CVE-2024-27013 — tun: limit printing rate when illegal packet received by tun dev
In the Linux kernel, the following vulnerability has been resolved: tun: limit printing rate when illegal packet received by tun dev vhost_worker will call tun call backs to receive packets. If too many illegal packets arrives, tun_do_read will keep dumping packet contents. When console is enabled, it will costs much more cpu time to dump packet and soft lockup will be detected. net_ratelimit mechanism can be used to limit the dumping rate. PID: 33036 TASK: ffff949da6f20000 CPU: 23 COMMAND: "vhost-32980" #0 [fffffe00003fce50] crash_nmi_callback at ffffffff89249253 #1 [fffffe00003fce58] nmi_handle at ffffffff89225fa3 #2 [fffffe00003fceb0] default_do_nmi at ffffffff8922642e #3 [fffffe00003fced0] do_nmi at ffffffff8922660d #4 [fffffe00003fcef0] end_repeat_nmi at ffffffff89c01663 [exception RIP: io_serial_in+20] RIP: ffffffff89792594 RSP: ffffa655314979e8 RFLAGS: 00000002 RAX: ffffffff89792500 RBX: ffffffff8af428a0 RCX: 0000000000000000 RDX: 00000000000003fd RSI: 0000000000000005 RDI: ffffffff8af428a0 RBP: 0000000000002710 R8: 0000000000000004 R9: 000000000000000f R10: 0000000000000000 R11: ffffffff8acbf64f R12: 0000000000000020 R13: ffffffff8acbf698 R14: 0000000000000058 R15: 0000000000000000 ORIG_RAX: ffffffffffffffff CS: 0010 SS: 0018 #5 [ffffa655314979e8] io_serial_in at ffffffff89792594 #6 [ffffa655314979e8] wait_for_xmitr at ffffffff89793470 #7 [ffffa65531497a08] serial8250_console_putchar at ffffffff897934f6 #8 [ffffa65531497a20] uart_console_write at ffffffff8978b605 #9 [ffffa65531497a48] serial8250_console_write at ffffffff89796558 #10 [ffffa65531497ac8] console_unlock at ffffffff89316124 #11 [ffffa65531497b10] vprintk_emit at ffffffff89317c07 #12 [ffffa65531497b68] printk at ffffffff89318306 #13 [ffffa65531497bc8] print_hex_dump at ffffffff89650765 #14 [ffffa65531497ca8] tun_do_read at ffffffffc0b06c27 [tun] #15 [ffffa65531497d38] tun_recvmsg at ffffffffc0b06e34 [tun] #16 [ffffa65531497d68] handle_rx at ffffffffc0c5d682 [vhost_net] #17 [ffffa65531497ed0] vhost_worker at ffffffffc0c644dc [vhost] #18 [ffffa65531497f10] kthread at ffffffff892d2e72 #19 [ffffa65531497f50] ret_from_fork at ffffffff89c0022f
Who exploits it and how urgent it is
A 0–100 score combining confirmed exploitation, ransomware and APT use, public exploits, EPSS and severity.
How the score was calculated
- EPSS 0.3% (30-day exploitation probability)+3
- Technical severity (medium)+3
The score orders the patch queue; it does not replace your asset context (internet exposure, criticality, compensating controls).
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 — git.kernel.org (NIST National Vulnerability Database)
- Documented patch — git.kernel.org (NIST National Vulnerability Database)
- Documented patch — git.kernel.org (NIST National Vulnerability Database)
- Documented patch — git.kernel.org (NIST National Vulnerability Database)
- Documented patch — git.kernel.org (NIST National Vulnerability Database)
- Documented patch — git.kernel.org (NIST National Vulnerability Database)
- Documented patch — git.kernel.org (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.
- Identify exposed assets running the affected vendor/product/version combinations (Fedoraproject Fedora, Linux Linux, Linux Linux Kernel).
- Apply the fixed version or the patch documented under Remediation.
- Search available logs for exploit probes matching the vulnerability class (denial of service), errors and authentication anomalies.
