CVE-2022-48839

MEDIUMNVD 5.55.5

Also known asEUVD-2022-53718 (ENISA EUVD) · GHSA-qvwc-r3r6-hq25 (GitHub Security Advisories)Source: ENISA EUVD

5.5EG

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: 0.3%CVSS: 5.5Exploit: None knownExposed services: Not assessed

A fix is available — apply it.

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

net/packet: fix slab-out-of-bounds access in packet_recvmsg()

syzbot found that when an AF_PACKET socket is using PACKET_COPY_THRESH and mmap operations, tpacket_rcv() is queueing skbs with garbage in skb->cb[], triggering a too big copy [1]

Presumably, users of af_packet using mmap() already gets correct metadata from the mapped buffer, we can simply make sure to clear 12 bytes that might be copied to user space later.

BUG: KASAN: stack-out-of-bounds in memcpy include/linux/fortify-string.h:225 [inline] BUG: KASAN: stack-out-of-bounds in packet_recvmsg+0x56c/0x1150 net/packet/af_packet.c:3489 Write of size 165 at addr ffffc9000385fb78 by task syz-executor233/3631

CPU: 0 PID: 3631 Comm: syz-executor233 Not tainted 5.17.0-rc7-syzkaller-02396-g0b3660695e80 #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Call Trace: __dump_stack lib/dump_stack.c:88 [inline] dump_stack_lvl+0xcd/0x134 lib/dump_stack.c:106 print_address_description.constprop.0.cold+0xf/0x336 mm/kasan/report.c:255 __kasan_report mm/kasan/report.c:442 [inline] kasan_report.cold+0x83/0xdf mm/kasan/report.c:459 check_region_inline mm/kasan/generic.c:183 [inline] kasan_check_range+0x13d/0x180 mm/kasan/generic.c:189 memcpy+0x39/0x60 mm/kasan/shadow.c:66 memcpy include/linux/fortify-string.h:225 [inline] packet_recvmsg+0x56c/0x1150 net/packet/af_packet.c:3489 sock_recvmsg_nosec net/socket.c:948 [inline] sock_recvmsg net/socket.c:966 [inline] sock_recvmsg net/socket.c:962 [inline] ____sys_recvmsg+0x2c4/0x600 net/socket.c:2632 ___sys_recvmsg+0x127/0x200 net/socket.c:2674 __sys_recvmsg+0xe2/0x1a0 net/socket.c:2704 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x35/0xb0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x44/0xae RIP: 0033:0x7fdfd5954c29 Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 41 15 00 00 90 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 c0 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007ffcf8e71e48 EFLAGS: 00000246 ORIG_RAX: 000000000000002f RAX: ffffffffffffffda RBX: 0000000000000003 RCX: 00007fdfd5954c29 RDX: 0000000000000000 RSI: 0000000020000500 RDI: 0000000000000005 RBP: 0000000000000000 R08: 000000000000000d R09: 000000000000000d R10: 0000000000000000 R11: 0000000000000246 R12: 00007ffcf8e71e60 R13: 00000000000f4240 R14: 000000000000c1ff R15: 00007ffcf8e71e54

addr ffffc9000385fb78 is located in stack of task syz-executor233/3631 at offset 32 in frame: ____sys_recvmsg+0x0/0x600 include/linux/uio.h:246

this frame has 1 object: [32, 160) 'addr'

Memory state around the buggy address: ffffc9000385fa80: 00 04 f3 f3 f3 f3 f3 00 00 00 00 00 00 00 00 00 ffffc9000385fb00: 00 00 00 00 00 00 00 00 00 00 00 f1 f1 f1 f1 00 >ffffc9000385fb80: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 f3 ^ ffffc9000385fc00: f3 f3 f3 00 00 00 00 00 00 00 00 00 00 00 00 f1 ffffc9000385fc80: f1 f1 f1 00 f2 f2 f2 00 f2 f2 f2 00 00 00 00 00 ==================================================================

CVSS v3: 5.5
EG Score: 5.5MEDIUMmedium confidence
EG Risk: 25
EPSS PROB: 0.3%
EPSS %ILE: 19th
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 (5.5): severity, escalated by confirmed exploitation. This CVE's 5.5 is its impact severity (EG Severity), not escalated.

