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Review reviewHigh

CVE-2026-53362

Linux Linux, linux kernel

In the Linux kernel, the following vulnerability has been resolved: ipv6: account for fraggap on the paged allocation path In __ip6_append_data(), when the paged-allocation branch is taken (MSG_MORE / NETIF_F_SG / large fraglen), alloclen and pagedlen are computed as alloclen = fragheaderlen + transhdrlen; pagedlen = datalen - transhdrlen; datalen already includes fraggap (datalen = length + fraggap). When fraggap is non-zero, this is not the first skb and transhdrlen is zero. The fraggap bytes carried over from the previous skb are copied just past the fragment headers in the new skb's lin...

CVSS
7.8
EPSS
0.27%
18.3% percentile
CISA KEV
Not listed
Published
2026.07.04
PRIORITY ASSESSMENT

Review review

The CVSS severity warrants an early asset and exposure review.

Known exploitationNot established by KEV
Exploit probability0.27%
Technical severityCVSS 7.8

Vulnerability overview

In the Linux kernel, the following vulnerability has been resolved: ipv6: account for fraggap on the paged allocation path In __ip6_append_data(), when the paged-allocation branch is taken (MSG_MORE / NETIF_F_SG / large fraglen), alloclen and pagedlen are computed as alloclen = fragheaderlen + transhdrlen; pagedlen = datalen - transhdrlen; datalen already includes fraggap (datalen = length + fraggap). When fraggap is non-zero, this is not the first skb and transhdrlen is zero. The fraggap bytes carried over from the previous skb are copied just past the fragment headers in the new skb's lin...

Affected product and versions

Product
Linux Linux, linux kernel
Affected versions
>= 773ba4fe9104a64a54d1c00f0fb6ffb95def2b03 < 14200d435af9a9eeb444f529fc2f689a236b7962, >= 773ba4fe9104a64a54d1c00f0fb6ffb95def2b03 < 65fb14cbebb0cd0eff903a22d33537ddc8b95769, >= 773ba4fe9104a64a54d1c00f0fb6ffb95def2b03 < 46f201f8b4c39633a1fa3dc12459f506d470993d, >= 773ba4fe9104a64a54d1c00f0fb6ffb95def2b03 < 6374fb9edf72c67a118a2c214a0dddd04c921e0a, >= 773ba4fe9104a64a54d1c00f0fb6ffb95def2b03 < e9eacf19281ea2498b36291b56c9606118c2d74e, >= 773ba4fe9104a64a54d1c00f0fb6ffb95def2b03 < 736b380e28d0480c7bc3e022f1950f31fe53a7c5, >= 6.0, >= 6.0 < 6.1.177, >= 6.2 < 6.6.144, >= 6.7 < 6.12.95, >= 6.13 < 6.18.38, >= 6.19 < 7.1.3
Fixed versions
6.1.177, 6.6.144, 6.12.95, 6.18.38, 7.1.3

Recommended response sequence

Confirm exposure before applying a vendor-supported change.

Full remediation guide
  1. 1
    Identify

    Confirm that Linux Linux, linux kernel and an affected version are present.

  2. 2
    Prioritize

    Combine exploitation signals with asset exposure and business criticality.

  3. 3
    Remediate

    Follow the vendor advisory or supported update path and preserve rollback options.

  4. 4
    Verify

    Recheck the version, service health, access paths, and relevant logs.

Technical data

CVSS vector
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
CWE
Not available