CVE-2024-36927

MEDIUMNVD 4.74.7
EchelonGraph scoreMEDIUM confidence

“—” beside the score: it is equal to NVD's CVSS score.

This medium-severity CVE scores 4.7 under NVD CVSS v3. EPSS exploit probability: 0.2% (7th percentile of EPSS-scored CVEs). No GitHub Security Advisory CVSS is on record for this CVE.

Triggered by: Headline CVSS from NVD CVSS v3
Sources: EPSS, NVD CVSS v3
4.7EG
EchelonGraph verdictMonitorRemediate within your standard update timelines (the SSVC decision on this page).
  • Lower severity and no public exploit yet
CISA-KEV: Not listedEPSS PROB: 0.2%CVSS: 4.7Exploit: None knownExposed services: Not assessed

A fix is available — apply it.

In the Linux kernel, the following vulnerability has been resolved:

ipv4: Fix uninit-value access in __ip_make_skb()

KMSAN reported uninit-value access in __ip_make_skb() [1]. __ip_make_skb() tests HDRINCL to know if the skb has icmphdr. However, HDRINCL can cause a race condition. If calling setsockopt(2) with IP_HDRINCL changes HDRINCL while __ip_make_skb() is running, the function will access icmphdr in the skb even if it is not included. This causes the issue reported by KMSAN.

Check FLOWI_FLAG_KNOWN_NH on fl4->flowi4_flags instead of testing HDRINCL on the socket.

Also, fl4->fl4_icmp_type and fl4->fl4_icmp_code are not initialized. These are union in struct flowi4 and are implicitly initialized by flowi4_init_output(), but we should not rely on specific union layout.

Initialize these explicitly in raw_sendmsg().

[1] BUG: KMSAN: uninit-value in __ip_make_skb+0x2b74/0x2d20 net/ipv4/ip_output.c:1481 __ip_make_skb+0x2b74/0x2d20 net/ipv4/ip_output.c:1481 ip_finish_skb include/net/ip.h:243 [inline] ip_push_pending_frames+0x4c/0x5c0 net/ipv4/ip_output.c:1508 raw_sendmsg+0x2381/0x2690 net/ipv4/raw.c:654 inet_sendmsg+0x27b/0x2a0 net/ipv4/af_inet.c:851 sock_sendmsg_nosec net/socket.c:730 [inline] __sock_sendmsg+0x274/0x3c0 net/socket.c:745 __sys_sendto+0x62c/0x7b0 net/socket.c:2191 __do_sys_sendto net/socket.c:2203 [inline] __se_sys_sendto net/socket.c:2199 [inline] __x64_sys_sendto+0x130/0x200 net/socket.c:2199 do_syscall_64+0xd8/0x1f0 arch/x86/entry/common.c:83 entry_SYSCALL_64_after_hwframe+0x6d/0x75

Uninit was created at: slab_post_alloc_hook mm/slub.c:3804 [inline] slab_alloc_node mm/slub.c:3845 [inline] kmem_cache_alloc_node+0x5f6/0xc50 mm/slub.c:3888 kmalloc_reserve+0x13c/0x4a0 net/core/skbuff.c:577 __alloc_skb+0x35a/0x7c0 net/core/skbuff.c:668 alloc_skb include/linux/skbuff.h:1318 [inline] __ip_append_data+0x49ab/0x68c0 net/ipv4/ip_output.c:1128 ip_append_data+0x1e7/0x260 net/ipv4/ip_output.c:1365 raw_sendmsg+0x22b1/0x2690 net/ipv4/raw.c:648 inet_sendmsg+0x27b/0x2a0 net/ipv4/af_inet.c:851 sock_sendmsg_nosec net/socket.c:730 [inline] __sock_sendmsg+0x274/0x3c0 net/socket.c:745 __sys_sendto+0x62c/0x7b0 net/socket.c:2191 __do_sys_sendto net/socket.c:2203 [inline] __se_sys_sendto net/socket.c:2199 [inline] __x64_sys_sendto+0x130/0x200 net/socket.c:2199 do_syscall_64+0xd8/0x1f0 arch/x86/entry/common.c:83 entry_SYSCALL_64_after_hwframe+0x6d/0x75

