Linux Kernel up to 6.19.5 jfs drop_nlink buffer overflow

CVSS Meta Temp Score
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CTI Interest Score
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6.6$0-$5k0.00

Summaryinfo

A vulnerability was found in Linux Kernel up to 6.19.5 and classified as critical. Affected by this issue is the function drop_nlink of the component jfs. The manipulation results in buffer overflow. This vulnerability was named CVE-2025-71292. There is no available exploit. It is suggested to upgrade the affected component.

Detailsinfo

A vulnerability was found in Linux Kernel up to 6.19.5. It has been classified as critical. Affected is the function drop_nlink of the component jfs. The manipulation with an unknown input leads to a buffer overflow vulnerability. CWE is classifying the issue as CWE-120. The product copies an input buffer to an output buffer without verifying that the size of the input buffer is less than the size of the output buffer, leading to a buffer overflow. This is going to have an impact on confidentiality, integrity, and availability. CVE summarizes:

In the Linux kernel, the following vulnerability has been resolved: jfs: nlink overflow in jfs_rename If nlink is maximal for a directory (-1) and inside that directory you perform a rename for some child directory (not moving from the parent), then the nlink of the first directory is first incremented and later decremented. Normally this is fine, but when nlink = -1 this causes a wrap around to 0, and then drop_nlink issues a warning. After applying the patch syzbot no longer issues any warnings. I also ran some basic fs tests to look for any regressions.

The advisory is shared for download at git.kernel.org. This vulnerability is traded as CVE-2025-71292 since 05/06/2026. The exploitability is told to be easy. There are known technical details, but no exploit is available. The current price for an exploit might be approx. USD $0-$5k (estimation calculated on 06/03/2026).

The vulnerability scanner Nessus provides a plugin with the ID 318288 (Debian dla-4606 : ata-modules-5.10.0-43-armmp-di - security update), which helps to determine the existence of the flaw in a target environment.

Upgrading to version 5.10.252, 5.15.202, 6.1.165, 6.6.128, 6.12.75, 6.18.16 or 6.19.6 eliminates this vulnerability. Applying the patch 2108829a59f081e822fdab8c2cd7131deb8aa8a1/b4330a0d0947fbdc9d445cbbeabd8cc910a8c9ca/a3d66089e50a6e0142f8884471f74292102ea9aa/f70fcbc2ac7c24f087a2c895c5753aa730b1e479/5d77c36cd4b698649f5c30c5f6c084f4f61d1880/fe136426e30ca6debcf916fd6a141555ed9fde74/93c325746ae59709b4f9bad4e3e4761c8d566c70/9218dc26fd922b09858ecd3666ed57dfd8098da8 is able to eliminate this problem. The bugfix is ready for download at git.kernel.org. The best possible mitigation is suggested to be upgrading to the latest version.

The vulnerability is also documented in the databases at Tenable (318288) and CERT Bund (WID-SEC-2026-1405). Once again VulDB remains the best source for vulnerability data.

Affected

  • Debian Linux
  • Oracle Linux
  • Microsoft Azure Linux
  • Open Source Linux Kernel

Productinfo

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Version

License

Website

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔒
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 6.8
VulDB Meta Temp Score: 6.6

VulDB Base Score: 8.0
VulDB Temp Score: 7.6
VulDB Vector: 🔒
VulDB Reliability: 🔍

NVD Base Score: 5.5
NVD Vector: 🔒

CVSSv2info

AVACAuCIA
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VectorComplexityAuthenticationConfidentialityIntegrityAvailability
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VulDB Base Score: 🔒
VulDB Temp Score: 🔒
VulDB Reliability: 🔍

Exploitinginfo

Class: Buffer overflow
CWE: CWE-120 / CWE-119
CAPEC: 🔒
ATT&CK: 🔒

Physical: Partially
Local: Yes
Remote: Partially

Availability: 🔒
Status: Not defined

EPSS Score: 🔒
EPSS Percentile: 🔒

Price Prediction: 🔍
Current Price Estimation: 🔒

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Nessus ID: 318288
Nessus Name: Debian dla-4606 : ata-modules-5.10.0-43-armmp-di - security update

Threat Intelligenceinfo

Interest: 🔍
Active Actors: 🔍
Active APT Groups: 🔍

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔒

Upgrade: Kernel 5.10.252/5.15.202/6.1.165/6.6.128/6.12.75/6.18.16/6.19.6
Patch: 2108829a59f081e822fdab8c2cd7131deb8aa8a1/b4330a0d0947fbdc9d445cbbeabd8cc910a8c9ca/a3d66089e50a6e0142f8884471f74292102ea9aa/f70fcbc2ac7c24f087a2c895c5753aa730b1e479/5d77c36cd4b698649f5c30c5f6c084f4f61d1880/fe136426e30ca6debcf916fd6a141555ed9fde74/93c325746ae59709b4f9bad4e3e4761c8d566c70/9218dc26fd922b09858ecd3666ed57dfd8098da8

Timelineinfo

05/06/2026 Advisory disclosed
05/06/2026 +0 days CVE reserved
05/06/2026 +0 days VulDB entry created
06/03/2026 +28 days VulDB entry last update

Sourcesinfo

Vendor: kernel.org

Advisory: git.kernel.org
Status: Confirmed

CVE: CVE-2025-71292 (🔒)
GCVE (CVE): GCVE-0-2025-71292
GCVE (VulDB): GCVE-100-361428
CERT Bund: WID-SEC-2026-1405 - Linux Kernel: Mehrere Schwachstellen

Entryinfo

Created: 05/06/2026 16:39
Updated: 06/03/2026 18:45
Changes: 05/06/2026 16:39 (59), 05/17/2026 11:32 (11), 05/18/2026 14:52 (7), 06/03/2026 18:45 (2)
Complete: 🔍
Cache ID: 216::103

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