CVE-2022-36879 — An issue was discovered in the Linux kernel through 5.18.14. xfrm_expand_policies in net/xfrm...

Triage

Is it exploited, how likely is exploitation, what does it touch, and how severe do the sources call it.

CISA SSVC assessment CISA

Three decision points CISA publishes for the CVEs it assesses (SSVC 2.0.3). A stakeholder decision, not a severity score.

Remediation

Fixes and mitigations documented by the sources — linked to the original advisory.

• Documented patch — git.kernel.org (NIST National Vulnerability Database)
• Documented patch — github.com (NIST National Vulnerability Database)

First 24 hours

Ordered from the record’s own fields — exposure first, because you cannot patch what you have not found. A rule-generated starting point.

1. Identify exposed assets running the affected vendor/product/version combinations (Debian Debian Linux, Linux Linux Kernel, Netapp A700s Firmware…).
2. Apply the fixed version or the patch documented under Remediation.
3. Search available logs for exploit probes, errors and authentication anomalies.

Affected scope

Vendor, product and versions as the sources word them.

Attack characteristics

The CVSS vector, decoded. It describes the attack, not your exposure to it.

Every base score collected

Sources score independently and may disagree; each row says who scored it and under which version.

Detection

Read off the CVSS vector and the weakness class. Starting points, not tested rules.

• Local/physical vector: focus on endpoint telemetry (EDR) from affected hosts.

Timeline

What happened to this CVE, newest first.

• 2026
• SSVC assessment updated
  Oct 14, 2026 · CVE Program (cve.org) e CISA ADP
• Record published
  Oct 14, 2026
• Fix documented
  Oct 14, 2026 · NIST National Vulnerability Database
• Affected products added · linux/linux kernel, debian/debian linux, netapp/a700s firmware, netapp/active iq unified manager, netapp/e-series santri
  Oct 14, 2026 · NIST National Vulnerability Database
• CVSS changed · 5.5
  Oct 14, 2026 · NIST National Vulnerability Database
• Source status changed · → Modified
  Oct 14, 2026 · NIST National Vulnerability Database
• Record created in this database
  Oct 14, 2026 · Alertas do Telegram
• 2022
• CVE published
  Jul 27, 2022 · mitre

Source activity

Repeated readings are counted rather than listed.

• 2× References added · Oct 14, 2026 – Oct 14, 2026
• 1× Official description updated · Oct 14, 2026 – Oct 14, 2026

References

11 on the record

• github.com/torvalds/linux/commit/f85daf0e725358be78dfd208dea5fd665d8cb901
  Patch, Third Party Advisory, x_refsource_MISC, NIST National Vulnerability Database
• git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit
  Mailing List, Patch, Third Party Advisory, x_refsource_MISC, NIST National Vulnerability Database
• cert-portal.siemens.com/productcert/html/ssa-419740.html
  NIST National Vulnerability Database
• github.com/advisories/GHSA-wwxv-fc92-xrw3
  GitHub Security Advisories
• nvd.nist.gov/vuln/detail/CVE-2022-36879
  GitHub Security Advisories
• security.netapp.com/advisory/ntap-20220901-0007
  GitHub Security Advisories
• lists.debian.org/debian-lts-announce/2022/09/msg00011.html
  Mailing List, Third Party Advisory, mailing-list, x_refsource_MLIST, NIST National Vulnerability Database
• cert-portal.siemens.com/productcert/html/ssa-794697.html
  NIST National Vulnerability Database
• lists.debian.org/debian-lts-announce/2022/10/msg00000.html
  Mailing List, Third Party Advisory, mailing-list, x_refsource_MLIST, NIST National Vulnerability Database
• www.debian.org/security/2022/dsa-5207
  Third Party Advisory, vendor-advisory, x_refsource_DEBIAN, NIST National Vulnerability Database
• security.netapp.com/advisory/ntap-20220901-0007/
  Third Party Advisory, x_refsource_CONFIRM, NIST National Vulnerability Database

Elsewhere on this site

Related CVEs (same products)

• Medium CVE-2026-98164 KVM: x86/mmu: Check write tracking in all address spaces 16d
• High CVE-2026-98163 cgroup: Avoid iteration of dying tasks with zero refcount 19d
• Medium CVE-2026-98162 smb/server: fix tree connection leak in smb2_tree_connect() 20d
• High CVE-2026-98156 drm/virtio: use the DMA API for resource backing on Xen 20d
• Medium CVE-2026-98159 wifi: mt76: mt7921: validate CLC firmware records 20d
• Medium CVE-2026-98137 ntfs: treat any nonzero dio zero-range return as an error 20d

Not in any source we poll

Listed rather than left blank: an empty field and an unmeasured one look identical on screen, and only one is a reason to look elsewhere.

• No CWE classification.
• No confirmed IOCs, IP addresses, domains, file hashes, or malware artifacts supplied.
• No organization-specific asset inventory, compensating-control status, or patch deployment evidence supplied.
• No exploit packet captures, log samples, or incident case IDs supplied.

Answered from this record

Text assembled only from the fields above — no additional claims.

What should defenders know first?

CVE-2022-36879 is "An issue was discovered in the Linux kernel through 5.18.14. xfrm_expand_policies in net/xfrm...", rated Medium. It affects Debian Linux (Debian); versions are in the scope table. It is not in CISA KEV, which does not rule out exploitation. CVSS 5.5 describes technical severity. EPSS 0.32% estimates the probability of exploitation in 30 days; neither replaces your asset context. First verify whether exposed or business-critical assets run the affected versions, apply vendor fixes or mitigations, and preserve logs for review.

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