EG Severity: 5.5 MEDIUMCVSS-B, impact only: no KEV listing, EPSS or EG-KEV tier raises it.GitHub Security Advisory CVSS
EG Likelihood: 0.3% within 30 daysSource: FIRST EPSS (model v2026.06.15, score date 2026-10-25). 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, and whom BOD 26-04 binds: 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.

The score's inputs: 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

July 16, 2024

Last Modified

August 5, 2026

References (8)

https://git.kernel.org/stable/c/b9d5772d60f8e7ef34e290f72fc20e3a4883e7d0Mailing List · Patch
https://git.kernel.org/stable/c/b1e27cda1e3c12b705875bb7e247a97168580e33Mailing List · Patch
https://git.kernel.org/stable/c/a33dd1e6693f80d805155b3f69c18c2f642915daMailing List · Patch
https://git.kernel.org/stable/c/268dcf1f7b3193bc446ec3d14e08a240e9561e4dMailing List · Patch
https://git.kernel.org/stable/c/70b7b3c055fd4a464da8da55ff4c1f84269f9b02Mailing List · Patch
https://git.kernel.org/stable/c/a055f5f2841f7522b44a2b1eccb1951b4b03d51aMailing List · Patch
https://git.kernel.org/stable/c/ef591b35176029fdefea38e8388ffa371e18f4b2Mailing List · Patch
https://git.kernel.org/stable/c/c700525fcc06b05adfea78039de02628af79e07aMailing List · Patch

Patch Availability(1)

Vendor / Ecosystem	Fix (by version range) / Patch	Released	Source
linux	Kernel @ 4.9.308 (fixes >=2.6.14)	—	osv

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

(4 across 4 ecosystems)

Debian:11(1)

Package	Vulnerable range	Fix by version range	Dependents
linux	5.10.103-1 ... 5.10.92-2 (11 versions)	every version up to 5.10.113-1: fixed in 5.10.113-1	—

Debian:12(1)

Package	Vulnerable range	Fix by version range	Dependents
linux	—	every version up to 5.17.3-1: fixed in 5.17.3-1	—

Debian:13(1)

Package	Vulnerable range	Fix by version range	Dependents
linux	—	every version up to 5.17.3-1: fixed in 5.17.3-1	—

Debian:14(1)

Package	Vulnerable range	Fix by version range	Dependents
linux	—	every version up to 5.17.3-1: fixed in 5.17.3-1	—

Weakness Classification(1)

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

CWE-125Out-of-bounds Read

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 98 of 206 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. 2 repeat rows among the latest 100 are merged into the row they repeat. The 108 oldest rows on record are not shown and were not checked, so the counts can still include repeats.

