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CVE-2026-23247

In the Linux kernel, the following vulnerability has been resolved: tcp: secure_seq: add back ports to TS offset This reverts 28ee1b746f49 ("secure_seq: downgrade to per-host timestamp offsets") tcp_tw_recycle went away in 2017. Zhouyan Deng reported off-path TCP source port leakage via SYN cookie side-channel that can be fixed in multiple ways. One of them is to bring back TCP ports in TS offset randomization. As a bonus, we perform a single siphash() computation to provide both an ISN an
Lifecycle PUBLISHED1 preserved revisionFact urn:baitaphish:canonical-cve-fact-revision:v2:ba56d2150a69876d83cc25c2fff4c2269ff2f23a3bce85f3d3ca8ba0eb5be49d
Known exploited
Not asserted
Disputed
No
Stale source
No
Conflicts
1

Preserved source conflicts

No provider value was silently selected as the winner.

affected · 2 assertions

{"defaultStatus":"unaffected","product":"Linux","programFiles":["include/net/secure_seq.h","include/net/tcp.h","net/core/secure_seq.c","net/ipv4/syncookies.c","net/ipv4/tcp_input.c","net/ipv4/tcp_ipv4.c","net/ipv6/syncookies.c","net/ipv6/tcp_ipv6.c"],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","vendor":"Linux","versions":[{"lessThan":"5da5662181ef8a251e3ba564903002c2e87de452","status":"affected","version":"28ee1b746f493b7c62347d714f58fbf4f70df4f0","versionType":"git"},{"lessThan":"eae2f14ab2efccdb7480fae7d42c4b0116ef8805","status":"affected","version":"28ee1b746f4…

  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:e636ed9c15e55055ea0c957c7902fb5e3e4f486b0438c3b2d25e55d19b352d7e · sha256:7fedfb9d753e3766… · /containers/cna/affected/0

{"defaultStatus":"affected","product":"Linux","programFiles":["include/net/secure_seq.h","include/net/tcp.h","net/core/secure_seq.c","net/ipv4/syncookies.c","net/ipv4/tcp_input.c","net/ipv4/tcp_ipv4.c","net/ipv6/syncookies.c","net/ipv6/tcp_ipv6.c"],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","vendor":"Linux","versions":[{"status":"affected","version":"4.11"},{"lessThan":"4.11","status":"unaffected","version":"0","versionType":"semver"},{"lessThanOrEqual":"6.12.*","status":"unaffected","version":"6.12.94","versionType":"semver"},{"lessThanOrEqual":"6.18.*","status"…

  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:e636ed9c15e55055ea0c957c7902fb5e3e4f486b0438c3b2d25e55d19b352d7e · sha256:7fedfb9d753e3766… · /containers/cna/affected/1

Affected products and versions

2 source assertions
{"defaultStatus":"unaffected","product":"Linux","programFiles":["include/net/secure_seq.h","include/net/tcp.h","net/core/secure_seq.c","net/ipv4/syncookies.c","net/ipv4/tcp_input.c","net/ipv4/tcp_ipv4.c","net/ipv6/syncookies.c","net/ipv6/tcp_ipv6.c"],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","vendor":"Linux","versions":[{"lessThan":"5da5662181ef8a251e3ba564903002c2e87de452","status":"affected","version":"28ee1b746f493b7c62347d714f58fbf4f70df4f0","versionType":"git"},{"lessThan":"eae2f14ab2efccdb7480fae7d42c4b0116ef8805","status":"affected","version":"28ee1b746f4…
  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:e636ed9c15e55055ea0c957c7902fb5e3e4f486b0438c3b2d25e55d19b352d7e · sha256:7fedfb9d753e3766… · /containers/cna/affected/0
{"defaultStatus":"affected","product":"Linux","programFiles":["include/net/secure_seq.h","include/net/tcp.h","net/core/secure_seq.c","net/ipv4/syncookies.c","net/ipv4/tcp_input.c","net/ipv4/tcp_ipv4.c","net/ipv6/syncookies.c","net/ipv6/tcp_ipv6.c"],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","vendor":"Linux","versions":[{"status":"affected","version":"4.11"},{"lessThan":"4.11","status":"unaffected","version":"0","versionType":"semver"},{"lessThanOrEqual":"6.12.*","status":"unaffected","version":"6.12.94","versionType":"semver"},{"lessThanOrEqual":"6.18.*","status"…
  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:e636ed9c15e55055ea0c957c7902fb5e3e4f486b0438c3b2d25e55d19b352d7e · sha256:7fedfb9d753e3766… · /containers/cna/affected/1

Source references

4 source assertions
{"url":"https://git.kernel.org/stable/c/165573e41f2f66ef98940cf65f838b2cb575d9d1"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:e636ed9c15e55055ea0c957c7902fb5e3e4f486b0438c3b2d25e55d19b352d7e · sha256:7fedfb9d753e3766… · /containers/cna/references/3
{"url":"https://git.kernel.org/stable/c/46e5b0d7cf55821527adea471ffe52a5afbd9caf"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:e636ed9c15e55055ea0c957c7902fb5e3e4f486b0438c3b2d25e55d19b352d7e · sha256:7fedfb9d753e3766… · /containers/cna/references/2
{"url":"https://git.kernel.org/stable/c/5da5662181ef8a251e3ba564903002c2e87de452"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:e636ed9c15e55055ea0c957c7902fb5e3e4f486b0438c3b2d25e55d19b352d7e · sha256:7fedfb9d753e3766… · /containers/cna/references/0
{"url":"https://git.kernel.org/stable/c/eae2f14ab2efccdb7480fae7d42c4b0116ef8805"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:e636ed9c15e55055ea0c957c7902fb5e3e4f486b0438c3b2d25e55d19b352d7e · sha256:7fedfb9d753e3766… · /containers/cna/references/1

Attribution and limitations

  • CVE Program CVEList V5: Reproduce the MITRE copyright designation and CVE license in copies. Source →

Provider severity values are preserved separately. Baitaphish does not convert them into a risk rating, infer affected products, or treat EPSS as observed exploitation.

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