CVE-2022-49592 net: stmmac: fix dma queue left shift overflow issue
An integer overflow in the stmmac network driver causes a shift-out-of-bounds error, potentially leading to a kernel crash or denial of service.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Local or same network only
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2022-49592?
CVE-2022-49592 is a high-severity vulnerability in Linux kernel, published on 26 Feb 2025. It can only be exploited from the same machine or local network, with no action from the victim.
Official description
In the Linux kernel, the following vulnerability has been resolved:
net: stmmac: fix dma queue left shift overflow issue
When queue number is > 4, left shift overflows due to 32 bits integer variable. Mask calculation is wrong for MTL_RXQ_DMA_MAP1.
If CONFIG_UBSAN is enabled, kernel dumps below warning: [ 10.363842] ================================================================== [ 10.363882] UBSAN: shift-out-of-bounds in /build/linux-intel-iotg-5.15-8e6Tf4/ linux-intel-iotg-5.15-5.15.0/drivers/net/ethernet/stmicro/stmmac/dwmac4_core.c:224:12 [ 10.363929] shift exponent 40 is too large for 32-bit type 'unsigned int' [ 10.363953] CPU: 1 PID: 599 Comm: NetworkManager Not tainted 5.15.0-1003-intel-iotg [ 10.363956] Hardware name: ADLINK Technology Inc. LEC-EL/LEC-EL, BIOS 0.15.11 12/22/2021 [ 10.363958] Call Trace: [ 10.363960] <TASK> [ 10.363963] dump_stack_lvl+0x4a/0x5f [ 10.363971] dump_stack+0x10/0x12 [ 10.363974] ubsan_epilogue+0x9/0x45 [ 10.363976] __ubsan_handle_shift_out_of_bounds.cold+0x61/0x10e [ 10.363979] ? wake_up_klogd+0x4a/0x50 [ 10.363983] ? vprintk_emit+0x8f/0x240 [ 10.363986] dwmac4_map_mtl_dma.cold+0x42/0x91 [stmmac] [ 10.364001] stmmac_mtl_configuration+0x1ce/0x7a0 [stmmac] [ 10.364009] ? dwmac410_dma_init_channel+0x70/0x70 [stmmac] [ 10.364020] stmmac_hw_setup.cold+0xf/0xb14 [stmmac] [ 10.364030] ? page_pool_alloc_pages+0x4d/0x70 [ 10.364034] ? stmmac_clear_tx_descriptors+0x6e/0xe0 [stmmac] [ 10.364042] stmmac_open+0x39e/0x920 [stmmac] [ 10.364050] __dev_open+0xf0/0x1a0 [ 10.364054] __dev_change_flags+0x188/0x1f0 [ 10.364057] dev_change_flags+0x26/0x60 [ 10.364059] do_setlink+0x908/0xc40 [ 10.364062] ? do_setlink+0xb10/0xc40 [ 10.364064] ? __nla_validate_parse+0x4c/0x1a0 [ 10.364068] __rtnl_newlink+0x597/0xa10 [ 10.364072] ? __nla_reserve+0x41/0x50 [ 10.364074] ? __kmalloc_node_track_caller+0x1d0/0x4d0 [ 10.364079] ? pskb_expand_head+0x75/0x310 [ 10.364082] ? nla_reserve_64bit+0x21/0x40 [ 10.364086] ? skb_free_head+0x65/0x80 [ 10.364089] ? security_sock_rcv_skb+0x2c/0x50 [ 10.364094] ? __cond_resched+0x19/0x30 [ 10.364097] ? kmem_cache_alloc_trace+0x15a/0x420 [ 10.364100] rtnl_newlink+0x49/0x70
This change fixes MTL_RXQ_DMA_MAP1 mask issue and channel/queue mapping warning.
BugLink: https://bugzilla.kernel.org/show_bug.cgi?id=216195
Weakness: CWE-787
Which versions are affected by CVE-2022-49592?
It affects 1 product.
Products include Linux kernel.
How do I fix CVE-2022-49592?
Apply the vendor's patch.
Is CVE-2022-49592 being exploited?
There is no known exploitation of CVE-2022-49592 in the wild and no public exploit code.
Other vulnerabilities in Linux kernel
Sources
Also known as DEBIAN-CVE-2022-49592, GHSA-cc84-pqv3-62xj, UBUNTU-CVE-2022-49592.