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CVE-2026-99057

UnknownEPSS 0.18%

Last modified

CVE-2026-99057 is a vulnerability of currently unknown severity. In the Linux kernel, the following vulnerability has been resolved: xen/netfront: don't leak the skb when xennet_fill_frags() fails When a response chain has more slots than fit in the skb's frags, xennet_fill_frags() returns an error and xennet_poll() jumps to its error path. That path moves what's left on tmpq to errq to be freed, but the skb being filled was already dequeued from tmpq, so it's never freed. EPSS estimates a 0.18% chance of exploitation in the next 30 days.

Description

In the Linux kernel, the following vulnerability has been resolved: xen/netfront: don't leak the skb when xennet_fill_frags() fails When a response chain has more slots than fit in the skb's frags, xennet_fill_frags() returns an error and xennet_poll() jumps to its error path. That path moves what's left on tmpq to errq to be freed, but the skb being filled was already dequeued from tmpq, so it's never freed. Each chain that overflows leaks the skb and the pages attached to it as frags, and the backend decides how many slots it sends. Put the skb back on tmpq before taking the error path, like the xennet_set_skb_gso() failure just above it does.

Metrics

EPSS Probability
0.18%

7.1th percentile

Probability of exploitation in the next 30 days. Learn more

Affected Software

Source: CNA advisory (CVE.org). NVD analysis pending.

VendorProductVersions
LinuxLinux>= ad4f15dc2c70b1de5e0a64d27335962fbc9cf71c, < 6e6bd1051daabc327233c3ca3d00613fc6783c8e; >= ad4f15dc2c70b1de5e0a64d27335962fbc9cf71c, < 0cf0a25a639c535146c5eb4480d256995721aed6; >= ad4f15dc2c70b1de5e0a64d27335962fbc9cf71c, < 53a131eb2a998c77e2851401b32b712d6c6e8487; >= ad4f15dc2c70b1de5e0a64d27335962fbc9cf71c, < 5051df031144753d3e18862514969146b601d089; >= ad4f15dc2c70b1de5e0a64d27335962fbc9cf71c, < 99011a11c97340ef7290df7dc199305c73fab2f2; >= ad4f15dc2c70b1de5e0a64d27335962fbc9cf71c, < 086944c1c2cbb683543bc3ff08637847b03c8009; >= ad4f15dc2c70b1de5e0a64d27335962fbc9cf71c, < 84e3ea6502b5f14ce8d499d0b6e0e38386274cf0; >= ad4f15dc2c70b1de5e0a64d27335962fbc9cf71c, < 93ccaf1c26e2133396173b76a071e59024daa622; bd1468048aa3e2af865da92990539946d4483989; 29a6193c0d74390c004808441061ac1812cf6f51; 7eced4478f4ec6ff0a603ddfd6e24a5d3831fca7; b73a161e9beff24bf1803ba393dff95a255268f9; >= 4.4.159, < 4.5; >= 4.9.130, < 4.10; >= 4.14.73, < 4.15; >= 4.18.11, < 4.19
LinuxLinux4.19

References

Timeline

Published
Last Modified
Status
Received

Frequently Asked Questions

What is CVE-2026-99057?
In the Linux kernel, the following vulnerability has been resolved: xen/netfront: don't leak the skb when xennet_fill_frags() fails When a response chain has more slots than fit in the skb's frags, xennet_fill_frags() returns an error and xennet_poll() jumps to its error path. That path moves what's left on tmpq to errq to be freed, but the skb being filled was already dequeued from tmpq, so it's never freed. Each chain that overflows leaks the skb and the pages attached to it as frags, and the backend decides how many slots it sends. Put the skb back on tmpq before taking the error path, like the xennet_set_skb_gso() failure just above it does.
How severe is CVE-2026-99057?
Severity scoring for CVE-2026-99057 is pending analysis. The EPSS model estimates a 0.18% probability of exploitation in the next 30 days.
How do I fix CVE-2026-99057?
Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

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Source: NVD / NIST