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osvGoogleOSV:CVE-2024-43839
HistoryAug 17, 2024 - 10:15 a.m.

CVE-2024-43839

2024-08-1710:15:09
Google
osv.dev
linux kernel
vulnerability
cve-2024-43839
bna
bna_tcb
bna_ccb
sprintf
snprintf
static analysis
svace
software
security

AI Score

6.7

Confidence

Low

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

bna: adjust ‘name’ buf size of bna_tcb and bna_ccb structures

To have enough space to write all possible sprintf() args. Currently
‘name’ size is 16, but the first ‘%s’ specifier may already need at
least 16 characters, since ‘bnad->netdev->name’ is used there.

For ‘%d’ specifiers, assume that they require:

  • 1 char for ‘tx_id + tx_info->tcb[i]->id’ sum, BNAD_MAX_TXQ_PER_TX is 8
  • 2 chars for ‘rx_id + rx_info->rx_ctrl[i].ccb->id’, BNAD_MAX_RXP_PER_RX
    is 16

And replace sprintf with snprintf.

Detected using the static analysis tool - Svace.