CPU: 1 PID: 15709 Comm: syz-executor.7 Not tainted 6.8.0-11567-gb3603fcb79b1 #25 Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.16.3-1.fc39 04/01/2014

CVSS v3
4.7
EG Score
4.7MEDIUMmedium confidence
EG Risk
21
EG Risk 21/100

EG Risk is EchelonGraph's 0–100 priority score. It fuses impact severity (EG Severity, the CVSS base score, never the KEV-floored or EPSS-lifted EG Score) with real-world exploitation and automatability, under weights EchelonGraph set by hand, so you can rank equal-severity CVEs and fix the most dangerous first. Higher = act sooner.

How it’s computed (value × EchelonGraph’s weight)
Severity47% × 45%
Impact severity (EG Severity): CVSS 4.7 of 10. Never the KEV-floored or EPSS-lifted EG Score.
Exploitation0.2% × 40%
FIRST EPSS: the 30-day exploitation probability when EchelonGraph scored this CVE.
Automatability0% × 15%
CISA's SSVC Automatable value: no (Vulnrichment).
SSVC (CISA's decision table, applied by EchelonGraph): Track at every mission impact level.
Exploitation none (CISA Vulnrichment) · Automatable no (CISA Vulnrichment) · Technical impact partial (CISA Vulnrichment). All three are CISA's SSVC values (Vulnrichment). EchelonGraph applied CISA's decision table to them; CISA publishes SSVC inputs and the table, not a decision for each CVE.
Action: A fix is available. Apply it within your standard update timelines.
EPSS PROB
0.2%
EPSS %ILE
7th
KEV
Not listed

What the EG score is made of (scorer v4.0: the three questions the 0–10 score mixes, published apart · methodology)

The EG score (4.7): severity, escalated by confirmed exploitation. This CVE's 4.7 is its impact severity (EG Severity), not escalated.

EG Severity
4.7 MEDIUMCVSS-B, impact only: no KEV listing, EPSS or EG-KEV tier raises it.NVD CVSS v3 · CVSS v3.0 or v3.1
EG Likelihood
0.2% within 30 daysSource: FIRST EPSS (model v2026.06.15, score date 2026-10-17). FIRST's exploitation probability, not an EchelonGraph model.
Confirmed exploitation
None on record (CISA KEV, EG-KEV Tier 1)Reported apart from the likelihood: an observed fact, not a probability.
EG Priority
SSVC Track at medium mission impactTrack at every mission impact level.CISA BOD 26-04: 60 days if the affected system is publicly exposed; Fix on system upgrade if it is not.Each input and its source: the SSVC and BOD 26-04 blocks below.

SSVC (CISA's decision table, applied by EchelonGraph)Track at every mission impact level.

A fix is available. Apply it within your standard update timelines.

Exploitation none (CISA Vulnrichment) · Automatable no (CISA Vulnrichment) · Technical impact partial (CISA Vulnrichment). All three are CISA's SSVC values (Vulnrichment). EchelonGraph applied CISA's decision table to them; CISA publishes SSVC inputs and the table, not a decision for each CVE. Mission impact is CISA's Mission & Well-being decision point, and only you can judge it. CISA's table makes it high when Mission Prevalence is Essential — the vulnerable component "directly provides capabilities that constitute at least one MEF for at least one entity" (MEF: mission essential function) — or when Public Well-Being Impact is Irreversible: "multiple fatalities are likely", the cyber-physical system "is likely lost or destroyed", "extreme or serious externalities" are imposed on other parties, or social systems such as elections or the financial grid "are destabilized and potentially collapse". CISA's decision table

BOD 26-04 (CISA's remediation timeline, Table 1)60 days if the affected system is publicly exposed; Fix on system upgrade if it is not.

