CVE-2026-53219: linux
Vulnerability summary
CVE-2026-53219 is a medium (CVSS 5.5) vulnerability in linux. EPSS estimates a 0.13% chance of exploitation in the next 30 days, higher than 2.2% of scored vulnerabilities.
Advisory lineage
Upstream 0 · Downstream 36 · Related 36Timeline
- 25-06-2026PublishedVulnerability first disclosed.
- 15-10-2026Last modifiedVulnerability information updated.
Description
In the Linux kernel, the following vulnerability has been resolved: netfilter: x_tables: avoid leaking percpu counter pointers The native and compat get-entries paths copy the fixed rule entry header from the kernelized rule blob to userspace before overwriting the entry's counter fields with a sanitized counter snapshot. On SMP kernels, entry->counters.pcnt contains the percpu allocation address used by x_tables rule counters. A caller can provide a userspace buffer that faults during the initial fixed-header copy after pcnt has been copied but before the later sanitized counter copy runs. The syscall then returns -EFAULT while leaving the raw percpu pointer in userspace. Copy only the fixed entry prefix before counters from the kernelized rule blob, then copy the sanitized counter snapshot into the counter field. Apply this ordering to the IPv4, IPv6, and ARP native and compat get-entries implementations so a fault cannot expose the internal percpu counter pointer.
CVSS metrics
4 scores · 3 sources · 2 versions- OSV · UbuntuEcosystem advisory · calculated5.5MediumCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
- OSV · DebianEcosystem advisory · calculated5.5MediumCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
EPSS trend
Probability
0.13%
Chance of exploitation in the next 30 days
Percentile
2%
Versus all other CVEs
30-day change
0.00 pp
From 0.13% on 19-09-2026
Known exploited
Compare KEV catalogsNot in any of the 3 tracked catalogs.
Public exploits
0 foundNo public exploits indexed.
Weaknesses
CWE · root causeNo weakness data has been published for this record.
Affected systems
Ubuntu168 products
- linuxAll versions (No fix recorded) | < 5.15.0-198.208 | < 6.8.0-146.146 | < 7.0.0-31.31
- linux-allwinner-5.19All versions (No fix recorded)
- linux-awsAll versions (No fix recorded) | < 5.15.0-1117.124 | < 6.8.0-1066.69 | < 7.0.0-1012.12
- linux-aws-5.0All versions (No fix recorded)
- linux-aws-5.11All versions (No fix recorded)
Chainguard13 products
- linux-aws-6.12< 6.12.95-r0
- linux-aws-6.18< 6.18.38-r0
- linux-azure-6.12< 6.12.95-r0
- linux-azure-6.18< 6.18.38-r0
- linux-gcp-6.12< 6.12.95-r0
Linux2 products
- linux≥ 71ae0dff02d756e4d2ca710b79f2ff5390029a5f, < b74ba3343eb44b2cbf7e9665918c287df1d52ebb | ≥ 71ae0dff02d756e4d2ca710b79f2ff5390029a5f, < 0b35dc8527ccc16b7dc34e8a3164313e68cd4e45 | ≥ 71ae0dff02d756e4d2ca710b79f2ff5390029a5f, < b28e2fcad3db7e8687b15bc20bced26b5b7c920e | ≥ 71ae0dff02d756e4d2ca710b79f2ff5390029a5f, < a0d16941adf3a501956d74aefd8d6e217906e79c | ≥ 71ae0dff02d756e4d2ca710b79f2ff5390029a5f, < 8d67e42ad3b1a95a152541015a07110e06992d6c | ≥ 71ae0dff02d756e4d2ca710b79f2ff5390029a5f, < 08a3e218064db11f154ad9ad5541751ea7f34ebe | ≥ 71ae0dff02d756e4d2ca710b79f2ff5390029a5f, < fb0521aff1e10e300d89725cc439d3ea74c828c5 | ≥ 71ae0dff02d756e4d2ca710b79f2ff5390029a5f, < f7f2fbb0e893a0238dc464f8d8c0f5609bec584f | 4.2
- linux_kernel≥ 4.2, < 5.10.259 | ≥ 5.11, < 5.15.210 | ≥ 5.16, < 6.1.176 | ≥ 6.2, < 6.6.143 | ≥ 6.7, < 6.12.94 | ≥ 6.13, < 6.18.36 | ≥ 6.19, < 7.0.13 | 7.1:rc1 | 7.1:rc2 | 7.1:rc3 | 7.1:rc4 | 7.1:rc5 | 7.1:rc6 | 7.1:rc7
Debian1 product
- linux< 6.1.176-1 | < 6.12.94-1 | < 7.0.13-1
4 vendors · 184 products
