7.8

CVE-2022-48751: net/smc: Transitional solution for clcsock race issue

Modified
AliasesUBUNTU-CVE-2022-48751DEBIAN-CVE-2022-48751
Published 20-06-2024Last modified 05-08-2026

Vulnerability summary

CVE-2022-48751 is a high (CVSS 7.8) NULL Pointer Dereference vulnerability in linux. EPSS estimates a 0.22% chance of exploitation in the next 30 days, higher than 12.7% of scored vulnerabilities.

Priority
Routine

Not severe (CVSS 7.8, local access); no exploitation reported by the 5 checked sources

Source freshness unavailable

How is this decided?
CVSS score
7.8/10
010
High · v3.1 (CVE.org)
EPSS score
0.22%
0%100%
Low · 0.00 pp in 30 days
KEVNot listedNot listed by any tracked catalog.
RansomwareNot flaggedNo ransomware use recorded.
Public exploits0No public exploits recorded

Advisory lineage

Upstream 0 · Downstream 8 · Related 8
SUSE-SU-2024:2372-1SUSE-SU-2024:2394-1SUSE-SU-2024:2902-1SUSE-SU-2024:2929-1SUSE-SU-2024:2939-1SUSE-SU-2024:3189-1

Timeline

  1. 20-06-2024
    PublishedVulnerability first disclosed.
  2. 05-08-2026
    Last modifiedVulnerability information updated.

Description

In the Linux kernel, the following vulnerability has been resolved: net/smc: Transitional solution for clcsock race issue We encountered a crash in smc_setsockopt() and it is caused by accessing smc->clcsock after clcsock was released. BUG: kernel NULL pointer dereference, address: 0000000000000020 #PF: supervisor read access in kernel mode #PF: error_code(0x0000) - not-present page PGD 0 P4D 0 Oops: 0000 [#1] PREEMPT SMP PTI CPU: 1 PID: 50309 Comm: nginx Kdump: loaded Tainted: G E 5.16.0-rc4+ #53 RIP: 0010:smc_setsockopt+0x59/0x280 [smc] Call Trace: <TASK> __sys_setsockopt+0xfc/0x190 __x64_sys_setsockopt+0x20/0x30 do_syscall_64+0x34/0x90 entry_SYSCALL_64_after_hwframe+0x44/0xae RIP: 0033:0x7f16ba83918e </TASK> This patch tries to fix it by holding clcsock_release_lock and checking whether clcsock has already been released before access. In case that a crash of the same reason happens in smc_getsockopt() or smc_switch_to_fallback(), this patch also checkes smc->clcsock in them too. And the caller of smc_switch_to_fallback() will identify whether fallback succeeds according to the return value.

CVSS metrics

5 scores · 4 sources · 2 versions

EPSS trend

Probability

0.22%

Chance of exploitation in the next 30 days

Percentile

13%

Versus all other CVEs

30-day change

No change 0.00 pp

From 0.22% on 04-10-2026

04-10-202603-11-2026

Known exploited

Compare KEV catalogs
CISA KEV

Not in the CISA KEV catalog.

ENISA CNW

Not in the ENISA CNW catalog.

CIRCL

Not in the CIRCL catalog.

Public exploits

0 found

No public exploits indexed.

Weaknesses

CWE · root cause

Affected systems

Version check

Known conditions: local access, low-privilege account, no user interaction (CVSS vector). Other conditions: not stated in public data.

Ubuntu86 products
  • linuxAll versions (No fix recorded)
  • linux-allwinner-5.19All versions (No fix recorded)
  • linux-awsAll versions (No fix recorded)
  • linux-aws-5.0All versions (No fix recorded)
  • linux-aws-5.11All versions (No fix recorded)
Linux2 products
  • linux≥ fd57770dd198f5b2ddd5b9e6bf282cf98d63adb9, < 38f0bdd548fd2ef5d481b88d8a2bfef968452e34 | ≥ fd57770dd198f5b2ddd5b9e6bf282cf98d63adb9, < 4284225cd8001e134f5cf533a7cd244bbb654d0f | ≥ fd57770dd198f5b2ddd5b9e6bf282cf98d63adb9, < c0bf3d8a943b6f2e912b7c1de03e2ef28e76f760 | d1d004585b40c212b338fc8a40cbaaf230ea4703 | ≥ 4.19.299, < 4.20 | 5.1
  • linux_kernel≥ 4.19.299, < 4.20 | ≥ 5.1, < 5.15.19 | ≥ 5.16, < 5.16.5 | 5.17:rc1
Debian1 product
  • linux< 5.16.7-1

3 vendors · 89 products

References

7 links