5.5

CVE-2022-48647: sfc: fix TX channel offset when using legacy interrupts

Analyzed
AliasesUBUNTU-CVE-2022-48647DEBIAN-CVE-2022-48647
Published 28-04-2024Last modified 23-05-2026

Vulnerability summary

CVE-2022-48647 is a medium (CVSS 5.5) NULL Pointer Dereference vulnerability in linux. EPSS estimates a 0.23% chance of exploitation in the next 30 days, higher than 13.3% of scored vulnerabilities.

Priority
Routine

Not severe (CVSS 5.5, local access); no exploitation reported by the 5 checked sources

Source freshness unavailable

How is this decided?
CVSS score
5.5/10
010
Medium · v3.1 (NVD)
EPSS score
0.23%
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 5 · Related 5
SUSE-SU-2024:1641-1SUSE-SU-2024:1644-1SUSE-SU-2024:1647-1SUSE-SU-2024:1659-1SUSE-SU-2024:1663-1

Timeline

  1. 28-04-2024
    PublishedVulnerability first disclosed.
  2. 23-05-2026
    Last modifiedVulnerability information updated.

Description

In the Linux kernel, the following vulnerability has been resolved: sfc: fix TX channel offset when using legacy interrupts In legacy interrupt mode the tx_channel_offset was hardcoded to 1, but that's not correct if efx_sepparate_tx_channels is false. In that case, the offset is 0 because the tx queues are in the single existing channel at index 0, together with the rx queue. Without this fix, as soon as you try to send any traffic, it tries to get the tx queues from an uninitialized channel getting these errors: WARNING: CPU: 1 PID: 0 at drivers/net/ethernet/sfc/tx.c:540 efx_hard_start_xmit+0x12e/0x170 [sfc] [...] RIP: 0010:efx_hard_start_xmit+0x12e/0x170 [sfc] [...] Call Trace: <IRQ> dev_hard_start_xmit+0xd7/0x230 sch_direct_xmit+0x9f/0x360 __dev_queue_xmit+0x890/0xa40 [...] BUG: unable to handle kernel NULL pointer dereference at 0000000000000020 [...] RIP: 0010:efx_hard_start_xmit+0x153/0x170 [sfc] [...] Call Trace: <IRQ> dev_hard_start_xmit+0xd7/0x230 sch_direct_xmit+0x9f/0x360 __dev_queue_xmit+0x890/0xa40 [...]

CVSS metrics

3 scores · 3 sources · 1 version

EPSS trend

Probability

0.23%

Chance of exploitation in the next 30 days

Percentile

13%

Versus all other CVEs

30-day change

No change 0.00 pp

From 0.23% 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.

Ubuntu85 products
  • linux< 5.15.0-57.63
  • linux-allwinner-5.19All versions (No fix recorded)
  • linux-aws< 5.15.0-1027.31
  • linux-aws-5.0All versions (No fix recorded)
  • linux-aws-5.11All versions (No fix recorded)
Linux2 products
  • linux≥ bf2af9b24313553f3f0b30443220ab0ac8595d2d, < b4afd3878f961d3517f27b3213730fceef77945c | ≥ 06cb7e134f8f4a11b66f1dbeb5f237412a0aeedc, < 360910b88d1466a90644a4e0533803b594344a2b | ≥ c308dfd1b43ef0d4c3e57b741bb3462eb7a7f4a2, < 5f623a77cfc2d501d72bcb4f9ee71721e6c766ff | ≥ c308dfd1b43ef0d4c3e57b741bb3462eb7a7f4a2, < f232af4295653afa4ade3230462b3be15ad16419 | 1a7c0b3ef93d1d1dae7b0a85dab3ac6e3ad0ef61 | b2d60329a0b88c4e35017436ee29c43be59d46a5 | ≥ 5.10.122, < 5.10.146 | ≥ 5.15.47, < 5.15.71 | ≥ 5.17.15, < 5.18 | ≥ 5.18.4, < 5.19 | 5.19
  • linux_kernel≥ 5.10.122, < 5.10.146 | ≥ 5.15.47, < 5.15.71 | ≥ 5.17.15, < 5.18 | ≥ 5.18.4, < 5.19.12 | 6.0:rc1 | 6.0:rc2 | 6.0:rc3 | 6.0:rc4 | 6.0:rc5 | 6.0:rc6
Debian1 product
  • linux< 6.0.2-1

3 vendors · 88 products

References

8 links