In CISA KEV no (CISA's KEV catalog) · Automatable no (CISA Vulnrichment) · Technical impact partial (CISA Vulnrichment). Whether your system is publicly exposed is yours to answer. BOD 26-04 binds US Federal Civilian Executive Branch agencies; for anyone else it is CISA's published timeline, a reference rather than an obligation. The directive · how EchelonGraph applies it

Published

May 30, 2024

Last Modified

October 15, 2026

Advisory Details (7)

Auto-updated Jul 19, 2026
Patch available.
Web pageMentions a patch (unverified)

[SECURITY] [DLA 4271-1] linux-6.1 security update

https://lists.debian.org/debian-lts-announce/2025/08/msg00010.html
Web page

ipv4: Fix uninit-value access in __ip_make_skb() - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/fc1092f51567277509563800a3c56732070b6aa4
Web page

ipv4: Fix uninit-value access in __ip_make_skb() - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/f5c603ad4e6fcf42f84053e882ebe20184bb309e
Web page

ipv4: Fix uninit-value access in __ip_make_skb() - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/5db08343ddb1b239320612036c398e4e1bb52818
Web page

ipv4: Fix uninit-value access in __ip_make_skb() - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/88c66f1879f322f11de34d37b2d3d87497afdcb6
Web page

ipv4: Fix uninit-value access in __ip_make_skb() - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/55bf541e018b76b3750cb6c6ea18c46e1ac5562e
Web page

ipv4: Fix uninit-value access in __ip_make_skb() - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/20d3eb00ab81462d554ac6d09691b8d9aa5a5741

Patch Availability(20)

Patches are aggregated from vendor advisories (Red Hat, Microsoft, Cisco, GitHub) and package ecosystems (OSV, GHSA). Multiple rows for the same upstream release have been deduplicated.

Affected Packages

(5 across 4 ecosystems)
Debian:11(2)
PackageVulnerable rangeFix by version rangeDependents
linux5.10.103-1 ... 5.10.92-2 (48 versions)
  • every version up to 5.10.249-1: fixed in 5.10.249-1
—
linux-6.16.1.106-3~deb11u1 ... 6.1.137-1~deb11u1 (8 versions)
  • every version up to 6.1.140-1~deb11u1: fixed in 6.1.140-1~deb11u1
—
Debian:12(1)
PackageVulnerable rangeFix by version rangeDependents
linux6.1.106-1 ... 6.1.99-1 (40 versions)
  • every version up to 6.1.140-1: fixed in 6.1.140-1
—
Debian:13(1)
PackageVulnerable rangeFix by version rangeDependents
linux—
  • every version up to 6.8.11-1: fixed in 6.8.11-1
—
Debian:14(1)
PackageVulnerable rangeFix by version rangeDependents
linux—
  • every version up to 6.8.11-1: fixed in 6.8.11-1
—

Weakness Classification(2)

MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.

Additional Vendor Advisories

(15)

Data Freshness Timeline

(refreshed 7× in last 7d / 37× in last 30d)

Each row is a time one of our pipelines fetched, updated or re-scored this CVE. For example, "NVD update" means NVD published or revised its analysis for this CVE; "MITRE cvelistV5" means we ingested or refreshed it from the CNA feed. An arrow marks a change the record states ("CVSS v3 → 9.1"); EPSS and GHSA rows show the values recorded at that time, not what changed (EPSS values are rounded; hover one for the exact figures). Most recent first.

Showing the most recent 93 of 198 refreshes on record for this CVE.

A repeat, a row identical to one the same pipeline wrote less than 10 seconds earlier, is not a separate refresh and is not counted. 7 repeat rows among the latest 100 are merged into the row they repeat. The 105 oldest rows on record are not shown and were not checked, so the counts can still include repeats.

