CVE-2022-49904
CVE.org · Published
- Record status
- Published
- Identifier year (not publication year)
- 2022
- Source publication
- Source updated
- Imported by cveboard
- Source snapshot
- cve_2026-10-24_midnight_baseline ·
CNA source text (English)
net, neigh: Fix null-ptr-deref in neigh_table_clear()
In the Linux kernel, the following vulnerability has been resolved: net, neigh: Fix null-ptr-deref in neigh_table_clear() When IPv6 module gets initialized but hits an error in the middle, kenel panic with: KASAN: null-ptr-deref in range [0x0000000000000598-0x000000000000059f] CPU: 1 PID: 361 Comm: insmod Hardware name: QEMU Standard PC (i440FX + PIIX, 1996) RIP: 0010:__neigh_ifdown.isra.0+0x24b/0x370 RSP: 0018:ffff888012677908 EFLAGS: 00000202 ... Call Trace: <TASK> neigh_table_clear+0x94/0x2d0 ndisc_cleanup+0x27/0x40 [ipv6] inet6_init+0x21c/0x2cb [ipv6] do_one_initcall+0xd3/0x4d0 do_init_module+0x1ae/0x670 ... Kernel panic - not syncing: Fatal exception When ipv6 initialization fails, it will try to cleanup and calls: neigh_table_clear() neigh_ifdown(tbl, NULL) pneigh_queue_purge(&tbl->proxy_queue, dev_net(dev == NULL)) # dev_net(NULL) triggers null-ptr-deref. Fix it by passing NULL to pneigh_queue_purge() in neigh_ifdown() if dev is NULL, to make kernel not panic immediately.
Scoped product and version facts
Fix information unknown; no fixed version is derived here. Missing information does not prove that no fix exists.
Exploitation unknown; this catalogue does not assess exploitation.
Linux
- Vendor
- Linux
- Product
- Linux
- Platforms
- Unknown
- Default status
unaffected
| Version (version) | Status (status) | Version scheme (versionType) | Exclusive end (lessThan) | Inclusive end (lessThanOrEqual) | Status changes (at → status) |
|---|---|---|---|---|---|
| 9bbaed571c4bf1b62ac8703cb359dc090efc3455 | affected | git | 0d38b4ca6679e72860ff8730e79bb99d0e9fa3b0 | Unavailable | None listed |
| 05fdce1ae744dee43c9181fd063c9c0db4f777f2 | affected | git | b736592de2aa53aee2d48d6b129bc0c892007bbe | Unavailable | None listed |
| 51be9dd391fd25872b95708a0250f2f7722d2d8e | affected | git | b49f6b2f21f543d4dc88fb7b1ec2adccb822f27c | Unavailable | None listed |
| c35adafe42bd6c3bf2aca0a3f523dabc38fc23c8 | affected | git | 1c89642e7f2b7ecc9635610653f5c2f0276c0051 | Unavailable | None listed |
| db6fa03d80ab076238fc806c9925d1f8b9639d1b | affected | git | 2b45d6d0c41cb9593868e476681efb1aae5078a1 | Unavailable | None listed |
| 66ba215cb51323e4e55e38fd5f250e0fae0cbc94 | affected | git | a99a8ec4c62180c889482a2ff6465033e0743458 | Unavailable | None listed |
| 66ba215cb51323e4e55e38fd5f250e0fae0cbc94 | affected | git | f8017317cb0b279b8ab98b0f3901a2e0ac880dad | Unavailable | None listed |
| 2dd5ed474115150d8175825bc3b56c6385c3a83b | affected | git | Unavailable | Unavailable | None listed |
| 4.14.292 | affected | semver | 4.14.299 | Unavailable | None listed |
| 4.19.257 | affected | semver | 4.19.265 | Unavailable | None listed |
| 5.4.212 | affected | semver | 5.4.224 | Unavailable | None listed |
| 5.10.141 | affected | semver | 5.10.154 | Unavailable | None listed |
| 5.15.65 | affected | semver | 5.15.78 | Unavailable | None listed |
| 5.19.7 | affected | semver | 5.20 | Unavailable | None listed |
Linux
- Vendor
- Linux
- Product
- Linux
- Platforms
- Unknown
- Default status
affected
| Version (version) | Status (status) | Version scheme (versionType) | Exclusive end (lessThan) | Inclusive end (lessThanOrEqual) | Status changes (at → status) |
|---|---|---|---|---|---|
| 6.0 | affected | Unavailable | Unavailable | Unavailable | None listed |
| 0 | unaffected | semver | 6.0 | Unavailable | None listed |
| 4.14.299 | unaffected | semver | Unavailable | 4.14.* | None listed |
| 4.19.265 | unaffected | semver | Unavailable | 4.19.* | None listed |
| 5.4.224 | unaffected | semver | Unavailable | 5.4.* | None listed |
| 5.10.154 | unaffected | semver | Unavailable | 5.10.* | None listed |
| 5.15.78 | unaffected | semver | Unavailable | 5.15.* | None listed |
| 6.0.8 | unaffected | semver | Unavailable | 6.0.* | None listed |
| 6.1 | unaffected | original_commit_for_fix | Unavailable | * | None listed |