CVE-2026-53147: linux Out-of-bounds Read
Vulnerability summary
CVE-2026-53147 is a high (CVSS 8.1) Out-of-bounds Read vulnerability in linux. EPSS estimates a 0.27% chance of exploitation in the next 30 days, higher than 17.7% of scored vulnerabilities.
Advisory lineage
Upstream 0 · Downstream 32 · Related 32Timeline
- 25-06-2026PublishedVulnerability first disclosed.
- 19-10-2026Last modifiedVulnerability information updated.
Description
In the Linux kernel, the following vulnerability has been resolved: thunderbolt: Validate XDomain request packet size before type cast tb_xdp_handle_request() casts the received packet buffer to protocol-specific structs without verifying that the allocation is large enough for the target type. A peer can send a minimal XDomain packet that passes the generic header length check but is shorter than the struct accessed after the cast, causing out-of- bounds reads from the kmemdup allocation. Plumb the packet length through xdomain_request_work and validate it against the expected struct size before each cast.
CVSS metrics
6 scores · 5 sources · 2 versions- OSV · UbuntuEcosystem advisory · calculated8.1HighCVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H
- OSV · DebianEcosystem advisory · calculated8.1HighCVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H
- OSV · ChainguardEcosystem advisory · calculated8.1HighCVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H
- NVDNIST8.1HighCVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H
EPSS trend
Probability
0.27%
Chance of exploitation in the next 30 days
Percentile
18%
Versus all other CVEs
30-day change
0.00 pp
From 0.27% 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 causeAffected systems
Ubuntu167 products
- linuxAll versions (No fix recorded) | < 6.8.0-146.146 | < 7.0.0-31.31
- linux-allwinner-5.19All versions (No fix recorded)
- linux-awsAll versions (No fix recorded) | < 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)
Chainguard12 products
- linux-aws-6.12< 6.12.95-r0
- linux-aws-6.18< 6.18.38-r0
- linux-azure-6.18< 6.18.38-r0
- linux-gcp-6.12< 6.12.95-r0
- linux-gcp-6.18< 6.18.38-r0
Linux2 products
- linux≥ cdae7c07e3e3509eaabc18c1640a55dc5b99c179, < a770e62923090d7572f1f5a8507ae551d354a057 | ≥ cdae7c07e3e3509eaabc18c1640a55dc5b99c179, < 0dd61ba03d05187726ecdf9c0e2175a81b9b24f6 | ≥ cdae7c07e3e3509eaabc18c1640a55dc5b99c179, < 79235c8add5da4bf27a12f5a5dbb579f300c059e | ≥ cdae7c07e3e3509eaabc18c1640a55dc5b99c179, < 46da5c3ea011e884028a91cf913db093920a915b | ≥ cdae7c07e3e3509eaabc18c1640a55dc5b99c179, < 07cd2787cdf8942d24a1a3ef81aa89b526fb6381 | ≥ cdae7c07e3e3509eaabc18c1640a55dc5b99c179, < a504b9f2797b739e0304d537e8aa4ce883ecce39 | 4.15
- linux_kernel≥ 4.15, < 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 · 182 products