  1. 2026-10-22 16:31 UTCEPSS rescoreEPSS 0.2% · 7th percentile
  2. 2026-10-21 16:29 UTCEPSS rescoreEPSS 0.2% · 7th percentile
  3. 2026-10-20 16:30 UTCEPSS rescoreEPSS 0.2% · 6th percentile
  4. 2026-10-19 16:29 UTCEPSS rescoreEPSS 0.2% · 6th percentile
  5. 2026-10-18 16:30 UTCEPSS rescoreEPSS 0.2% · 6th percentile
  6. 2026-10-18 07:12 UTCEG score recompute
  7. 2026-10-17 16:31 UTCEPSS rescoreEPSS 0.2% · 6th percentile
  8. 2026-10-16 16:36 UTCEPSS rescoreEPSS 0.2% · 6th percentile
  9. 2026-10-15 16:30 UTCEPSS rescoreEPSS 0.2% · 6th percentile
  10. 2026-10-15 02:11 UTCVendor advisory
  11. 2026-10-15 01:16 UTCEG score recompute
  12. 2026-10-15 01:16 UTCVendor advisory
  13. 2026-10-14 16:30 UTCEPSS rescoreEPSS 0.2% · 5th percentile
  14. 2026-10-13 16:30 UTCEPSS rescoreEPSS 0.2% · 5th percentile
  15. 2026-10-12 17:51 UTCEG score recompute
  16. 2026-10-12 16:31 UTCEPSS rescoreEPSS 0.2% · 5th percentile
  17. 2026-10-11 21:16 UTCEG score recompute
  18. 2026-10-11 16:09 UTCEG score recompute
  19. 2026-10-11 13:46 UTCEPSS rescoreEPSS 0.2% · 5th percentile
  20. 2026-10-10 19:58 UTCEPSS rescoreEPSS 0.2% · 5th percentile
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  25. 2026-10-05 17:41 UTCEPSS rescoreEPSS 0.2% · 5th percentile
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  1. 2026-10-04 23:20 UTCEPSS rescoreEPSS 0.2% · 5th percentile
  2. 2026-10-03 14:24 UTCEPSS rescoreEPSS 0.2% · 5th percentile
  3. 2026-10-01 19:48 UTCEPSS rescoreEPSS 0.2% · 5th percentile
  4. 2026-09-30 19:47 UTCEG score recompute
  5. 2026-09-30 15:01 UTCEPSS rescoreEPSS 0.2% · 5th percentile
  6. 2026-09-29 15:17 UTCEPSS rescoreEPSS 0.2% · 5th percentile
  7. 2026-09-28 13:49 UTCEPSS rescoreEPSS 0.2% · 5th percentile
  8. 2026-09-28 02:02 UTCOSV refresh
  9. 2026-09-27 13:44 UTCEPSS rescoreEPSS 0.2% · 5th percentile
  10. 2026-09-26 15:57 UTCEPSS rescoreEPSS 0.2% · 5th percentile
  11. 2026-09-26 00:23 UTCEPSS rescoreEPSS 0.2% · 5th percentile
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  13. 2026-09-23 13:46 UTCEPSS rescoreEPSS 0.2% · 6th percentile
  14. 2026-09-22 14:46 UTCEPSS rescoreEPSS 0.2% · 6th percentile
  15. 2026-09-21 20:32 UTCEPSS rescoreEPSS 0.2% · 6th percentile
  16. 2026-09-20 20:14 UTCEPSS rescoreEPSS 0.2% · 6th percentile
  17. 2026-09-19 15:40 UTCEPSS rescoreEPSS 0.2% · 6th percentile
  18. 2026-09-18 19:26 UTCEPSS rescoreEPSS 0.2% · 6th percentile
  19. 2026-09-16 14:06 UTCEPSS rescoreEPSS 0.2% · 6th percentile
  20. 2026-09-15 03:08 UTCEPSS rescoreEPSS 0.2% · 6th percentile
  21. 2026-09-13 16:45 UTCEPSS rescoreEPSS 0.2% · 6th percentile
  22. 2026-09-12 14:59 UTCEPSS rescoreEPSS 0.2% · 6th percentile
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  25. 2026-09-08 21:58 UTCEPSS rescoreEPSS 0.2% · 6th percentile
  26. 2026-09-08 09:56 UTCEG score recompute
  27. 2026-09-08 09:56 UTCVendor advisory
  28. 2026-09-07 15:59 UTCEPSS rescoreEPSS 0.2% · 6th percentile
  29. 2026-09-06 13:46 UTCEPSS rescoreEPSS 0.2% · 6th percentile
  30. 2026-09-05 15:26 UTCEPSS rescoreEPSS 0.2% · 6th percentile
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  33. 2026-09-02 14:10 UTCEPSS rescoreEPSS 0.2% · 6th percentile
  34. 2026-09-02 07:14 UTCOSV refresh
  35. 2026-09-01 13:52 UTCEPSS rescoreEPSS 0.2% · 6th percentile
  36. 2026-09-01 04:37 UTCEPSS rescoreEPSS 0.2% · 6th percentile
  37. 2026-08-30 19:15 UTCEPSS rescoreEPSS 0.2% · 6th percentile
  38. 2026-08-30 01:20 UTCEPSS rescoreEPSS 0.2% · 6th percentile
  39. 2026-08-28 21:39 UTCEPSS rescoreEPSS 0.2% · 6th percentile
  40. 2026-08-27 14:23 UTCEPSS rescoreEPSS 0.2% · 6th percentile
  41. 2026-08-26 14:44 UTCEPSS rescoreEPSS 0.2% · 6th percentile
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  44. 2026-08-21 23:47 UTCEPSS rescoreEPSS 0.2% · 6th percentile
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  49. 2026-08-16 14:54 UTCEPSS rescoreEPSS 0.2% · 6th percentile
  50. 2026-08-16 07:10 UTCOSV refresh
  51. 2026-08-16 02:13 UTCEPSS rescoreEPSS 0.2% · 6th percentile
  52. 2026-08-15 01:28 UTCEPSS rescoreEPSS 0.2% · 6th percentile
  53. 2026-08-13 21:59 UTCEPSS rescoreEPSS 0.2% · 6th percentile
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  55. 2026-08-11 13:40 UTCEPSS rescoreEPSS 0.2% · 6th percentile
  56. 2026-08-10 23:58 UTCEPSS rescoreEPSS 0.2% · 6th percentile
  57. 2026-08-09 13:45 UTCEPSS rescoreEPSS 0.2% · 6th percentile
  58. 2026-08-08 16:35 UTCEPSS rescoreEPSS 0.2% · 6th percentile
  59. 2026-08-07 16:25 UTCEPSS rescoreEPSS 0.2% · 6th percentile
  60. 2026-08-06 13:45 UTCEPSS rescoreEPSS 0.2% · 6th percentile
  61. 2026-08-05 19:16 UTCEPSS rescoreEPSS 0.2% · 6th percentile
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  67. 2026-08-01 00:42 UTCOSV refresh
  68. 2026-07-30 16:26 UTCEPSS rescoreEPSS 0.2% · 6th percentile

