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CVE-2026-98857

UnknownEPSS 0.16%

Last modified

CVE-2026-98857 is a vulnerability of currently unknown severity. In the Linux kernel, the following vulnerability has been resolved: ipvs: bound LBLCR and LBLC cache growth ip_vs_lblcr_new() and ip_vs_lblc_new() create cache entries for every previously unseen destination address. The table max_size only tells the periodic collector to reclaim entries after the cache has already exceeded the limit. EPSS estimates a 0.16% chance of exploitation in the next 30 days.

Description

In the Linux kernel, the following vulnerability has been resolved: ipvs: bound LBLCR and LBLC cache growth ip_vs_lblcr_new() and ip_vs_lblc_new() create cache entries for every previously unseen destination address. The table max_size only tells the periodic collector to reclaim entries after the cache has already exceeded the limit. It does not reclaim entries that the attacker continues to use. Reject new cache entries once either table reaches max_size * 3 / 2. The extra headroom lets the periodic collector catch up while the existing scheduler fallback continues to use the selected destination when cache creation fails. New traffic therefore stays serviceable without growing the tables further.

Metrics

EPSS Probability
0.16%

4.7th percentile

Probability of exploitation in the next 30 days. Learn more

Affected Software

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

VendorProductVersions
LinuxLinux>= 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2, < 8b93288b4543ad5139a25a5b211a07bf755652dd; >= 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2, < f6e9446bfb79907d3092fc45a0054b0c3b329bfe; >= 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2, < 488eaba207dd2e4c5afc65e18dc237d70f01d283; >= 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2, < bc9ff8e64771cc32a216953fe615386f46ac1eaa; >= 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2, < 31028d7b970962fbeda1e9131405c76551094300; >= 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2, < 6316d17324bd4ca400c26adb7b656c6e3447c209; >= 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2, < 16c83c047ecfaf226ad81d45d77fa11a3184d0e4; >= 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2, < 2a3c3de660f96865f303fd25f1285f2ffbfd521d
LinuxLinux2.6.12

References

Timeline

Published
Last Modified
Status
Received

Frequently Asked Questions

What is CVE-2026-98857?
In the Linux kernel, the following vulnerability has been resolved: ipvs: bound LBLCR and LBLC cache growth ip_vs_lblcr_new() and ip_vs_lblc_new() create cache entries for every previously unseen destination address. The table max_size only tells the periodic collector to reclaim entries after the cache has already exceeded the limit. It does not reclaim entries that the attacker continues to use. Reject new cache entries once either table reaches max_size * 3 / 2. The extra headroom lets the periodic collector catch up while the existing scheduler fallback continues to use the selected destination when cache creation fails. New traffic therefore stays serviceable without growing the tables further.
How severe is CVE-2026-98857?
Severity scoring for CVE-2026-98857 is pending analysis. The EPSS model estimates a 0.16% probability of exploitation in the next 30 days.
How do I fix CVE-2026-98857?
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