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CVE-2025-37879Patch(debian / debian_linux)

LOWCVSS 7.1 · HIGH

Signal is active with 1 mentions in latest observed window

Immediate actions

  • Patch debian debian_linux systems immediately

Recommended action window: Monitor and triage in normal cycle

NVD description

In the Linux kernel, the following vulnerability has been resolved: 9p/net: fix improper handling of bogus negative read/write replies In p9_client_write() and p9_client_read_once(), if the server incorrectly replies with success but a negative write/read count then we would consider written (negative) <= rsize (positive) because both variables were signed. Make variables unsigned to avoid this problem. The reproducer linked below now fails with the following error instead of a null pointer deref: 9pnet: bogus RWRITE count (4294967295 > 3)

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1.0/ 10 priority

Sources & remediation

Patch / fix
Vendor / third-party advisories
Weakness type (CWE)
CWE-125

Priority

LOW

Exploitation

NONE

PoC

NONE

Patch

AVAILABLE

Momentum

NONE

Are you affected?

If you run products in this scope, you should treat this CVE as relevant to your environment.

  • debian_linux
  • linux_kernel

Threat summary

  • Patch or workaround signal is available
  • 1 mentions across 1 observed day

What's happening

  • Patch or workaround mentioned in 1 signal
  • 1 total mentions across 1 day

Affected systems

Vendors
debianlinux
Products
debian_linuxlinux_kernel

1 version affected across 2 products

Deep dive

Activity timeline1 mentions / 1d
00111Mentions · 2026-08-11: 1Patch / Workaround · 2026-08-11: 108-11
Signal classification1 categories
Patch
1100.0%
Referenced assets1 URL
Full discourse1 post
  • Windows Forum@windowsforum
    Patch

    🐧 Azure Linux needs a CVE-2025-37879 update; WSL 2 already has the fix. Same kernel neighborhood, wildly different patch status—Microsoft’s security labels need a footnote. https://windowsforum.com/security-alerts.84/cve-2025-37879-azure-linux-needs-updates-wsl-2-is-patched.442312/?utm_source=x&utm_medium=social&utm_campaign=news_node84 #AzureLinux #LinuxKernelSecurity #Cve202537879 #Wsl2 https://t.co/vhYS2Q2ZXR

    Post summary

    The tweet alerts that Azure Linux still lacks an update for CVE‑2025‑37879, whereas WSL 2 has already been patched, highlighting a patch status discrepancy.

    0000055
    1.3K followersView on X
CPE platform detail2 entries

2 of 2 entries

PartVendorProductVersionTarget SWTarget HW
OSdebiandebian_linux11.0--
OSlinuxlinux_kernel---

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