Frequently asked(5)

What is CVE-2024-36927?
CVE-2024-36927 is a medium-severity vulnerability; its CVE record was published on May 30, 2024. In the Linux kernel, the following vulnerability has been resolved: ipv4: Fix uninit-value access in ipmakeskb() KMSAN reported uninit-value access in ipmakeskb() [1]. ipmakeskb() tests HDRINCL to know if the skb has icmphdr. However, HDRINCL can cause a race condition. If calling setsockopt(2)…
When was the CVE record for CVE-2024-36927 published?
The CVE record for CVE-2024-36927 was published on May 30, 2024. That is the record's publication date; the vulnerability itself may have been made public earlier. EchelonGraph's copy of the record carries a last-modified date of October 15, 2026; the record at its source may have been updated since.
Is CVE-2024-36927 actively exploited?
CVE-2024-36927 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0.2% probability of exploitation in the next 30 days (7th percentile of EPSS-scored CVEs).
What is the CVSS score of CVE-2024-36927?
CVE-2024-36927 has a CVSS v3 base score of 4.7 (NVD).
How do I remediate CVE-2024-36927?
A fix for CVE-2024-36927 is available: update to the fixed version the vendor names in its advisory. The vendor advisories EchelonGraph has for CVE-2024-36927 are linked in the Vendor Advisories panel on this page.

Dependency Blast Radius

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