5.5

CVE-2025-21799: linux NULL Pointer Dereference

CVSS: 5.5v3.1MediumModified
AliasesUBUNTU-CVE-2025-21799DEBIAN-CVE-2025-21799
Published 27-02-2025Last modified 11-05-2026
Open JSON

Vulnerability summary

CVE-2025-21799 is a medium (CVSS 5.5) NULL Pointer Dereference vulnerability in linux. EPSS estimates a 0.23% chance of exploitation in the next 30 days, higher than 12.5% of scored vulnerabilities.

Overall risk
22/100
0100
Low · default modelHow is this calculated?
CVSS score
5.5/10
010
Medium · v3.1 (NVD)
EPSS score
0.23%
0%100%
Low · 0.00 pp in 30 days
KEVNot listedIn no KEV catalog
RansomwareNone recordedNo known use recorded
Public exploits0No public exploits recorded

Advisory lineage

Upstream 0 · Downstream 35 · Related 34
DLA-4102-1DLA-4178-1SUSE-SU-2025:01919-1SUSE-SU-2025:0847-1SUSE-SU-2025:0856-1SUSE-SU-2025:0955-1

Timeline

  1. 27-02-2025
    PublishedVulnerability first disclosed.
  2. 11-05-2026
    Last modifiedVulnerability information updated.

Description

In the Linux kernel, the following vulnerability has been resolved: net: ethernet: ti: am65-cpsw: fix freeing IRQ in am65_cpsw_nuss_remove_tx_chns() When getting the IRQ we use k3_udma_glue_tx_get_irq() which returns negative error value on error. So not NULL check is not sufficient to deteremine if IRQ is valid. Check that IRQ is greater then zero to ensure it is valid. There is no issue at probe time but at runtime user can invoke .set_channels which results in the following call chain. am65_cpsw_set_channels() am65_cpsw_nuss_update_tx_rx_chns() am65_cpsw_nuss_remove_tx_chns() am65_cpsw_nuss_init_tx_chns() At this point if am65_cpsw_nuss_init_tx_chns() fails due to k3_udma_glue_tx_get_irq() then tx_chn->irq will be set to a negative value. Then, at subsequent .set_channels with higher channel count we will attempt to free an invalid IRQ in am65_cpsw_nuss_remove_tx_chns() leading to a kernel warning. The issue is present in the original commit that introduced this driver, although there, am65_cpsw_nuss_update_tx_rx_chns() existed as am65_cpsw_nuss_update_tx_chns().

CVSS metrics

3 scores · 3 sources · 1 version

EPSS trend

Probability

0.23%

Chance of exploitation in the next 30 days

Percentile

13%

Versus all other CVEs

30-day change

0.00 pp

From 0.22% on 19-09-2026

19-09-202619-10-2026
EPSS score
0.23%

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

Affected systems

Ubuntu124 products
  • linux< 5.15.0-140.150 | < 6.8.0-64.67
  • linux-allwinner-5.19All versions (No fix recorded)
  • linux-aws< 5.15.0-1084.91 | < 6.8.0-1032.34
  • linux-aws-5.0All versions (No fix recorded)
  • linux-aws-5.11All versions (No fix recorded)
Linux2 products
  • linux≥ 93a76530316a3d8cc2d82c3deca48424fee92100, < 321990fdf4f1bb64e818c7140688bf33d129e48d | ≥ 93a76530316a3d8cc2d82c3deca48424fee92100, < ed8c0300f302338c36edb06bca99051e5be6fb2f | ≥ 93a76530316a3d8cc2d82c3deca48424fee92100, < aea5cca681d268f794fa2385f9ec26a5cce025cd | ≥ 93a76530316a3d8cc2d82c3deca48424fee92100, < 88fd5db8c0073bd91d18391feb5741aeb0a2b475 | ≥ 93a76530316a3d8cc2d82c3deca48424fee92100, < 8448c87b3af68bebca21e3136913f7f77e363515 | ≥ 93a76530316a3d8cc2d82c3deca48424fee92100, < 8aae91ae1c65782a169ec070e023d4d269e5d6e6 | ≥ 93a76530316a3d8cc2d82c3deca48424fee92100, < 4395a44acb15850e492dd1de9ec4b6479d96bc80 | 5.7
  • linux_kernel≥ 5.7, < 5.10.235 | ≥ 5.11, < 5.15.179 | ≥ 5.16, < 6.1.129 | ≥ 6.2, < 6.6.76 | ≥ 6.7, < 6.12.13 | ≥ 6.13, < 6.13.2
Debian1 product
  • linux< 6.1.129-1 | < 6.12.13-1

3 vendors · 127 products

References

39 links
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