9.8

CVE-2025-38439: debian debian_linux

CVSS: 9.8v3.1CriticalModified
AliasesUBUNTU-CVE-2025-38439DEBIAN-CVE-2025-38439
Published 25-07-2025Last modified 15-10-2026
Open JSON

Vulnerability summary

CVE-2025-38439 is a critical (CVSS 9.8) vulnerability in debian debian_linux. EPSS estimates a 0.54% chance of exploitation in the next 30 days, higher than 44.8% of scored vulnerabilities.

Overall risk
70/100
0100
High · default modelHow is this calculated?
CVSS score
9.8/10
010
Critical · v3.1 (CVE.org)
EPSS score
0.54%
0%100%
Low · +0.05 pp in 30 days
KEVNot listedIn no KEV catalog
RansomwareNone recordedNo known use recorded
Public exploits0No public exploits recorded

Advisory lineage

Upstream 0 · Downstream 53 · Related 47
DLA-4327-1DLA-4328-1DSA-5973-1DSA-5975-1MGASA-2025-0218MGASA-2025-0219

Timeline

  1. 25-07-2025
    PublishedVulnerability first disclosed.
  2. 15-10-2026
    Last modifiedVulnerability information updated.

Description

In the Linux kernel, the following vulnerability has been resolved: bnxt_en: Set DMA unmap len correctly for XDP_REDIRECT When transmitting an XDP_REDIRECT packet, call dma_unmap_len_set() with the proper length instead of 0. This bug triggers this warning on a system with IOMMU enabled: WARNING: CPU: 36 PID: 0 at drivers/iommu/dma-iommu.c:842 __iommu_dma_unmap+0x159/0x170 RIP: 0010:__iommu_dma_unmap+0x159/0x170 Code: a8 00 00 00 00 48 c7 45 b0 00 00 00 00 48 c7 45 c8 00 00 00 00 48 c7 45 a0 ff ff ff ff 4c 89 45 b8 4c 89 45 c0 e9 77 ff ff ff <0f> 0b e9 60 ff ff ff e8 8b bf 6a 00 66 66 2e 0f 1f 84 00 00 00 00 RSP: 0018:ff22d31181150c88 EFLAGS: 00010206 RAX: 0000000000002000 RBX: 00000000e13a0000 RCX: 0000000000000000 RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000 RBP: ff22d31181150cf0 R08: ff22d31181150ca8 R09: 0000000000000000 R10: 0000000000000000 R11: ff22d311d36c9d80 R12: 0000000000001000 R13: ff13544d10645010 R14: ff22d31181150c90 R15: ff13544d0b2bac00 FS: 0000000000000000(0000) GS:ff13550908a00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00005be909dacff8 CR3: 0008000173408003 CR4: 0000000000f71ef0 PKRU: 55555554 Call Trace: <IRQ> ? show_regs+0x6d/0x80 ? __warn+0x89/0x160 ? __iommu_dma_unmap+0x159/0x170 ? report_bug+0x17e/0x1b0 ? handle_bug+0x46/0x90 ? exc_invalid_op+0x18/0x80 ? asm_exc_invalid_op+0x1b/0x20 ? __iommu_dma_unmap+0x159/0x170 ? __iommu_dma_unmap+0xb3/0x170 iommu_dma_unmap_page+0x4f/0x100 dma_unmap_page_attrs+0x52/0x220 ? srso_alias_return_thunk+0x5/0xfbef5 ? xdp_return_frame+0x2e/0xd0 bnxt_tx_int_xdp+0xdf/0x440 [bnxt_en] __bnxt_poll_work_done+0x81/0x1e0 [bnxt_en] bnxt_poll+0xd3/0x1e0 [bnxt_en]

CVSS metrics

4 scores · 4 sources · 1 version

EPSS trend

Probability

0.54%

Chance of exploitation in the next 30 days

Percentile

45%

Versus all other CVEs

30-day change

+0.05 pp

From 0.49% on 21-09-2026

21-09-202621-10-2026
EPSS score
0.54%

Known exploited

Compare KEV catalogs

Not in any of the 3 tracked catalogs.

Public exploits

0 found

No public exploits indexed.

Weaknesses

CWE · root cause

No weakness data has been published for this record.

Affected systems

Ubuntu143 products
  • linuxAll versions (No fix recorded) | < 5.15.0-156.166 | < 6.8.0-100.100
  • linux-allwinner-5.19All versions (No fix recorded)
  • linux-awsAll versions (No fix recorded) | < 5.15.0-1092.99 | < 6.8.0-1046.49
  • linux-aws-5.0All versions (No fix recorded)
  • linux-aws-5.11All versions (No fix recorded)
Debian2 products
  • linux< 6.1.147-1 | < 6.12.41-1 | < 6.16.3-1
  • debian_linuxEOL11.0
Linux2 products
  • linux≥ f18c2b77b2e4eec2313d519ba125bd6a069513cf, < e260f4d49370c85a4701d43c6d16b8c39f8b605f | ≥ f18c2b77b2e4eec2313d519ba125bd6a069513cf, < 16ae306602163fcb7ae83f2701b542e43c100cee | ≥ f18c2b77b2e4eec2313d519ba125bd6a069513cf, < 8d672a1a6bfc81fef9151925c9c0481f4acf4bec | ≥ f18c2b77b2e4eec2313d519ba125bd6a069513cf, < f9eaf6d036075dc820520e1194692c0619b7297b | ≥ f18c2b77b2e4eec2313d519ba125bd6a069513cf, < 5909679a82cd74cf0343d9e3ddf4b6931aa7e613 | ≥ f18c2b77b2e4eec2313d519ba125bd6a069513cf, < f154e41e1d9d15ab21300ba7bbf0ebb5cb3b9c2a | ≥ f18c2b77b2e4eec2313d519ba125bd6a069513cf, < 50dad9909715094e7d9ca25e9e0412b875987519 | ≥ f18c2b77b2e4eec2313d519ba125bd6a069513cf, < 3cdf199d4755d477972ee87110b2aebc88b3cfad | 5.3
  • linux_kernel≥ 5.3, < 5.4.296 | ≥ 5.5, < 5.10.240 | ≥ 5.11, < 5.15.189 | ≥ 5.16, < 6.1.146 | ≥ 6.2, < 6.6.99 | ≥ 6.7, < 6.12.39 | ≥ 6.13, < 6.15.7 | 6.16:rc1 | 6.16:rc2 | 6.16:rc3 | 6.16:rc4 | 6.16:rc5

3 vendors · 147 products

References

46 links
Show all 46 references