2026-11-02 16:39 UTCEPSS rescoreEPSS 0.3% · 19th percentile
2026-11-01 16:30 UTCEPSS rescoreEPSS 0.3% · 19th percentile
2026-10-31 16:29 UTCEPSS rescoreEPSS 0.3% · 19th percentile
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2026-10-27 16:28 UTCEPSS rescoreEPSS 0.3% · 18th percentile
2026-10-26 16:28 UTCEPSS rescoreEPSS 0.3% · 18th percentile
2026-10-25 17:55 UTCEG score recompute
2026-10-25 16:29 UTCEPSS rescoreEPSS 0.3% · 18th percentile
2026-10-24 18:05 UTCEG score recompute
2026-10-24 18:05 UTCGHSA enrichmentGHSA-qvwc-r3r6-hq25 · GitHub CVSS 5.5
2026-10-24 16:29 UTCEPSS rescoreEPSS 0.3% · 18th percentile
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2026-10-22 16:30 UTCEPSS rescoreEPSS 0.3% · 18th percentile
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2026-10-20 16:29 UTCEPSS rescoreEPSS 0.3% · 17th percentile
2026-10-19 16:28 UTCEPSS rescoreEPSS 0.3% · 17th percentile
2026-10-19 11:55 UTCOSV refresh
2026-10-18 16:29 UTCEPSS rescoreEPSS 0.3% · 17th percentile
2026-10-18 08:21 UTCEG score recompute
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2026-10-13 16:29 UTCEPSS rescoreEPSS 0.3% · 17th percentile
2026-10-12 18:42 UTCEG score recompute
2026-10-12 16:30 UTCEPSS rescoreEPSS 0.3% · 17th percentile
2026-10-11 22:06 UTCEG score recompute
2026-10-11 13:45 UTCEPSS rescoreEPSS 0.3% · 17th percentile
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2026-09-30 16:11 UTCEG score recompute
2026-09-30 15:01 UTCEPSS rescoreEPSS 0.3% · 17th percentile
2026-09-27 13:42 UTCEPSS rescoreEPSS 0.3% · 17th percentile
2026-09-26 19:03 UTCOSV refresh
2026-09-26 15:55 UTCEPSS rescoreEPSS 0.3% · 17th percentile
2026-09-26 00:22 UTCEPSS rescoreEPSS 0.3% · 17th percentile
2026-09-24 14:00 UTCEPSS rescoreEPSS 0.3% · 16th percentile
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2026-09-11 14:50 UTCEPSS rescoreEPSS 0.3% · 18th percentile
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2026-09-07 15:59 UTCEPSS rescoreEPSS 0.3% · 18th percentile
2026-09-07 04:48 UTCOSV refresh
2026-09-06 13:45 UTCEPSS rescoreEPSS 0.3% · 18th percentile
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2026-08-23 00:17 UTCEPSS rescoreEPSS 0.3% · 19th percentile
2026-08-21 23:46 UTCEPSS rescoreEPSS 0.3% · 19th percentile
2026-08-20 22:53 UTCEPSS rescoreEPSS 0.3% · 18th percentile
2026-08-20 14:31 UTCOSV refresh
2026-08-19 17:01 UTCEPSS rescoreEPSS 0.3% · 18th percentile
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2026-08-05 09:37 UTCEG score recompute
2026-08-05 09:37 UTCGHSA enrichmentGHSA-qvwc-r3r6-hq25 · GitHub CVSS 5.5
2026-08-04 15:07 UTCEPSS rescoreEPSS 0.3% · 18th percentile
2026-08-04 12:00 UTCEG score recompute
2026-08-04 11:59 UTCGHSA enrichmentGHSA-qvwc-r3r6-hq25 · GitHub CVSS 5.5
2026-08-04 10:35 UTCEPSS rescoreEPSS 0.3% · 17th percentile
2026-08-04 09:48 UTCEG score recompute
2026-08-04 09:48 UTCGHSA enrichmentGHSA-qvwc-r3r6-hq25 · GitHub CVSS 5.5
2026-08-03 10:33 UTCEPSS rescoreEPSS 0.3% · 17th percentile
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2026-07-31 18:42 UTCOSV refresh
2026-07-30 16:25 UTCEPSS rescoreEPSS 0.3% · 17th percentile

Same CWE

10 shown

CWE-125

Frequently asked(5)

What is CVE-2022-48839?

CVE-2022-48839 is a medium-severity vulnerability; its CVE record was published on July 16, 2024. In the Linux kernel, the following vulnerability has been resolved: net/packet: fix slab-out-of-bounds access in packet_recvmsg() syzbot found that when an AF_PACKET socket is using PACKET_COPY_THRESH and mmap operations, tpacket_rcv() is queueing skbs with garbage in skb->cb[], triggering a too…

When was the CVE record for CVE-2022-48839 published?

The CVE record for CVE-2022-48839 was published on July 16, 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 August 5, 2026; the record at its source may have been updated since.

Is CVE-2022-48839 actively exploited?

CVE-2022-48839 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0.3% probability of exploitation in the next 30 days (19th percentile of EPSS-scored CVEs).

What is the CVSS score of CVE-2022-48839?

CVE-2022-48839 has a CVSS v3 base score of 5.5 (NVD).

How do I remediate CVE-2022-48839?

A fix for CVE-2022-48839 is available: update to the fixed version the vendor names in its advisory.

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CVE-2022-48839

📅 Published

🔄 Last Modified

🔗 References (8)