Security readout for executives and security teams
Plain-English summary
CVE-2024-35888 is a Linux kernel networking flaw in ERSPAN/GRE packet handling. A local, low-privileged actor could trigger a crash or denial of service by reaching the vulnerable receive path. It is not listed as CISA KEV, and the provided sources do not show active exploitation.
Executive priority
Treat this as a normal-priority infrastructure patch unless affected systems are mission-critical, difficult to reboot, or part of network monitoring/tunneling infrastructure. There is denial-of-service potential, but no source-provided evidence of active exploitation.
Technical view
The ERSPAN receive functions read the ERSPAN base header before ensuring it is present in the skb linear head area. The kernel fix adds missing pskb_may_pull() checks and reloads the IPv4 header after a pull because skb->head can change. Reported impact is availability, with CVSS 5.5 AV:L/AC:L/PR:L/UI:N.
Likely exposure
Exposure is most relevant to Linux systems running affected kernel versions or downstream products that include them, especially where ERSPAN/GRE handling is enabled or reachable. The CVSS vector indicates local access with low privileges, not unauthenticated remote exploitation.
Exploitation context
The issue was reported by syzbot with a KMSAN uninitialized-value trace through ip6erspan_rcv(), gre_rcv(), and tun write paths. The source bundle marks KEV as false and does not provide evidence of public exploitation.
Researcher notes
Focus validation on the ERSPAN/GRE receive path in net/ipv4/ip_gre.c and net/ipv6/ip6_gre.c. The important fix behavior is ensuring erspan_base_hdr is pulled into skb->head before reading fields, plus reloading pointers after pskb_may_pull() changes skb storage.
Mitigation direction
- Update Linux kernels to vendor releases containing the listed stable fixes.
- Use distribution advisories, including Debian LTS, to identify corrected packages.
- Check Siemens advisories if affected Siemens products exist in inventory.
- If immediate patching is delayed, review vendor guidance for temporary mitigations.
- Track kernel versions against the affected and fixed ranges in the CVE record.
Validation and detection
- Inventory Linux kernel versions across servers, appliances, and embedded systems.
- Confirm whether ERSPAN/GRE functionality is present or enabled on exposed systems.
- Verify installed packages include the relevant stable kernel fix commits.
- Review vendor advisories for downstream product-specific affected versions.
- Monitor crash logs for ERSPAN, GRE, skb, or KMSAN-related kernel traces.
Public sources used
Generated from the cited source records. This long-tail analysis has not been individually reviewed by a named human.
Conservative CVE-to-ATT&CK context
These mappings and lookup hints may be relevant to the vulnerability behavior, CWE, affected product, or exposure path. Glexia-inferred context is not an official MITRE, ATT&CK, CWE, or CVE Program mapping.
ATT&CK lookup starting points
Use these exact CWE pages and searches to review the Glexia ATT&CK library from this CVE's weakness and description context.
CVE-2024-35888 mapping review
Open the CVE-to-ATT&CK bridge for reviewed, inferred, or future official mappings tied to this CVE.
Open ATT&CK lookup- Severity
- Medium
- CVSS
- 5.5 (3.1)
- Known Exploited
- No
- Published
Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
CNA and ADP enrichment extracted from CVE v5
These fields come from the CVE record and ADP containers, not from Glexia's Take. They preserve time-varying source decisions such as CISA SSVC, KEV status, CVSS metrics, and provider references.
SSVC decision data
CVSS vector scores
1 official scoreWe collect every scored CVSS vector available in the official CNA and ADP containers. When more than one version is present, the table keeps the source vectors side by side instead of collapsing them into the highest score.
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H1.83.6CISA-ADPVulnerability scoring details
Base CVSS 3.1 score
5.5MediumVector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Vulnerability timeline
Timeline events are normalized from CVE metadata, CNA source timelines, ADP timelines, and KEV metadata when present.
- CVE reservedCVE Program
The CVE ID was reserved by the assigning CNA.
- CVE publishedCVE Program
The CVE record was published.
- CVE updatedCVE Program
The CVE record metadata indicates this as the latest update time.
ADP provider summaries
Source materials
- CVE List V5 sourceCVE List V5
- https://git.kernel.org/stable/c/06a939f72a24a7d8251f84cf4c042df86c6666acCVE reference, Linux
- https://git.kernel.org/stable/c/e54a0c79cdc2548729dd7e2e468b08c5af4d0df5CVE reference, Linux
- https://git.kernel.org/stable/c/b14b9f9503ec823ca75be766dcaeff4f0bfeca85CVE reference, Linux
- https://git.kernel.org/stable/c/ee0088101beee10fa809716d6245d915b09c37c7CVE reference, Linux
- https://git.kernel.org/stable/c/1db7fcb2b290c47c202b79528824f119fa28937dCVE reference, Linux
- https://git.kernel.org/stable/c/4e3fdeecec5707678b0d1f18c259dadb97262e9dCVE reference, Linux
- https://git.kernel.org/stable/c/0ac328a5a4138a6c03dfc3f46017bd5c19167446CVE reference, Linux
- https://git.kernel.org/stable/c/17af420545a750f763025149fa7b833a4fc8b8f0CVE reference, Linux
- https://lists.debian.org/debian-lts-announce/2024/06/msg00017.htmlCVE reference, CVE · x_transferred
- https://lists.debian.org/debian-lts-announce/2024/06/msg00020.htmlCVE reference, CVE · x_transferred
- https://cert-portal.siemens.com/productcert/html/ssa-398330.htmlCVE reference, siemens-SADP
- https://cert-portal.siemens.com/productcert/html/ssa-265688.htmlCVE reference, siemens-SADP
Products and packages named in the record
CWE details
CWE links open Glexia weakness intelligence pages with official CWE context, developer remediation guidance, and related CVE mappings.