Affected scope
Vendor, product and versions as the sources word them.
| Vendor | Product | Versions | Status | Source |
|---|---|---|---|---|
| Fedoraproject | Fedora | version 39version 40version 38 | Vulnerable | NIST National Vulnerability Database |
| Linux | Linux |
version 2.6.35≥ ef3db4a5954281bc1ea49a4739c88eaea091dc71 and < f8bbc07ac535593139c875ffa19af924b1084540≥ ef3db4a5954281bc1ea49a4739c88eaea091dc71 and < 52854101180beccdb9dc2077a3bea31b6ad48dfa≥ ef3db4a5954281bc1ea49a4739c88eaea091dc71 and < 40f4ced305c6c47487d3cd8da54676e2acc1a6ad≥ ef3db4a5954281bc1ea49a4739c88eaea091dc71 and < 62e27ef18eb4f0d33bbae8e9ef56b99696a74713≥ ef3db4a5954281bc1ea49a4739c88eaea091dc71 and < a50dbeca28acf7051dfa92786b85f704c75db6eb≥ ef3db4a5954281bc1ea49a4739c88eaea091dc71 and < 14cdb43dbc827e18ac7d5b30c5b4c676219f1421≥ ef3db4a5954281bc1ea49a4739c88eaea091dc71 and < 4b0dcae5c4797bf31c63011ed62917210d3fdac3 and 1 more≥ ef3db4a5954281bc1ea49a4739c88eaea091dc71 and < 68459b8e3ee554ce71878af9eb69659b9462c588 |
Vulnerable | CVE Program (cve.org) e CISA ADP |
| Linux | Linux Kernel |
version 6.9-rc3version 6.9-rc4version 6.9-rc2version 6.9-rc1≥ 6.7 and < 6.8.8≥ 6.2 and < 6.6.29≥ 5.16 and < 6.1.88≥ 5.11 and < 5.15.157 and 3 more≥ 5.5 and < 5.10.216≥ 4.20 and < 5.4.275≥ 2.6.35 and < 4.19.313 |
Vulnerable | NIST National Vulnerability Database |
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.
| Score | Version | Severity | Expl. | Impact | Scored by |
|---|---|---|---|---|---|
| 5.5 | CVSS 3.1 | Medium | 1.8 | 3.6 | nvd@nist.gov via NIST National Vulnerability Database |
| 5.5 | CVSS 3.1 | Medium | — | — | GitHub, Inc. via GitHub Security Advisories |
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H (score shown at the top: nvd@nist.gov) Weakness MITRE
Weakness class according to MITRE’s CWE catalog.
CWE-770 · Allocation of Resources Without Limits or Throttling
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.
- Track CPU/memory spikes and availability drops correlated with request patterns.
Timeline
What happened to this CVE, newest first.
- 2026
- Affected products added · linux/linux
- SSVC assessment updated
- Record published
- Fix documented
- Affected products added · linux/linux kernel, fedoraproject/fedora
- CVSS changed · 5.5
- Source status changed · → Modified
- Record created in this database
- 2024
- CVE published
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
20 on the record
- git.kernel.org/stable/c/f8bbc07ac535593139c875ffa19af924b1084540
- git.kernel.org/stable/c/14cdb43dbc827e18ac7d5b30c5b4c676219f1421
- git.kernel.org/stable/c/40f4ced305c6c47487d3cd8da54676e2acc1a6ad
- git.kernel.org/stable/c/62e27ef18eb4f0d33bbae8e9ef56b99696a74713
- git.kernel.org/stable/c/4b0dcae5c4797bf31c63011ed62917210d3fdac3
- git.kernel.org/stable/c/52854101180beccdb9dc2077a3bea31b6ad48dfa
- git.kernel.org/stable/c/a50dbeca28acf7051dfa92786b85f704c75db6eb
- git.kernel.org/stable/c/68459b8e3ee554ce71878af9eb69659b9462c588
- cert-portal.siemens.com/productcert/html/ssa-613116.html
- github.com/advisories/GHSA-hm85-cqwx-6v52
- cert-portal.siemens.com/productcert/html/ssa-265688.html
- lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/GCBZZE
- lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/DAMSOZ
- nvd.nist.gov/vuln/detail/CVE-2024-27013
- lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/4EZ6PJ
- lists.debian.org/debian-lts-announce/2024/06/msg00020.html
- lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/4EZ6PJ
- lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/DAMSOZ
- lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/GCBZZE
- lists.debian.org/debian-lts-announce/2024/06/msg00017.html
Elsewhere on this site
Related CVEs (same products)
- Critical CVE-2026-99999 ipv4: validate checksum_start before completing checksum 4h
- Unknown CVE-2026-98432 ipv4: free inet_opt and ireq_opt after an RCU grace period 4h
- Unknown CVE-2026-98427 net/sched: codel: bound the dropping loop per dequeue call 1d
- Unknown CVE-2026-98424 wifi: cfg80211: undo netns switch if renaming the wiphy fails 1d
- Unknown CVE-2026-98425 wifi: mac80211: don't warn when an IBSS has no channel to scan 1d
- Unknown CVE-2026-98426 wifi: mwifiex: fix IRQ leak using wrong index in MSI-X error path 1d
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 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-2024-27013 is "tun: limit printing rate when illegal packet received by tun dev", rated Medium. It affects Fedora (Fedoraproject); 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 0.27% 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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