net: usb: ax88179_178a: fix skb leak in ax88179_tx_fixup()
- Published
- Last modified
- Where the record stands: published, rejected by its publisher, or superseded by another id.What do these mean? →
- published
- Whether CISA lists it in its Known Exploited Vulnerabilities catalog: proof that attackers are using it.What do these mean? →
- Not listed in CISA KEV
- Fix
- Fixed in 6.1.183, 6.6.152, 6.12.104, 6.18.45, 7.1.9
- Whether working attack code is public (Exploit-DB, Metasploit, Nuclei or GitHub). Public code makes attacks easier.What do these mean? →
- None on Exploit-DB, Metasploit or GitHub
- Exploitation: none
- Automatable: yes
- Technical impact: partial
Summary
In the Linux kernel, the following vulnerability has been resolved: net: usb: ax88179_178a: fix skb leak in ax88179_tx_fixup() When the interface has NETIF_F_SG enabled and skb_linearize() fails in ax88179_tx_fixup(), the function returns NULL without freeing the skb. usbnet_start_xmit() treats a NULL return from tx_fixup() as a drop (info->flags does not set FLAG_MULTI_PACKET for this driver), jumping to the "drop" label where it does `if (skb) dev_kfree_skb_any(skb)`. Because tx_fixup() returned NULL, the local skb variable in usbnet_start_xmit() is NULL, so the original skb is never freed — a memory leak on every TX frame whose linearization fails (i.e. under memory pressure). Free the skb before returning, matching the error handling already used for the pskb_expand_head() failure path in the same function.
Timeline
- CVE published
- CISA SSVC assessment
Exploitation: none · Automatable: yes · Technical impact: partial
- Record last updated
Affected versions
- Linux Linux
From 16b1c4e01c89ba07367461e0bc4cb84993c2d027 · fixed in 83a765cbd7b4d11b0b9fa1bb9d941ae911a2159b; From 16b1c4e01c89ba07367461e0bc4cb84993c2d027 · fixed in 1c63303659a2264bd55d9813df74cb4caeed5922; From 16b1c4e01c89ba07367461e0bc4cb84993c2d027 · fixed in 2be5091fa693b9119ad25a8bb8c149d236a23ade; From 16b1c4e01c89ba07367461e0bc4cb84993c2d027 · fixed in 58733b1dd46bb231d9d279c132a20ee46da1b664; From 16b1c4e01c89ba07367461e0bc4cb84993c2d027 · fixed in 4039cd807a5a46dc5f7618fffae926b8ad8455eb; From 16b1c4e01c89ba07367461e0bc4cb84993c2d027 · fixed in 1f428e30947395d9b9aacee03e25a4e6cfcad7a4
- Linux Linux
5.17
- KernelLinux
From 5.17.0 · fixed in 6.1.183; From 6.2.0 · fixed in 6.6.152; From 6.7.0 · fixed in 6.12.104; From 6.13.0 · fixed in 6.18.45; From 6.19.0 · fixed in 7.1.9