCEPSS rescore
  10. 2026-07-13 22:29 UTCEPSS rescore
  11. 2026-07-13 22:29 UTCEPSS rescore
  12. 2026-07-13 06:12 UTCEPSS rescore
  13. 2026-07-12 05:46 UTCEPSS rescore
  14. 2026-07-11 08:27 UTCEPSS rescore
  15. 2026-07-11 08:27 UTCEPSS rescore
  16. 2026-07-09 19:09 UTCEPSS rescore
  17. 2026-07-09 19:09 UTCEPSS rescore
  18. 2026-07-07 13:45 UTCEPSS rescore
  19. 2026-07-06 16:21 UTCOSV refresh
  20. 2026-07-06 02:23 UTCEPSS rescore
  21. 2026-07-04 06:30 UTCEPSS rescore
  22. 2026-07-01 15:06 UTCEPSS rescore
  23. 2026-07-01 15:06 UTCEPSS rescore
  24. 2026-06-30 23:22 UTCEPSS rescore
  25. 2026-06-30 23:22 UTCEPSS rescore
  26. 2026-06-29 14:06 UTCEPSS rescore
  27. 2026-06-29 14:06 UTCEPSS rescore
  28. 2026-06-28 14:07 UTCEPSS rescore
  29. 2026-06-28 14:07 UTCEPSS rescore
  30. 2026-06-28 04:55 UTCEPSS rescore
  31. 2026-06-28 04:55 UTCEPSS rescore
  32. 2026-06-27 03:08 UTCEPSS rescore
  33. 2026-06-27 03:08 UTCEPSS rescore
  34. 2026-06-25 13:49 UTCEPSS rescore
  35. 2026-06-25 13:49 UTCEPSS rescore
  36. 2026-06-24 14:04 UTCEPSS rescore
  37. 2026-06-24 14:04 UTCEPSS rescore
  38. 2026-06-23 21:32 UTCEPSS rescore
  39. 2026-06-23 21:32 UTCEPSS rescore
  40. 2026-06-22 14:25 UTCEPSS rescore
  41. 2026-06-22 14:25 UTCEPSS rescore
  42. 2026-06-21 14:56 UTCEPSS rescore
  43. 2026-06-21 14:56 UTCEPSS rescore
  44. 2026-06-21 01:59 UTCEPSS rescore
  45. 2026-06-21 01:59 UTCEPSS rescore
  46. 2026-06-19 19:25 UTCEPSS rescore
  47. 2026-06-19 19:25 UTCEPSS rescore
  48. 2026-06-18 04:43 UTCOSV refresh
  49. 2026-06-17 17:52 UTCEPSS rescore
  50. 2026-06-16 17:52 UTCEPSS rescore
  51. 2026-06-16 17:52 UTCEPSS rescore
  52. 2026-06-14 23:17 UTCEPSS rescore
  53. 2026-06-13 23:00 UTCEPSS rescore
  54. 2026-06-12 23:11 UTCEPSS rescore
  55. 2026-06-11 14:00 UTCEPSS rescore
  56. 2026-06-10 22:18 UTCEPSS rescore
  57. 2026-06-10 13:22 UTCEPSS rescore
  58. 2026-06-08 14:16 UTCEPSS rescore
  59. 2026-06-08 14:16 UTCEPSS rescore
  60. 2026-06-07 15:24 UTCEPSS rescore
  61. 2026-06-06 13:47 UTCEPSS rescore
  62. 2026-06-06 13:47 UTCEPSS rescore
  63. 2026-06-05 22:46 UTCEPSS rescore
  64. 2026-06-05 22:46 UTCEPSS rescore
  65. 2026-06-05 06:10 UTCEPSS rescore
  66. 2026-06-05 06:10 UTCEPSS rescore
  67. 2026-06-04 13:12 UTCEPSS rescore
  68. 2026-06-04 13:12 UTCEPSS rescore
  69. 2026-06-02 20:12 UTCEPSS rescore
  70. 2026-06-01 13:51 UTCEPSS rescore
  71. 2026-06-01 13:51 UTCEPSS rescore
  72. 2026-05-31 22:30 UTCEPSS rescore
  73. 2026-05-31 22:30 UTCEPSS rescore
  74. 2026-05-31 00:16 UTCEPSS rescore
  75. 2026-05-30 00:02 UTCEG score recompute

Frequently asked(5)

What is CVE-2025-38639?
CVE-2025-38639 is a medium vulnerability published on August 22, 2025. In the Linux kernel, the following vulnerability has been resolved: netfilter: xt_nfacct: don't assume acct name is null-terminated BUG: KASAN: slab-out-of-bounds in .. lib/vsprintf.c:721 Read of size 1 at addr ffff88801eac95c8 by task syz-executor183/5851 [..] string+0x231/0x2b0 lib/vsprintf.c:721…
When was CVE-2025-38639 disclosed?
CVE-2025-38639 was first published in the National Vulnerability Database on August 22, 2025, with the most recent update on August 5, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2025-38639 actively exploited?
CVE-2025-38639 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0% probability of exploitation in the next 30 days, which ranks it in the top 92.8% of all scored CVEs.
What is the CVSS score of CVE-2025-38639?
CVE-2025-38639 has a CVSS v3 base score of 5.5 (NVD).
How do I remediate CVE-2025-38639?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2025-38639, 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.

Dependency Blast Radius

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